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* OMAP: GPIO: Implement GPIO as a platform deviceVaradarajan, Charulatha2010-12-0843-359/+107
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement GPIO as a platform device. GPIO APIs are used in machine_init functions. Hence it is required to complete GPIO probe before board_init. Therefore GPIO device register and driver register are implemented as postcore_initcalls. omap_gpio_init() does nothing now and this function would be removed in the next patch as it's usage is spread across most of the board files. Inorder to convert GPIO as platform device, modifications are required in clockxxxx_data.c file for OMAP1 so that device names can be used to obtain clock instead of getting clocks by name/NULL ptr. Use runtime pm APIs (pm_runtime_put*/pm_runtime_get*) for enabling or disabling the clocks, modify sysconfig settings and remove usage of clock FW APIs. Note 1: Converting GPIO driver to use runtime PM APIs is not done as a separate patch because GPIO clock names are different for various OMAPs and are different for some of the banks in the same CPU. This would need usage of cpu_is checks and bank id checks while using clock FW APIs in the gpio driver. Hence while making GPIO a platform driver framework, PM runtime APIs are used directly. Note 2: While implementing GPIO as a platform device, pm runtime APIs are used as mentioned above and modification is not done in gpio's prepare for idle/ resume after idle functions. This would be done in the next patch series and GPIO driver would be made to use dev_pm_ops instead of sysdev_class in that series only. Due to the above, the GPIO driver implicitly relies on CM_AUTOIDLE = 1 on its iclk for power management to work, since the driver never disables its iclk. This would be taken care in the next patch series (see Note 3 below). Refer to http://www.mail-archive.com/linux-omap@vger.kernel.org/msg39112.html for more details. Note 3: only pm_runtime_get_sync is called in gpio's probe() and pm_runtime_put* is never called. This is to make the implementation similar to the existing GPIO code. Another patch series would be sent to correct this. In OMAP3 and OMAP4 gpio's debounce clocks are optional clocks. They are enabled/ disabled whenever required using clock framework APIs TODO: 1. Cleanup the GPIO driver. Use function pointers and register offest pointers instead of using hardcoded values 2. Remove all cpu_is_ checks and OMAP specific macros 3. Remove usage of gpio_bank array so that only instance specific information is used in driver code 4. Rename 'method'/ avoid it's usage 5. Fix the non-wakeup gpios handling for OMAP2430, OMAP3 & OMAP4 6. Modify gpio's prepare for idle/ resume after idle functions to use runtime pm implentation. Signed-off-by: Charulatha V <charu@ti.com> Signed-off-by: Rajendra Nayak <rnayak@ti.com> Reviewed-by: Basak, Partha <p-basak2@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> [tony@atomide.com: updated for bank specific revision and updated boards] Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP2+: GPIO: device registrationVaradarajan, Charulatha2010-12-081-0/+104
| | | | | | | | | | | | | | | Use omap_device_build() API to do platform_device_register of GPIO devices. For OMAP2+ chips, the device specific data defined in the centralized hwmod database will be used. gpio_init needs to be done before machine_init functions access gpio APIs. Hence gpio_init is made as a postcore_initcall. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Benoit Cousson <b-cousson@ti.com> Reviewed-by: Basak, Partha <p-basak2@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP4: hwmod data: Add GPIOBenoit Cousson2010-12-081-0/+341
| | | | | | | | | Add GPIO hwmod data for OMAP4 Signed-off-by: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP3: hwmod data: Add GPIOVaradarajan, Charulatha2010-12-081-1/+360
| | | | | | | | | | | | | Add GPIO hwmod data for OMAP3 Also remove "omap34xx.h" header file as it is not required anymore. Signed-off-by: Charulatha V <charu@ti.com> Signed-off-by: Rajendra Nayak <rnayak@ti.com> Acked-by: Benoit Cousson <b-cousson@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP2430: hwmod data: Add GPIOVaradarajan, Charulatha2010-12-081-1/+279
| | | | | | | | | | | | Add GPIO hwmod data for OMAP2430 Also remove "omap24xx.h" header file as it is not required anymore. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Benoit Cousson <b-cousson@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP2420: hwmod data: Add GPIOVaradarajan, Charulatha2010-12-082-1/+234
| | | | | | | | | | | | | Add GPIO hwmod data for OMAP2420 and add the required GPIO device attributes in the gpio header file Also remove "omap24xx.h" header file as it is not required anymore. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Benoit Cousson <b-cousson@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP7xx: GPIO: Introduce support for GPIO initVaradarajan, Charulatha2010-12-081-0/+261
| | | | | | | | | Add support for handling OMAP7xx specific gpio_init by providing platform device data and doing device registration. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP16xx: GPIO: Introduce support for GPIO initVaradarajan, Charulatha2010-12-081-0/+199
| | | | | | | | | Add support for handling OMAP16xx specific gpio_init by providing platform device data and doing device registration. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP15xx: GPIO: Introduce support for GPIO initVaradarajan, Charulatha2010-12-083-8/+118
| | | | | | | | | Add support for handling OMAP15xx specific gpio_init by providing platform device data and doing device registration. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP: GPIO: Make omap_gpio_show_rev bank specificTony Lindgren2010-12-081-6/+6
| | | | | | | | Otherwise GPIO init on 16xx may try to access uninitialized GPIO bank as the MPUIO bank does not have a revision register. Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP: GPIO: prepare for platform driverVaradarajan, Charulatha2010-12-081-116/+118
| | | | | | | | | | | | | | | | | Prepare for implementing GPIO as a platform driver. Modifies omap_gpio_init() to make use of omap_gpio_chip_init() and omap_gpio_mod_init(). omap_gpio_mod_init() does the module init by clearing the status register and initializing the GPIO control register. omap_gpio_chip_init() initializes the chip request, free, get, set and other function pointers and sets the gpio irq handler. This is only to reorganize the code so that the "omap gpio platform driver implementation patch" looks cleaner and better to review. Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: Fix gpio_request calls to happen as arch_initcallTony Lindgren2010-12-088-36/+42
| | | | | | | | | Looks like some boards are calling gpio_request from init_irq. This will make the request_irq fail, as GPIO will be initialized as postcore_initcall. Reported-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: Don't select mux by default for each boardTony Lindgren2010-12-081-4/+0
| | | | | | | This should be only selected in CONFIG_ARCH_OMAP2PLUS_TYPICAL to make it easy to disable. Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: McBSP: Make the free variable update more readableShubhrajyoti D2010-12-081-4/+4
| | | | | | | | Using true/false instead of 1/0 to update the free variable. Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com> Acked-by: Jarkko Nikula <jhnikula@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: McBSP: Fix potential memory leak in omap_mcbsp_removeJarkko Nikula2010-12-081-7/+1
| | | | | | | | | | | | Function omap_mcbsp_probe allocates struct omap_mcbsp *mcbsp but it is not freed in omap_mcbsp_remove. Fix this, remove unneeded structure cleanups and clk_disable calls since they are not needed here. This is not problem currently but becomes if the mcbsp driver is ever modularized. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: Ptr "isr_reg" tracked as NULL was dereferencedEvgeny Kuznetsov2010-12-081-0/+5
| | | | | | | | | Value of "isr_reg" pointer is depend on configuration and GPIO method. Potentially it may have NULL value and it is dereferenced later in code. Warning and exit from function are added in this case. Signed-off-by: Evgeny Kuznetsov <EXT-Eugeny.Kuznetsov@nokia.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: Fix undefined reference to omap2_i2c_mux_pinsTony Lindgren2010-12-081-0/+7
| | | | | | | | | In some cases we can get error function `omap2_i2c_add_bus': arch/arm/plat-omap/i2c.c:136: undefined reference to `omap2_i2c_mux_pins' arch/arm/plat-omap/i2c.c:141: undefined reference to `omap_hwmod_lookup' arch/arm/plat-omap/i2c.c:157: undefined reference to `omap_device_build' Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP1: I2C: fix device initializationPaul Walmsley2010-12-071-0/+5
| | | | | | | | | | | | | | | | | | | | | | Commit 4d17aeb1c5b2375769446d13012a98e6d265ec13 ("OMAP: I2C: split device registration and convert OMAP2+ to omap_device") broke I2C on OMAP1. The following messages appear at boot: i2c_omap i2c_omap.1: failure requesting irq 0 i2c_omap: probe of i2c_omap.1 failed with error -22 Investigation revealed that a chunk of code is missing from the original plat-omap/i2c.c file which configured the IRQ and base address for the I2C block on OMAP1. Upon adding this back, the OMAP1 I2C block seems to initialize correctly. Thanks to Cory Maccarrone <darkstar6262@gmail.com> for reporting the bug, and apologies for the breakage. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Tested-by: Cory Maccarrone <darkstar6262@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* Merge branch 'ctrl-wip/mux-omap4-v4' of git://gitorious.org/omap-pm/linux ↵Tony Lindgren2010-11-3012-147/+2310
|\ | | | | | | into omap-for-linus
| * OMAP: mux: Add __func__ macro to pr_xxx macrosDan Murphy2010-11-175-21/+23
| | | | | | | | | | | | | | | | | | Removed mux: and added the __func__ macro to make debugging easier. Signed-off-by: Dan Murphy <dmurphy@ti.com> Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Tony Lindgren <tony@atomide.com>
| * OMAP4: pandaboard: Select CBL & CBS package and initialize muxsricharan2010-11-172-0/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | The mux framework allows the change of pad configuration by drivers when needed. Prior to this the mux framework has to be initialised with all the mux parameters specific to the board. The mux init is already present in the board file for SDP. Adding the mux init for panda boards. Signed-off-by: sricharan <r.sricharan@ti.com> Acked-by: Anand Gadiyar <gadiyar@ti.com> Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
| * OMAP4: sdp4430: Select CBS package for ES2Benoit Cousson2010-11-172-1/+6
| | | | | | | | | | | | | | | | | | | | | | Select the CBS package if SDP4430 is enabled during config. Use the proper package (CBL or CBS) based on chip revision. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Anand Gadiyar <gadiyar@ti.com>
| * OMAP4: mux: Add CBS package data for OMAP4430 ES2Benoit Cousson2010-11-174-8/+758
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Please note that the full muxmodes are re-defined for ES2 instead of using the subset. There are 81 differences among 204 pins. The subset fixup will have to iterate over the whole list for each subset entry, which can lead to an important number of iteration. On the other hand, it will take much more memory at boot time. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Anand Gadiyar <gadiyar@ti.com>
| * OMAP4: sdp4430: Select CBL package for ES1 and initialize muxBenoit Cousson2010-11-172-0/+11
| | | | | | | | | | | | | | | | | | | | Select the CBL package if SDP4430 is enabled during config. Initialize the mux framework during the board init. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Kevin Hilman <khilman@deeprootsystems.com>
| * OMAP4: mux: Add CBL package data for OMAP4430 ES1Benoit Cousson2010-11-175-0/+1193
| | | | | | | | | | | | | | | | | | | | Add data for OMAP4430 generated from HW pinout & register database. The data set is split in two partitions for both core and wkup. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Kevin Hilman <khilman@deeprootsystems.com>
| * OMAP: mux: Add support for control module split in several partitionsBenoit Cousson2010-11-176-128/+312
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Starting on OMAP4, the pin mux configuration is located in two different partitions of the control module (CODE_PAD and WKUP_PAD). The first one is inside the core power domain whereas the second one is inside the wakeup. - Add the capability to add any number of partition during board init time depending of Soc partitioning. - Add some init flags as well in order to avoid explicit Soc version check inside the mux core code. - Add a comment with mux0 mode on top of omap_mux/board/<partition> if the current mux mode is not the default one. Thanks to Tony Lindgren <tony@atomide.com> for the following improvements: - Add omap_mux_get for getting the partition data so platform level device code can use it. - Fix the rx51 board code to use the new API. - Do not store the partition for each mux entry. Look up the partition for debugfs instead. Thanks to Dan Murphy <dmurphy@ti.com> for testing on OMAP4 and reporting a couple of bugs. Thanks to Anand Gadiyar <gadiyar@ti.com> for testing on OMAP3 zoom and bug report. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Tested-by: Murphy Dan <dmurphy@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com> Cc: Anand Gadiyar <gadiyar@ti.com>
| * OMAP: mux: Replace printk with pr_xxx macrosBenoit Cousson2010-11-171-19/+19
| | | | | | | | | | | | | | | | | | Replace all the printk(KERN_XXX... with pr_xxx macros. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Kevin Hilman <khilman@deeprootsystems.com>
* | Merge branch 'pm-hwmod-i2c' of ↵Tony Lindgren2010-11-309-80/+858
|\ \ | | | | | | | | | ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus
| * | OMAP: I2C: split device registration and convert OMAP2+ to omap_devicePaul Walmsley2010-11-091-75/+49
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Split the OMAP1 and OMAP2+ platform_device build and register code. Convert the OMAP2+ variant to use omap_device. This patch was developed in collaboration with Rajendra Nayak <rnayak@ti.com>. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Rajendra Nayak <rnayak@ti.com> Cc: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
| * | OMAP4: hwmod: add I2C hwmods for OMAP4430Benoit Cousson2010-11-091-0/+237
| | | | | | | | | | | | | | | | | | | | | | | | Add hwmod structures for I2C controllers on OMAP4430. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
| * | OMAP3: hwmod: add I2C hwmods for OMAP3430Rajendra Nayak2010-11-094-0/+273
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add hwmod structures for I2C controllers on OMAP3430. This patch was developed in collaboration with Paul Walmsley <paul@pwsan.com>. OMAP3 fixes for correct IDLEST bit monitoring from G, Manjunath Kondaiah <manjugk@ti.com> Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: G, Manjunath Kondaiah <manjugk@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
| * | OMAP2xxx: hwmod: add I2C hwmods for OMAP2420, 2430Paul Walmsley2010-11-093-5/+299
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add hwmod structures for I2C controllers on OMAP2420/2430. NOTE: I2C module on OMAP2420 has 16bit registers and causes imprecise aborts if 32bits are read/written to it. Use the HWMOD_16BIT_REG flag to notify the hmwod framework of this hard requirement so that __raw_writew/readw is used to read /write the mdoule registers. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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| \ \
*-. \ \ Merge branches 'devel-cleanup', 'devel-serial' and 'devel-board' into ↵Tony Lindgren2010-11-3064-603/+5328
|\ \ \ \ | | | | | | | | | | | | | | | omap-for-linus
| | * | | omap: AM3517/05: Add craneboard supportSrinath2010-11-304-0/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Craneboard is a hardware development platform based on the Sitara AM3517 ARM Cortex - A8 microprocessor device. This is a low cost reference design. This patch adds basic board file. Detailed support will follow in subsequent patches. [1] http://www.ti.com/arm [2] http://www.mistralsolutions.com/products/craneboard.php Signed-off-by: Srinath <srinath@mistralsolutions.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | | OMAP1: drop AMS_DELTA_FIQ config optionJanusz Krzysztofik2010-11-303-14/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patches removes a config option that was used to select a FIQ handler to be build for Amstrad Delta, as required by the on-board serio interface driver. Not having any problem reports received since it was introduced in 2.6.35, the FIQ handler can now be built and initialized by default, thus reqiring no extra config option. Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | | arm: omap: zoom: substitute gpio number with symbolic nameFelipe Balbi2010-11-301-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's easier to understand what that number means and also avoids problems if we ever have to change it. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | | arm: omap: combine zoom2 and zoom3 board-filesFelipe Balbi2010-11-303-160/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | They are extremely similar anyway, let's get rid of one file. While at that, also remove the empty zoom_config variable. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | | omap3: IGEP v2: Improve igep2_flash_init() functionEnric Balletbo i Serra2010-11-301-12/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The changes are: - Use 'for' loop instead 'while' loop. - No need to initialize ret to 0, we're assigning it right after. - No need to check for onenandcs < GPMC_CS_NUM here, it will always be true. Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | | omap3: IGEP v2: Remove igep2_config arrayEnric Balletbo i Serra2010-11-301-5/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | omap_board_config_size is implicitly initialized to 0 in plat-omap/common.c, get_config() won't dereference omap_board_config, so we can remove the empty igep2_config array. Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | | omap3: IGEP v2: Remove onenand_setup no-op functionEnric Balletbo i Serra2010-11-051-7/+0
| | |/ / | | | | | | | | | | | | | | | | | | | | | | | | Set onenand_setup to NULL instead of adding a no-op function. Signed-off-by: Enric Balletbo i Serra <eballetbo@gmail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| * | | omap: Serial: Define register access modes in LCRAndrei Emeltchenko2010-11-302-15/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Access to some registers depends on register access mode Three different modes are available for OMAP (at least) • Operational mode LCR_REG[7] = 0x0 • Configuration mode A LCR_REG[7] = 0x1 and LCR_REG[7:0]! = 0xBF • Configuration mode B LCR_REG[7] = 0x1 and LCR_REG[7:0] = 0xBF Define access modes and remove redefinitions and magic numbers in serial drivers (and later in bluetooth driver). Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com> Acked-by: Govindraj.R <govindraj.raja@ti.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Tony Lindgren <tony@atomide.com>
| * | | OMAP: Serial: Define OMAP uart MDR1 reg and remove magic numbersAndrei Emeltchenko2010-11-303-11/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Define MDR1 register serial definitions used in serial and bluetooth drivers. Change magic number to ones defined in serial_reg for omap1/2 serial driver. Remove redefined MDR1 register definitions in omap-serial driver. Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com> Acked-by: G, Manjunath Kondaiah <manjugk@ti.com> Acked-by: Govindraj.R <govindraj.raja@ti.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Tony Lindgren <tony@atomide.com>
| * | | Merge branch 'merge' of ↵Linus Torvalds2010-11-301-1/+1
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc: Use call_rcu_sched() for pagetables
| | * | | powerpc: Use call_rcu_sched() for pagetablesPeter Zijlstra2010-11-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | PowerPC relies on IRQ-disable to guard against RCU quiecent states, use the appropriate RCU call version. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | | Merge branch 'omap-fixes-for-linus' of ↵Linus Torvalds2010-11-293-1/+23
| |\ \ \ \ | | |/ / / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 * 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: OMAP2+: PM/serial: hold console semaphore while OMAP UARTs are disabled OMAP: UART: don't resume UARTs that are not enabled.
| | * | | OMAP2+: PM/serial: hold console semaphore while OMAP UARTs are disabledPaul Walmsley2010-11-253-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The console semaphore must be held while the OMAP UART devices are disabled, lest a console write cause an ARM abort (and a kernel crash) when the underlying console device is inaccessible. These crashes only occur when the console is on one of the OMAP internal serial ports. While this problem has been latent in the PM idle loop for some time, the crash was not triggerable with an unmodified kernel until commit 6f251e9db1093c187addc309b5f2f7fe3efd2995 ("OMAP: UART: omap_device conversions, remove implicit 8520 assumptions"). After this patch, a console write often occurs after the console UART has been disabled in the idle loop, crashing the system. Several users have encountered this bug: http://www.mail-archive.com/linux-omap@vger.kernel.org/msg38396.html http://www.mail-archive.com/linux-omap@vger.kernel.org/msg36602.html The same commit also introduced new code that disabled the UARTs during init, in omap_serial_init_port(). The kernel will also crash in this code when earlyconsole and extra debugging is enabled: http://www.mail-archive.com/linux-omap@vger.kernel.org/msg36411.html The minimal fix for the -rc series is to hold the console semaphore while the OMAP UARTs are disabled. This is a somewhat overbroad fix, since the console may not be located on an OMAP UART, as is the case with the GPMC UART on Zoom3. While it is technically possible to determine which devices the console or earlyconsole is actually running on, it is not a trivial problem to solve, and the code to do so is not really appropriate for the -rc series. The right long-term fix is to ensure that no code outside of the OMAP serial driver can disable an OMAP UART. As I understand it, code to implement this is under development by TI. This patch is a collaboration between Paul Walmsley <paul@pwsan.com> and Tony Lindgren <tony@atomide.com>. Thanks to Ming Lei <tom.leiming@gmail.com> and Pramod <pramod.gurav@ti.com> for their feedback on earlier versions of this patch. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Cc: Ming Lei <tom.leiming@gmail.com> Cc: Pramod <pramod.gurav@ti.com> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Cc: Jean Pihet <jean.pihet@newoldbits.com> Cc: Govindraj.R <govindraj.raja@ti.com>
| | * | | OMAP: UART: don't resume UARTs that are not enabled.Kevin Hilman2010-11-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add additional check to omap_uart_resume_idle() so that only enabled (specifically, idle-enabled) UARTs are allowed to resume. This matches the existing check in prepare idle. Without this patch, the system will hang if a board is configured to register only some uarts instead of all of them and PM is enabled. Cc: Govindraj R. <govindraj.raja@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> [tony@atomide.com: updated description] Signed-off-by: Tony Lindgren <tony@atomide.com>
| * | | | Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2010-11-282-1/+21
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf: Fix the software context switch counter perf, x86: Fixup Kconfig deps x86, perf, nmi: Disable perf if counters are not accessible perf: Fix inherit vs. context rotation bug
| | * | | | perf, x86: Fixup Kconfig depsPeter Zijlstra2010-11-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This leads to a Kconfig dep inversion, x86 selects PERF_EVENT (due to a hw_breakpoint dep) but doesn't unconditionally provide HAVE_PERF_EVENT. (This can cause build failures on M386/M486 kernel .config's.) Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20101117222055.982965150@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | | x86, perf, nmi: Disable perf if counters are not accessibleDon Zickus2010-11-261-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In a kvm virt guests, the perf counters are not emulated. Instead they return zero on a rdmsrl. The perf nmi handler uses the fact that crossing a zero means the counter overflowed (for those counters that do not have specific interrupt bits). Therefore on kvm guests, perf will swallow all NMIs thinking the counters overflowed. This causes problems for subsystems like kgdb which needs NMIs to do its magic. This problem was discovered by running kgdb tests. The solution is to write garbage into a perf counter during the initialization and hopefully reading back the same number. On kvm guests, the value will be read back as zero and we disable perf as a result. Reported-by: Jason Wessel <jason.wessel@windriver.com> Patch-inspired-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Don Zickus <dzickus@redhat.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> LKML-Reference: <1290462923-30734-1-git-send-email-dzickus@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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