aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-pxa
Commit message (Collapse)AuthorAge
* pxafb: make lubbock/mainstone/zylonite/littleton to use new LCD connection typeeric miao2008-04-30
| | | | | | | | Signed-off-by: eric miao <eric.miao@marvell.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* pxafb: convert fb driver to use ioremap() and __raw_{readl, writel}eric miao2008-04-30
| | | | | | | | | | | | | | | | | | This is part of the effort moving peripheral registers outside of pxa-regs.h, and using ioremap() make it possible the same IP can be re-used on different processors with different registers space As a result, the fixed mapping in pxa_map_io() is removed. The regs-lcd.h can actually moved to where closer to pxafb.c but some of its bit definitions are directly used by various platform code, though this is not a good style. Signed-off-by: eric miao <eric.miao@marvell.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2008-04-29
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: (26 commits) [ARM] pxa: fix 1c104e0e4f6ab396960c058e95e18bdedcac945b [ARM] serial: s3c2410: platform_get_irq() may return signed unnoticed [ARM] am79c961a: platform_get_irq() may return signed unnoticed [ARM] Feroceon: Feroceon-specific WA-cache compatible {copy,clear}_user_page() [ARM] Feroceon: fix function alignment in proc-feroceon.S [ARM] Orion: catch a couple more alternative spellings of PCIe [ARM] Orion: fix orion-ehci platform resource end addresses [ARM] Orion: fix ->map_irq() PCIe bus number check [ARM] Orion: fix ioremap() optimization [ARM] feroceon: remove CONFIG_CPU_CACHE_ROUND_ROBIN check [ARM] feroceon: remove CONFIG_CPU_DCACHE_WRITETHROUGH check kprobes/arm: fix decoding of arithmetic immediate instructions kprobes/arm: fix cache flush address for instruction stub [ARM] 5022/1: Race in ARM MMCI PL18x driver, V2 [ARM] 5021/1: at91: buildfix for sam9263 + PM [ARM] 5018/1: RealView: Fix the ARM11MPCore Oprofile compilation [ARM] 5016/1: AT91: typo in mci configuration for at91cap at91sam9263 [ARM] 5017/1: pxa3xx: Report unsupported wakeup sources in pxa3xx_set_wake() [ARM] 5020/1: magician: remove __devinit marker from pasic3_leds_info [ARM] 5014/1: Cleanup reset state before entering suspend or resetting. ...
| * Merge branches 'pxa' and 'orion-fixes1'Russell King2008-04-29
| |\
| | * [ARM] pxa: fix 1c104e0e4f6ab396960c058e95e18bdedcac945bRussell King2008-04-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | The referenced commit changed the order such that the CPU code was initialised before MFP, resulting in unregistered MFP sysfs objects being referenced. Reverse the link order of these so MFP is initialised before the CPU code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * [ARM] 5017/1: pxa3xx: Report unsupported wakeup sources in pxa3xx_set_wake()Mark Brown2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pxa3xx_set_wake() silently accepts unsupported wake sources, causing users to believe that they have succesfully configured sources that they haven't. Fail the operation instead. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: eric miao <eric.y.miao@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * [ARM] 5020/1: magician: remove __devinit marker from pasic3_leds_infoPhilipp Zabel2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | Platform data must not be marked with __devinit. Even __devinitdata would be wrong as the platform driver can be compiled as a module. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * [ARM] 5014/1: Cleanup reset state before entering suspend or resetting.Dmitry Baryshkov2008-04-24
| | | | | | | | | | | | | | | | | | | | | | | | The kernel should clean stale bits from reset status, so that they won't confuse the bootloader. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * [ARM] 5008/1: magician: add magician specific input GPIOs to MFP configPhilipp Zabel2008-04-21
| | | | | | | | | | | | | | | | | | | | | | | | Some input pin configuration that is not handled by drivers. This should serve mostly as documentation. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * [ARM] 5007/1: magician: properly request GPIOs used by the machine code itselfPhilipp Zabel2008-04-21
| | | | | | | | | | | | | | | | | | | | | Registers some GPIOs used in magician.c with the GPIO API. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * [ARM] 5006/1: Gumstix GPIO header fixup and defconfig fixupJaya Kumar2008-04-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds the include of the GPIO header needed to make gumstix build. The defconfig is updated to 2.6.25 and disables PCMCIA since that has not yet been implemented for gumstix. Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | i2c: Convert most new-style drivers to use module aliasingJean Delvare2008-04-29
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | Based on earlier work by Jon Smirl and Jochen Friedrich. Update most new-style i2c drivers to use standard module aliasing instead of the old driver_name/type driver matching scheme. I've left the video drivers apart (except for SoC camera drivers) as they're a bit more diffcult to deal with, they'll have their own patch later. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Jon Smirl <jonsmirl@gmail.com> Cc: Jochen Friedrich <jochen@scram.de>
* | Merge branch 'for-linus' of ↵Linus Torvalds2008-04-21
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/juhl/trivial: (24 commits) DOC: A couple corrections and clarifications in USB doc. Generate a slightly more informative error msg for bad HZ fix typo "is" -> "if" in Makefile ext*: spelling fix prefered -> preferred DOCUMENTATION: Use newer DEFINE_SPINLOCK macro in docs. KEYS: Fix the comment to match the file name in rxrpc-type.h. RAID: remove trailing space from printk line DMA engine: typo fixes Remove unused MAX_NODES_SHIFT MAINTAINERS: Clarify access to OCFS2 development mailing list. V4L: Storage class should be before const qualifier (sn9c102) V4L: Storage class should be before const qualifier sonypi: Storage class should be before const qualifier intel_menlow: Storage class should be before const qualifier DVB: Storage class should be before const qualifier arm: Storage class should be before const qualifier ALSA: Storage class should be before const qualifier acpi: Storage class should be before const qualifier firmware_sample_driver.c: fix coding style MAINTAINERS: Add ati_remote2 driver ... Fixed up trivial conflicts in firmware_sample_driver.c
| * arm: Storage class should be before const qualifierTobias Klauser2008-04-21
| | | | | | | | | | | | | | | | | | | | | | The C99 specification states in section 6.11.5: The placement of a storage-class specifier other than at the beginning of the declaration specifiers in a declaration is an obsolescent feature. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
* | [ARM] pxa: Phycore pcm-990-specific code for the PXA270 Quick Capture driverGuennadi Liakhovetski2008-04-19
| | | | | | | | | | | | | | Platform-specific code for Phytec's phyCORE-PXA270 platform Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: V4L2 soc_camera driver for PXA270Guennadi Liakhovetski2008-04-19
| | | | | | | | | | | | | | | | | | This patch adds a driver for the Quick Capture Interface on the PXA270. It is based on the original driver from Intel, but has been re-worked multiple times since then, now it also supports the V4L2 API. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: initialise PXA devices before platform init codeRussell King2008-04-19
| | | | | | | | | | | | | | | | Initialise PXA devices before platform initialisation, so that platforms can parent devices to these. Acked-by: eric miao <ymiao3@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 5002/1: tosa: add two more ledsDmitry Baryshkov2008-04-19
| | | | | | | | | | | | | | | | | | This adds support for two more leds: the wlan one (found in SL-6000W and SL-6000L) and the blutooth one (found in SL-6000W). Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 5004/1: Tosa: make several unreferenced structures static.Dmitry Baryshkov2008-04-19
| | | | | | | | | | | | | | | | | | | | | | Now that scoop gpio's are converted to generic_gpio, tosascoop_device and tosascoop_jc_device don't have to be exported. Also make tosa_gpio_* static Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 5003/1: Shut up sparse warningsDmitry Baryshkov2008-04-19
| | | | | | | | | | | | | | Shut up sparse warnings by making GPIO_IRQ_MASK unisgned Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4976/1: zylonite: Configure GPIO for WM9713 IRQ lineMark Brown2008-04-19
| | | | | | | | | | | | | | | | Set up the IRQ line for the WM9713 device on the Zylonite. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: eric miao <eric.y.miao@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4973/1: Tosa: use leds-gpio driver.Dmitry Baryshkov2008-04-19
| | | | | | | | | | | | | | | | Now as the scoop pins are covered by the generic gpio API, we can use leds-gpio driver instead of special leds-tosa. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4972/1: Tosa: convert scoop GPIOs usage to generic gpio codeDmitry Baryshkov2008-04-19
| | | | | | | | | | | | | | | | Convert set/reset_scoop_gpio to generic gpio calls. This patch depends on the pxaficp_ir hooks patch. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: lubbock: move mis-placed SPI infoRussell King2008-04-19
| | | | | | | | | | | | | | | | The SPI information got placed in the middle of the SMC91x data. Lets move it up a few lines so that we keep related things grouped together. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4970/1: tosa: correct gpio used for wake up.Dmitry Baryshkov2008-04-19
| | | | | | | | | | | | | | | | | | TOSA_GPIO_ON_KEY can't wakeup the device. But the board provides TOSA_GPIO_POWERON which is OR of (on_ac) and (on_button). Use it for wake up. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4966/1: magician: add MFP pin configurationPhilipp Zabel2008-04-19
| | | | | | | | | | | | | | | | | | | | Although the GPIO alternate functions should be correctly set by the bootloader, configure them here to be sure. To save power, FFUART/BTUART/STUART are left unconfigured (output, low) until they are needed by pxaficp or the magician GSM chipset driver. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4965/1: magician: use htc-pasic3,leds-pasic3,ds1wm,leds-gpioPhilipp Zabel2008-04-19
| | | | | | | | | | | | | | | | This patch enables LEDs and the 1-wire bus (connected to a DS2760 battery monitor) on the magician. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4958/2: tosa: fix i2c registration.Dmitry Baryshkov2008-04-19
| | | | | | | | | | | | | | Add a call to pxa_set_i2c_info() to force i2c registration Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4960/1: Rewrite tosa pin configuration to use MFP tables.Dmitry Baryshkov2008-04-19
| | | | | | | | | | | | | | | | | | Clean up all pins configuration to use currently proposed MFP table schema. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Acked-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4953/1: magician: add backlight power switching GPIOsPhilipp Zabel2008-04-19
| | | | | | | | | | Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4952/1: magician: add LCD detection, LCD power switching, update pxafb ↵Philipp Zabel2008-04-19
| | | | | | | | | | | | | | | | | | | | | | | | settings All magician devices I've encountered so far have featured the Toppoly TD028STEB1 display, so the Samsung LTP280QV support is untested. The power-on sequence is not correct because pxafb doesn't yet support enabling the LCD controller in the middle of the it. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4951/1: magician: enable external power supply (pda_power) driverPhilipp Zabel2008-04-19
| | | | | | | | | | Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4950/1: magician: enable MMC supportPhilipp Zabel2008-04-19
| | | | | | | | | | Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4949/1: magician: enable flash VPP GPIO and build in MTD, ↵Philipp Zabel2008-04-19
| | | | | | | | | | | | | | | | | | | | physmap-flash and JFFS2 This enables rootfs on StrataFlash if the bootloader supplies the partition list. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4948/1: magician: use htc-egpio to drive the GPIO/IRQ expander CPLDPhilipp Zabel2008-04-19
| | | | | | | | | | | | | | needed for power management (audio, BT, charging, GSM, LCD, SD), GSM, flash and SD operation and audio routing. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4944/2: magician: enable i2c busPhilipp Zabel2008-04-19
| | | | | | | | | | | | | | | | Since recent PXA changes the (non-power-)I2C bus has to be explicitly enabled from board initialisation code. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4942/1: magician: fix the backlight driver namePhilipp Zabel2008-04-19
| | | | | | | | | | | | | | corgi_bl was renamed to generic_bl. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4946/1: pxa3xx: Print an error if we refuse to suspendMark Brown2008-04-19
| | | | | | | | | | | | | | | | | | | | The PXA3xx will not suspend if there are no wakeup sources configured. Print a diagnostic message to make it easier for the user to see what's happening. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: eric miao <eric.y.miao@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4901/3: mainstone: Register primary I2C busMark Brown2008-04-19
| | | | | | | | | | | | | | | | Mainstone has the primary I2C bus exposed for use on plugin modules. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: eric miao <eric.y.miao@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] 4867/1: Adds flash, udc, mci support for gumstix F boardsJaya Kumar2008-04-19
| | | | | | | | | | | | | | | | | | This patch implements support for Gumstix-F flash, udc and mci. Fixes since the last time are: - Steve Sakoman as maintainer - cleanup for udc and mci setup Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: add keypad support for littletoneric miao2008-04-19
| | | | | | | | | | Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: add keypad support for zyloniteeric miao2008-04-19
| | | | | | | | | | Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: add partial keypad support for mainstoneeric miao2008-04-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This is partial because mainstone's keypad is really special, some of the keys like '1', '2', ... are actually connected to two row/column juntions, thus pressing '1' is equivalent to pressing 'A' & 'H'. This is really brain damanged since it makes distinguishing between pressing '1' and multiple keys pressing of 'A' & 'H' difficult. So these special keys are not supported for the time being. Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: add pxa27x_keypad device and pxa_set_keypad_info()eric miao2008-04-19
| | | | | | | | | | | | | | also update the clk definitions in pxa27x and pxa3xx. Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: use gpio_keys.c to support mainstone's wakeup switch of GPIO1eric miao2008-04-19
| | | | | | | | | | | | | | | | NOTE: currently don't know if the key code of KEY_SUSPEND is fit for such usage. Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: allow dynamic enable/disable of GPIO wakeup for pxa{25x,27x}eric miao2008-04-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Changes include: 1. rename MFP_LPM_WAKEUP_ENABLE into MFP_LPM_CAN_WAKEUP to indicate the board capability of this pin to wakeup the system 2. add gpio_set_wake() and keypad_set_wake() to allow dynamically enable/disable wakeup from GPIOs and keypad GPIO * these functions are currently kept in mfp-pxa2xx.c due to their dependency to the MFP configuration 3. pxa2xx_mfp_config() only gives early warning if MFP_LPM_CAN_WAKEUP is set on incorrect pins So that the GPIO's wakeup capability is now decided by the following: a) processor's capability: (only those GPIOs which have dedicated bits within PWER/PRER/PFER can wakeup the system), this is initialized by pxa{25x,27x}_init_mfp() b) board design decides: - whether the pin is designed to wakeup the system (some of the GPIOs are configured as other functions, which is not intended to be a wakeup source), by OR'ing the pin config with MFP_LPM_CAN_WAKEUP - which edge the pin is designed to wakeup the system, this may depends on external peripherals/connections, which is totally board specific; this is indicated by MFP_LPM_EDGE_* c) the corresponding device's (most likely the gpio_keys.c) wakeup attribute: Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: use new pin configuration mechanism for lubbockeric miao2008-04-19
| | | | | | | | | | Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: use new pin configuration mechanism for mainstoneeric miao2008-04-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. the following code to configure PGSRx is no way portable and intuitive: - PGSR0 = 0x00008800; - PGSR1 = 0x00000002; - PGSR2 = 0x0001FC00; - PGSR3 = 0x00001F81; this is removed as low power state has already been encoded in the pin configuration definitions. Note: there is no specific reason for some of the GPIOs to drive high in low power mode as indicated by the above setting, those bits are ignored, and the result is validated to work. 2. the following code to configure GPIO wakeup is removed as this is now totally handled by pxa2xx_mfp_config(): - PWER = 0xC0000002; - PRER = 0x00000002; - PFER = 0x00000002; Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: move ARRAY_AND_SIZE definition to generic.heric miao2008-04-19
| | | | | | | | | | | | | | for use by other platforms Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | [ARM] pxa: add MFP-alike pin configuration support for pxa{25x, 27x}eric miao2008-04-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pin configuration on pxa{25x,27x} has now separated from generic GPIO into dedicated mfp-pxa2xx.c by this patch. The name "mfp" is borrowed from pxa3xx and is used here to alert the difference between the two concepts: pin configuration and generic GPIOs. A GPIO can be called a "GPIO" _only_ when the corresponding pin is configured so. A pin configuration on pxa{25x,27x} is composed of: - alternate function selection (or pin mux as commonly called) - low power state or sleep state - wakeup enabling from low power mode The following MFP_xxx bit definitions in mfp.h are re-used: - MFP_PIN(x) - MFP_AFx - MFP_LPM_DRIVE_{LOW, HIGH} - MFP_LPM_EDGE_* Selecting alternate function on pxa{25x, 27x} involves configuration of GPIO direction register GPDRx, so a new bit and MFP_DIR_{IN, OUT} are introduced. And pin configurations are defined by the following two macros: - MFP_CFG_IN : for input alternate functions - MFP_CFG_OUT : for output alternate functions Every configuration should provide a low power state if it configured as output using MFP_CFG_OUT(). As a general guideline, the low power state should be decided to minimize the overall power dissipation. As an example, it is better to drive the pin as high level in low power mode if the GPIO is configured as an active low chip select. Pins configured as GPIO are defined by MFP_CFG_IN(). This is to avoid side effects when it is firstly configured as output. The actual direction of the GPIO is configured by gpio_direction_{input, output} Wakeup enabling on pxa{25x, 27x} is actually GPIO based wakeup, thus the device based enable_irq_wake() mechanism is not applicable here. E.g. invoking enable_irq_wake() with a GPIO IRQ as in the following code to enable OTG wakeup is by no means portable and intuitive, and it is valid _only_ when GPIO35 is configured as USB_P2_1: enable_irq_wake( gpio_to_irq(35) ); To make things worse, not every GPIO is able to wakeup the system. Only a small number of them can, on either rising or falling edge, or when level is high (for keypad GPIOs). Thus, another new bit is introduced to indicate that the GPIO will wakeup the system: - MFP_LPM_WAKEUP_ENABLE The following macros can be used in platform code, and be OR'ed to the GPIO configuration to enable its wakeup: - WAKEUP_ON_EDGE_{RISE, FALL, BOTH} - WAKEUP_ON_LEVEL_HIGH The WAKEUP_ON_LEVEL_HIGH is used for keypad GPIOs _only_, there is no edge settings for those GPIOs. These WAKEUP_ON_* flags OR'ed on wrong GPIOs will be ignored in case that platform code author is careless enough. The tradeoff here is that the wakeup source is fully determined by the platform configuration, instead of enable_irq_wake(). Signed-off-by: eric miao <eric.miao@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-09 01:19:53 -0500