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authorLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 21:25:27 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 21:25:27 +0100
commit9798f5178f5791f964562eccedcf4dabe02fd825 (patch)
treed0d76b4202eaa3d3be3aaa05206e57e02e16ac5b /drivers/gpio/gpiolib.h
parentMerge tag 'leds_for_4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff)
parentgpio: Timestamp events in hardirq handler (diff)
downloadlinux-9798f5178f5791f964562eccedcf4dabe02fd825.tar.xz
linux-9798f5178f5791f964562eccedcf4dabe02fd825.zip
Merge tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij: "The is the bulk of GPIO changes for the v4.16 kernel cycle. It is pretty calm this time around I think. I even got time to get to things like starting to clean up header includes. Core changes: - Disallow open drain and open source flags to be set simultaneously. This doesn't make electrical sense, and would the hardware actually respond to this setting, the result would be short circuit. - ACPI GPIO has a new core infrastructure for handling quirks. The quirks are there to deal with broken ACPI tables centrally instead of pushing the work to individual drivers. In the world of BIOS writers, the ACPI tables are perfect. Until they find a mistake in it. When such a mistake is found, we can patch it with a quirk. It should never happen, the problem is that it happens. So we accomodate for it. - Several documentation updates. - Revert the patch setting up initial direction state from reading the device. This was causing bad things for drivers that can't read status on all its pins. It is only affecting debugfs information quality. - Label descriptors with the device name if no explicit label is passed in. - Pave the ground for transitioning SPI and regulators to use GPIO descriptors by implementing some quirks in the device tree GPIO parsing code. New drivers: - New driver for the Access PCIe IDIO 24 family. Other: - Major refactorings and improvements to the GPIO mockup driver used for test and verification. - Moved the AXP209 driver over to pin control since it gained a pin control back-end. These patches will appear (with the same hashes) in the pin control pull request as well. - Convert the onewire GPIO driver w1-gpio to use descriptors. This is merged here since the W1 maintainers send very few pull requests and he ACKed it. - Start to clean up driver headers using <linux/gpio.h> to just use <linux/gpio/driver.h> as appropriate" * tag 'gpio-v4.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (103 commits) gpio: Timestamp events in hardirq handler gpio: Fix kernel stack leak to userspace gpio: Fix a documentation spelling mistake gpio: Documentation update gpiolib: remove redundant initialization of pointer desc gpio: of: Fix NPE from OF flags gpio: stmpe: Delete an unnecessary variable initialisation in stmpe_gpio_probe() gpio: stmpe: Move an assignment in stmpe_gpio_probe() gpio: stmpe: Improve a size determination in stmpe_gpio_probe() gpio: stmpe: Use seq_putc() in stmpe_dbg_show() gpio: No NULL owner gpio: stmpe: i2c transfer are forbiden in atomic context gpio: davinci: Include proper header gpio: da905x: Include proper header gpio: cs5535: Include proper header gpio: crystalcove: Include proper header gpio: bt8xx: Include proper header gpio: bcm-kona: Include proper header gpio: arizona: Include proper header gpio: amd8111: Include proper header ...
Diffstat (limited to 'drivers/gpio/gpiolib.h')
-rw-r--r--drivers/gpio/gpiolib.h18
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index 6c44d1652139..b17ec6795c81 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -58,7 +58,7 @@ struct gpio_device {
struct gpio_desc *descs;
int base;
u16 ngpio;
- char *label;
+ const char *label;
void *data;
struct list_head list;
@@ -75,16 +75,20 @@ struct gpio_device {
/**
* struct acpi_gpio_info - ACPI GPIO specific information
+ * @adev: reference to ACPI device which consumes GPIO resource
* @flags: GPIO initialization flags
* @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
* @polarity: interrupt polarity as provided by ACPI
* @triggering: triggering type as provided by ACPI
+ * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping
*/
struct acpi_gpio_info {
+ struct acpi_device *adev;
enum gpiod_flags flags;
bool gpioint;
int polarity;
int triggering;
+ unsigned int quirks;
};
/* gpio suffixes used for ACPI and device tree lookup */
@@ -124,7 +128,7 @@ void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags,
- enum gpiod_flags update);
+ struct acpi_gpio_info *info);
struct gpio_desc *acpi_find_gpio(struct device *dev,
const char *con_id,
@@ -149,7 +153,7 @@ static inline void
acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
static inline int
-acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, enum gpiod_flags update)
+acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, struct acpi_gpio_info *info)
{
return 0;
}
@@ -189,6 +193,12 @@ void gpiod_set_array_value_complex(bool raw, bool can_sleep,
struct gpio_desc **desc_array,
int *value_array);
+/* This is just passed between gpiolib and devres */
+struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
+ const char *propname, int index,
+ enum gpiod_flags dflags,
+ const char *label);
+
extern struct spinlock gpio_lock;
extern struct list_head gpio_devices;
@@ -205,7 +215,7 @@ struct gpio_desc {
#define FLAG_OPEN_SOURCE 8 /* Gpio is open source type */
#define FLAG_USED_AS_IRQ 9 /* GPIO is connected to an IRQ */
#define FLAG_IS_HOGGED 11 /* GPIO is hogged */
-#define FLAG_SLEEP_MAY_LOSE_VALUE 12 /* GPIO may lose value in sleep */
+#define FLAG_TRANSITORY 12 /* GPIO may lose value in sleep or reset */
/* Connection label */
const char *label;