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path: root/arch/arm/plat-omap/gpio.c
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* GPIO: OMAP: move to drivers/gpioKevin Hilman2011-05-27
| | | | | | | Move OMAP GPIO driver to drivers/gpio. Builds whenever CONFIG_ARCH_OMAP=y. Signed-off-by: Kevin Hilman <khilman@ti.com>
* GPIO: OMAP: move register offset defines into <plat/gpio.h>Kevin Hilman2011-05-27
| | | | | | | | Register offset defines are moved to <plat/gpio.h> so they can be used by SoC-specific device init code to fill out platform_data register offsets. Signed-off-by: Kevin Hilman <khilman@ti.com>
* Merge branch 'devel-stable' into for-linusRussell King2011-05-23
|\ | | | | | | | | | | Conflicts: arch/arm/Kconfig arch/arm/mach-ns9xxx/include/mach/uncompress.h
| * ARM: omap: update GPIO chained IRQ handler to use entry/exit functionsWill Deacon2011-05-11
| | | | | | | | | | | | | | | | | | | | | | This patch updates the OMAP gpio chained IRQ handler to use the chained IRQ enter/exit functions in order to function correctly on primary controllers with different methods of flow control. Cc: Colin Cross <ccross@google.com> Cc: Tony Lindgren <tony@atomide.com> Tested-and-acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
* | ARM / OMAP: Use struct syscore_ops for "core" power managementRafael J. Wysocki2011-04-24
|/ | | | | | | | | | Replace the sysdev class and struct sys_device used for power management in the OMAP's GPIO code with a struct syscore_ops object which is simpler. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Kevin Hilman <khilman@ti.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
* arm: Cleanup the irq namespaceThomas Gleixner2011-03-29
| | | | | | Convert to the new function names. Automated with coccinelle. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* arm: plat-omap: Cleanup irq_desc accessThomas Gleixner2011-03-29
| | | | | | | 1) Core code stores the flow type already 2) Flow type is accessible in irq_data Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* arm: Use genirq lockdep helper to set lock classThomas Gleixner2011-03-29
| | | | | | | Remove the open coded access to irq_desc which will fail on sparse irq and use the proper wrappers. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Merge branch 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2011-01-15
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm: (161 commits) ARM: pxa: fix building issue of missing physmap.h ARM: mmp: PXA910 drive strength FAST using wrong value ARM: mmp: MMP2 drive strength FAST using wrong value ARM: pxa: fix recursive calls in pxa_low_gpio_chip AT91: Support for gsia18s board AT91: Acme Systems FOX Board G20 board files AT91: board-sam9m10g45ek.c: Remove duplicate inclusion of mach/hardware.h ARM: pxa: fix suspend/resume array index miscalculation ARM: pxa: use cpu_has_ipr() consistently in irq.c ARM: pxa: remove unused variable in clock-pxa3xx.c ARM: pxa: fix warning in zeus.c ARM: sa1111: fix typo in sa1111_retrigger_lowirq() ARM mxs: clkdev related compile fixes ARM i.MX mx31_3ds: Fix MC13783 regulator names ARM: plat-stmp3xxx: irq_data conversion. ARM: plat-spear: irq_data conversion. ARM: plat-orion: irq_data conversion. ARM: plat-omap: irq_data conversion. ARM: plat-nomadik: irq_data conversion. ARM: plat-mxc: irq_data conversion. ... Fix up trivial conflict in arch/arm/plat-omap/gpio.c (Lennert Buytenhek's irq_data conversion clashing with some omap irq updates)
| * ARM: plat-omap: irq_data conversion.Lennert Buytenhek2011-01-13
| | | | | | | | Signed-off-by: Lennert Buytenhek <buytenh@secretlab.ca>
* | arm: omap: gpio: don't access irq_desc array directlyFelipe Balbi2011-01-07
| | | | | | | | | | | | | | | | | | | | Instead of accessing the irq_desc array directly we can use irq_to_desc(irq). That will allow us to, if wanted, select SPARSE_IRQ and irq_descs will be added to a radix tree, instead of a array. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com>
* | OMAP: GPIO: fix _set_gpio_triggering() for OMAP2+Mika Westerberg2011-01-07
|/ | | | | | | | | | | | | | | | | In case on OMAP2+ we call set_24xx_gpio_triggering() instead of updating reg and l values. However, at the end of the function we perform a write: __raw_writel(l, reg); So on OMAP2+ we end up writing 0 to the bank->base which is not correct (typically this points to GPIO_REVISION register). Fix this by returning immediately after call to set_24xx_gpio_triggering(). Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com> Signed-off-by: Kevin Hilman <khilman@ti.com>
* OMAP2+: powerdomain: move header file from plat-omap to mach-omap2Paul Walmsley2010-12-21
| | | | | | | | | | | | | | | | | | | | The OMAP powerdomain code and data is all OMAP2+-specific. This seems unlikely to change any time soon. Move plat-omap/include/plat/powerdomain.h to mach-omap2/powerdomain.h. The primary point of doing this is to remove the temptation for unrelated upper-layer code to access powerdomain code and data directly. As part of this process, remove the references to powerdomain data from the GPIO "driver" and the OMAP PM no-op layer, both in plat-omap. Change the DSPBridge code to point to the new location for the powerdomain headers. The DSPBridge code should not be including the powerdomain headers; these should be removed. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: Omar Ramirez Luna <omar.ramirez@ti.com> Cc: Felipe Contreras <felipe.contreras@gmail.com> Cc: Greg Kroah-Hartman <greg@kroah.com>
* omap1: Fix gpio mpuio bank to work for multi-omap for 7xx/15xx/16xxTony Lindgren2010-12-07
| | | | | | | | | | | | | | | We need to divide the 15xx/16xx offset by 2 for 7xx. Use bank->stride for that. This allows us to get rid of the duplicate defines for the MPUIO registers. Note that this will cause omap-keypad.c driver to not work on 7xx. However, the right fix there is to move over to matrix_keypad instead as suggested by Cory Maccarrone <darkstar6262@gmail.com> and Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>. Cc: Cory Maccarrone <darkstar6262@gmail.com> Acked-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP: GPIO: Implement GPIO as a platform deviceVaradarajan, Charulatha2010-12-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* OMAP15xx: GPIO: Introduce support for GPIO initVaradarajan, Charulatha2010-12-07
| | | | | | | | | 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 Lindgren2010-12-07
| | | | | | | | 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, Charulatha2010-12-07
| | | | | | | | | | | | | | | | | 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: Ptr "isr_reg" tracked as NULL was dereferencedEvgeny Kuznetsov2010-12-07
| | | | | | | | | 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>
* omap2: fix assorted compiler warningsSanjeev Premi2010-09-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes these compiler warnings: CC arch/arm/mach-omap2/mux.o arch/arm/mach-omap2/mux.c: In function 'omap_mux_init_gpio': arch/arm/mach-omap2/mux.c:90: warning: 'gpio_mux' may be used uninitial ized in this function CC arch/arm/plat-omap/gpio.o arch/arm/plat-omap/gpio.c: In function 'omap2_gpio_resume_after_idle': arch/arm/plat-omap/gpio.c:2152: warning: 'l' may be used uninitialized in this function arch/arm/plat-omap/gpio.c: In function 'omap2_gpio_prepare_for_idle': arch/arm/plat-omap/gpio.c:2085: warning: 'l2' may be used uninitialized in this function arch/arm/plat-omap/gpio.c:2085: warning: 'l1' may be used uninitialized in this function CC arch/arm/mach-omap2/board-omap4panda.o arch/arm/mach-omap2/board-omap4panda.c: In function 'omap4_panda_init': arch/arm/mach-omap2/board-omap4panda.c:277: warning: unused variable 's tatus' Signed-off-by: Sanjeev Premi <premi@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* OMAP: GPIO: ensure debounce clocks are disabled during idle/suspendKevin Hilman2010-09-23
| | | | | | | | | | | | | | | | If a GPIO bank has more than one GPIO with debounce enabled, the debounce clock will not be fully disabled before going to idle/suspend. In the idle path, we just do a single clk_disable() of the bank's debounce clock. If there are multiple debounce-enabled GPIOs in the bank, that clocks usage count will be > 1, so the clk_disable() will not actually disable the clock. So the fix is to clk_disable() for every debounce-enabled GPIO in the bank (and an equivalent clk_enable() of course.) Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
* omap2: Fix GPIO numbers and smc91x for 2430sdpTony Lindgren2010-08-02
| | | | | | | | Fix GPIO numbers and smc91x for 2430sdp. The earlier code had cut and paste errors from 3430sdp code. Also, 2430 has five GPIO banks for a total of 160 GPIO lines. Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: GPIO: fix auto-disable of debounce clockKevin Hilman2010-06-10
| | | | | | | | | | | | | The addition of the new debounce code (commit 168ef3d9a56bd8bffe0ef4189c450888b4aefefe) broke the auto-disable of debounce clocks on idle by forgetting to update the debounce clock enable mask. Add back the updating of bank->dbck_enable_mask so debounce clocks are auto-disabled. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* arm: omap: remove the unused omap_gpio_set_debounce methodsFelipe Balbi2010-05-27
| | | | | | | | | | | | Nobody uses that anymore, so remove and expect drivers to use the gpiolib implementation. Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Cc: Tony Lindgren <tony@atomide.com> Cc: David Brownell <david-b@pacbell.net> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arm: omap: gpio: implement set_debounce methodFelipe Balbi2010-05-27
| | | | | | | | | | | | OMAP supports debouncing of gpio lines, implement the method using gpiolib. Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Cc: Tony Lindgren <tony@atomide.com> Cc: David Brownell <david-b@pacbell.net> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* omap: GPIO: Fix OMAP4 GPIO reg access issuesCharulatha V2010-05-20
| | | | | | | | | | | Access to some of the OMAP4 GPIO registers are not properly handled. This patch fixes it. This patch is tested on 3430SDP and 4430SDP boards 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: remove duplicate debugfs interfaceKevin Hilman2010-05-12
| | | | | | | | | | The generic gpiolib provides a debugfs interface to GPIOs which provides identical (but nicer looking) data as the OMAP specific one. This patch completely drops the OMAP specific interface (/debug/omap_gpio) in favor of using the generic one (/debug/gpio.) Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
* OMAP3: GPIO: Removed a couple of unneeded registers from context save/restoreTero Kristo2010-05-12
| | | | | | | setwkuena and setdataout are covered already by wake_en and dataout fields. Signed-off-by: Tero Kristo <tero.kristo@nokia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
* OMAP3: GPIO: disable GPIO debounce clocks on idleKevin Hilman2010-05-12
| | | | | | | Ensure GPIO debounce clocks are disabled when idle. Otherwise, clocks will prevent PER powerdomain from entering retention. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
* OMAP2/3: GPIO: generalize prepare for idleKevin Hilman2010-05-12
| | | | | | | | | | | | Currently, the GPIO 'prepare' hook is only called when going to off-mode, while the function is called 'prepare_for_retention.' This patch renames the function to 'prepare_for_idle' and calls it for any powersate != PWRDM_POWER_ON passing in the powerstate. The hook itself is then responsible for doing various preparation based on the powerstate. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
* OMAP3: GPIO: Only enable WAKEUPEN for edge detection GPIOsChunqiu Wang2010-05-12
| | | | | | | | | | | | | According to the GPIO 'Wakeup and Interrupt' section of the TRM[1], wake-up requests can only be generated on edge transitions. Also for OMAP3, only edge GPIOs may lose interrupts when PER enters RET/OFF state, this is addressed by gpio prepare|resume idle functions [1] Section 25.5.3.1 OMAP34xx_ES3.1_TRM_V_Q Signed-off-by: Chunqiu Wang <cqwang@motorola.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
* OMAP3: GPIO fixes for off-modeTero Kristo2010-05-12
| | | | | | | | | | Off mode is now using the omap2 retention fix code for scanning GPIOs during off-mode transitions. All the *non_wakeup_gpios variables are now used for off-mode transition tracking on OMAP3. This patch fixes cases where GPIO state changes are missed during off-mode. Signed-off-by: Tero Kristo <tero.kristo@nokia.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
* omap: gpio: fix incorrect matching of IRQ_TYPE_EDGE_BOTHJanusz Krzysztofik2010-04-22
| | | | | | | | | | | | | Since IRQ_TYPE_EDGE_BOTH is defined as (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING), testing against it with a bitwise AND also matches both single-edge cases in addition to the intended both edges case. Fix it, replacing with a more accurate expression. Created and tested againts linux-2.6.34-rc3. Applicable to 2.6.33-stable as well. Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: Fix gpio_resume_after_retentionSergio Aguirre2010-03-11
| | | | | | | | | | | | | | | | For omap4 case, this was wrongly writing GPIO_LEVELDETECTx registers with OMAP24XX_ offset and OMAP4_ offset. Bug introduced in commit: commit 3f1686a9bfe74979c6ad538c78039730f665f77e Author: Tony Lindgren <tony@atomide.com> Date: Mon Feb 15 09:27:25 2010 -0800 omap: Fix gpio.c for multi-omap for omap4 Signed-off-by: Sergio Aguirre <saaguirre@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap4: Use irq line defines from irq-44xx.hSantosh Shilimkar2010-02-23
| | | | | | | | | | | | | | This patch removes all the omap4 specific irq line defines from plat/irqs.h and includes auto-generated irqs-44xx.h All the legacy naming style defines are replaced with the one from irqs-44xx.h Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com> Reviewed-by: Paul Walmsley <paul@pwsan.com> [tony@atomide.com: updated to compile with usb-musb.c] Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: Fix gpio.c for multi-omap for omap4Tony Lindgren2010-02-15
| | | | | | | Set up METHOD_GPIO_44XX instead of trying to use the METHOD_GPIO_24XX. Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap2/3/4: Replace orred CONFIG_ARCH_OMAP2/3/4 with CONFIG_ARCH_OMAP2PLUSTony Lindgren2010-02-15
| | | | | | omap: Replace orred CONFIG_ARCH_OMAP2/3/4 with CONFIG_ARCH_OMAP2PLUS Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap3: Replace ARCH_OMAP34XX with ARCH_OMAP3Tony Lindgren2010-02-15
| | | | | | Replace ARCH_OMAP34XX with ARCH_OMAP3 Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap2: Convert ARCH_OMAP24XX to ARCH_OMAP2Tony Lindgren2010-02-15
| | | | | | Convert ARCH_OMAP24XX to ARCH_OMAP2 Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap2/3: Multiboot compile fixes to compile in omap2 and omap3Tony Lindgren2010-02-15
| | | | | | Allows compiling in omap2 and omap3. Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: define _toggle_gpio_edge_triggering only for OMAP1Uwe Kleine-König2010-01-29
| | | | | | | | | | | | | | | | The only usage of _toggle_gpio_edge_triggering is in an #ifdef CONFIG_ARCH_OMAP1 block, so only provide it if CONFIG_ARCH_OMAP1 is defined, too. This fixes a compiler warning: arch/arm/plat-omap/gpio.c:758: warning: '_toggle_gpio_edge_triggering' defined but not used when compiling for ARCH_OMAP2, ARCH_OMAP3 or ARCH_OMAP4. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: Remove uninitialized warning for gpio.cTony Lindgren2010-01-08
| | | | | | Flags is not used on 15xx. Signed-off-by: Tony Lindgren <tony@atomide.com>
* omap: gpio: Simultaneously requested rising and falling edgeCory Maccarrone2010-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some chips, namely any OMAP1 chips using METHOD_MPUIO, OMAP15xx and OMAP7xx, cannot be setup to respond to on-chip GPIO interrupts in both rising and falling edge directions -- they can only respond to one direction or the other, depending on how the ICR is configured. Additionally, current code forces rising edge detection if both flags are specified: if (trigger & IRQ_TYPE_EDGE_RISING) l |= 1 << gpio; else if (trigger & IRQ_TYPE_EDGE_FALLING) l &= ~(1 << gpio); else goto bad; This change implements a toggle function that will modify the ICR to flip the direction of interrupt for IRQs that are requested with both rising and falling flags. The toggle function is not called for chips and GPIOs it does not apply to through the use of a flip_mask that's added on a per-bank basis. The mask is only set for those GPIOs where a toggle is necessary. Edge detection starts out the same as above with FALLING mode first. The toggle happens on EACH interrupt; without it, we have the following sequence of actions on GPIO transition: ICR GPIO Result 0x1 0 -> 1 (rising) Interrupt 0x1 1 -> 0 (falling) No interrupt (set ICR to 0x0 manually) 0x0 0 -> 1 (rising) No interrupt 0x0 1 -> 0 (falling) Interrupt That is, with the ICR set to 1 for a gpio, only rising edge interrupts are caught, and with it set to 0, only falling edge interrupts are caught. If we add in the toggle, we get this: ICR GPIO Result 0x1 0 -> 1 (rising) Interrupt (ICR set to 0x0) 0x0 1 -> 0 (falling) Interrupt (ICR set to 0x1) 0x1 0 -> 1 ... so, both rising and falling are caught, per the request for both (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING). Signed-off-by: Cory Maccarrone <darkstar6262@gmail.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* const: constify remaining dev_pm_opsAlexey Dobriyan2009-12-15
| | | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* omap: GPIO module enable/disableCharulatha V2009-11-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch disables a GPIO module when all pins of a GPIO module are inactive (clock gating forced at module level) and enables the module when any gpio in the module is requested. The module is enabled only when "mod_usage" indicates that no GPIO in that module is currently active and the GPIO being requested is the 1st one to be active in that module. Each module would be disabled in omap_gpio_free() API when all GPIOs in a particular module becomes inactive. The module is re-enabled in omap_gpio_request() API when a GPIO is requested from the module that was previously disabled. Since individual GPIO's bookkeeping is added in this patch via "mod_usage", the same is used in omap_set_gpio_debounce() & omap_set_gpio_debounce_time() APIs to ensure that the gpio being used is actually "requested" prior to being used (Nishant Menon's <nm@ti.comSuggestion) GPIO module level details are specific to hardware and hence introducing this patch in low level layer (plat-omap/gpio.c) Signed-off-by: Charulatha V <charu@ti.com> Acked-by: Nishanth Menon <nm@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
* Merge 7xx-iosplit-plat-merge with omap-fixesTony Lindgren2009-11-22
|\ | | | | | | Merge branch '7xx-iosplit-plat-merge' into omap-for-linus
| * OMAP3: PM: GPIO context save/restoreRajendra Nayak2009-11-11
| | | | | | | | | | | | | | Add context save and restore to enable off-mode. Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
| * omap: Use ioremap in gpio.cTony Lindgren2009-10-19
| | | | | | | | | | | | Use ioremap in gpio.c Signed-off-by: Tony Lindgren <tony@atomide.com>
| * OMAP7XX: Rename all the rest of the omap730 references in omap1 coreAlistair Buxton2009-10-07
| | | | | | | | | | | | | | | | | | | | | | This patch is part of a series which removes references to omap730 in code which is shared with omap850, replacing them with references to omap7xx. This updates all the remaining omap730 references in miscellaneous local variables, macros and similar. Signed-off-by: Alistair Buxton <a.j.buxton@gmail.com> Reviewed-by: Zebediah C. McClure <zmc@lurian.net>
| * OMAP7XX: Replace omap730 references in irqs.h and all usersAlistair Buxton2009-10-07
| | | | | | | | | | | | | | | | | | | | This patch is part of a series which removes references to omap730 in code which is shared with omap850, replacing them with references to omap7xx. Turns INT_730_* to INT_7XX_* for definitions in irqs.h and all users. Signed-off-by: Alistair Buxton <a.j.buxton@gmail.com> Reviewed-by: Zebediah C. McClure <zmc@lurian.net>
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