diff options
67 files changed, 2700 insertions, 285 deletions
diff --git a/Documentation/ABI/obsolete/proc-pid-oom_adj b/Documentation/ABI/obsolete/proc-pid-oom_adj new file mode 100644 index 000000000000..cf63f264ce0f --- /dev/null +++ b/Documentation/ABI/obsolete/proc-pid-oom_adj @@ -0,0 +1,22 @@ +What: /proc/<pid>/oom_adj +When: August 2012 +Why: /proc/<pid>/oom_adj allows userspace to influence the oom killer's + badness heuristic used to determine which task to kill when the kernel + is out of memory. + + The badness heuristic has since been rewritten since the introduction of + this tunable such that its meaning is deprecated. The value was + implemented as a bitshift on a score generated by the badness() + function that did not have any precise units of measure. With the + rewrite, the score is given as a proportion of available memory to the + task allocating pages, so using a bitshift which grows the score + exponentially is, thus, impossible to tune with fine granularity. + + A much more powerful interface, /proc/<pid>/oom_score_adj, was + introduced with the oom killer rewrite that allows users to increase or + decrease the badness() score linearly. This interface will replace + /proc/<pid>/oom_adj. + + A warning will be emitted to the kernel log if an application uses this + deprecated interface. After it is printed once, future warnings will be + suppressed until the kernel is rebooted. diff --git a/Documentation/filesystems/xfs-delayed-logging-design.txt b/Documentation/filesystems/xfs-delayed-logging-design.txt index 96d0df28bed3..7445bf335dae 100644 --- a/Documentation/filesystems/xfs-delayed-logging-design.txt +++ b/Documentation/filesystems/xfs-delayed-logging-design.txt @@ -794,17 +794,6 @@ designed. Roadmap: -2.6.37 Remove experimental tag from mount option - => should be roughly 6 months after initial merge - => enough time to: - => gain confidence and fix problems reported by early - adopters (a.k.a. guinea pigs) - => address worst performance regressions and undesired - behaviours - => start tuning/optimising code for parallelism - => start tuning/optimising algorithms consuming - excessive CPU time - 2.6.39 Switch default mount option to use delayed logging => should be roughly 12 months after initial merge => enough time to shake out remaining problems before next round of diff --git a/Documentation/leds-class.txt b/Documentation/leds-class.txt index 8fd5ca2ae32d..58b266bd1846 100644 --- a/Documentation/leds-class.txt +++ b/Documentation/leds-class.txt @@ -60,15 +60,18 @@ Hardware accelerated blink of LEDs Some LEDs can be programmed to blink without any CPU interaction. To support this feature, a LED driver can optionally implement the -blink_set() function (see <linux/leds.h>). If implemented, triggers can -attempt to use it before falling back to software timers. The blink_set() -function should return 0 if the blink setting is supported, or -EINVAL -otherwise, which means that LED blinking will be handled by software. - -The blink_set() function should choose a user friendly blinking -value if it is called with *delay_on==0 && *delay_off==0 parameters. In -this case the driver should give back the chosen value through delay_on -and delay_off parameters to the leds subsystem. +blink_set() function (see <linux/leds.h>). To set an LED to blinking, +however, it is better to use use the API function led_blink_set(), +as it will check and implement software fallback if necessary. + +To turn off blinking again, use the API function led_brightness_set() +as that will not just set the LED brightness but also stop any software +timers that may have been required for blinking. + +The blink_set() function should choose a user friendly blinking value +if it is called with *delay_on==0 && *delay_off==0 parameters. In this +case the driver should give back the chosen value through delay_on and +delay_off parameters to the leds subsystem. Setting the brightness to zero with brightness_set() callback function should completely turn off the LED and cancel the previously programmed diff --git a/Documentation/leds/leds-lp5521.txt b/Documentation/leds/leds-lp5521.txt new file mode 100644 index 000000000000..c4d8d151e0fe --- /dev/null +++ b/Documentation/leds/leds-lp5521.txt @@ -0,0 +1,88 @@ +Kernel driver for lp5521 +======================== + +* National Semiconductor LP5521 led driver chip +* Datasheet: http://www.national.com/pf/LP/LP5521.html + +Authors: Mathias Nyman, Yuri Zaporozhets, Samu Onkalo +Contact: Samu Onkalo (samu.p.onkalo-at-nokia.com) + +Description +----------- + +LP5521 can drive up to 3 channels. Leds can be controlled directly via +the led class control interface. Channels have generic names: +lp5521:channelx, where x is 0 .. 2 + +All three channels can be also controlled using the engine micro programs. +More details of the instructions can be found from the public data sheet. + +Control interface for the engines: +x is 1 .. 3 +enginex_mode : disabled, load, run +enginex_load : store program (visible only in engine load mode) + +Example (start to blink the channel 2 led): +cd /sys/class/leds/lp5521:channel2/device +echo "load" > engine3_mode +echo "037f4d0003ff6000" > engine3_load +echo "run" > engine3_mode + +stop the engine: +echo "disabled" > engine3_mode + +sysfs contains a selftest entry. +The test communicates with the chip and checks that +the clock mode is automatically set to the requested one. + +Each channel has its own led current settings. +/sys/class/leds/lp5521:channel0/led_current - RW +/sys/class/leds/lp5521:channel0/max_current - RO +Format: 10x mA i.e 10 means 1.0 mA + +example platform data: + +Note: chan_nr can have values between 0 and 2. + +static struct lp5521_led_config lp5521_led_config[] = { + { + .chan_nr = 0, + .led_current = 50, + .max_current = 130, + }, { + .chan_nr = 1, + .led_current = 0, + .max_current = 130, + }, { + .chan_nr = 2, + .led_current = 0, + .max_current = 130, + } +}; + +static int lp5521_setup(void) +{ + /* setup HW resources */ +} + +static void lp5521_release(void) +{ + /* Release HW resources */ +} + +static void lp5521_enable(bool state) +{ + /* Control of chip enable signal */ +} + +static struct lp5521_platform_data lp5521_platform_data = { + .led_config = lp5521_led_config, + .num_channels = ARRAY_SIZE(lp5521_led_config), + .clock_mode = LP5521_CLOCK_EXT, + .setup_resources = lp5521_setup, + .release_resources = lp5521_release, + .enable = lp5521_enable, +}; + +If the current is set to 0 in the platform data, that channel is +disabled and it is not visible in the sysfs. diff --git a/Documentation/leds/leds-lp5523.txt b/Documentation/leds/leds-lp5523.txt new file mode 100644 index 000000000000..fad2feb8b7ce --- /dev/null +++ b/Documentation/leds/leds-lp5523.txt @@ -0,0 +1,83 @@ +Kernel driver for lp5523 +======================== + +* National Semiconductor LP5523 led driver chip +* Datasheet: http://www.national.com/pf/LP/LP5523.html + +Authors: Mathias Nyman, Yuri Zaporozhets, Samu Onkalo +Contact: Samu Onkalo (samu.p.onkalo-at-nokia.com) + +Description +----------- +LP5523 can drive up to 9 channels. Leds can be controlled directly via +the led class control interface. Channels have generic names: +lp5523:channelx where x is 0...8 + +The chip provides 3 engines. Each engine can control channels without +interaction from the main CPU. Details of the micro engine code can be found +from the public data sheet. Leds can be muxed to different channels. + +Control interface for the engines: +x is 1 .. 3 +enginex_mode : disabled, load, run +enginex_load : microcode load (visible only in load mode) +enginex_leds : led mux control (visible only in load mode) + +cd /sys/class/leds/lp5523:channel2/device +echo "load" > engine3_mode +echo "9d80400004ff05ff437f0000" > engine3_load +echo "111111111" > engine3_leds +echo "run" > engine3_mode + +sysfs contains a selftest entry. It measures each channel +voltage level and checks if it looks reasonable. If the level is too high, +the led is missing; if the level is too low, there is a short circuit. + +Selftest uses always the current from the platform data. + +Each channel contains led current settings. +/sys/class/leds/lp5523:channel2/led_current - RW +/sys/class/leds/lp5523:channel2/max_current - RO +Format: 10x mA i.e 10 means 1.0 mA + +Example platform data: + +Note - chan_nr can have values between 0 and 8. + +static struct lp5523_led_config lp5523_led_config[] = { + { + .chan_nr = 0, + .led_current = 50, + .max_current = 130, + }, +... + }, { + .chan_nr = 8, + .led_current = 50, + .max_current = 130, + } +}; + +static int lp5523_setup(void) +{ + /* Setup HW resources */ +} + +static void lp5523_release(void) +{ + /* Release HW resources */ +} + +static void lp5523_enable(bool state) +{ + /* Control chip enable signal */ +} + +static struct lp5523_platform_data lp5523_platform_data = { + .led_config = lp5523_led_config, + .num_channels = ARRAY_SIZE(lp5523_led_config), + .clock_mode = LP5523_CLOCK_EXT, + .setup_resources = lp5523_setup, + .release_resources = lp5523_release, + .enable = lp5523_enable, +}; diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index 3894eaa23486..209e1584c3dc 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -28,6 +28,7 @@ show up in /proc/sys/kernel: - core_uses_pid - ctrl-alt-del - dentry-state +- dmesg_restrict - domainname - hostname - hotplug @@ -213,6 +214,19 @@ to decide what to do with it. ============================================================== +dmesg_restrict: + +This toggle indicates whether unprivileged users are prevented from using +dmesg(8) to view messages from the kernel's log buffer. When +dmesg_restrict is set to (0) there are no restrictions. When +dmesg_restrict is set set to (1), users must have CAP_SYS_ADMIN to use +dmesg(8). + +The kernel config option CONFIG_SECURITY_DMESG_RESTRICT sets the default +value of dmesg_restrict. + +============================================================== + domainname & hostname: These files can be used to set the NIS/YP domainname and the diff --git a/arch/um/include/asm/ptrace-generic.h b/arch/um/include/asm/ptrace-generic.h index 2cd899f75a3c..b7c5bab9bd77 100644 --- a/arch/um/include/asm/ptrace-generic.h +++ b/arch/um/include/asm/ptrace-generic.h @@ -38,8 +38,8 @@ struct pt_regs { struct task_struct; -extern long subarch_ptrace(struct task_struct *child, long request, long addr, - long data); +extern long subarch_ptrace(struct task_struct *child, long request, + unsigned long addr, unsigned long data); extern unsigned long getreg(struct task_struct *child, int regno); extern int putreg(struct task_struct *child, int regno, unsigned long value); extern int get_fpregs(struct user_i387_struct __user *buf, diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index a5e33f29bbeb..701b672c1122 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -122,7 +122,7 @@ long arch_ptrace(struct task_struct *child, long request, break; case PTRACE_SET_THREAD_AREA: - ret = ptrace_set_thread_area(child, addr, datavp); + ret = ptrace_set_thread_area(child, addr, vp); break; case PTRACE_FAULTINFO: { diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c index de3078215fe6..75586f1f86e7 100644 --- a/crypto/pcrypt.c +++ b/crypto/pcrypt.c @@ -504,7 +504,6 @@ err: static void pcrypt_fini_padata(struct padata_pcrypt *pcrypt) { - kobject_put(&pcrypt->pinst->kobj); free_cpumask_var(pcrypt->cb_cpumask->mask); kfree(pcrypt->cb_cpumask); diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index cc2a88d5192f..77b8fd20cd90 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -10,7 +10,7 @@ menuconfig NEW_LEDS if NEW_LEDS config LEDS_CLASS - tristate "LED Class Support" + bool "LED Class Support" help This option enables the led sysfs class in /sys/class/leds. You'll need this to do anything useful with LEDs. If unsure, say N. @@ -176,6 +176,24 @@ config LEDS_LP3944 To compile this driver as a module, choose M here: the module will be called leds-lp3944. +config LEDS_LP5521 + tristate "LED Support for N.S. LP5521 LED driver chip" + depends on LEDS_CLASS && I2C + help + If you say yes here you get support for the National Semiconductor + LP5521 LED driver. It is 3 channel chip with programmable engines. + Driver provides direct control via LED class and interface for + programming the engines. + +config LEDS_LP5523 + tristate "LED Support for N.S. LP5523 LED driver chip" + depends on LEDS_CLASS && I2C + help + If you say yes here you get support for the National Semiconductor + LP5523 LED driver. It is 9 channel chip with programmable engines. + Driver provides direct control via LED class and interface for + programming the engines. + config LEDS_CLEVO_MAIL tristate "Mail LED on Clevo notebook" depends on X86 && SERIO_I8042 && DMI diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 9c96db40ef6d..aae6989ff6b6 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -23,6 +23,8 @@ obj-$(CONFIG_LEDS_SUNFIRE) += leds-sunfire.o obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o +obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o +obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o obj-$(CONFIG_LEDS_CLEVO_MAIL) += leds-clevo-mail.o obj-$(CONFIG_LEDS_HP6XX) += leds-hp6xx.o obj-$(CONFIG_LEDS_FSG) += leds-fsg.o diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 260660076507..211e21f34bd5 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -81,6 +81,79 @@ static struct device_attribute led_class_attrs[] = { __ATTR_NULL, }; +static void led_timer_function(unsigned long data) +{ + struct led_classdev *led_cdev = (void *)data; + unsigned long brightness; + unsigned long delay; + + if (!led_cdev->blink_delay_on || !led_cdev->blink_delay_off) { + led_set_brightness(led_cdev, LED_OFF); + return; + } + + brightness = led_get_brightness(led_cdev); + if (!brightness) { + /* Time to switch the LED on. */ + brightness = led_cdev->blink_brightness; + delay = led_cdev->blink_delay_on; + } else { + /* Store the current brightness value to be able + * to restore it when the delay_off period is over. + */ + led_cdev->blink_brightness = brightness; + brightness = LED_OFF; + delay = led_cdev->blink_delay_off; + } + + led_set_brightness(led_cdev, brightness); + + mod_timer(&led_cdev->blink_timer, jiffies + msecs_to_jiffies(delay)); +} + +static void led_stop_software_blink(struct led_classdev *led_cdev) +{ + /* deactivate previous settings */ + del_timer_sync(&led_cdev->blink_timer); + led_cdev->blink_delay_on = 0; + led_cdev->blink_delay_off = 0; +} + +static void led_set_software_blink(struct led_classdev *led_cdev, + unsigned long delay_on, + unsigned long delay_off) +{ + int current_brightness; + + current_brightness = led_get_brightness(led_cdev); + if (current_brightness) + led_cdev->blink_brightness = current_brightness; + if (!led_cdev->blink_brightness) + led_cdev->blink_brightness = led_cdev->max_brightness; + + if (delay_on == led_cdev->blink_delay_on && + delay_off == led_cdev->blink_delay_off) + return; + + led_stop_software_blink(led_cdev); + + led_cdev->blink_delay_on = delay_on; + led_cdev->blink_delay_off = delay_off; + + /* never on - don't blink */ + if (!delay_on) + return; + + /* never off - just set to brightness */ + if (!delay_off) { + led_set_brightness(led_cdev, led_cdev->blink_brightness); + return; + } + + mod_timer(&led_cdev->blink_timer, jiffies + 1); +} + + /** * led_classdev_suspend - suspend an led_classdev. * @led_cdev: the led_classdev to suspend. @@ -148,6 +221,10 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev) led_update_brightness(led_cdev); + init_timer(&led_cdev->blink_timer); + led_cdev->blink_timer.function = led_timer_function; + led_cdev->blink_timer.data = (unsigned long)led_cdev; + #ifdef CONFIG_LEDS_TRIGGERS led_trigger_set_default(led_cdev); #endif @@ -157,7 +234,6 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev) return 0; } - EXPORT_SYMBOL_GPL(led_classdev_register); /** @@ -175,6 +251,9 @@ void led_classdev_unregister(struct led_classdev *led_cdev) up_write(&led_cdev->trigger_lock); #endif + /* Stop blinking */ + led_brightness_set(led_cdev, LED_OFF); + device_unregister(led_cdev->dev); down_write(&leds_list_lock); @@ -183,6 +262,30 @@ void led_classdev_unregister(struct led_classdev *led_cdev) } EXPORT_SYMBOL_GPL(led_classdev_unregister); +void led_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, + unsigned long *delay_off) +{ + if (led_cdev->blink_set && + led_cdev->blink_set(led_cdev, delay_on, delay_off)) + return; + + /* blink with 1 Hz as default if nothing specified */ + if (!*delay_on && !*delay_off) + *delay_on = *delay_off = 500; + + led_set_software_blink(led_cdev, *delay_on, *delay_off); +} +EXPORT_SYMBOL(led_blink_set); + +void led_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + led_stop_software_blink(led_cdev); + led_cdev->brightness_set(led_cdev, brightness); +} +EXPORT_SYMBOL(led_brightness_set); + static int __init leds_init(void) { leds_class = class_create(THIS_MODULE, "leds"); diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c index f1c00db88b5e..c41eb6180c9c 100644 --- a/drivers/leds/led-triggers.c +++ b/drivers/leds/led-triggers.c @@ -113,7 +113,7 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger) if (led_cdev->trigger->deactivate) led_cdev->trigger->deactivate(led_cdev); led_cdev->trigger = NULL; - led_set_brightness(led_cdev, LED_OFF); + led_brightness_set(led_cdev, LED_OFF); } if (trigger) { write_lock_irqsave(&trigger->leddev_list_lock, flags); diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index ea57e05d08f3..4d9fa38d9ff6 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -316,7 +316,7 @@ static struct of_platform_driver of_gpio_leds_driver = { static int __init gpio_led_init(void) { - int ret; + int ret = 0; #ifdef CONFIG_LEDS_GPIO_PLATFORM ret = platform_driver_register(&gpio_led_driver); diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c new file mode 100644 index 000000000000..3782f31f06d2 --- /dev/null +++ b/drivers/leds/leds-lp5521.c @@ -0,0 +1,821 @@ +/* + * LP5521 LED chip driver. + * + * Copyright (C) 2010 Nokia Corporation + * + * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/mutex.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/ctype.h> +#include <linux/spinlock.h> +#include <linux/wait.h> +#include <linux/leds.h> +#include <linux/leds-lp5521.h> +#include <linux/workqueue.h> +#include <linux/slab.h> + +#define LP5521_PROGRAM_LENGTH 32 /* in bytes */ + +#define LP5521_MAX_LEDS 3 /* Maximum number of LEDs */ +#define LP5521_MAX_ENGINES 3 /* Maximum number of engines */ + +#define LP5521_ENG_MASK_BASE 0x30 /* 00110000 */ +#define LP5521_ENG_STATUS_MASK 0x07 /* 00000111 */ + +#define LP5521_CMD_LOAD 0x15 /* 00010101 */ +#define LP5521_CMD_RUN 0x2a /* 00101010 */ +#define LP5521_CMD_DIRECT 0x3f /* 00111111 */ +#define LP5521_CMD_DISABLED 0x00 /* 00000000 */ + +/* Registers */ +#define LP5521_REG_ENABLE 0x00 +#define LP5521_REG_OP_MODE 0x01 +#define LP5521_REG_R_PWM 0x02 +#define LP5521_REG_G_PWM 0x03 +#define LP5521_REG_B_PWM 0x04 +#define LP5521_REG_R_CURRENT 0x05 +#define LP5521_REG_G_CURRENT 0x06 +#define LP5521_REG_B_CURRENT 0x07 +#define LP5521_REG_CONFIG 0x08 +#define LP5521_REG_R_CHANNEL_PC 0x09 +#define LP5521_REG_G_CHANNEL_PC 0x0A +#define LP5521_REG_B_CHANNEL_PC 0x0B +#define LP5521_REG_STATUS 0x0C +#define LP5521_REG_RESET 0x0D +#define LP5521_REG_GPO 0x0E +#define LP5521_REG_R_PROG_MEM 0x10 +#define LP5521_REG_G_PROG_MEM 0x30 +#define LP5521_REG_B_PROG_MEM 0x50 + +#define LP5521_PROG_MEM_BASE LP5521_REG_R_PROG_MEM +#define LP5521_PROG_MEM_SIZE 0x20 + +/* Base register to set LED current */ +#define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT + +/* Base register to set the brightness */ +#define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM + +/* Bits in ENABLE register */ +#define LP5521_MASTER_ENABLE 0x40 /* Chip master enable */ +#define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ +#define LP5521_EXEC_RUN 0x2A + +/* Bits in CONFIG register */ +#define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */ +#define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */ +#define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */ +#define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */ +#define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */ +#define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */ +#define LP5521_R_TO_BATT 4 /* R out: 0 = CP, 1 = Vbat */ +#define LP5521_CLK_SRC_EXT 0 /* Ext-clk source (CLK_32K) */ +#define LP5521_CLK_INT 1 /* Internal clock */ +#define LP5521_CLK_AUTO 2 /* Automatic clock selection */ + +/* Status */ +#define LP5521_EXT_CLK_USED 0x08 + +struct lp5521_engine { + const struct attribute_group *attributes; + int id; + u8 mode; + u8 prog_page; + u8 engine_mask; +}; + +struct lp5521_led { + int id; + u8 chan_nr; + u8 led_current; + u8 max_current; + struct led_classdev cdev; + struct work_struct brightness_work; + u8 brightness; +}; + +struct lp5521_chip { + struct lp5521_platform_data *pdata; + struct mutex lock; /* Serialize control */ + struct i2c_client *client; + struct lp5521_engine engines[LP5521_MAX_ENGINES]; + struct lp5521_led leds[LP5521_MAX_LEDS]; + u8 num_channels; + u8 num_leds; +}; + +#define cdev_to_led(c) container_of(c, struct lp5521_led, cdev) +#define engine_to_lp5521(eng) container_of((eng), struct lp5521_chip, \ + engines[(eng)->id - 1]) +#define led_to_lp5521(led) container_of((led), struct lp5521_chip, \ + leds[(led)->id]) + +static void lp5521_led_brightness_work(struct work_struct *work); + +static inline int lp5521_write(struct i2c_client *client, u8 reg, u8 value) +{ + return i2c_smbus_write_byte_data(client, reg, value); +} + +static int lp5521_read(struct i2c_client *client, u8 reg, u8 *buf) +{ + s32 ret; + + ret = i2c_smbus_read_byte_data(client, reg); + if (ret < 0) + return -EIO; + + *buf = ret; + return 0; +} + +static int lp5521_set_engine_mode(struct lp5521_engine *engine, u8 mode) +{ + struct lp5521_chip *chip = engine_to_lp5521(engine); + struct i2c_client *client = chip->client; + int ret; + u8 engine_state; + + /* Only transition between RUN and DIRECT mode are handled here */ + if (mode == LP5521_CMD_LOAD) + return 0; + + if (mode == LP5521_CMD_DISABLED) + mode = LP5521_CMD_DIRECT; + + ret = lp5521_read(client, LP5521_REG_OP_MODE, &engine_state); + + /* set mode only for this engine */ + engine_state &= ~(engine->engine_mask); + mode &= engine->engine_mask; + engine_state |= mode; + ret |= lp5521_write(client, LP5521_REG_OP_MODE, engine_state); + + return ret; +} + +static int lp5521_load_program(struct lp5521_engine *eng, const u8 *pattern) +{ + struct lp5521_chip *chip = engine_to_lp5521(eng); + struct i2c_client *client = chip->client; + int ret; + int addr; + u8 mode; + + /* move current engine to direct mode and remember the state */ + ret = lp5521_set_engine_mode(eng, LP5521_CMD_DIRECT); + usleep_range(1000, 10000); + ret |= lp5521_read(client, LP5521_REG_OP_MODE, &mode); + + /* For loading, all the engines to load mode */ + lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); + usleep_range(1000, 10000); + lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_LOAD); + usleep_range(1000, 10000); + + addr = LP5521_PROG_MEM_BASE + eng->prog_page * LP5521_PROG_MEM_SIZE; + i2c_smbus_write_i2c_block_data(client, + addr, + LP5521_PROG_MEM_SIZE, + pattern); + + ret |= lp5521_write(client, LP5521_REG_OP_MODE, mode); + return ret; +} + +static int lp5521_set_led_current(struct lp5521_chip *chip, int led, u8 curr) +{ + return lp5521_write(chip->client, + LP5521_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr, + curr); +} + +static void lp5521_init_engine(struct lp5521_chip *chip, + const struct attribute_group *attr_group) +{ + int i; + for (i = 0; i < ARRAY_SIZE(chip->engines); i++) { + chip->engines[i].id = i + 1; + chip->engines[i].engine_mask = LP5521_ENG_MASK_BASE >> (i * 2); + chip->engines[i].prog_page = i; + chip->engines[i].attributes = &attr_group[i]; + } +} + +static int lp5521_configure(struct i2c_client *client, + const struct attribute_group *attr_group) +{ + struct lp5521_chip *chip = i2c_get_clientdata(client); + int ret; + + lp5521_init_engine(chip, attr_group); + + lp5521_write(client, LP5521_REG_RESET, 0xff); + + usleep_range(10000, 20000); + + /* Set all PWMs to direct control mode */ + ret = lp5521_write(client, LP5521_REG_OP_MODE, 0x3F); + + /* Enable auto-powersave, set charge pump to auto, red to battery */ + ret |= lp5521_write(client, LP5521_REG_CONFIG, + LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT); + + /* Initialize all channels PWM to zero -> leds off */ + ret |= lp5521_write(client, LP5521_REG_R_PWM, 0); + ret |= lp5521_write(client, LP5521_REG_G_PWM, 0); + ret |= lp5521_write(client, LP5521_REG_B_PWM, 0); + + /* Set engines are set to run state when OP_MODE enables engines */ + ret |= lp5521_write(client, LP5521_REG_ENABLE, + LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM | + LP5521_EXEC_RUN); + /* enable takes 500us */ + usleep_range(500, 20000); + + return ret; +} + +static int lp5521_run_selftest(struct lp5521_chip *chip, char *buf) +{ + int ret; + u8 status; + + ret = lp5521_read(chip->client, LP5521_REG_STATUS, &status); + if (ret < 0) + return ret; + + /* Check that ext clock is really in use if requested */ + if (chip->pdata && chip->pdata->clock_mode == LP5521_CLOCK_EXT) + if ((status & LP5521_EXT_CLK_USED) == 0) + return -EIO; + return 0; +} + +static void lp5521_set_brightness(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lp5521_led *led = cdev_to_led(cdev); + led->brightness = (u8)brightness; + schedule_work(&led->brightness_work); +} + +static void lp5521_led_brightness_work(struct work_struct *work) +{ + struct lp5521_led *led = container_of(work, + struct lp5521_led, + brightness_work); + struct lp5521_chip *chip = led_to_lp5521(led); + struct i2c_client *client = chip->client; + + mutex_lock(&chip->lock); + lp5521_write(client, LP5521_REG_LED_PWM_BASE + led->chan_nr, + led->brightness); + mutex_unlock(&chip->lock); +} + +/* Detect the chip by setting its ENABLE register and reading it back. */ +static int lp5521_detect(struct i2c_client *client) +{ + int ret; + u8 buf; + + ret = lp5521_write(client, LP5521_REG_ENABLE, + LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM); + if (ret) + return ret; + usleep_range(1000, 10000); + ret = lp5521_read(client, LP5521_REG_ENABLE, &buf); + if (ret) + return ret; + if (buf != (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM)) + return -ENODEV; + + return 0; +} + +/* Set engine mode and create appropriate sysfs attributes, if required. */ +static int lp5521_set_mode(struct lp5521_engine *engine, u8 mode) +{ + struct lp5521_chip *chip = engine_to_lp5521(engine); + struct i2c_client *client = chip->client; + struct device *dev = &client->dev; + int ret = 0; + + /* if in that mode already do nothing, except for run */ + if (mode == engine->mode && mode != LP5521_CMD_RUN) + return 0; + + if (mode == LP5521_CMD_RUN) { + ret = lp5521_set_engine_mode(engine, LP5521_CMD_RUN); + } else if (mode == LP5521_CMD_LOAD) { + lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED); + lp5521_set_engine_mode(engine, LP5521_CMD_LOAD); + + ret = sysfs_create_group(&dev->kobj, engine->attributes); + if (ret) + return ret; + } else if (mode == LP5521_CMD_DISABLED) { + lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED); + } + + /* remove load attribute from sysfs if not in load mode */ + if (engine->mode == LP5521_CMD_LOAD && mode != LP5521_CMD_LOAD) + sysfs_remove_group(&dev->kobj, engine->attributes); + + engine->mode = mode; + + return ret; +} + +static int lp5521_do_store_load(struct lp5521_engine *engine, + const char *buf, size_t len) +{ + struct lp5521_chip *chip = engine_to_lp5521(engine); + struct i2c_client *client = chip->client; + int ret, nrchars, offset = 0, i = 0; + char c[3]; + unsigned cmd; + u8 pattern[LP5521_PROGRAM_LENGTH] = {0}; + + while ((offset < len - 1) && (i < LP5521_PROGRAM_LENGTH)) { + /* separate sscanfs because length is working only for %s */ + ret = sscanf(buf + offset, "%2s%n ", c, &nrchars); + ret = sscanf(c, "%2x", &cmd); + if (ret != 1) + goto fail; + pattern[i] = (u8)cmd; + + offset += nrchars; + i++; + } + + /* Each instruction is 16bit long. Check that length is even */ + if (i % 2) + goto fail; + + mutex_lock(&chip->lock); + ret = lp5521_load_program(engine, pattern); + mutex_unlock(&chip->lock); + + if (ret) { + dev_err(&client->dev, "failed loading pattern\n"); + return ret; + } + + return len; +fail: + dev_err(&client->dev, "wrong pattern format\n"); + return -EINVAL; +} + +static ssize_t store_engine_load(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5521_chip *chip = i2c_get_clientdata(client); + return lp5521_do_store_load(&chip->engines[nr - 1], buf, len); +} + +#define store_load(nr) \ +static ssize_t store_engine##nr##_load(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_engine_load(dev, attr, buf, len, nr); \ +} +store_load(1) +store_load(2) +store_load(3) + +static ssize_t show_engine_mode(struct device *dev, + struct device_attribute *attr, + char *buf, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5521_chip *chip = i2c_get_clientdata(client); + switch (chip->engines[nr - 1].mode) { + case LP5521_CMD_RUN: + return sprintf(buf, "run\n"); + case LP5521_CMD_LOAD: + return sprintf(buf, "load\n"); + case LP5521_CMD_DISABLED: + return sprintf(buf, "disabled\n"); + default: + return sprintf(buf, "disabled\n"); + } +} + +#define show_mode(nr) \ +static ssize_t show_engine##nr##_mode(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return show_engine_mode(dev, attr, buf, nr); \ +} +show_mode(1) +show_mode(2) +show_mode(3) + +static ssize_t store_engine_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5521_chip *chip = i2c_get_clientdata(client); + struct lp5521_engine *engine = &chip->engines[nr - 1]; + mutex_lock(&chip->lock); + + if (!strncmp(buf, "run", 3)) + lp5521_set_mode(engine, LP5521_CMD_RUN); + else if (!strncmp(buf, "load", 4)) + lp5521_set_mode(engine, LP5521_CMD_LOAD); + else if (!strncmp(buf, "disabled", 8)) + lp5521_set_mode(engine, LP5521_CMD_DISABLED); + + mutex_unlock(&chip->lock); + return len; +} + +#define store_mode(nr) \ +static ssize_t store_engine##nr##_mode(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_engine_mode(dev, attr, buf, len, nr); \ +} +store_mode(1) +store_mode(2) +store_mode(3) + +static ssize_t show_max_current(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct lp5521_led *led = cdev_to_led(led_cdev); + + return sprintf(buf, "%d\n", led->max_current); +} + +static ssize_t show_current(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct lp5521_led *led = cdev_to_led(led_cdev); + + return sprintf(buf, "%d\n", led->led_current); +} + +static ssize_t store_current(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct lp5521_led *led = cdev_to_led(led_cdev); + struct lp5521_chip *chip = led_to_lp5521(led); + ssize_t ret; + unsigned long curr; + + if (strict_strtoul(buf, 0, &curr)) + return -EINVAL; + + if (curr > led->max_current) + return -EINVAL; + + mutex_lock(&chip->lock); + ret = lp5521_set_led_current(chip, led->id, curr); + mutex_unlock(&chip->lock); + + if (ret < 0) + return ret; + + led->led_current = (u8)curr; + + return len; +} + +static ssize_t lp5521_selftest(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5521_chip *chip = i2c_get_clientdata(client); + int ret; + + mutex_lock(&chip->lock); + ret = lp5521_run_selftest(chip, buf); + mutex_unlock(&chip->lock); + return sprintf(buf, "%s\n", ret ? "FAIL" : "OK"); +} + +/* led class device attributes */ +static DEVICE_ATTR(led_current, S_IRUGO | S_IWUGO, show_current, store_current); +static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL); + +static struct attribute *lp5521_led_attributes[] = { + &dev_attr_led_current.attr, + &dev_attr_max_current.attr, + NULL, +}; + +static struct attribute_group lp5521_led_attribute_group = { + .attrs = lp5521_led_attributes +}; + +/* device attributes */ +static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUGO, + show_engine1_mode, store_engine1_mode); +static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUGO, + show_engine2_mode, store_engine2_mode); +static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUGO, + show_engine3_mode, store_engine3_mode); +static DEVICE_ATTR(engine1_load, S_IWUGO, NULL, store_engine1_load); +static DEVICE_ATTR(engine2_load, S_IWUGO, NULL, store_engine2_load); +static DEVICE_ATTR(engine3_load, S_IWUGO, NULL, store_engine3_load); +static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL); + +static struct attribute *lp5521_attributes[] = { + &dev_attr_engine1_mode.attr, + &dev_attr_engine2_mode.attr, + &dev_attr_engine3_mode.attr, + &dev_attr_selftest.attr, + NULL +}; + +static struct attribute *lp5521_engine1_attributes[] = { + &dev_attr_engine1_load.attr, + NULL +}; + +static struct attribute *lp5521_engine2_attributes[] = { + &dev_attr_engine2_load.attr, + NULL +}; + +static struct attribute *lp5521_engine3_attributes[] = { + &dev_attr_engine3_load.attr, + NULL +}; + +static const struct attribute_group lp5521_group = { + .attrs = lp5521_attributes, +}; + +static const struct attribute_group lp5521_engine_group[] = { + {.attrs = lp5521_engine1_attributes }, + {.attrs = lp5521_engine2_attributes }, + {.attrs = lp5521_engine3_attributes }, +}; + +static int lp5521_register_sysfs(struct i2c_client *client) +{ + struct device *dev = &client->dev; + return sysfs_create_group(&dev->kobj, &lp5521_group); +} + +static void lp5521_unregister_sysfs(struct i2c_client *client) +{ + struct lp5521_chip *chip = i2c_get_clientdata(client); + struct device *dev = &client->dev; + int i; + + sysfs_remove_group(&dev->kobj, &lp5521_group); + + for (i = 0; i < ARRAY_SIZE(chip->engines); i++) { + if (chip->engines[i].mode == LP5521_CMD_LOAD) + sysfs_remove_group(&dev->kobj, + chip->engines[i].attributes); + } + + for (i = 0; i < chip->num_leds; i++) + sysfs_remove_group(&chip->leds[i].cdev.dev->kobj, + &lp5521_led_attribute_group); +} + +static int __init lp5521_init_led(struct lp5521_led *led, + struct i2c_client *client, + int chan, struct lp5521_platform_data *pdata) +{ + struct device *dev = &client->dev; + char name[32]; + int res; + + if (chan >= LP5521_MAX_LEDS) + return -EINVAL; + + if (pdata->led_config[chan].led_current == 0) + return 0; + + led->led_current = pdata->led_config[chan].led_current; + led->max_current = pdata->led_config[chan].max_current; + led->chan_nr = pdata->led_config[chan].chan_nr; + + if (led->chan_nr >= LP5521_MAX_LEDS) { + dev_err(dev, "Use channel numbers between 0 and %d\n", + LP5521_MAX_LEDS - 1); + return -EINVAL; + } + + snprintf(name, sizeof(name), "%s:channel%d", client->name, chan); + led->cdev.brightness_set = lp5521_set_brightness; + led->cdev.name = name; + res = led_classdev_register(dev, &led->cdev); + if (res < 0) { + dev_err(dev, "couldn't register led on channel %d\n", chan); + return res; + } + + res = sysfs_create_group(&led->cdev.dev->kobj, + &lp5521_led_attribute_group); + if (res < 0) { + dev_err(dev, "couldn't register current attribute\n"); + led_classdev_unregister(&led->cdev); + return res; + } + return 0; +} + +static int lp5521_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lp5521_chip *chip; + struct lp5521_platform_data *pdata; + int ret, i, led; + + chip = kzalloc(sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + i2c_set_clientdata(client, chip); + chip->client = client; + + pdata = client->dev.platform_data; + + if (!pdata) { + dev_err(&client->dev, "no platform data\n"); + ret = -EINVAL; + goto fail1; + } + + mutex_init(&chip->lock); + + chip->pdata = pdata; + + if (pdata->setup_resources) { + ret = pdata->setup_resources(); + if (ret < 0) + goto fail1; + } + + if (pdata->enable) { + pdata->enable(0); + usleep_range(1000, 10000); + pdata->enable(1); + usleep_range(1000, 10000); /* Spec says min 500us */ + } + + ret = lp5521_detect(client); + + if (ret) { + dev_err(&client->dev, "Chip not found\n"); + goto fail2; + } + + dev_info(&client->dev, "%s programmable led chip found\n", id->name); + + ret = lp5521_configure(client, lp5521_engine_group); + if (ret < 0) { + dev_err(&client->dev, "error configuring chip\n"); + goto fail2; + } + + /* Initialize leds */ + chip->num_channels = pdata->num_channels; + chip->num_leds = 0; + led = 0; + for (i = 0; i < pdata->num_channels; i++) { + /* Do not initialize channels that are not connected */ + if (pdata->led_config[i].led_current == 0) + continue; + + ret = lp5521_init_led(&chip->leds[led], client, i, pdata); + if (ret) { + dev_err(&client->dev, "error initializing leds\n"); + goto fail3; + } + chip->num_leds++; + + chip->leds[led].id = led; + /* Set initial LED current */ + lp5521_set_led_current(chip, led, + chip->leds[led].led_current); + + INIT_WORK(&(chip->leds[led].brightness_work), + lp5521_led_brightness_work); + + led++; + } + + ret = lp5521_register_sysfs(client); + if (ret) { + dev_err(&client->dev, "registering sysfs failed\n"); + goto fail3; + } + return ret; +fail3: + for (i = 0; i < chip->num_leds; i++) { + led_classdev_unregister(&chip->leds[i].cdev); + cancel_work_sync(&chip->leds[i].brightness_work); + } +fail2: + if (pdata->enable) + pdata->enable(0); + if (pdata->release_resources) + pdata->release_resources(); +fail1: + kfree(chip); + return ret; +} + +static int lp5521_remove(struct i2c_client *client) +{ + struct lp5521_chip *chip = i2c_get_clientdata(client); + int i; + + lp5521_unregister_sysfs(client); + + for (i = 0; i < chip->num_leds; i++) { + led_classdev_unregister(&chip->leds[i].cdev); + cancel_work_sync(&chip->leds[i].brightness_work); + } + + if (chip->pdata->enable) + chip->pdata->enable(0); + if (chip->pdata->release_resources) + chip->pdata->release_resources(); + kfree(chip); + return 0; +} + +static const struct i2c_device_id lp5521_id[] = { + { "lp5521", 0 }, /* Three channel chip */ + { } +}; +MODULE_DEVICE_TABLE(i2c, lp5521_id); + +static struct i2c_driver lp5521_driver = { + .driver = { + .name = "lp5521", + }, + .probe = lp5521_probe, + .remove = lp5521_remove, + .id_table = lp5521_id, +}; + +static int __init lp5521_init(void) +{ + int ret; + + ret = i2c_add_driver(&lp5521_driver); + + if (ret < 0) + printk(KERN_ALERT "Adding lp5521 driver failed\n"); + + return ret; +} + +static void __exit lp5521_exit(void) +{ + i2c_del_driver(&lp5521_driver); +} + +module_init(lp5521_init); +module_exit(lp5521_exit); + +MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo"); +MODULE_DESCRIPTION("LP5521 LED engine"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c new file mode 100644 index 000000000000..1e11fcc08b28 --- /dev/null +++ b/drivers/leds/leds-lp5523.c @@ -0,0 +1,1065 @@ +/* + * lp5523.c - LP5523 LED Driver + * + * Copyright (C) 2010 Nokia Corporation + * + * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/mutex.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/ctype.h> +#include <linux/spinlock.h> +#include <linux/wait.h> +#include <linux/leds.h> +#include <linux/leds-lp5523.h> +#include <linux/workqueue.h> +#include <linux/slab.h> + +#define LP5523_REG_ENABLE 0x00 +#define LP5523_REG_OP_MODE 0x01 +#define LP5523_REG_RATIOMETRIC_MSB 0x02 +#define LP5523_REG_RATIOMETRIC_LSB 0x03 +#define LP5523_REG_ENABLE_LEDS_MSB 0x04 +#define LP5523_REG_ENABLE_LEDS_LSB 0x05 +#define LP5523_REG_LED_CNTRL_BASE 0x06 +#define LP5523_REG_LED_PWM_BASE 0x16 +#define LP5523_REG_LED_CURRENT_BASE 0x26 +#define LP5523_REG_CONFIG 0x36 +#define LP5523_REG_CHANNEL1_PC 0x37 +#define LP5523_REG_CHANNEL2_PC 0x38 +#define LP5523_REG_CHANNEL3_PC 0x39 +#define LP5523_REG_STATUS 0x3a +#define LP5523_REG_GPO 0x3b +#define LP5523_REG_VARIABLE 0x3c +#define LP5523_REG_RESET 0x3d +#define LP5523_REG_TEMP_CTRL 0x3e +#define LP5523_REG_TEMP_READ 0x3f +#define LP5523_REG_TEMP_WRITE 0x40 +#define LP5523_REG_LED_TEST_CTRL 0x41 +#define LP5523_REG_LED_TEST_ADC 0x42 +#define LP5523_REG_ENG1_VARIABLE 0x45 +#define LP5523_REG_ENG2_VARIABLE 0x46 +#define LP5523_REG_ENG3_VARIABLE 0x47 +#define LP5523_REG_MASTER_FADER1 0x48 +#define LP5523_REG_MASTER_FADER2 0x49 +#define LP5523_REG_MASTER_FADER3 0x4a +#define LP5523_REG_CH1_PROG_START 0x4c +#define LP5523_REG_CH2_PROG_START 0x4d +#define LP5523_REG_CH3_PROG_START 0x4e +#define LP5523_REG_PROG_PAGE_SEL 0x4f +#define LP5523_REG_PROG_MEM 0x50 + +#define LP5523_CMD_LOAD 0x15 /* 00010101 */ +#define LP5523_CMD_RUN 0x2a /* 00101010 */ +#define LP5523_CMD_DISABLED 0x00 /* 00000000 */ + +#define LP5523_ENABLE 0x40 +#define LP5523_AUTO_INC 0x40 +#define LP5523_PWR_SAVE 0x20 +#define LP5523_PWM_PWR_SAVE 0x04 +#define LP5523_CP_1 0x08 +#define LP5523_CP_1_5 0x10 +#define LP5523_CP_AUTO 0x18 +#define LP5523_INT_CLK 0x01 +#define LP5523_AUTO_CLK 0x02 +#define LP5523_EN_LEDTEST 0x80 +#define LP5523_LEDTEST_DONE 0x80 + +#define LP5523_DEFAULT_CURRENT 50 /* microAmps */ +#define LP5523_PROGRAM_LENGTH 32 /* in bytes */ +#define LP5523_PROGRAM_PAGES 6 +#define LP5523_ADC_SHORTCIRC_LIM 80 + +#define LP5523_LEDS 9 +#define LP5523_ENGINES 3 + +#define LP5523_ENG_MASK_BASE 0x30 /* 00110000 */ + +#define LP5523_ENG_STATUS_MASK 0x07 /* 00000111 */ + +#define LP5523_IRQ_FLAGS IRQF_TRIGGER_FALLING + +#define LP5523_EXT_CLK_USED 0x08 + +#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led))) +#define SHIFT_MASK(id) (((id) - 1) * 2) + +struct lp5523_engine { + const struct attribute_group *attributes; + int id; + u8 mode; + u8 prog_page; + u8 mux_page; + u16 led_mux; + u8 engine_mask; +}; + +struct lp5523_led { + int id; + u8 chan_nr; + u8 led_current; + u8 max_current; + struct led_classdev cdev; + struct work_struct brightness_work; + u8 brightness; +}; + +struct lp5523_chip { + struct mutex lock; /* Serialize control */ + struct i2c_client *client; + struct lp5523_engine engines[LP5523_ENGINES]; + struct lp5523_led leds[LP5523_LEDS]; + struct lp5523_platform_data *pdata; + u8 num_channels; + u8 num_leds; +}; + +#define cdev_to_led(c) container_of(c, struct lp5523_led, cdev) + +static struct lp5523_chip *engine_to_lp5523(struct lp5523_engine *engine) +{ + return container_of(engine, struct lp5523_chip, + engines[engine->id - 1]); +} + +static struct lp5523_chip *led_to_lp5523(struct lp5523_led *led) +{ + return container_of(led, struct lp5523_chip, + leds[led->id]); +} + +static int lp5523_set_mode(struct lp5523_engine *engine, u8 mode); +static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode); +static int lp5523_load_program(struct lp5523_engine *engine, u8 *pattern); + +static void lp5523_led_brightness_work(struct work_struct *work); + +static int lp5523_write(struct i2c_client *client, u8 reg, u8 value) +{ + return i2c_smbus_write_byte_data(client, reg, value); +} + +static int lp5523_read(struct i2c_client *client, u8 reg, u8 *buf) +{ + s32 ret = i2c_smbus_read_byte_data(client, reg); + + if (ret < 0) + return -EIO; + + *buf = ret; + return 0; +} + +static int lp5523_detect(struct i2c_client *client) +{ + int ret; + u8 buf; + + ret = lp5523_write(client, LP5523_REG_ENABLE, 0x40); + if (ret) + return ret; + ret = lp5523_read(client, LP5523_REG_ENABLE, &buf); + if (ret) + return ret; + if (buf == 0x40) + return 0; + else + return -ENODEV; +} + +static int lp5523_configure(struct i2c_client *client) +{ + struct lp5523_chip *chip = i2c_get_clientdata(client); + int ret = 0; + u8 status; + + /* one pattern per engine setting led mux start and stop addresses */ + u8 pattern[][LP5523_PROGRAM_LENGTH] = { + { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, + { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, + { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, + }; + + lp5523_write(client, LP5523_REG_RESET, 0xff); + + usleep_range(10000, 100000); + + ret |= lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE); + /* Chip startup time after reset is 500 us */ + usleep_range(1000, 10000); + + ret |= lp5523_write(client, LP5523_REG_CONFIG, + LP5523_AUTO_INC | LP5523_PWR_SAVE | + LP5523_CP_AUTO | LP5523_AUTO_CLK | + LP5523_PWM_PWR_SAVE); + + /* turn on all leds */ + ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_MSB, 0x01); + ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_LSB, 0xff); + + /* hardcode 32 bytes of memory for each engine from program memory */ + ret |= lp5523_write(client, LP5523_REG_CH1_PROG_START, 0x00); + ret |= lp5523_write(client, LP5523_REG_CH2_PROG_START, 0x10); + ret |= lp5523_write(client, LP5523_REG_CH3_PROG_START, 0x20); + + /* write led mux address space for each channel */ + ret |= lp5523_load_program(&chip->engines[0], pattern[0]); + ret |= lp5523_load_program(&chip->engines[1], pattern[1]); + ret |= lp5523_load_program(&chip->engines[2], pattern[2]); + + if (ret) { + dev_err(&client->dev, "could not load mux programs\n"); + return -1; + } + + /* set all engines exec state and mode to run 00101010 */ + ret |= lp5523_write(client, LP5523_REG_ENABLE, + (LP5523_CMD_RUN | LP5523_ENABLE)); + + ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_RUN); + + if (ret) { + dev_err(&client->dev, "could not start mux programs\n"); + return -1; + } + + /* Wait 3ms and check the engine status */ + usleep_range(3000, 20000); + lp5523_read(client, LP5523_REG_STATUS, &status); + status &= LP5523_ENG_STATUS_MASK; + + if (status == LP5523_ENG_STATUS_MASK) { + dev_dbg(&client->dev, "all engines configured\n"); + } else { + dev_info(&client->dev, "status == %x\n", status); + dev_err(&client->dev, "cound not configure LED engine\n"); + return -1; + } + + dev_info(&client->dev, "disabling engines\n"); + + ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED); + + return ret; +} + +static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode) +{ + struct lp5523_chip *chip = engine_to_lp5523(engine); + struct i2c_client *client = chip->client; + int ret; + u8 engine_state; + + ret = lp5523_read(client, LP5523_REG_OP_MODE, &engine_state); + if (ret) + goto fail; + + engine_state &= ~(engine->engine_mask); + + /* set mode only for this engine */ + mode &= engine->engine_mask; + + engine_state |= mode; + + ret |= lp5523_write(client, LP5523_REG_OP_MODE, engine_state); +fail: + return ret; +} + +static int lp5523_load_mux(struct lp5523_engine *engine, u16 mux) +{ + struct lp5523_chip *chip = engine_to_lp5523(engine); + struct i2c_client *client = chip->client; + int ret = 0; + + ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD); + + ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL, engine->mux_page); + ret |= lp5523_write(client, LP5523_REG_PROG_MEM, + (u8)(mux >> 8)); + ret |= lp5523_write(client, LP5523_REG_PROG_MEM + 1, (u8)(mux)); + engine->led_mux = mux; + + return ret; +} + +static int lp5523_load_program(struct lp5523_engine *engine, u8 *pattern) +{ + struct lp5523_chip *chip = engine_to_lp5523(engine); + struct i2c_client *client = chip->client; + + int ret = 0; + + ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD); + + ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL, + engine->prog_page); + ret |= i2c_smbus_write_i2c_block_data(client, LP5523_REG_PROG_MEM, + LP5523_PROGRAM_LENGTH, pattern); + + return ret; +} + +static int lp5523_run_program(struct lp5523_engine *engine) +{ + struct lp5523_chip *chip = engine_to_lp5523(engine); + struct i2c_client *client = chip->client; + int ret; + + ret = lp5523_write(client, LP5523_REG_ENABLE, + LP5523_CMD_RUN | LP5523_ENABLE); + if (ret) + goto fail; + + ret = lp5523_set_engine_mode(engine, LP5523_CMD_RUN); +fail: + return ret; +} + +static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len) +{ + int i; + u16 tmp_mux = 0; + len = len < LP5523_LEDS ? len : LP5523_LEDS; + for (i = 0; i < len; i++) { + switch (buf[i]) { + case '1': + tmp_mux |= (1 << i); + break; + case '0': + break; + case '\n': + i = len; + break; + default: + return -1; + } + } + *mux = tmp_mux; + + return 0; +} + +static void lp5523_mux_to_array(u16 led_mux, char *array) +{ + int i, pos = 0; + for (i = 0; i < LP5523_LEDS; i++) + pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i)); + + array[pos] = '\0'; +} + +/*--------------------------------------------------------------*/ +/* Sysfs interface */ +/*--------------------------------------------------------------*/ + +static ssize_t show_engine_leds(struct device *dev, + struct device_attribute *attr, + char *buf, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5523_chip *chip = i2c_get_clientdata(client); + char mux[LP5523_LEDS + 1]; + + lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux); + + return sprintf(buf, "%s\n", mux); +} + +#define show_leds(nr) \ +static ssize_t show_engine##nr##_leds(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return show_engine_leds(dev, attr, buf, nr); \ +} +show_leds(1) +show_leds(2) +show_leds(3) + +static ssize_t store_engine_leds(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5523_chip *chip = i2c_get_clientdata(client); + u16 mux = 0; + + if (lp5523_mux_parse(buf, &mux, len)) + return -EINVAL; + + if (lp5523_load_mux(&chip->engines[nr - 1], mux)) + return -EINVAL; + + return len; +} + +#define store_leds(nr) \ +static ssize_t store_engine##nr##_leds(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_engine_leds(dev, attr, buf, len, nr); \ +} +store_leds(1) +store_leds(2) +store_leds(3) + +static ssize_t lp5523_selftest(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5523_chip *chip = i2c_get_clientdata(client); + int i, ret, pos = 0; + int led = 0; + u8 status, adc, vdd; + + mutex_lock(&chip->lock); + + ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status); + if (ret < 0) + goto fail; + + /* Check that ext clock is really in use if requested */ + if ((chip->pdata) && (chip->pdata->clock_mode == LP5523_CLOCK_EXT)) + if ((status & LP5523_EXT_CLK_USED) == 0) + goto fail; + + /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */ + lp5523_write(chip->client, LP5523_REG_LED_TEST_CTRL, + LP5523_EN_LEDTEST | 16); + usleep_range(3000, 10000); + ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status); + if (!(status & LP5523_LEDTEST_DONE)) + usleep_range(3000, 10000); + + ret |= lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &vdd); + vdd--; /* There may be some fluctuation in measurement */ + + for (i = 0; i < LP5523_LEDS; i++) { + /* Skip non-existing channels */ + if (chip->pdata->led_config[i].led_current == 0) + continue; + + /* Set default current */ + lp5523_write(chip->client, + LP5523_REG_LED_CURRENT_BASE + i, + chip->pdata->led_config[i].led_current); + + lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0xff); + /* let current stabilize 2ms before measurements start */ + usleep_range(2000, 10000); + lp5523_write(chip->client, + LP5523_REG_LED_TEST_CTRL, + LP5523_EN_LEDTEST | i); + /* ledtest takes 2.7ms */ + usleep_range(3000, 10000); + ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status); + if (!(status & LP5523_LEDTEST_DONE)) + usleep_range(3000, 10000); + ret |= lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &adc); + + if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) + pos += sprintf(buf + pos, "LED %d FAIL\n", i); + + lp5523_write(chip->client, LP5523_REG_LED_PWM_BASE + i, 0x00); + + /* Restore current */ + lp5523_write(chip->client, + LP5523_REG_LED_CURRENT_BASE + i, + chip->leds[led].led_current); + led++; + } + if (pos == 0) + pos = sprintf(buf, "OK\n"); + goto release_lock; +fail: + pos = sprintf(buf, "FAIL\n"); + +release_lock: + mutex_unlock(&chip->lock); + + return pos; +} + +static void lp5523_set_brightness(struct led_classdev *cdev, + enum led_brightness brightness) +{ + struct lp5523_led *led = cdev_to_led(cdev); + + led->brightness = (u8)brightness; + + schedule_work(&led->brightness_work); +} + +static void lp5523_led_brightness_work(struct work_struct *work) +{ + struct lp5523_led *led = container_of(work, + struct lp5523_led, + brightness_work); + struct lp5523_chip *chip = led_to_lp5523(led); + struct i2c_client *client = chip->client; + + mutex_lock(&chip->lock); + + lp5523_write(client, LP5523_REG_LED_PWM_BASE + led->chan_nr, + led->brightness); + + mutex_unlock(&chip->lock); +} + +static int lp5523_do_store_load(struct lp5523_engine *engine, + const char *buf, size_t len) +{ + struct lp5523_chip *chip = engine_to_lp5523(engine); + struct i2c_client *client = chip->client; + int ret, nrchars, offset = 0, i = 0; + char c[3]; + unsigned cmd; + u8 pattern[LP5523_PROGRAM_LENGTH] = {0}; + + while ((offset < len - 1) && (i < LP5523_PROGRAM_LENGTH)) { + /* separate sscanfs because length is working only for %s */ + ret = sscanf(buf + offset, "%2s%n ", c, &nrchars); + ret = sscanf(c, "%2x", &cmd); + if (ret != 1) + goto fail; + pattern[i] = (u8)cmd; + + offset += nrchars; + i++; + } + + /* Each instruction is 16bit long. Check that length is even */ + if (i % 2) + goto fail; + + mutex_lock(&chip->lock); + + ret = lp5523_load_program(engine, pattern); + mutex_unlock(&chip->lock); + + if (ret) { + dev_err(&client->dev, "failed loading pattern\n"); + return ret; + } + + return len; +fail: + dev_err(&client->dev, "wrong pattern format\n"); + return -EINVAL; +} + +static ssize_t store_engine_load(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5523_chip *chip = i2c_get_clientdata(client); + return lp5523_do_store_load(&chip->engines[nr - 1], buf, len); +} + +#define store_load(nr) \ +static ssize_t store_engine##nr##_load(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_engine_load(dev, attr, buf, len, nr); \ +} +store_load(1) +store_load(2) +store_load(3) + +static ssize_t show_engine_mode(struct device *dev, + struct device_attribute *attr, + char *buf, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5523_chip *chip = i2c_get_clientdata(client); + switch (chip->engines[nr - 1].mode) { + case LP5523_CMD_RUN: + return sprintf(buf, "run\n"); + case LP5523_CMD_LOAD: + return sprintf(buf, "load\n"); + case LP5523_CMD_DISABLED: + return sprintf(buf, "disabled\n"); + default: + return sprintf(buf, "disabled\n"); + } +} + +#define show_mode(nr) \ +static ssize_t show_engine##nr##_mode(struct device *dev, \ + struct device_attribute *attr, \ + char *buf) \ +{ \ + return show_engine_mode(dev, attr, buf, nr); \ +} +show_mode(1) +show_mode(2) +show_mode(3) + +static ssize_t store_engine_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len, int nr) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lp5523_chip *chip = i2c_get_clientdata(client); + struct lp5523_engine *engine = &chip->engines[nr - 1]; + mutex_lock(&chip->lock); + + if (!strncmp(buf, "run", 3)) + lp5523_set_mode(engine, LP5523_CMD_RUN); + else if (!strncmp(buf, "load", 4)) + lp5523_set_mode(engine, LP5523_CMD_LOAD); + else if (!strncmp(buf, "disabled", 8)) + lp5523_set_mode(engine, LP5523_CMD_DISABLED); + + mutex_unlock(&chip->lock); + return len; +} + +#define store_mode(nr) \ +static ssize_t store_engine##nr##_mode(struct device *dev, \ + struct device_attribute *attr, \ + const char *buf, size_t len) \ +{ \ + return store_engine_mode(dev, attr, buf, len, nr); \ +} +store_mode(1) +store_mode(2) +store_mode(3) + +static ssize_t show_max_current(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct lp5523_led *led = cdev_to_led(led_cdev); + + return sprintf(buf, "%d\n", led->max_current); +} + +static ssize_t show_current(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct lp5523_led *led = cdev_to_led(led_cdev); + + return sprintf(buf, "%d\n", led->led_current); +} + +static ssize_t store_current(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct lp5523_led *led = cdev_to_led(led_cdev); + struct lp5523_chip *chip = led_to_lp5523(led); + ssize_t ret; + unsigned long curr; + + if (strict_strtoul(buf, 0, &curr)) + return -EINVAL; + + if (curr > led->max_current) + return -EINVAL; + + mutex_lock(&chip->lock); + ret = lp5523_write(chip->client, + LP5523_REG_LED_CURRENT_BASE + led->chan_nr, + (u8)curr); + mutex_unlock(&chip->lock); + + if (ret < 0) + return ret; + + led->led_current = (u8)curr; + + return len; +} + +/* led class device attributes */ +static DEVICE_ATTR(led_current, S_IRUGO | S_IWUGO, show_current, store_current); +static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL); + +static struct attribute *lp5523_led_attributes[] = { + &dev_attr_led_current.attr, + &dev_attr_max_current.attr, + NULL, +}; + +static struct attribute_group lp5523_led_attribute_group = { + .attrs = lp5523_led_attributes +}; + +/* device attributes */ +static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUGO, + show_engine1_mode, store_engine1_mode); +static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUGO, + show_engine2_mode, store_engine2_mode); +static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUGO, + show_engine3_mode, store_engine3_mode); +static DEVICE_ATTR(engine1_leds, S_IRUGO | S_IWUGO, + show_engine1_leds, store_engine1_leds); +static DEVICE_ATTR(engine2_leds, S_IRUGO | S_IWUGO, + show_engine2_leds, store_engine2_leds); +static DEVICE_ATTR(engine3_leds, S_IRUGO | S_IWUGO, + show_engine3_leds, store_engine3_leds); +static DEVICE_ATTR(engine1_load, S_IWUGO, NULL, store_engine1_load); +static DEVICE_ATTR(engine2_load, S_IWUGO, NULL, store_engine2_load); +static DEVICE_ATTR(engine3_load, S_IWUGO, NULL, store_engine3_load); +static DEVICE_ATTR(selftest, S_IRUGO, lp5523_selftest, NULL); + +static struct attribute *lp5523_attributes[] = { + &dev_attr_engine1_mode.attr, + &dev_attr_engine2_mode.attr, + &dev_attr_engine3_mode.attr, + &dev_attr_selftest.attr, + NULL +}; + +static struct attribute *lp5523_engine1_attributes[] = { + &dev_attr_engine1_load.attr, + &dev_attr_engine1_leds.attr, + NULL +}; + +static struct attribute *lp5523_engine2_attributes[] = { + &dev_attr_engine2_load.attr, + &dev_attr_engine2_leds.attr, + NULL +}; + +static struct attribute *lp5523_engine3_attributes[] = { + &dev_attr_engine3_load.attr, + &dev_attr_engine3_leds.attr, + NULL +}; + +static const struct attribute_group lp5523_group = { + .attrs = lp5523_attributes, +}; + +static const struct attribute_group lp5523_engine_group[] = { + {.attrs = lp5523_engine1_attributes }, + {.attrs = lp5523_engine2_attributes }, + {.attrs = lp5523_engine3_attributes }, +}; + +static int lp5523_register_sysfs(struct i2c_client *client) +{ + struct device *dev = &client->dev; + int ret; + + ret = sysfs_create_group(&dev->kobj, &lp5523_group); + if (ret < 0) + return ret; + + return 0; +} + +static void lp5523_unregister_sysfs(struct i2c_client *client) +{ + struct lp5523_chip *chip = i2c_get_clientdata(client); + struct device *dev = &client->dev; + int i; + + sysfs_remove_group(&dev->kobj, &lp5523_group); + + for (i = 0; i < ARRAY_SIZE(chip->engines); i++) + if (chip->engines[i].mode == LP5523_CMD_LOAD) + sysfs_remove_group(&dev->kobj, &lp5523_engine_group[i]); + + for (i = 0; i < chip->num_leds; i++) + sysfs_remove_group(&chip->leds[i].cdev.dev->kobj, + &lp5523_led_attribute_group); +} + +/*--------------------------------------------------------------*/ +/* Set chip operating mode */ +/*--------------------------------------------------------------*/ +static int lp5523_set_mode(struct lp5523_engine *engine, u8 mode) +{ + /* engine to chip */ + struct lp5523_chip *chip = engine_to_lp5523(engine); + struct i2c_client *client = chip->client; + struct device *dev = &client->dev; + int ret = 0; + + /* if in that mode already do nothing, except for run */ + if (mode == engine->mode && mode != LP5523_CMD_RUN) + return 0; + + if (mode == LP5523_CMD_RUN) { + ret = lp5523_run_program(engine); + } else if (mode == LP5523_CMD_LOAD) { + lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED); + lp5523_set_engine_mode(engine, LP5523_CMD_LOAD); + + ret = sysfs_create_group(&dev->kobj, engine->attributes); + if (ret) + return ret; + } else if (mode == LP5523_CMD_DISABLED) { + lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED); + } + + /* remove load attribute from sysfs if not in load mode */ + if (engine->mode == LP5523_CMD_LOAD && mode != LP5523_CMD_LOAD) + sysfs_remove_group(&dev->kobj, engine->attributes); + + engine->mode = mode; + + return ret; +} + +/*--------------------------------------------------------------*/ +/* Probe, Attach, Remove */ +/*--------------------------------------------------------------*/ +static int __init lp5523_init_engine(struct lp5523_engine *engine, int id) +{ + if (id < 1 || id > LP5523_ENGINES) + return -1; + engine->id = id; + engine->engine_mask = LP5523_ENG_MASK_BASE >> SHIFT_MASK(id); + engine->prog_page = id - 1; + engine->mux_page = id + 2; + engine->attributes = &lp5523_engine_group[id - 1]; + + return 0; +} + +static int __init lp5523_init_led(struct lp5523_led *led, struct device *dev, + int chan, struct lp5523_platform_data *pdata) +{ + char name[32]; + int res; + + if (chan >= LP5523_LEDS) + return -EINVAL; + + if (pdata->led_config[chan].led_current) { + led->led_current = pdata->led_config[chan].led_current; + led->max_current = pdata->led_config[chan].max_current; + led->chan_nr = pdata->led_config[chan].chan_nr; + + if (led->chan_nr >= LP5523_LEDS) { + dev_err(dev, "Use channel numbers between 0 and %d\n", + LP5523_LEDS - 1); + return -EINVAL; + } + + snprintf(name, 32, "lp5523:channel%d", chan); + + led->cdev.name = name; + led->cdev.brightness_set = lp5523_set_brightness; + res = led_classdev_register(dev, &led->cdev); + if (res < 0) { + dev_err(dev, "couldn't register led on channel %d\n", + chan); + return res; + } + res = sysfs_create_group(&led->cdev.dev->kobj, + &lp5523_led_attribute_group); + if (res < 0) { + dev_err(dev, "couldn't register current attribute\n"); + led_classdev_unregister(&led->cdev); + return res; + } + } else { + led->led_current = 0; + } + return 0; +} + +static struct i2c_driver lp5523_driver; + +static int lp5523_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct lp5523_chip *chip; + struct lp5523_platform_data *pdata; + int ret, i, led; + + chip = kzalloc(sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + i2c_set_clientdata(client, chip); + chip->client = client; + + pdata = client->dev.platform_data; + + if (!pdata) { + dev_err(&client->dev, "no platform data\n"); + ret = -EINVAL; + goto fail1; + } + + mutex_init(&chip->lock); + + chip->pdata = pdata; + + if (pdata->setup_resources) { + ret = pdata->setup_resources(); + if (ret < 0) + goto fail1; + } + + if (pdata->enable) { + pdata->enable(0); + usleep_range(1000, 10000); + pdata->enable(1); + usleep_range(1000, 10000); /* Spec says min 500us */ + } + + ret = lp5523_detect(client); + if (ret) + goto fail2; + + dev_info(&client->dev, "LP5523 Programmable led chip found\n"); + + /* Initialize engines */ + for (i = 0; i < ARRAY_SIZE(chip->engines); i++) { + ret = lp5523_init_engine(&chip->engines[i], i + 1); + if (ret) { + dev_err(&client->dev, "error initializing engine\n"); + goto fail2; + } + } + ret = lp5523_configure(client); + if (ret < 0) { + dev_err(&client->dev, "error configuring chip\n"); + goto fail2; + } + + /* Initialize leds */ + chip->num_channels = pdata->num_channels; + chip->num_leds = 0; + led = 0; + for (i = 0; i < pdata->num_channels; i++) { + /* Do not initialize channels that are not connected */ + if (pdata->led_config[i].led_current == 0) + continue; + + ret = lp5523_init_led(&chip->leds[led], &client->dev, i, pdata); + if (ret) { + dev_err(&client->dev, "error initializing leds\n"); + goto fail3; + } + chip->num_leds++; + + chip->leds[led].id = led; + /* Set LED current */ + lp5523_write(client, + LP5523_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr, + chip->leds[led].led_current); + + INIT_WORK(&(chip->leds[led].brightness_work), + lp5523_led_brightness_work); + + led++; + } + + ret = lp5523_register_sysfs(client); + if (ret) { + dev_err(&client->dev, "registering sysfs failed\n"); + goto fail3; + } + return ret; +fail3: + for (i = 0; i < chip->num_leds; i++) { + led_classdev_unregister(&chip->leds[i].cdev); + cancel_work_sync(&chip->leds[i].brightness_work); + } +fail2: + if (pdata->enable) + pdata->enable(0); + if (pdata->release_resources) + pdata->release_resources(); +fail1: + kfree(chip); + return ret; +} + +static int lp5523_remove(struct i2c_client *client) +{ + struct lp5523_chip *chip = i2c_get_clientdata(client); + int i; + + lp5523_unregister_sysfs(client); + + for (i = 0; i < chip->num_leds; i++) { + led_classdev_unregister(&chip->leds[i].cdev); + cancel_work_sync(&chip->leds[i].brightness_work); + } + + if (chip->pdata->enable) + chip->pdata->enable(0); + if (chip->pdata->release_resources) + chip->pdata->release_resources(); + kfree(chip); + return 0; +} + +static const struct i2c_device_id lp5523_id[] = { + { "lp5523", 0 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, lp5523_id); + +static struct i2c_driver lp5523_driver = { + .driver = { + .name = "lp5523", + }, + .probe = lp5523_probe, + .remove = lp5523_remove, + .id_table = lp5523_id, +}; + +static int __init lp5523_init(void) +{ + int ret; + + ret = i2c_add_driver(&lp5523_driver); + + if (ret < 0) + printk(KERN_ALERT "Adding lp5523 driver failed\n"); + + return ret; +} + +static void __exit lp5523_exit(void) +{ + i2c_del_driver(&lp5523_driver); +} + +module_init(lp5523_init); +module_exit(lp5523_exit); + +MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>"); +MODULE_DESCRIPTION("LP5523 LED engine"); +MODULE_LICENSE("GPL"); diff --git a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c index 82b77bd482ff..b09bcbeade9c 100644 --- a/drivers/leds/ledtrig-timer.c +++ b/drivers/leds/ledtrig-timer.c @@ -12,73 +12,25 @@ */ #include <linux/module.h> -#include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/init.h> -#include <linux/list.h> -#include <linux/spinlock.h> #include <linux/device.h> -#include <linux/sysdev.h> -#include <linux/timer.h> #include <linux/ctype.h> #include <linux/leds.h> -#include <linux/slab.h> #include "leds.h" -struct timer_trig_data { - int brightness_on; /* LED brightness during "on" period. - * (LED_OFF < brightness_on <= LED_FULL) - */ - unsigned long delay_on; /* milliseconds on */ - unsigned long delay_off; /* milliseconds off */ - struct timer_list timer; -}; - -static void led_timer_function(unsigned long data) -{ - struct led_classdev *led_cdev = (struct led_classdev *) data; - struct timer_trig_data *timer_data = led_cdev->trigger_data; - unsigned long brightness; - unsigned long delay; - - if (!timer_data->delay_on || !timer_data->delay_off) { - led_set_brightness(led_cdev, LED_OFF); - return; - } - - brightness = led_get_brightness(led_cdev); - if (!brightness) { - /* Time to switch the LED on. */ - brightness = timer_data->brightness_on; - delay = timer_data->delay_on; - } else { - /* Store the current brightness value to be able - * to restore it when the delay_off period is over. - */ - timer_data->brightness_on = brightness; - brightness = LED_OFF; - delay = timer_data->delay_off; - } - - led_set_brightness(led_cdev, brightness); - - mod_timer(&timer_data->timer, jiffies + msecs_to_jiffies(delay)); -} - static ssize_t led_delay_on_show(struct device *dev, struct device_attribute *attr, char *buf) { struct led_classdev *led_cdev = dev_get_drvdata(dev); - struct timer_trig_data *timer_data = led_cdev->trigger_data; - return sprintf(buf, "%lu\n", timer_data->delay_on); + return sprintf(buf, "%lu\n", led_cdev->blink_delay_on); } static ssize_t led_delay_on_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct led_classdev *led_cdev = dev_get_drvdata(dev); - struct timer_trig_data *timer_data = led_cdev->trigger_data; int ret = -EINVAL; char *after; unsigned long state = simple_strtoul(buf, &after, 10); @@ -88,21 +40,7 @@ static ssize_t led_delay_on_store(struct device *dev, count++; if (count == size) { - if (timer_data->delay_on != state) { - /* the new value differs from the previous */ - timer_data->delay_on = state; - - /* deactivate previous settings */ - del_timer_sync(&timer_data->timer); - - /* try to activate hardware acceleration, if any */ - if (!led_cdev->blink_set || - led_cdev->blink_set(led_cdev, - &timer_data->delay_on, &timer_data->delay_off)) { - /* no hardware acceleration, blink via timer */ - mod_timer(&timer_data->timer, jiffies + 1); - } - } + led_blink_set(led_cdev, &state, &led_cdev->blink_delay_off); ret = count; } @@ -113,16 +51,14 @@ static ssize_t led_delay_off_show(struct device *dev, struct device_attribute *attr, char *buf) { struct led_classdev *led_cdev = dev_get_drvdata(dev); - struct timer_trig_data *timer_data = led_cdev->trigger_data; - return sprintf(buf, "%lu\n", timer_data->delay_off); + return sprintf(buf, "%lu\n", led_cdev->blink_delay_off); } static ssize_t led_delay_off_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct led_classdev *led_cdev = dev_get_drvdata(dev); - struct timer_trig_data *timer_data = led_cdev->trigger_data; int ret = -EINVAL; char *after; unsigned long state = simple_strtoul(buf, &after, 10); @@ -132,21 +68,7 @@ static ssize_t led_delay_off_store(struct device *dev, count++; if (count == size) { - if (timer_data->delay_off != state) { - /* the new value differs from the previous */ - timer_data->delay_off = state; - - /* deactivate previous settings */ - del_timer_sync(&timer_data->timer); - - /* try to activate hardware acceleration, if any */ - if (!led_cdev->blink_set || - led_cdev->blink_set(led_cdev, - &timer_data->delay_on, &timer_data->delay_off)) { - /* no hardware acceleration, blink via timer */ - mod_timer(&timer_data->timer, jiffies + 1); - } - } + led_blink_set(led_cdev, &led_cdev->blink_delay_on, &state); ret = count; } @@ -158,60 +80,34 @@ static DEVICE_ATTR(delay_off, 0644, led_delay_off_show, led_delay_off_store); static void timer_trig_activate(struct led_classdev *led_cdev) { - struct timer_trig_data *timer_data; int rc; - timer_data = kzalloc(sizeof(struct timer_trig_data), GFP_KERNEL); - if (!timer_data) - return; - - timer_data->brightness_on = led_get_brightness(led_cdev); - if (timer_data->brightness_on == LED_OFF) - timer_data->brightness_on = led_cdev->max_brightness; - led_cdev->trigger_data = timer_data; - - init_timer(&timer_data->timer); - timer_data->timer.function = led_timer_function; - timer_data->timer.data = (unsigned long) led_cdev; + led_cdev->trigger_data = NULL; rc = device_create_file(led_cdev->dev, &dev_attr_delay_on); if (rc) - goto err_out; + return; rc = device_create_file(led_cdev->dev, &dev_attr_delay_off); if (rc) goto err_out_delayon; - /* If there is hardware support for blinking, start one - * user friendly blink rate chosen by the driver. - */ - if (led_cdev->blink_set) - led_cdev->blink_set(led_cdev, - &timer_data->delay_on, &timer_data->delay_off); + led_cdev->trigger_data = (void *)1; return; err_out_delayon: device_remove_file(led_cdev->dev, &dev_attr_delay_on); -err_out: - led_cdev->trigger_data = NULL; - kfree(timer_data); } static void timer_trig_deactivate(struct led_classdev *led_cdev) { - struct timer_trig_data *timer_data = led_cdev->trigger_data; - unsigned long on = 0, off = 0; - - if (timer_data) { + if (led_cdev->trigger_data) { device_remove_file(led_cdev->dev, &dev_attr_delay_on); device_remove_file(led_cdev->dev, &dev_attr_delay_off); - del_timer_sync(&timer_data->timer); - kfree(timer_data); } - /* If there is hardware support for blinking, stop it */ - if (led_cdev->blink_set) - led_cdev->blink_set(led_cdev, &on, &off); + /* Stop blinking */ + led_brightness_set(led_cdev, LED_OFF); } static struct led_trigger timer_led_trigger = { diff --git a/drivers/macintosh/adb-iop.c b/drivers/macintosh/adb-iop.c index 444696625171..f5f4da3d0b67 100644 --- a/drivers/macintosh/adb-iop.c +++ b/drivers/macintosh/adb-iop.c @@ -80,7 +80,7 @@ static void adb_iop_end_req(struct adb_request *req, int state) static void adb_iop_complete(struct iop_msg *msg) { struct adb_request *req; - uint flags; + unsigned long flags; local_irq_save(flags); @@ -103,7 +103,7 @@ static void adb_iop_listen(struct iop_msg *msg) { struct adb_iopmsg *amsg = (struct adb_iopmsg *) msg->message; struct adb_request *req; - uint flags; + unsigned long flags; #ifdef DEBUG_ADB_IOP int i; #endif diff --git a/drivers/misc/apds9802als.c b/drivers/misc/apds9802als.c index f9b91ba8900c..0ed09358027e 100644 --- a/drivers/misc/apds9802als.c +++ b/drivers/misc/apds9802als.c @@ -123,7 +123,7 @@ static ssize_t als_sensing_range_store(struct device *dev, { struct i2c_client *client = to_i2c_client(dev); struct als_data *data = i2c_get_clientdata(client); - unsigned int ret_val; + int ret_val; unsigned long val; if (strict_strtoul(buf, 10, &val)) diff --git a/drivers/misc/bh1770glc.c b/drivers/misc/bh1770glc.c index cee632e645e1..d79a972f2c79 100644 --- a/drivers/misc/bh1770glc.c +++ b/drivers/misc/bh1770glc.c @@ -649,7 +649,7 @@ static ssize_t bh1770_power_state_store(struct device *dev, { struct bh1770_chip *chip = dev_get_drvdata(dev); unsigned long value; - size_t ret; + ssize_t ret; if (strict_strtoul(buf, 0, &value)) return -EINVAL; @@ -659,8 +659,12 @@ static ssize_t bh1770_power_state_store(struct device *dev, pm_runtime_get_sync(dev); ret = bh1770_lux_rate(chip, chip->lux_rate_index); - ret |= bh1770_lux_interrupt_control(chip, BH1770_ENABLE); + if (ret < 0) { + pm_runtime_put(dev); + goto leave; + } + ret = bh1770_lux_interrupt_control(chip, BH1770_ENABLE); if (ret < 0) { pm_runtime_put(dev); goto leave; diff --git a/drivers/misc/isl29020.c b/drivers/misc/isl29020.c index 34fe835921c4..ca47e6285075 100644 --- a/drivers/misc/isl29020.c +++ b/drivers/misc/isl29020.c @@ -87,7 +87,7 @@ static ssize_t als_sensing_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct i2c_client *client = to_i2c_client(dev); - unsigned int ret_val; + int ret_val; unsigned long val; if (strict_strtoul(buf, 10, &val)) @@ -106,6 +106,8 @@ static ssize_t als_sensing_range_store(struct device *dev, val = 4; ret_val = i2c_smbus_read_byte_data(client, 0x00); + if (ret_val < 0) + return ret_val; ret_val &= 0xFC; /*reset the bit before setting them */ ret_val |= val - 1; diff --git a/drivers/net/wireless/rt2x00/Kconfig b/drivers/net/wireless/rt2x00/Kconfig index eea1ef2f502b..4396d4b9bfb9 100644 --- a/drivers/net/wireless/rt2x00/Kconfig +++ b/drivers/net/wireless/rt2x00/Kconfig @@ -221,9 +221,6 @@ config RT2X00_LIB_LEDS boolean default y if (RT2X00_LIB=y && LEDS_CLASS=y) || (RT2X00_LIB=m && LEDS_CLASS!=n) -comment "rt2x00 leds support disabled due to modularized LEDS_CLASS and built-in rt2x00" - depends on RT2X00_LIB=y && LEDS_CLASS=m - config RT2X00_LIB_DEBUGFS bool "Ralink debugfs support" depends on RT2X00_LIB && MAC80211_DEBUGFS diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c index 68cf0c99138a..7b5080c45569 100644 --- a/drivers/rapidio/rio.c +++ b/drivers/rapidio/rio.c @@ -1159,11 +1159,11 @@ int __devinit rio_init_mports(void) list_for_each_entry(port, &rio_mports, node) { if (!request_mem_region(port->iores.start, - port->iores.end - port->iores.start, + resource_size(&port->iores), port->name)) { printk(KERN_ERR "RIO: Error requesting master port region 0x%016llx-0x%016llx\n", - (u64)port->iores.start, (u64)port->iores.end - 1); + (u64)port->iores.start, (u64)port->iores.end); rc = -ENOMEM; goto out; } diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c index 3ec24609151e..734c650a47c4 100644 --- a/drivers/video/backlight/adp8860_bl.c +++ b/drivers/video/backlight/adp8860_bl.c @@ -502,8 +502,10 @@ static ssize_t adp8860_bl_l1_daylight_max_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct adp8860_bl *data = dev_get_drvdata(dev); + int ret = strict_strtoul(buf, 10, &data->cached_daylight_max); + if (ret) + return ret; - strict_strtoul(buf, 10, &data->cached_daylight_max); return adp8860_store(dev, buf, count, ADP8860_BLMX1); } static DEVICE_ATTR(l1_daylight_max, 0664, adp8860_bl_l1_daylight_max_show, @@ -614,7 +616,7 @@ static ssize_t adp8860_bl_ambient_light_zone_store(struct device *dev, if (val == 0) { /* Enable automatic ambient light sensing */ adp8860_set_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); - } else if ((val > 0) && (val < 6)) { + } else if ((val > 0) && (val <= 3)) { /* Disable automatic ambient light sensing */ adp8860_clr_bits(data->client, ADP8860_MDCR, CMP_AUTOEN); @@ -622,7 +624,7 @@ static ssize_t adp8860_bl_ambient_light_zone_store(struct device *dev, mutex_lock(&data->lock); adp8860_read(data->client, ADP8860_CFGR, ®_val); reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); - reg_val |= val << CFGR_BLV_SHIFT; + reg_val |= (val - 1) << CFGR_BLV_SHIFT; adp8860_write(data->client, ADP8860_CFGR, reg_val); mutex_unlock(&data->lock); } diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c index 9093ef0fa869..c67801e57aaf 100644 --- a/drivers/video/backlight/l4f00242t03.c +++ b/drivers/video/backlight/l4f00242t03.c @@ -78,7 +78,7 @@ static int l4f00242t03_lcd_power_set(struct lcd_device *ld, int power) const u16 slpin = 0x10; const u16 disoff = 0x28; - if (power) { + if (power <= FB_BLANK_NORMAL) { if (priv->lcd_on) return 0; diff --git a/drivers/video/backlight/lms283gf05.c b/drivers/video/backlight/lms283gf05.c index abc43a0eb97d..5d3cf33953ac 100644 --- a/drivers/video/backlight/lms283gf05.c +++ b/drivers/video/backlight/lms283gf05.c @@ -129,7 +129,7 @@ static int lms283gf05_power_set(struct lcd_device *ld, int power) struct spi_device *spi = st->spi; struct lms283gf05_pdata *pdata = spi->dev.platform_data; - if (power) { + if (power <= FB_BLANK_NORMAL) { if (pdata) lms283gf05_reset(pdata->reset_gpio, pdata->reset_inverted); diff --git a/drivers/video/backlight/mbp_nvidia_bl.c b/drivers/video/backlight/mbp_nvidia_bl.c index 9fb533f6373e..1485f7345f49 100644 --- a/drivers/video/backlight/mbp_nvidia_bl.c +++ b/drivers/video/backlight/mbp_nvidia_bl.c @@ -335,6 +335,24 @@ static const struct dmi_system_id __initdata mbp_device_table[] = { }, .driver_data = (void *)&nvidia_chipset_data, }, + { + .callback = mbp_dmi_match, + .ident = "MacBookAir 3,1", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir3,1"), + }, + .driver_data = (void *)&nvidia_chipset_data, + }, + { + .callback = mbp_dmi_match, + .ident = "MacBookAir 3,2", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "MacBookAir3,2"), + }, + .driver_data = (void *)&nvidia_chipset_data, + }, { } }; diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 550443518891..21866ec69656 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -25,6 +25,7 @@ struct pwm_bl_data { struct pwm_device *pwm; struct device *dev; unsigned int period; + unsigned int lth_brightness; int (*notify)(struct device *, int brightness); }; @@ -48,7 +49,9 @@ static int pwm_backlight_update_status(struct backlight_device *bl) pwm_config(pb->pwm, 0, pb->period); pwm_disable(pb->pwm); } else { - pwm_config(pb->pwm, brightness * pb->period / max, pb->period); + brightness = pb->lth_brightness + + (brightness * (pb->period - pb->lth_brightness) / max); + pwm_config(pb->pwm, brightness, pb->period); pwm_enable(pb->pwm); } return 0; @@ -92,6 +95,8 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->period = data->pwm_period_ns; pb->notify = data->notify; + pb->lth_brightness = data->lth_brightness * + (data->pwm_period_ns / data->max_brightness); pb->dev = &pdev->dev; pb->pwm = pwm_request(data->pwm_id, "backlight"); diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c index a3128c9cb7ad..5927db0da999 100644 --- a/drivers/video/backlight/s6e63m0.c +++ b/drivers/video/backlight/s6e63m0.c @@ -729,10 +729,10 @@ static ssize_t s6e63m0_sysfs_show_gamma_table(struct device *dev, return strlen(buf); } -static DEVICE_ATTR(gamma_table, 0644, +static DEVICE_ATTR(gamma_table, 0444, s6e63m0_sysfs_show_gamma_table, NULL); -static int __init s6e63m0_probe(struct spi_device *spi) +static int __devinit s6e63m0_probe(struct spi_device *spi) { int ret = 0; struct s6e63m0 *lcd = NULL; @@ -829,6 +829,9 @@ static int __devexit s6e63m0_remove(struct spi_device *spi) struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev); s6e63m0_power(lcd, FB_BLANK_POWERDOWN); + device_remove_file(&spi->dev, &dev_attr_gamma_table); + device_remove_file(&spi->dev, &dev_attr_gamma_mode); + backlight_device_unregister(lcd->bd); lcd_device_unregister(lcd->ld); kfree(lcd); diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 39869c3c3efb..ef3a55bf86b6 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -2177,7 +2177,6 @@ cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) setattr_copy(inode, attrs); mark_inode_dirty(inode); - return 0; cifs_setattr_exit: kfree(full_path); diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index 2fa22f20cfc5..0c98672d0122 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -38,10 +38,10 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) struct cifs_sb_info *cifs_sb; #ifdef CONFIG_CIFS_POSIX struct cifsFileInfo *pSMBFile = filep->private_data; - struct cifsTconInfo *tcon = tlink_tcon(pSMBFile->tlink); + struct cifsTconInfo *tcon; __u64 ExtAttrBits = 0; __u64 ExtAttrMask = 0; - __u64 caps = le64_to_cpu(tcon->fsUnixInfo.Capability); + __u64 caps; #endif /* CONFIG_CIFS_POSIX */ xid = GetXid(); @@ -62,6 +62,10 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) break; #ifdef CONFIG_CIFS_POSIX case FS_IOC_GETFLAGS: + if (pSMBFile == NULL) + break; + tcon = tlink_tcon(pSMBFile->tlink); + caps = le64_to_cpu(tcon->fsUnixInfo.Capability); if (CIFS_UNIX_EXTATTR_CAP & caps) { rc = CIFSGetExtAttr(xid, tcon, pSMBFile->netfid, &ExtAttrBits, &ExtAttrMask); @@ -73,6 +77,10 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) break; case FS_IOC_SETFLAGS: + if (pSMBFile == NULL) + break; + tcon = tlink_tcon(pSMBFile->tlink); + caps = le64_to_cpu(tcon->fsUnixInfo.Capability); if (CIFS_UNIX_EXTATTR_CAP & caps) { if (get_user(ExtAttrBits, (int __user *)arg)) { rc = -EFAULT; diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index d6cfac1f0a40..a5fe68189eed 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -932,8 +932,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag, if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) { *user = current_user(); if (user_shm_lock(size, *user)) { - WARN_ONCE(1, - "Using mlock ulimits for SHM_HUGETLB deprecated\n"); + printk_once(KERN_WARNING "Using mlock ulimits for SHM_HUGETLB is deprecated\n"); } else { *user = NULL; return ERR_PTR(-EPERM); diff --git a/fs/locks.c b/fs/locks.c index 65765cb6afed..0e62dd35d088 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1504,9 +1504,8 @@ static int do_fcntl_delete_lease(struct file *filp) static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg) { - struct file_lock *fl; + struct file_lock *fl, *ret; struct fasync_struct *new; - struct inode *inode = filp->f_path.dentry->d_inode; int error; fl = lease_alloc(filp, arg); @@ -1518,13 +1517,16 @@ static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg) locks_free_lock(fl); return -ENOMEM; } + ret = fl; lock_flocks(); - error = __vfs_setlease(filp, arg, &fl); + error = __vfs_setlease(filp, arg, &ret); if (error) { unlock_flocks(); locks_free_lock(fl); goto out_free_fasync; } + if (ret != fl) + locks_free_lock(fl); /* * fasync_insert_entry() returns the old entry if any. @@ -1532,17 +1534,10 @@ static int do_fcntl_add_lease(unsigned int fd, struct file *filp, long arg) * inserted it into the fasync list. Clear new so that * we don't release it here. */ - if (!fasync_insert_entry(fd, filp, &fl->fl_fasync, new)) + if (!fasync_insert_entry(fd, filp, &ret->fl_fasync, new)) new = NULL; - if (error < 0) { - /* remove lease just inserted by setlease */ - fl->fl_type = F_UNLCK | F_INPROGRESS; - fl->fl_break_time = jiffies - 10; - time_out_leases(inode); - } else { - error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0); - } + error = __f_setown(filp, task_pid(current), PIDTYPE_PID, 0); unlock_flocks(); out_free_fasync: diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index f1e5ec6b5105..ad2bfa68d534 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -673,16 +673,17 @@ static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) spin_unlock(&clp->cl_lock); } -static void nfsd4_register_conn(struct nfsd4_conn *conn) +static int nfsd4_register_conn(struct nfsd4_conn *conn) { conn->cn_xpt_user.callback = nfsd4_conn_lost; - register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); + return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); } static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses) { struct nfsd4_conn *conn; u32 flags = NFS4_CDFC4_FORE; + int ret; if (ses->se_flags & SESSION4_BACK_CHAN) flags |= NFS4_CDFC4_BACK; @@ -690,7 +691,10 @@ static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses) if (!conn) return nfserr_jukebox; nfsd4_hash_conn(conn, ses); - nfsd4_register_conn(conn); + ret = nfsd4_register_conn(conn); + if (ret) + /* oops; xprt is already down: */ + nfsd4_conn_lost(&conn->cn_xpt_user); return nfs_ok; } @@ -1644,6 +1648,7 @@ static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_sessi { struct nfs4_client *clp = ses->se_client; struct nfsd4_conn *c; + int ret; spin_lock(&clp->cl_lock); c = __nfsd4_find_conn(new->cn_xprt, ses); @@ -1654,7 +1659,10 @@ static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_sessi } __nfsd4_hash_conn(new, ses); spin_unlock(&clp->cl_lock); - nfsd4_register_conn(new); + ret = nfsd4_register_conn(new); + if (ret) + /* oops; xprt is already down: */ + nfsd4_conn_lost(&new->cn_xpt_user); return; } diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c index ddb1f41376e5..911e61f348fc 100644 --- a/fs/openpromfs/inode.c +++ b/fs/openpromfs/inode.c @@ -418,7 +418,7 @@ out_no_root: static struct dentry *openprom_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - return mount_single(fs_type, flags, data, openprom_fill_super) + return mount_single(fs_type, flags, data, openprom_fill_super); } static struct file_system_type openprom_fs_type = { diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c index c9af48fffcd7..7d287afccde5 100644 --- a/fs/xfs/linux-2.6/xfs_aops.c +++ b/fs/xfs/linux-2.6/xfs_aops.c @@ -1111,11 +1111,12 @@ xfs_vm_writepage( uptodate = 0; /* - * A hole may still be marked uptodate because discard_buffer - * leaves the flag set. + * set_page_dirty dirties all buffers in a page, independent + * of their state. The dirty state however is entirely + * meaningless for holes (!mapped && uptodate), so skip + * buffers covering holes here. */ if (!buffer_mapped(bh) && buffer_uptodate(bh)) { - ASSERT(!buffer_dirty(bh)); imap_valid = 0; continue; } diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index 63fd2c07cb57..aa1d353def29 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -1781,7 +1781,6 @@ xfs_buf_delwri_split( INIT_LIST_HEAD(list); spin_lock(dwlk); list_for_each_entry_safe(bp, n, dwq, b_list) { - trace_xfs_buf_delwri_split(bp, _RET_IP_); ASSERT(bp->b_flags & XBF_DELWRI); if (!XFS_BUF_ISPINNED(bp) && !xfs_buf_cond_lock(bp)) { @@ -1795,6 +1794,7 @@ xfs_buf_delwri_split( _XBF_RUN_QUEUES); bp->b_flags |= XBF_WRITE; list_move_tail(&bp->b_list, list); + trace_xfs_buf_delwri_split(bp, _RET_IP_); } else skipped++; } diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c index 2ea238f6d38e..ad442d9e392e 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl.c +++ b/fs/xfs/linux-2.6/xfs_ioctl.c @@ -416,7 +416,7 @@ xfs_attrlist_by_handle( if (IS_ERR(dentry)) return PTR_ERR(dentry); - kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); + kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL); if (!kbuf) goto out_dput; diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index 96107efc0c61..94d5fd6a2973 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -762,7 +762,8 @@ xfs_setup_inode( inode->i_state = I_NEW; inode_sb_list_add(inode); - insert_inode_hash(inode); + /* make the inode look hashed for the writeback code */ + hlist_add_fake(&inode->i_hash); inode->i_mode = ip->i_d.di_mode; inode->i_nlink = ip->i_d.di_nlink; diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index 9f3a78fe6ae4..064f964d4f3c 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -353,9 +353,6 @@ xfs_parseargs( mp->m_qflags &= ~XFS_OQUOTA_ENFD; } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { mp->m_flags |= XFS_MOUNT_DELAYLOG; - cmn_err(CE_WARN, - "Enabling EXPERIMENTAL delayed logging feature " - "- use at your own risk.\n"); } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { mp->m_flags &= ~XFS_MOUNT_DELAYLOG; } else if (!strcmp(this_char, "ihashsize")) { diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index 37d33254981d..afb0d7cfad1c 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -853,6 +853,7 @@ restart: if (trylock) { if (!mutex_trylock(&pag->pag_ici_reclaim_lock)) { skipped++; + xfs_perag_put(pag); continue; } first_index = pag->pag_ici_reclaim_cursor; diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c index 9b715dce5699..9124425b7f2f 100644 --- a/fs/xfs/xfs_filestream.c +++ b/fs/xfs/xfs_filestream.c @@ -744,9 +744,15 @@ xfs_filestream_new_ag( * If the file's parent directory is known, take its iolock in exclusive * mode to prevent two sibling files from racing each other to migrate * themselves and their parent to different AGs. + * + * Note that we lock the parent directory iolock inside the child + * iolock here. That's fine as we never hold both parent and child + * iolock in any other place. This is different from the ilock, + * which requires locking of the child after the parent for namespace + * operations. */ if (pip) - xfs_ilock(pip, XFS_IOLOCK_EXCL); + xfs_ilock(pip, XFS_IOLOCK_EXCL | XFS_IOLOCK_PARENT); /* * A new AG needs to be found for the file. If the file's parent diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index b1498ab5a399..19e9dfa1c254 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -275,6 +275,7 @@ xfs_free_perag( pag = radix_tree_delete(&mp->m_perag_tree, agno); spin_unlock(&mp->m_perag_lock); ASSERT(pag); + ASSERT(atomic_read(&pag->pag_ref) == 0); call_rcu(&pag->rcu_head, __xfs_free_perag); } } diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h index e0e64b113bd6..9bb6eda4cd21 100644 --- a/fs/xfs/xfs_quota.h +++ b/fs/xfs/xfs_quota.h @@ -346,8 +346,17 @@ xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid, #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta) #define xfs_trans_apply_dquot_deltas(tp) #define xfs_trans_unreserve_and_mod_dquots(tp) -#define xfs_trans_reserve_quota_nblks(tp, ip, nblks, ninos, flags) (0) -#define xfs_trans_reserve_quota_bydquots(tp, mp, u, g, nb, ni, fl) (0) +static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, + struct xfs_inode *ip, long nblks, long ninos, uint flags) +{ + return 0; +} +static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp, + struct xfs_mount *mp, struct xfs_dquot *udqp, + struct xfs_dquot *gdqp, long nblks, long nions, uint flags) +{ + return 0; +} #define xfs_qm_vop_create_dqattach(tp, ip, u, g) #define xfs_qm_vop_rename_dqattach(it) (0) #define xfs_qm_vop_chown(tp, ip, old, new) (NULL) @@ -357,11 +366,14 @@ xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid, #define xfs_qm_dqdetach(ip) #define xfs_qm_dqrele(d) #define xfs_qm_statvfs(ip, s) -#define xfs_qm_sync(mp, fl) (0) +static inline int xfs_qm_sync(struct xfs_mount *mp, int flags) +{ + return 0; +} #define xfs_qm_newmount(mp, a, b) (0) #define xfs_qm_mount_quotas(mp) #define xfs_qm_unmount(mp) -#define xfs_qm_unmount_quotas(mp) (0) +#define xfs_qm_unmount_quotas(mp) #endif /* CONFIG_XFS_QUOTA */ #define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \ diff --git a/include/linux/atomic.h b/include/linux/atomic.h new file mode 100644 index 000000000000..96c038e43d66 --- /dev/null +++ b/include/linux/atomic.h @@ -0,0 +1,37 @@ +#ifndef _LINUX_ATOMIC_H +#define _LINUX_ATOMIC_H +#include <asm/atomic.h> + +/** + * atomic_inc_not_zero_hint - increment if not null + * @v: pointer of type atomic_t + * @hint: probable value of the atomic before the increment + * + * This version of atomic_inc_not_zero() gives a hint of probable + * value of the atomic. This helps processor to not read the memory + * before doing the atomic read/modify/write cycle, lowering + * number of bus transactions on some arches. + * + * Returns: 0 if increment was not done, 1 otherwise. + */ +#ifndef atomic_inc_not_zero_hint +static inline int atomic_inc_not_zero_hint(atomic_t *v, int hint) +{ + int val, c = hint; + + /* sanity test, should be removed by compiler if hint is a constant */ + if (!hint) + return atomic_inc_not_zero(v); + + do { + val = atomic_cmpxchg(v, c, c + 1); + if (val == c) + return 1; + c = val; + } while (c); + + return 0; +} +#endif + +#endif /* _LINUX_ATOMIC_H */ diff --git a/include/linux/highmem.h b/include/linux/highmem.h index e9138198e823..b676c585574e 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -5,6 +5,7 @@ #include <linux/kernel.h> #include <linux/mm.h> #include <linux/uaccess.h> +#include <linux/hardirq.h> #include <asm/cacheflush.h> diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 450092c1e35f..fc3da9e4da19 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -60,7 +60,7 @@ extern const char linux_proc_banner[]; #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) #define roundup(x, y) ( \ { \ - typeof(y) __y = y; \ + const typeof(y) __y = y; \ (((x) + (__y - 1)) / __y) * __y; \ } \ ) @@ -293,6 +293,7 @@ extern bool printk_timed_ratelimit(unsigned long *caller_jiffies, unsigned int interval_msec); extern int printk_delay_msec; +extern int dmesg_restrict; /* * Print a one-time message (analogous to WARN_ONCE() et al): diff --git a/include/linux/leds-lp5521.h b/include/linux/leds-lp5521.h new file mode 100644 index 000000000000..38368d785f08 --- /dev/null +++ b/include/linux/leds-lp5521.h @@ -0,0 +1,47 @@ +/* + * LP5521 LED chip driver. + * + * Copyright (C) 2010 Nokia Corporation + * + * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#ifndef __LINUX_LP5521_H +#define __LINUX_LP5521_H + +/* See Documentation/leds/leds-lp5521.txt */ + +struct lp5521_led_config { + u8 chan_nr; + u8 led_current; /* mA x10, 0 if led is not connected */ + u8 max_current; +}; + +#define LP5521_CLOCK_AUTO 0 +#define LP5521_CLOCK_INT 1 +#define LP5521_CLOCK_EXT 2 + +struct lp5521_platform_data { + struct lp5521_led_config *led_config; + u8 num_channels; + u8 clock_mode; + int (*setup_resources)(void); + void (*release_resources)(void); + void (*enable)(bool state); +}; + +#endif /* __LINUX_LP5521_H */ diff --git a/include/linux/leds-lp5523.h b/include/linux/leds-lp5523.h new file mode 100644 index 000000000000..796747637b80 --- /dev/null +++ b/include/linux/leds-lp5523.h @@ -0,0 +1,47 @@ +/* + * LP5523 LED Driver + * + * Copyright (C) 2010 Nokia Corporation + * + * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#ifndef __LINUX_LP5523_H +#define __LINUX_LP5523_H + +/* See Documentation/leds/leds-lp5523.txt */ + +struct lp5523_led_config { + u8 chan_nr; + u8 led_current; /* mA x10, 0 if led is not connected */ + u8 max_current; +}; + +#define LP5523_CLOCK_AUTO 0 +#define LP5523_CLOCK_INT 1 +#define LP5523_CLOCK_EXT 2 + +struct lp5523_platform_data { + struct lp5523_led_config *led_config; + u8 num_channels; + u8 clock_mode; + int (*setup_resources)(void); + void (*release_resources)(void); + void (*enable)(bool state); +}; + +#endif /* __LINUX_LP5523_H */ diff --git a/include/linux/leds.h b/include/linux/leds.h index ba6986a11663..0f19df9e37b0 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -15,6 +15,7 @@ #include <linux/list.h> #include <linux/spinlock.h> #include <linux/rwsem.h> +#include <linux/timer.h> struct device; /* @@ -45,10 +46,14 @@ struct led_classdev { /* Get LED brightness level */ enum led_brightness (*brightness_get)(struct led_classdev *led_cdev); - /* Activate hardware accelerated blink, delays are in - * miliseconds and if none is provided then a sensible default - * should be chosen. The call can adjust the timings if it can't - * match the values specified exactly. */ + /* + * Activate hardware accelerated blink, delays are in milliseconds + * and if both are zero then a sensible default should be chosen. + * The call should adjust the timings in that case and if it can't + * match the values specified exactly. + * Deactivate blinking again when the brightness is set to a fixed + * value via the brightness_set() callback. + */ int (*blink_set)(struct led_classdev *led_cdev, unsigned long *delay_on, unsigned long *delay_off); @@ -57,6 +62,10 @@ struct led_classdev { struct list_head node; /* LED Device list */ const char *default_trigger; /* Trigger to use */ + unsigned long blink_delay_on, blink_delay_off; + struct timer_list blink_timer; + int blink_brightness; + #ifdef CONFIG_LEDS_TRIGGERS /* Protects the trigger data below */ struct rw_semaphore trigger_lock; @@ -73,6 +82,36 @@ extern void led_classdev_unregister(struct led_classdev *led_cdev); extern void led_classdev_suspend(struct led_classdev *led_cdev); extern void led_classdev_resume(struct led_classdev *led_cdev); +/** + * led_blink_set - set blinking with software fallback + * @led_cdev: the LED to start blinking + * @delay_on: the time it should be on (in ms) + * @delay_off: the time it should ble off (in ms) + * + * This function makes the LED blink, attempting to use the + * hardware acceleration if possible, but falling back to + * software blinking if there is no hardware blinking or if + * the LED refuses the passed values. + * + * Note that if software blinking is active, simply calling + * led_cdev->brightness_set() will not stop the blinking, + * use led_classdev_brightness_set() instead. + */ +extern void led_blink_set(struct led_classdev *led_cdev, + unsigned long *delay_on, + unsigned long *delay_off); +/** + * led_brightness_set - set LED brightness + * @led_cdev: the LED to set + * @brightness: the brightness to set it to + * + * Set an LED's brightness, and, if necessary, cancel the + * software blink timer that implements blinking when the + * hardware doesn't. + */ +extern void led_brightness_set(struct led_classdev *led_cdev, + enum led_brightness brightness); + /* * LED Triggers */ diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h index 01b3d759f1fc..e031e1a486d9 100644 --- a/include/linux/pwm_backlight.h +++ b/include/linux/pwm_backlight.h @@ -8,6 +8,7 @@ struct platform_pwm_backlight_data { int pwm_id; unsigned int max_brightness; unsigned int dft_brightness; + unsigned int lth_brightness; unsigned int pwm_period_ns; int (*init)(struct device *dev); int (*notify)(struct device *dev, int brightness); diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h index a39cbed9ee17..ab2baa5c4884 100644 --- a/include/linux/radix-tree.h +++ b/include/linux/radix-tree.h @@ -34,19 +34,13 @@ * needed for RCU lookups (because root->height is unreliable). The only * time callers need worry about this is when doing a lookup_slot under * RCU. + * + * Indirect pointer in fact is also used to tag the last pointer of a node + * when it is shrunk, before we rcu free the node. See shrink code for + * details. */ #define RADIX_TREE_INDIRECT_PTR 1 -#define RADIX_TREE_RETRY ((void *)-1UL) - -static inline void *radix_tree_ptr_to_indirect(void *ptr) -{ - return (void *)((unsigned long)ptr | RADIX_TREE_INDIRECT_PTR); -} -static inline void *radix_tree_indirect_to_ptr(void *ptr) -{ - return (void *)((unsigned long)ptr & ~RADIX_TREE_INDIRECT_PTR); -} #define radix_tree_indirect_to_ptr(ptr) \ radix_tree_indirect_to_ptr((void __force *)(ptr)) @@ -140,16 +134,29 @@ do { \ * removed. * * For use with radix_tree_lookup_slot(). Caller must hold tree at least read - * locked across slot lookup and dereference. More likely, will be used with - * radix_tree_replace_slot(), as well, so caller will hold tree write locked. + * locked across slot lookup and dereference. Not required if write lock is + * held (ie. items cannot be concurrently inserted). + * + * radix_tree_deref_retry must be used to confirm validity of the pointer if + * only the read lock is held. */ static inline void *radix_tree_deref_slot(void **pslot) { - void *ret = rcu_dereference(*pslot); - if (unlikely(radix_tree_is_indirect_ptr(ret))) - ret = RADIX_TREE_RETRY; - return ret; + return rcu_dereference(*pslot); } + +/** + * radix_tree_deref_retry - check radix_tree_deref_slot + * @arg: pointer returned by radix_tree_deref_slot + * Returns: 0 if retry is not required, otherwise retry is required + * + * radix_tree_deref_retry must be used with radix_tree_deref_slot. + */ +static inline int radix_tree_deref_retry(void *arg) +{ + return unlikely((unsigned long)arg & RADIX_TREE_INDIRECT_PTR); +} + /** * radix_tree_replace_slot - replace item in a slot * @pslot: pointer to slot, returned by radix_tree_lookup_slot diff --git a/include/linux/resource.h b/include/linux/resource.h index 88d36f9145ba..d01c96c1966e 100644 --- a/include/linux/resource.h +++ b/include/linux/resource.h @@ -2,6 +2,7 @@ #define _LINUX_RESOURCE_H #include <linux/time.h> +#include <linux/types.h> /* * Resource control/accounting header file for linux diff --git a/include/linux/sunrpc/svc_xprt.h b/include/linux/sunrpc/svc_xprt.h index bbdb680ffbe9..aea0d438e3c7 100644 --- a/include/linux/sunrpc/svc_xprt.h +++ b/include/linux/sunrpc/svc_xprt.h @@ -82,18 +82,28 @@ struct svc_xprt { struct net *xpt_net; }; -static inline void register_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u) +static inline void unregister_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u) { spin_lock(&xpt->xpt_lock); - list_add(&u->list, &xpt->xpt_users); + list_del_init(&u->list); spin_unlock(&xpt->xpt_lock); } -static inline void unregister_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u) +static inline int register_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u) { spin_lock(&xpt->xpt_lock); - list_del_init(&u->list); + if (test_bit(XPT_CLOSE, &xpt->xpt_flags)) { + /* + * The connection is about to be deleted soon (or, + * worse, may already be deleted--in which case we've + * already notified the xpt_users). + */ + spin_unlock(&xpt->xpt_lock); + return -ENOTCONN; + } + list_add(&u->list, &xpt->xpt_users); spin_unlock(&xpt->xpt_lock); + return 0; } int svc_reg_xprt_class(struct svc_xprt_class *); diff --git a/kernel/latencytop.c b/kernel/latencytop.c index 877fb306d415..17110a4a4fc2 100644 --- a/kernel/latencytop.c +++ b/kernel/latencytop.c @@ -194,14 +194,7 @@ __account_scheduler_latency(struct task_struct *tsk, int usecs, int inter) account_global_scheduler_latency(tsk, &lat); - /* - * short term hack; if we're > 32 we stop; future we recycle: - */ - tsk->latency_record_count++; - if (tsk->latency_record_count >= LT_SAVECOUNT) - goto out_unlock; - - for (i = 0; i < LT_SAVECOUNT; i++) { + for (i = 0; i < tsk->latency_record_count; i++) { struct latency_record *mylat; int same = 1; @@ -227,8 +220,14 @@ __account_scheduler_latency(struct task_struct *tsk, int usecs, int inter) } } + /* + * short term hack; if we're > 32 we stop; future we recycle: + */ + if (tsk->latency_record_count >= LT_SAVECOUNT) + goto out_unlock; + /* Allocated a new one: */ - i = tsk->latency_record_count; + i = tsk->latency_record_count++; memcpy(&tsk->latency_record[i], &lat, sizeof(struct latency_record)); out_unlock: diff --git a/kernel/printk.c b/kernel/printk.c index b2ebaee8c377..38e7d5868d60 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -261,6 +261,12 @@ static inline void boot_delay_msec(void) } #endif +#ifdef CONFIG_SECURITY_DMESG_RESTRICT +int dmesg_restrict = 1; +#else +int dmesg_restrict; +#endif + int do_syslog(int type, char __user *buf, int len, bool from_file) { unsigned i, j, limit, count; diff --git a/kernel/range.c b/kernel/range.c index 471b66acabb5..37fa9b99ad58 100644 --- a/kernel/range.c +++ b/kernel/range.c @@ -119,7 +119,7 @@ static int cmp_range(const void *x1, const void *x2) int clean_sort_range(struct range *range, int az) { - int i, j, k = az - 1, nr_range = 0; + int i, j, k = az - 1, nr_range = az; for (i = 0; i < k; i++) { if (range[i].end) diff --git a/kernel/sysctl.c b/kernel/sysctl.c index c33a1edb799f..b65bf634035e 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -704,6 +704,15 @@ static struct ctl_table kern_table[] = { }, #endif { + .procname = "dmesg_restrict", + .data = &dmesg_restrict, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = &zero, + .extra2 = &one, + }, + { .procname = "ngroups_max", .data = &ngroups_max, .maxlen = sizeof (int), diff --git a/lib/radix-tree.c b/lib/radix-tree.c index 6f412ab4c24f..5086bb962b4d 100644 --- a/lib/radix-tree.c +++ b/lib/radix-tree.c @@ -82,6 +82,16 @@ struct radix_tree_preload { }; static DEFINE_PER_CPU(struct radix_tree_preload, radix_tree_preloads) = { 0, }; +static inline void *ptr_to_indirect(void *ptr) +{ + return (void *)((unsigned long)ptr | RADIX_TREE_INDIRECT_PTR); +} + +static inline void *indirect_to_ptr(void *ptr) +{ + return (void *)((unsigned long)ptr & ~RADIX_TREE_INDIRECT_PTR); +} + static inline gfp_t root_gfp_mask(struct radix_tree_root *root) { return root->gfp_mask & __GFP_BITS_MASK; @@ -265,7 +275,7 @@ static int radix_tree_extend(struct radix_tree_root *root, unsigned long index) return -ENOMEM; /* Increase the height. */ - node->slots[0] = radix_tree_indirect_to_ptr(root->rnode); + node->slots[0] = indirect_to_ptr(root->rnode); /* Propagate the aggregated tag info into the new root */ for (tag = 0; tag < RADIX_TREE_MAX_TAGS; tag++) { @@ -276,7 +286,7 @@ static int radix_tree_extend(struct radix_tree_root *root, unsigned long index) newheight = root->height+1; node->height = newheight; node->count = 1; - node = radix_tree_ptr_to_indirect(node); + node = ptr_to_indirect(node); rcu_assign_pointer(root->rnode, node); root->height = newheight; } while (height > root->height); @@ -309,7 +319,7 @@ int radix_tree_insert(struct radix_tree_root *root, return error; } - slot = radix_tree_indirect_to_ptr(root->rnode); + slot = indirect_to_ptr(root->rnode); height = root->height; shift = (height-1) * RADIX_TREE_MAP_SHIFT; @@ -325,8 +335,7 @@ int radix_tree_insert(struct radix_tree_root *root, rcu_assign_pointer(node->slots[offset], slot); node->count++; } else - rcu_assign_pointer(root->rnode, - radix_tree_ptr_to_indirect(slot)); + rcu_assign_pointer(root->rnode, ptr_to_indirect(slot)); } /* Go a level down */ @@ -374,7 +383,7 @@ static void *radix_tree_lookup_element(struct radix_tree_root *root, return NULL; return is_slot ? (void *)&root->rnode : node; } - node = radix_tree_indirect_to_ptr(node); + node = indirect_to_ptr(node); height = node->height; if (index > radix_tree_maxindex(height)) @@ -393,7 +402,7 @@ static void *radix_tree_lookup_element(struct radix_tree_root *root, height--; } while (height > 0); - return is_slot ? (void *)slot:node; + return is_slot ? (void *)slot : indirect_to_ptr(node); } /** @@ -455,7 +464,7 @@ void *radix_tree_tag_set(struct radix_tree_root *root, height = root->height; BUG_ON(index > radix_tree_maxindex(height)); - slot = radix_tree_indirect_to_ptr(root->rnode); + slot = indirect_to_ptr(root->rnode); shift = (height - 1) * RADIX_TREE_MAP_SHIFT; while (height > 0) { @@ -509,7 +518,7 @@ void *radix_tree_tag_clear(struct radix_tree_root *root, shift = (height - 1) * RADIX_TREE_MAP_SHIFT; pathp->node = NULL; - slot = radix_tree_indirect_to_ptr(root->rnode); + slot = indirect_to_ptr(root->rnode); while (height > 0) { int offset; @@ -579,7 +588,7 @@ int radix_tree_tag_get(struct radix_tree_root *root, if (!radix_tree_is_indirect_ptr(node)) return (index == 0); - node = radix_tree_indirect_to_ptr(node); + node = indirect_to_ptr(node); height = node->height; if (index > radix_tree_maxindex(height)) @@ -666,7 +675,7 @@ unsigned long radix_tree_range_tag_if_tagged(struct radix_tree_root *root, } shift = (height - 1) * RADIX_TREE_MAP_SHIFT; - slot = radix_tree_indirect_to_ptr(root->rnode); + slot = indirect_to_ptr(root->rnode); /* * we fill the path from (root->height - 2) to 0, leaving the index at @@ -897,7 +906,7 @@ radix_tree_gang_lookup(struct radix_tree_root *root, void **results, results[0] = node; return 1; } - node = radix_tree_indirect_to_ptr(node); + node = indirect_to_ptr(node); max_index = radix_tree_maxindex(node->height); @@ -916,7 +925,8 @@ radix_tree_gang_lookup(struct radix_tree_root *root, void **results, slot = *(((void ***)results)[ret + i]); if (!slot) continue; - results[ret + nr_found] = rcu_dereference_raw(slot); + results[ret + nr_found] = + indirect_to_ptr(rcu_dereference_raw(slot)); nr_found++; } ret += nr_found; @@ -965,7 +975,7 @@ radix_tree_gang_lookup_slot(struct radix_tree_root *root, void ***results, results[0] = (void **)&root->rnode; return 1; } - node = radix_tree_indirect_to_ptr(node); + node = indirect_to_ptr(node); max_index = radix_tree_maxindex(node->height); @@ -1090,7 +1100,7 @@ radix_tree_gang_lookup_tag(struct radix_tree_root *root, void **results, results[0] = node; return 1; } - node = radix_tree_indirect_to_ptr(node); + node = indirect_to_ptr(node); max_index = radix_tree_maxindex(node->height); @@ -1109,7 +1119,8 @@ radix_tree_gang_lookup_tag(struct radix_tree_root *root, void **results, slot = *(((void ***)results)[ret + i]); if (!slot) continue; - results[ret + nr_found] = rcu_dereference_raw(slot); + results[ret + nr_found] = + indirect_to_ptr(rcu_dereference_raw(slot)); nr_found++; } ret += nr_found; @@ -1159,7 +1170,7 @@ radix_tree_gang_lookup_tag_slot(struct radix_tree_root *root, void ***results, results[0] = (void **)&root->rnode; return 1; } - node = radix_tree_indirect_to_ptr(node); + node = indirect_to_ptr(node); max_index = radix_tree_maxindex(node->height); @@ -1195,7 +1206,7 @@ static inline void radix_tree_shrink(struct radix_tree_root *root) void *newptr; BUG_ON(!radix_tree_is_indirect_ptr(to_free)); - to_free = radix_tree_indirect_to_ptr(to_free); + to_free = indirect_to_ptr(to_free); /* * The candidate node has more than one child, or its child @@ -1208,16 +1219,39 @@ static inline void radix_tree_shrink(struct radix_tree_root *root) /* * We don't need rcu_assign_pointer(), since we are simply - * moving the node from one part of the tree to another. If - * it was safe to dereference the old pointer to it + * moving the node from one part of the tree to another: if it + * was safe to dereference the old pointer to it * (to_free->slots[0]), it will be safe to dereference the new - * one (root->rnode). + * one (root->rnode) as far as dependent read barriers go. */ newptr = to_free->slots[0]; if (root->height > 1) - newptr = radix_tree_ptr_to_indirect(newptr); + newptr = ptr_to_indirect(newptr); root->rnode = newptr; root->height--; + + /* + * We have a dilemma here. The node's slot[0] must not be + * NULLed in case there are concurrent lookups expecting to + * find the item. However if this was a bottom-level node, + * then it may be subject to the slot pointer being visible + * to callers dereferencing it. If item corresponding to + * slot[0] is subsequently deleted, these callers would expect + * their slot to become empty sooner or later. + * + * For example, lockless pagecache will look up a slot, deref + * the page pointer, and if the page is 0 refcount it means it + * was concurrently deleted from pagecache so try the deref + * again. Fortunately there is already a requirement for logic + * to retry the entire slot lookup -- the indirect pointer + * problem (replacing direct root node with an indirect pointer + * also results in a stale slot). So tag the slot as indirect + * to force callers to retry. + */ + if (root->height == 0) + *((unsigned long *)&to_free->slots[0]) |= + RADIX_TREE_INDIRECT_PTR; + radix_tree_node_free(to_free); } } @@ -1254,7 +1288,7 @@ void *radix_tree_delete(struct radix_tree_root *root, unsigned long index) root->rnode = NULL; goto out; } - slot = radix_tree_indirect_to_ptr(slot); + slot = indirect_to_ptr(slot); shift = (height - 1) * RADIX_TREE_MAP_SHIFT; pathp->node = NULL; @@ -1296,8 +1330,7 @@ void *radix_tree_delete(struct radix_tree_root *root, unsigned long index) radix_tree_node_free(to_free); if (pathp->node->count) { - if (pathp->node == - radix_tree_indirect_to_ptr(root->rnode)) + if (pathp->node == indirect_to_ptr(root->rnode)) radix_tree_shrink(root); goto out; } diff --git a/mm/filemap.c b/mm/filemap.c index 61ba5e405791..ea89840fc65f 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -644,7 +644,9 @@ repeat: pagep = radix_tree_lookup_slot(&mapping->page_tree, offset); if (pagep) { page = radix_tree_deref_slot(pagep); - if (unlikely(!page || page == RADIX_TREE_RETRY)) + if (unlikely(!page)) + goto out; + if (radix_tree_deref_retry(page)) goto repeat; if (!page_cache_get_speculative(page)) @@ -660,6 +662,7 @@ repeat: goto repeat; } } +out: rcu_read_unlock(); return page; @@ -777,12 +780,11 @@ repeat: page = radix_tree_deref_slot((void **)pages[i]); if (unlikely(!page)) continue; - /* - * this can only trigger if nr_found == 1, making livelock - * a non issue. - */ - if (unlikely(page == RADIX_TREE_RETRY)) + if (radix_tree_deref_retry(page)) { + if (ret) + start = pages[ret-1]->index; goto restart; + } if (!page_cache_get_speculative(page)) goto repeat; @@ -830,11 +832,7 @@ repeat: page = radix_tree_deref_slot((void **)pages[i]); if (unlikely(!page)) continue; - /* - * this can only trigger if nr_found == 1, making livelock - * a non issue. - */ - if (unlikely(page == RADIX_TREE_RETRY)) + if (radix_tree_deref_retry(page)) goto restart; if (page->mapping == NULL || page->index != index) @@ -887,11 +885,7 @@ repeat: page = radix_tree_deref_slot((void **)pages[i]); if (unlikely(!page)) continue; - /* - * this can only trigger if nr_found == 1, making livelock - * a non issue. - */ - if (unlikely(page == RADIX_TREE_RETRY)) + if (radix_tree_deref_retry(page)) goto restart; if (!page_cache_get_speculative(page)) @@ -1029,6 +1023,9 @@ find_page: goto page_not_up_to_date; if (!trylock_page(page)) goto page_not_up_to_date; + /* Did it get truncated before we got the lock? */ + if (!page->mapping) + goto page_not_up_to_date_locked; if (!mapping->a_ops->is_partially_uptodate(page, desc, offset)) goto page_not_up_to_date_locked; diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 9a99cfaf0a19..2efa8ea07ff7 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4208,15 +4208,17 @@ static struct mem_cgroup *mem_cgroup_alloc(void) memset(mem, 0, size); mem->stat = alloc_percpu(struct mem_cgroup_stat_cpu); - if (!mem->stat) { - if (size < PAGE_SIZE) - kfree(mem); - else - vfree(mem); - mem = NULL; - } + if (!mem->stat) + goto out_free; spin_lock_init(&mem->pcp_counter_lock); return mem; + +out_free: + if (size < PAGE_SIZE) + kfree(mem); + else + vfree(mem); + return NULL; } /* diff --git a/mm/mprotect.c b/mm/mprotect.c index 2d1bf7cf8851..4c5133873097 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -211,6 +211,7 @@ success: mmu_notifier_invalidate_range_end(mm, start, end); vm_stat_account(mm, oldflags, vma->vm_file, -nrpages); vm_stat_account(mm, newflags, vma->vm_file, nrpages); + perf_event_mmap(vma); return 0; fail: @@ -299,7 +300,6 @@ SYSCALL_DEFINE3(mprotect, unsigned long, start, size_t, len, error = mprotect_fixup(vma, &prev, nstart, tmp, newflags); if (error) goto out; - perf_event_mmap(vma); nstart = tmp; if (nstart < prev->vm_end) diff --git a/mm/vmscan.c b/mm/vmscan.c index b8a6fdc21312..d31d7ce52c0e 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -913,7 +913,7 @@ keep_lumpy: * back off and wait for congestion to clear because further reclaim * will encounter the same problem */ - if (nr_dirty == nr_congested) + if (nr_dirty == nr_congested && nr_dirty != 0) zone_set_flag(zone, ZONE_CONGESTED); free_page_list(&free_pages); diff --git a/security/Kconfig b/security/Kconfig index bd72ae623494..e80da955e687 100644 --- a/security/Kconfig +++ b/security/Kconfig @@ -39,6 +39,18 @@ config KEYS_DEBUG_PROC_KEYS If you are unsure as to whether this is required, answer N. +config SECURITY_DMESG_RESTRICT + bool "Restrict unprivileged access to the kernel syslog" + default n + help + This enforces restrictions on unprivileged users reading the kernel + syslog via dmesg(8). + + If this option is not selected, no restrictions will be enforced + unless the dmesg_restrict sysctl is explicitly set to (1). + + If you are unsure how to answer this question, answer N. + config SECURITY bool "Enable different security models" depends on SYSFS diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c index cf1de4462ccd..b7106f192b75 100644 --- a/security/apparmor/lsm.c +++ b/security/apparmor/lsm.c @@ -922,7 +922,7 @@ static int __init apparmor_init(void) error = register_security(&apparmor_ops); if (error) { AA_ERROR("Unable to register AppArmor\n"); - goto register_security_out; + goto set_init_cxt_out; } /* Report that AppArmor successfully initialized */ @@ -936,6 +936,9 @@ static int __init apparmor_init(void) return error; +set_init_cxt_out: + aa_free_task_context(current->real_cred->security); + register_security_out: aa_free_root_ns(); @@ -944,7 +947,6 @@ alloc_out: apparmor_enabled = 0; return error; - } security_initcall(apparmor_init); diff --git a/security/apparmor/policy.c b/security/apparmor/policy.c index 52cc865f1464..4f0eadee78b8 100644 --- a/security/apparmor/policy.c +++ b/security/apparmor/policy.c @@ -306,7 +306,7 @@ static struct aa_namespace *alloc_namespace(const char *prefix, return ns; fail_unconfined: - kzfree(ns->base.name); + kzfree(ns->base.hname); fail_ns: kzfree(ns); return NULL; diff --git a/security/commoncap.c b/security/commoncap.c index 5e632b4857e4..04b80f9912bf 100644 --- a/security/commoncap.c +++ b/security/commoncap.c @@ -895,6 +895,8 @@ int cap_syslog(int type, bool from_file) { if (type != SYSLOG_ACTION_OPEN && from_file) return 0; + if (dmesg_restrict && !capable(CAP_SYS_ADMIN)) + return -EPERM; if ((type != SYSLOG_ACTION_READ_ALL && type != SYSLOG_ACTION_SIZE_BUFFER) && !capable(CAP_SYS_ADMIN)) return -EPERM; |