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2016-02-17spi: pl022: Remove obsolete struct pl022 members from kerneldocJarkko Nikula1-7/+0
These structure members were removed in 2012 by the commit ffbbdd21329f ("spi: create a message queueing infrastructure"). Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-23spi: pl022: handle EPROBE_DEFER for dmaRabin Vincent1-6/+22
Handle EPROBE_DEFER explicitly so that we ensure that we get the DMA channel specified in the device tree, instead of depending on the DMA controller getting probed before us. Signed-off-by: Rabin Vincent <rabin.vincent@axis.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-04-11Merge remote-tracking branches 'spi/topic/omap-100k', 'spi/topic/omap-uwire', 'spi/topic/pl022', 'spi/topic/pm' and 'spi/topic/pxa2xx' into spi-nextMark Brown1-7/+7
2015-03-06spi: pl022: Fix race in giveback() leading to driver lock-upAlexander Sverdlin1-1/+1
Commit fd316941c ("spi/pl022: disable port when unused") introduced a race, which leads to possible driver lock up (easily reproducible on SMP). The problem happens in giveback() function where the completion of the transfer is signalled to SPI subsystem and then the HW SPI controller is disabled. Another transfer might be setup in between, which brings driver in locked-up state. Exact event sequence on SMP: core0 core1 => pump_transfers() /* message->state == STATE_DONE */ => giveback() => spi_finalize_current_message() => pl022_unprepare_transfer_hardware() => pl022_transfer_one_message => flush() => do_interrupt_dma_transfer() => set_up_next_transfer() /* Enable SSP, turn on interrupts */ writew((readw(SSP_CR1(pl022->virtbase)) | SSP_CR1_MASK_SSE), SSP_CR1(pl022->virtbase)); ... => pl022_interrupt_handler() => readwriter() /* disable the SPI/SSP operation */ => writew((readw(SSP_CR1(pl022->virtbase)) & (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); Lockup! SPI controller is disabled and the data will never be received. Whole SPI subsystem is waiting for transfer ACK and blocked. So, only signal transfer completion after disabling the controller. Fixes: fd316941c (spi/pl022: disable port when unused) Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2015-03-06spi: pl022: Remove dead codeAlexander Sverdlin1-3/+1
"flag" variable does nothing, remove it. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-03-06spi: pl022: Don't touch unspecified bits in interrupt maskAlexander Sverdlin1-1/+6
PL022 Programmers model explicitely states "do not modify undefined register bits". Correct the "all enable" interrupt mask so that it only enables defined ones. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-03-06spi: pl022: Remove incorrect TxFIFO full reportingAlexander Sverdlin1-3/+0
According to PL022 specification, TNF bit states for "Transmit FIFO Not full". So the logic here is inverted. But "Receive Overrun Interrupt", which is handled here, is only triggered on Rx errors. So instead of fixing the if statement, remove the whole message. Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-04PM: Merge the SET*_RUNTIME_PM_OPS() macrosRafael J. Wysocki1-1/+1
The SET_PM_RUNTIME_PM_OPS() and SET_RUNTIME_PM_OPS() macros are identical except that one of them is not empty for CONFIG_PM set, while the other one is not empty for CONFIG_PM_RUNTIME set, respectively. However, after commit b2b49ccbdd54 (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so one of these macros is now redundant. For this reason, replace SET_PM_RUNTIME_PM_OPS() with SET_RUNTIME_PM_OPS() everywhere and redefine the SET_PM_RUNTIME_PM_OPS symbol as SET_RUNTIME_PM_OPS in case new code is starting to use the macro being removed here. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-10-13spi: pl022: Fix incorrect dma_unmap_sgRay Jui1-1/+1
When mapped RX DMA entries are unmapped in an error condition when DMA is firstly configured in the driver, the number of TX DMA entries was passed in, which is incorrect Signed-off-by: Ray Jui <rjui@broadcom.com> Signed-off-by: Mark Brown <broonie@kernel.org> Cc: stable@vger.kernel.org
2014-10-03Merge remote-tracking branches 'spi/topic/pl022', 'spi/topic/pxa2xx', 'spi/topic/rspi', 'spi/topic/sh-msiof' and 'spi/topic/sirf' into spi-nextMark Brown1-1/+63
2014-09-24spi: pl022: Add support for chip select extensionAnders Berg1-1/+58
Add support for a extended PL022 which has an extra register for controlling up to five chip select signals. This controller is found on the AXM5516 SoC. Unfortunately the PrimeCell identification registers are identical to a standard ARM PL022. To work around this, the peripheral ID must be overridden in the device tree using the "arm,primecell-periphid" property with the value 0x000b6022. Signed-off-by: Anders Berg <anders.berg@avagotech.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-18spi: pl022: Add missing error check for devm_kzallocKiran Padwal1-0/+5
Currently this driver is missing a check on the return value of devm_kzalloc, which would cause a NULL pointer dereference in a OOM situation. This patch adds a missing check. Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2014-09-09spi/pl022: Fix error messageRoland Stigge1-1/+1
This patch fixes an error message typo ("not" missing). Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-08-01spi/pl022: Explicitly truncate large bitmaskMark Brown1-1/+1
When building on 64 bit architectures the use of bitwise negation generates constants larger than 32 bits which won't fit in u32s used to represent 32 bit register values on the device. Explicitly cast to let the compiler know that the higher bits are not significant and can be discarded. Signed-off-by: Mark Brown <broonie@linaro.org>
2014-04-29spi: pl022: remove unnecessary OOM messagesJingoo Han1-10/+3
The site-specific OOM messages are unnecessary, because they duplicate the MM subsystem generic OOM message. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-30Merge remote-tracking branches 'spi/topic/omap-uwire', 'spi/topic/omap100k', 'spi/topic/omap2', 'spi/topic/orion', 'spi/topic/pl022', 'spi/topic/qup', 'spi/topic/rspi' and 'spi/topic/s3c24xx' into spi-nextMark Brown1-52/+23
2014-03-06spi: pl022: Don't ignore power domain and amba bus at system suspendUlf Hansson1-36/+18
Previously only the resources controlled by the driver were put into low power state at system suspend. Both the amba bus and a potential power domain were ignored. Moreover, while putting the device into low power state we first brought it back to full power, but for no particular reason. To handle both issues above, use pm_runtime_force_suspend|resume() from the system suspend|resume callbacks. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-03-06spi: pl022: Let runtime PM callbacks be available for CONFIG_PMUlf Hansson1-3/+3
Convert to the SET_PM_RUNTIME_PM macro while defining the runtime PM callbacks. This means the callbacks becomes available for both CONFIG_PM_SLEEP and CONFIG_PM_RUNTIME, which is needed to handle the combinations of these scenarios. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-23spi: Use list_last_entry at appropriate placesAxel Lin1-3/+2
Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-04spi: pl022: Remove redundant pinctrl to default state in probeUlf Hansson1-2/+0
The driver core is now taking care of putting our pins into default state at probe. Thus we can remove the redundant call for it in probe. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-04spi: pl022: Simplify clock handlingUlf Hansson1-12/+3
Make use of clk_prepare_enable and clk_disable_unprepare to simplify code. No functional change. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-02-03spi/pl022: Unprepare clocks while suspendedMark Brown1-2/+2
When the driver was converted to clk_prepare() the suspend path didn't have any changes made so the clock remains prepared throughout the runtime of the driver. Unprepare it when suspended so that any savings that can be made as a result are made. Signed-off-by: Mark Brown <broonie@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
2013-10-25Merge remote-tracking branch 'spi/topic/pl022' into spi-nextMark Brown1-2/+2
2013-10-14spi: pl022: Use dev_info() instead of printk()Jingoo Han1-2/+2
Change raw printk() call to dev_info() to provide a better message to userspace so it can properly identify the device. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-26spi: pl022: use devm_spi_register_master()Jingoo Han1-2/+1
Use devm_spi_register_master() to make cleanup paths simpler. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-17spi: pl022: remove unnecessary amba_set_drvdata()Jingoo Han1-1/+0
The driver core clears the driver data to NULL after device_release or on probe failure. Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-17spi: pl022: Remove redundant breakSachin Kamat1-2/+0
'break' immediately after return has no effect. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-09-01Merge remote-tracking branch 'spi/topic/qspi' into spi-nextMark Brown1-20/+1
2013-09-01Merge remote-tracking branch 'spi/topic/pl022' into spi-nextMark Brown1-2/+2
2013-08-29spi: use dev_get_platdata()Jingoo Han1-1/+2
Use the wrapper function for retrieving the platform data instead of accessing dev->platform_data directly. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-08-22spi: spi-pl022: Fix warning when CONFIG_ARM_LPAE=yFabio Estevam1-2/+2
When CONFIG_ARM_LPAE=y the following build warning is generated: drivers/spi/spi-pl022.c:2178:9: warning: format '%x' expects argument of type 'unsigned int', but argument 2 has type 'resource_size_t' [-Wformat] According to Documentation/printk-formats.txt '%pa' can be used to properly print 'resource_size_t'. Reported-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2013-07-29spi/pl022: Convert to core runtime PMMark Brown1-20/+1
Signed-off-by: Mark Brown <broonie@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2013-07-03Merge tag 'pinctrl-for-v3.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlLinus Torvalds1-62/+8
Pull pin control changes from Linus Walleij: - A large slew of improvements of the Genric pin configuration support, and deployment in four different platforms: Rockchip, Super-H PFC, ABx500 and TZ1090. Support BIAS_BUS_HOLD, get device tree parsing and debugfs support into shape. - We also have device tree support with generic naming conventions for the generic pin configuration. - Delete the unused and confusing direct pinconf API. Now state transitions is *the* way to control pins and multiplexing. - New drivers for Rockchip, TZ1090, and TZ1090 PDC. - Two pin control states related to power management are now handled in the device core: "sleep" and "idle", removing a lot of boilerplate code in drivers. We do not yet know if this is the final word for pin PM, but it already make things a lot easier to handle. - Handle sparse GPIO ranges passing a list of disparate pins, and utilize these in the new BayTrail (x86 Atom SoC) driver. - Make the sunxi (AllWinner) driver handle external interrupts. - Make it possible for pinctrl-single to handle the case where several pins are managed by a single register, and augment it to handle sleep modes. - Cleanups and improvements for the abx500 drivers. - Move Sirf pin control drivers to their own directory, support save/restore of context and add support for the SiRFatlas6 SoC. - PMU muxing for the Dove pinctrl driver. - Finalization and support for VF610 in the i.MX6 pinctrl driver. - Smoothen out various Exynos rough edges. - Generic cleanups of various kinds. * tag 'pinctrl-for-v3.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (82 commits) pinctrl: vt8500: wmt: remove redundant dev_err call in wmt_pinctrl_probe() pinctrl: remove bindings for pinconf options needing more thought pinctrl: remove slew-rate parameter from tz1090 pinctrl: set unit for debounce time pinconfig to usec pinctrl: more clarifications for generic pull configs pinctrl: rip out the direct pinconf API pinctrl-tz1090-pdc: add TZ1090 PDC pinctrl driver pinctrl-tz1090: add TZ1090 pinctrl driver pinctrl: samsung: Staticize drvdata_list pinctrl: rockchip: Add missing irq_gc_unlock() call before return error pinctrl: abx500: rework error path pinctrl: abx500: suppress hardcoded value pinctrl: abx500: factorize code pinctrl: abx500: fix abx500_gpio_get() pinctrl: abx500: fix abx500_pin_config_set() pinctrl: abx500: Add device tree support sh-pfc: Guard DT parsing with #ifdef CONFIG_OF pinctrl: add Intel BayTrail GPIO/pinctrl support pinctrl: fix pinconf_ops::pin_config_dbg_parse_modify kerneldoc pinctrl: Staticize local symbols ... Conflicts: drivers/net/ethernet/ti/davinci_mdio.c drivers/pinctrl/Makefile
2013-06-17spi: pl022: remove unused ret and pins_state variablesFabio Baltieri1-5/+0
Removes the warnings: drivers/spi/spi-pl022.c: In function 'pl022_suspend_resources': drivers/spi/spi-pl022.c:2322:24: warning: unused variable 'pins_state' [-Wunused-variable] drivers/spi/spi-pl022.c:2321:6: warning: unused variable 'ret' [-Wunused-variable] drivers/spi/spi-pl022.c: In function 'pl022_resume_resources': drivers/spi/spi-pl022.c:2334:6: warning: unused variable 'ret' [-Wunused-variable] introduced in: f1c9cf0 spi: pl022: use pinctrl PM helpers Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org> Acked-by: Mark Brown <broonie@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-06-17spi: pl022: use DMA by default when probing from DTLinus Walleij1-0/+1
In the past we controlled the selection of DMA for a certain host by a boolean switch in the platform data. Currently there is no way to enable DMA on a PL022 probed from the device tree. Let's default to trying to obtain DMA channels in the DT case, and then we can always fail (and thus fall back to PIO mode). Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-06-16spi: pl022: use pinctrl PM helpersLinus Walleij1-57/+8
This utilize the new pinctrl core PM helpers to transition the driver to "sleep" and "idle" states, cutting away some boilerplate code. Cc: Hebbar Gururaja <gururaja.hebbar@ti.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Kevin Hilman <khilman@linaro.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Wolfram Sang <wsa@the-dreams.de> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-03-12spi: pl022: use generic DMA slave configuration if possibleArnd Bergmann1-2/+41
With the new OF DMA binding, it is possible to completely avoid the need for platform_data for configuring a DMA channel. In cases where the platform has already been converted, calling dma_request_slave_channel should get all the necessary information from the device tree. Like the patch that converts the dw_dma controller, this is completely untested and is looking for someone to try it out. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Cc: spi-devel-general@lists.sourceforge.net Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Vinod Koul <vinod.koul@linux.intel.com> Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-arm-kernel@lists.infradead.org
2012-12-07spi: Remove HOTPLUG section attributesGrant Likely1-5/+4
CONFIG_HOTPLUG is going away as an option. As result the __dev* markings will be going away. Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit. Bill Pemberton has done most of the legwork on this series. I've used his script to purge the attributes from the drivers/gpio tree. Reported-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2012-10-23Merge tag 'spi-linus' into spi-nextMark Brown1-4/+0
spi: Fixes for v3.7 A bunch of fixes here, mostly minor except for the pl022 which has just been a bit of a shambles all round, the recent runtime PM changes have as far as I can tell never worked so they're just getting thrown out. Conflicts: drivers/spi/spi-pl022.c
2012-10-23spi/pl022: Revert recent runtime PM changesUlf Hansson1-3/+0
[Originally sent by Ulf as two changes, squashed down into one with a redone changelog, thanks to Russell King for analysis. -- broonie] This reverts commit 688723 (spi/pl022: enable runtime PM) and commit 2fb30d (spi/pl022: fix spi-pl022 pm enable at probe). Commit "spi/pl022: enable runtime PM" introduced runtime PM issues as it interacted badly with the work Russell King had done to move core runtime PM handling into the bus. Due to that commit, "spi/pl022: fix spi-pl022 pm enable at probe" was merged to fix part of those issues. Instead of adding another fix, let's clean up and revert everything back to when it was already fine. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Revert "spi/pl022: enable runtime PM" Conflicts: drivers/spi/spi-pl022.c
2012-10-17Merge branch 'spi-pl022' into spi-nextMark Brown1-16/+36
2012-10-17spi/pl022: add IDLE state pin managementPatrice Chotard1-13/+31
This commit allow to put pins in IDLE state in runtime_suspend and in SLEEP state in suspend, corresponding to defined semantics in <linux/pinctrl/pinctrl-state.h>. To do this, just add a boolean parameter runtime to pl022_resume_resources/pl022_suspend_resources which indicates if it's called from PM_RUNTIME callbacks or not. Signed-off-by: Patrice Chotard <patrice.chotard@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17spi/pl022: Activate resourses before deactivate them in suspendUlf Hansson1-0/+3
To be able to deactivate resourses in suspend, the resourses must first be surely active. This is done with a pm_runtime_get_sync. Once the resourses are restored to active state again in resume, the runtime pm usage count can be decreased with a pm_runtime_put. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17spi/pl022: Minor simplification for runtime pmUlf Hansson1-3/+2
In probe pm_runtime_put_autosuspend has the same effect as doing pm_runtime_put. This due to upper layer in driver core is preventing the device from being runtime suspended by a pm_runtime_get*. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-10-17spi/pl022: Revert "spi/pl022: fix spi-pl022 pm enable at probe"Ulf Hansson1-0/+1
This reverts commit 6887237cd7da904184dab2750504040c68f3a080. Commit "spi/pl022: enable runtime PM" introduced runtime PM issues. Due to that commit, "spi/pl022: fix spi-pl022 pm enable at probe" was merged to fix part of those issues. Instead of adding another fix, let's clean up and revert everything back to when it was already fine. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-28spi/pl022: get/put resources on suspend/resumeLinus Walleij1-22/+44
This factors out the resource handling in runtime suspend/resume and also calls it from the ordinary suspend and resume hooks. The semantics require that ordinary PM op suspend is called with runtime PM in resumed mode, so that ordinary suspend can assume that it will e.g. decrease the clock reference counter to 0, runtime resume having previously increased it to 1. Cc: Vipul Kumar Samar <vipulkumar.samar@st.com> Cc: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-28spi/pl022: use more managed resourcesLinus Walleij1-21/+10
This switches the PL022 SPI driver to use devm_* managed resources for IRQ, clocks, ioremap and GPIO. Prior to this, the GPIOs would even leak. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-25Merge tag 'v3.6-rc6' into spi-driversMark Brown1-1/+0
Linux 3.6-rc6 Conflicts: drivers/spi/spi-omap2-mcspi.c
2012-09-25spi/pl022: Devicetree support w/o platform dataRoland Stigge1-5/+34
Even with devicetree support, we needed platform data to provide some data, leading to mixed device tree and platform data. This patch makes it possible to provide all that information via device tree. Now, the data must be provided via platform data _or_ device tree completely. Only in case of DMA where a callback specification is necessary (dma_filter()), platform data is the only option. Signed-off-by: Roland Stigge <stigge@antcom.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-09-20spi/pl022: adopt pinctrl supportPatrice Chotard1-0/+46
Amend the PL022 pin controller to optionally take a pin control handle and set the state of the pins to "default" on boot and runtime resume, and to "sleep" at runtime suspend. This way we will dynamically save power on the SPI busses, for example some electronic designs may be able to ground the pins when unused instead of pull-up. Some pin controllers may want to set the pins as wake-up sources when sleeping. Effect on platforms using the PL022 driver: - If the platform does not use pin control - no semantic effect, the pinctrl stubs will kick in and resolve the situation. - Platforms using this driver and have pin control but no function defined for the PL022 need to either supply a "default" function in their map or enable pinctrl dummies so the driver is satisfied. - Platforms using this driver with hogs for setting up the PL022 pin control - stop using hogs to take the pl022 pin control handle, let the driver handle this. I'be looked at some platforms that may be affected: - SPEAr: appears to define the proper functions in their device trees and not hogging them, so things should be smooth, the driver will simply start to take its pins. - Ux500: the proper function is defined and will be taken properly by the driver. New sleep states introduced by a separate patch to ux500 but no regression, since the default state is sufficient. - U300: old hog deleted as part of this patch. - LPC32xx: does not appear to be using pinctrl. - ARM Integrator IMPD1, RealView & Versatile: does not use pinctrl. Tested-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Patrice Chotard <patrice.chotard@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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