summaryrefslogtreecommitdiffstats
path: root/drivers/gpio
AgeCommit message (Collapse)AuthorFilesLines
2015-11-06Merge tag 'asm-generic-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic Pull asm-generic cleanups from Arnd Bergmann: "The asm-generic changes for 4.4 are mostly a series from Christoph Hellwig to clean up various abuses of headers in there. The patch to rename the io-64-nonatomic-*.h headers caused some conflicts with new users, so I added a workaround that we can remove in the next merge window. The only other patch is a warning fix from Marek Vasut" * tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: asm-generic: temporarily add back asm-generic/io-64-nonatomic*.h asm-generic: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations gpio-mxc: stop including <asm-generic/bug> n_tracesink: stop including <asm-generic/bug> n_tracerouter: stop including <asm-generic/bug> mlx5: stop including <asm-generic/kmap_types.h> hifn_795x: stop including <asm-generic/kmap_types.h> drbd: stop including <asm-generic/kmap_types.h> move count_zeroes.h out of asm-generic move io-64-nonatomic*.h out of asm-generic
2015-11-05Merge tag 'spi-v4.4' of ↵Linus Torvalds4-5/+0
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "Quite a lot of activity in SPI this cycle, almost all of it in drivers with a few minor improvements and tweaks in the core. - Updates to pxa2xx to support Intel Broxton and multiple chip selects. - Support for big endian in the bcm63xx driver. - Multiple slave support for the mt8173 - New driver for the auxiliary SPI controller in bcm2835 SoCs. - Support for Layerscale SoCs in the Freescale DSPI driver" * tag 'spi-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (87 commits) spi: pxa2xx: Rework self-initiated platform data creation for non-ACPI spi: pxa2xx: Add support for Intel Broxton spi: pxa2xx: Detect number of enabled Intel LPSS SPI chip select signals spi: pxa2xx: Add output control for multiple Intel LPSS chip selects spi: pxa2xx: Use LPSS prefix for defines that are Intel LPSS specific spi: Add DSPI support for layerscape family spi: ti-qspi: improve ->remove() callback spi/spi-xilinx: Fix race condition on last word read spi: Drop owner assignment from spi_drivers spi: Add THIS_MODULE to spi_driver in SPI core spi: Setup the master controller driver before setting the chipselect spi: dw: replace magic constant by DW_SPI_DR spi: mediatek: mt8173 spi multiple devices support spi: mediatek: handle controller_data in mtk_spi_setup spi: mediatek: remove mtk_spi_config spi: mediatek: Update document devicetree bindings to support multiple devices spi: fix kernel-doc warnings about missing return desc in spi.c spi: fix kernel-doc warnings about missing return desc in spi.h spi: pxa2xx: Align a few defines spi: pxa2xx: Save other reg_cs_ctrl bits when configuring chip select ...
2015-11-04Merge tag 'pm+acpi-4.4-rc1-1' of ↵Linus Torvalds3-47/+119
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm Pull power management and ACPI updates from Rafael Wysocki: "Quite a new features are included this time. First off, the Collaborative Processor Performance Control interface (version 2) defined by ACPI will now be supported on ARM64 along with a cpufreq frontend for CPU performance scaling. Second, ACPI gets a new infrastructure for the early probing of IRQ chips and clock sources (along the lines of the existing similar mechanism for DT). Next, the ACPI core and the generic device properties API will now support a recently introduced hierarchical properties extension of the _DSD (Device Specific Data) ACPI device configuration object. If the ACPI platform firmware uses that extension to organize device properties in a hierarchical way, the kernel will automatically handle it and make those properties available to device drivers via the generic device properties API. It also will be possible to build the ACPICA's AML interpreter debugger into the kernel now and use that to diagnose AML-related problems more efficiently. In the future, this should make it possible to single-step AML execution and do similar things. Interesting stuff, although somewhat experimental at this point. Finally, the PM core gets a new mechanism that can be used by device drivers to distinguish between suspend-to-RAM (based on platform firmware support) and suspend-to-idle (or other variants of system suspend the platform firmware is not involved in) and possibly optimize their device suspend/resume handling accordingly. In addition to that, some existing features are re-organized quite substantially. First, the ACPI-based handling of PCI host bridges on x86 and ia64 is unified and the common code goes into the ACPI core (so as to reduce code duplication and eliminate non-essential differences between the two architectures in that area). Second, the Operating Performance Points (OPP) framework is reorganized to make the code easier to find and follow. Next, the cpufreq core's sysfs interface is reorganized to get rid of the "primary CPU" concept for configurations in which the same performance scaling settings are shared between multiple CPUs. Finally, some interfaces that aren't necessary any more are dropped from the generic power domains framework. On top of the above we have some minor extensions, cleanups and bug fixes in multiple places, as usual. Specifics: - ACPICA update to upstream revision 20150930 (Bob Moore, Lv Zheng). The most significant change is to allow the AML debugger to be built into the kernel. On top of that there is an update related to the NFIT table (the ACPI persistent memory interface) and a few fixes and cleanups. - ACPI CPPC2 (Collaborative Processor Performance Control v2) support along with a cpufreq frontend (Ashwin Chaugule). This can only be enabled on ARM64 at this point. - New ACPI infrastructure for the early probing of IRQ chips and clock sources (Marc Zyngier). - Support for a new hierarchical properties extension of the ACPI _DSD (Device Specific Data) device configuration object allowing the kernel to handle hierarchical properties (provided by the platform firmware this way) automatically and make them available to device drivers via the generic device properties interface (Rafael Wysocki). - Generic device properties API extension to obtain an index of certain string value in an array of strings, along the lines of of_property_match_string(), but working for all of the supported firmware node types, and support for the "dma-names" device property based on it (Mika Westerberg). - ACPI core fix to parse the MADT (Multiple APIC Description Table) entries in the order expected by platform firmware (and mandated by the specification) to avoid confusion on systems with more than 255 logical CPUs (Lukasz Anaczkowski). - Consolidation of the ACPI-based handling of PCI host bridges on x86 and ia64 (Jiang Liu). - ACPI core fixes to ensure that the correct IRQ number is used to represent the SCI (System Control Interrupt) in the cases when it has been re-mapped (Chen Yu). - New ACPI backlight quirk for Lenovo IdeaPad S405 (Hans de Goede). - ACPI EC driver fixes (Lv Zheng). - Assorted ACPI fixes and cleanups (Dan Carpenter, Insu Yun, Jiri Kosina, Rami Rosen, Rasmus Villemoes). - New mechanism in the PM core allowing drivers to check if the platform firmware is going to be involved in the upcoming system suspend or if it has been involved in the suspend the system is resuming from at the moment (Rafael Wysocki). This should allow drivers to optimize their suspend/resume handling in some cases and the changes include a couple of users of it (the i8042 input driver, PCI PM). - PCI PM fix to prevent runtime-suspended devices with PME enabled from being resumed during system suspend even if they aren't configured to wake up the system from sleep (Rafael Wysocki). - New mechanism to report the number of a wakeup IRQ that woke up the system from sleep last time (Alexandra Yates). - Removal of unused interfaces from the generic power domains framework and fixes related to latency measurements in that code (Ulf Hansson, Daniel Lezcano). - cpufreq core sysfs interface rework to make it handle CPUs that share performance scaling settings (represented by a common cpufreq policy object) more symmetrically (Viresh Kumar). This should help to simplify the CPU offline/online handling among other things. - cpufreq core fixes and cleanups (Viresh Kumar). - intel_pstate fixes related to the Turbo Activation Ratio (TAR) mechanism on client platforms which causes the turbo P-states range to vary depending on platform firmware settings (Srinivas Pandruvada). - intel_pstate sysfs interface fix (Prarit Bhargava). - Assorted cpufreq driver (imx, tegra20, powernv, integrator) fixes and cleanups (Bai Ping, Bartlomiej Zolnierkiewicz, Shilpasri G Bhat, Luis de Bethencourt). - cpuidle mvebu driver cleanups (Russell King). - OPP (Operating Performance Points) framework code reorganization to make it more maintainable (Viresh Kumar). - Intel Broxton support for the RAPL (Running Average Power Limits) power capping driver (Amy Wiles). - Assorted power management code fixes and cleanups (Dan Carpenter, Geert Uytterhoeven, Geliang Tang, Luis de Bethencourt, Rasmus Villemoes)" * tag 'pm+acpi-4.4-rc1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (108 commits) cpufreq: postfix policy directory with the first CPU in related_cpus cpufreq: create cpu/cpufreq/policyX directories cpufreq: remove cpufreq_sysfs_{create|remove}_file() cpufreq: create cpu/cpufreq at boot time cpufreq: Use cpumask_copy instead of cpumask_or to copy a mask cpufreq: ondemand: Drop unnecessary locks from update_sampling_rate() PM / Domains: Merge measurements for PM QoS device latencies PM / Domains: Don't measure ->start|stop() latency in system PM callbacks PM / clk: Fix broken build due to non-matching code and header #ifdefs ACPI / Documentation: add copy_dsdt to ACPI format options ACPI / sysfs: correctly check failing memory allocation ACPI / video: Add a quirk to force native backlight on Lenovo IdeaPad S405 ACPI / CPPC: Fix potential memory leak ACPI / CPPC: signedness bug in register_pcc_channel() ACPI / PAD: power_saving_thread() is not freezable ACPI / PM: Fix incorrect wakeup IRQ setting during suspend-to-idle ACPI: Using correct irq when waiting for events ACPI: Use correct IRQ when uninstalling ACPI interrupt handler cpuidle: mvebu: disable the bind/unbind attributes and use builtin_platform_driver cpuidle: mvebu: clean up multiple platform drivers ...
2015-11-04Merge remote-tracking branches 'spi/topic/omap-100k', ↵Mark Brown4-5/+0
'spi/topic/omap-uwire', 'spi/topic/owner', 'spi/topic/pxa' and 'spi/topic/pxa2xx' into spi-next
2015-11-03Merge branch 'irq-core-for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: "The irq departement delivers: - Rework the irqdomain core infrastructure to accomodate ACPI based systems. This is required to support ARM64 without creating artificial device tree nodes. - Sanitize the ACPI based ARM GIC initialization by making use of the new firmware independent irqdomain core - Further improvements to the generic MSI management - Generalize the irq migration on CPU hotplug - Improvements to the threaded interrupt infrastructure - Allow the migration of "chained" low level interrupt handlers - Allow optional force masking of interrupts in disable_irq[_nosysnc] - Support for two new interrupt chips - Sigh! - A larger set of errata fixes for ARM gicv3 - The usual pile of fixes, updates, improvements and cleanups all over the place" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (71 commits) Document that IRQ_NONE should be returned when IRQ not actually handled PCI/MSI: Allow the MSI domain to be device-specific PCI: Add per-device MSI domain hook of/irq: Use the msi-map property to provide device-specific MSI domain of/irq: Split of_msi_map_rid to reuse msi-map lookup irqchip/gic-v3-its: Parse new version of msi-parent property PCI/MSI: Use of_msi_get_domain instead of open-coded "msi-parent" parsing of/irq: Use of_msi_get_domain instead of open-coded "msi-parent" parsing of/irq: Add support code for multi-parent version of "msi-parent" irqchip/gic-v3-its: Add handling of PCI requester id. PCI/MSI: Add helper function pci_msi_domain_get_msi_rid(). of/irq: Add new function of_msi_map_rid() Docs: dt: Add PCI MSI map bindings irqchip/gic-v2m: Add support for multiple MSI frames irqchip/gic-v3: Fix translation of LPIs after conversion to irq_fwspec irqchip/mxs: Add Alphascale ASM9260 support irqchip/mxs: Prepare driver for hardware with different offsets irqchip/mxs: Panic if ioremap or domain creation fails irqdomain: Documentation updates irqdomain/msi: Use fwnode instead of of_node ...
2015-11-01gpio: fix up SPI submenuLinus Walleij1-16/+18
- Relax dependencies on SPI_MASTER for drivers in the SPI menu that already has this dependency. - Move out the expander that would be hidden for I2C access if SPI_MASTER was not selected. Tentatively create a separate menu for this. - Move the ZX SoC driver to memory-mapped drivers, this must be a mistake and only worked because the system has an SPI master enabled at the same time. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-11-01gpio: drop surplus I2C dependenciesLinus Walleij1-6/+1
The I2C expander menu already depends on I2C, drop subdependecies on individual drivers. Keep the instances of depends on I2C=y though, so these are still restricted to the compiled-in case. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-11-01gpio: drop surplus X86 dependenciesLinus Walleij1-5/+2
Port-mapped I/O depends on X86 already, so individual drivers need not specify this dependency. Suggested-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-31gpio / ACPI: Allow shared GPIO event to be read via operation regionMika Westerberg1-1/+20
In Microsoft Surface3 the GPIO detecting lid state is shared between GPIO event and operation region. Below is simplied version of the DSDT from Surface3 including relevant parts: Scope (GPO0) { Name (_AEI, ResourceTemplate () { GpioInt (Edge, ActiveBoth, Shared, PullNone, 0x0000, "\\_SB.GPO0", 0x00, ResourceConsumer, , ) { // Pin list 0x004C } }) OperationRegion (GPOR, GeneralPurposeIo, Zero, One) Field (GPOR, ByteAcc, NoLock, Preserve) { Connection ( GpioIo (Shared, PullNone, 0x0000, 0x0000, IoRestrictionNone, "\\_SB.GPO0", 0x00, ResourceConsumer,,) { // Pin list 0x004C } ), HELD, 1 } Method (_E4C, 0, Serialized) // _Exx: Edge-Triggered GPE { If ((HELD == One)) { ^^LID.LIDB = One } Else { ^^LID.LIDB = Zero Notify (LID, 0x80) // Status Change } Notify (^^PCI0.SPI1.NTRG, One) // Device Check } } When GPIO 0x4c changes we call ASL method _E4C which tries to read HELD field (the same GPIO). This triggers following error on the console: ACPI Error: Method parse/execution failed [\_SB.GPO0._E4C] (Node ffff88013f4b4438), AE_ERROR (20150930/psparse-542) The error happens because ACPI GPIO operation region handler (acpi_gpio_adr_space_handler()) tries to acquire the very same GPIO which returns an error (-EBUSY) because the GPIO is already reserved for the GPIO event. Fix this so that we "borrow" the event GPIO if we find the GPIO belongs to an event. Allow this only for GPIOs that are read. To be able to go through acpi_gpio->events list for operation region access we need to make sure the list is properly initialized whenever GPIO chip is registered. Link: https://bugzilla.kernel.org/show_bug.cgi?id=106571 Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-31gpio: group port-mapped I/O drivers in a menuLinus Walleij1-77/+78
Create a Kconfig submenu for drivers using X86 port-mapped I/O and depend on X86 for this. Suggested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Cc: William Breathitt Gray <vilhelm.gray@gmail.com> Cc: Andreas Bofjall <andreas@gazonk.org> Cc: Diego Elio Pettenò <flameeyes@flameeyes.eu> Cc: Daniel Krueger <daniel.krueger@systec-electronic.com> Cc: Bruno Randolf <br1@einfach.org> Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Acked-by: Simon Guinot <simon.guinot@sequanux.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-28spi: Drop owner assignment from spi_driversAndrew F. Davis4-5/+0
An spi_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Andrew F. Davis <afd@ti.com> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-27gpio: xilinx: Drop architecture dependenciesSoren Brinkmann1-1/+1
The driver does not have any real architecture dependencies. To avoid listing each architecture that might use this driver on some FPGA-enabled platform, drop these dependencies. Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Acked-by: Moritz Fischer <moritz.fischer@ettus.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-27gpio: generic: Revert to old error handling in bgpio_mapGuenter Roeck1-1/+1
Returning an error instead of NULL in bgpio_map if platform_get_resource_byname does not find a resource was introduced with commit cf3f2a2c8bae ("gpio: generic: improve error handling in bgpio_map"). This results in several qemu runtime failures with default and non-default configurations, if attempts are made to boot from mmcblk0. Examples for failures with multi_v7_defconfig are Machine: vexpress-a9 dtb: vexpress-v2p-ca9 Machine: vexpress-a15 dtb: vexpress-v2p-ca15-tc1 Crash: VFS: Cannot open root device "mmcblk0" or unknown-block(0,0): error -6 Please append a correct "root=" boot option; here are the available partitions: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) Looking into the code, always returning an error if bgpio_map fails does not appear to make much sense, since the code in bgpio_setup_io specifically supports some of the resources to be NULL. Fixes: cf3f2a2c8bae ("gpio: generic: improve error handling in bgpio_map") Cc: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-27gpio: Add GPIO support for the ACCES 104-IDIO-16William Breathitt Gray3-0/+227
The ACCES 104-IDIO-16 family of PC/104 utility boards feature 16 optically isolated inputs and 16 optically isolated FET solid state outputs. This driver provides GPIO support for these 32 channels of digital I/O. Change-of-State detection interrupts are not supported. GPIO 0-15 correspond to digital outputs 0-15, while GPIO 16-31 correspond to digital inputs 0-15. The base port address for the device may be set via the idio_16_base module parameter. Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-26gpio: driver for AMD PromontoryYD Tseng3-0/+269
This patch adds a new GPIO driver for AMD Promontory chip. This GPIO controller is enumerated by ACPI and the ACPI compliant hardware ID is AMDF030. Change history: v2: 1. fix coding style 2. registers renaming v3: 1. change include file 2. fix coding style 3. remove module_init/exit, add module_platform_driver 4. remove MODULE_ALIAS v4: 1. change TOTAL_GPIO_PINS to PT_TOTAL_GPIO 2. remove PCI dependency in Kconfig 3. fix subject line Signed-off-by: YD Tseng <Yd_Tseng@asmedia.com.tw> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-25Merge branch 'device-properties'Rafael J. Wysocki3-47/+119
* device-properties: ACPI / property: Fix subnode lookup scope for data-only subnodes acpi-dma: Add support for "dma-names" device property device property: Add fwnode_property_match_string() ACPI / property: Extend device_get_next_child_node() to data-only nodes ACPI / gpio: Split acpi_get_gpiod_by_index() ACPI / property: Extend fwnode_property_* to data-only subnodes ACPI / property: Expose data-only subnodes via sysfs ACPI / property: Add support for data-only subnodes ACPI / property: Add routine for extraction of _DSD properties
2015-10-22gpio: xlp: Convert to use gpiolib irqchip helpersKamlakant Patel2-11/+12
commit "325f0a (MIPS: Netlogic: Use chip_data for irq_chip methods)" Updates "mips/netlogic/common/irq.c" to use chip_data to store interrupt controller data pointer. Before this commit handler_data was used to store interrupt controller data which caused errors while using gpiochip_set_chained_irqchip. Update XLP GPIO driver to use the gpiolib irqchip helpers. And add missing depends on OF_GPIO in Kconfig. Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-19gpio/xilinx: enable for MIPSZubair Lutfullah Kakakhel1-1/+1
MIPSfpga uses the axi gpio controller. Enable the driver for MIPS. Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-16gpiolib: Add and use OF_GPIO_SINGLE_ENDED flagLaurent Pinchart1-2/+18
The flag matches the DT GPIO_SINGLE_ENDED flag and allows drivers to parse and use the DT flag to handle single-ended (open-drain or open-source) GPIOs. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-16gpiolib: Split GPIO flags parsing and GPIO configurationLaurent Pinchart2-20/+40
When requesting a GPIO through the legacy or the gpiod_* API the gpiochip request operation is first called and then the GPIO flags are parsed and the GPIO is configured. This prevents the gpiochip from rejecting the request if the flags are not supported by the device. To fix this split the parse-and-configure operation in two and parse flags before requesting the GPIO. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-16gpio: pl061: use the generic request/free implementationsJonas Gorski1-28/+4
Instead of storing in the chip data whether the chip uses pinctrl and conditionally call pinctrl_{request,free}_gpio, just don't populate request/free in that case. This makes the implementations trivial and the same as the generic implementations, thus we can just use them. Signed-off-by: Jonas Gorski <jogo@openwrt.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-16gpio: gpio-xz: use the generic request/free implementationsJonas Gorski1-24/+4
Instead of storing in the chip data whether the chip uses pinctrl and conditionally call pinctrl_{request,free}_gpio, just don't populate request/free in that case. This makes the implementations trivial and the same as the generic implementations, thus we can just use them. Signed-off-by: Jonas Gorski <jogo@openwrt.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-16gpio: replace trivial implementations of request/free with generic oneJonas Gorski6-72/+12
Replace all trivial request/free callbacks that do nothing but call into pinctrl code with the generic versions. Signed-off-by: Jonas Gorski <jogo@openwrt.org> Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: James Hogan <james.hogan@imgtec.com> Acked-by: Stefan Agner <stefan@agner.ch> Acked-by: Joachim Eastwood <manabian@gmail.com> Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-16gpiolib: provide generic request/free implementationsJonas Gorski1-0/+23
Provide generic request/free implementations that pinctrl aware gpio drivers can use instead of open coding if they use a 1:1 pin to gpio signal mapping. Signed-off-by: Jonas Gorski <jogo@openwrt.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-16gpio: omap: fix static checker warningGrygorii Strashko1-1/+1
This patch fixes below static checker warning by changing type of irq field in struct gpio_bank from u16 to int. drivers/gpio/gpio-omap.c:1191 omap_gpio_probe() warn: assigning (-6) to unsigned variable 'bank->irq' drivers/gpio/gpio-omap.c 1188 bank->irq = platform_get_irq(pdev, 0); 1189 if (bank->irq <= 0) { bank->irq is u16. 1190 if (!bank->irq) 1191 bank->irq = -ENXIO; Does not work. 1192 if (bank->irq != -EPROBE_DEFER) Does not work. 1193 dev_err(dev, 1194 "can't get irq resource ret=%d\n", bank->irq); 1195 return bank->irq; 1196 } Fixes: commit 89d18e3af8b9: "gpio: omap: switch to use platform_get_irq" Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-15gpio: pl061: assign the apropriate handler for irqsLinus Walleij1-5/+25
The PL061 can handle level IRQs and edge IRQs, however it is just utilizing handle_simple_irq() for all IRQs. Inspired by Stefan Agners patch to vf610, this assigns the right handler depending on what type is set up, and after this handle_bad_irq() is only used as default and if the type is not specified, as is done in the OMAP driver: defining the IRQ type is really not optional for this driver. The interrupt handler was just writing the interrupt clearing register for all lines that were high when entering the handling loop, this is wrong: that register is only supposed to be written (on a per-line basis) for edge IRQs, so this ACK was moved to the .irq_ack() callback as is proper. Tested with PL061 on the ARM RealView PB11MPCore and the MMC/SC card detect GPIO. Cc: Jonas Gorski <jogo@openwrt.org> Cc: Stefan Agner <stefan@agner.ch> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-15gpio: pl061: returning with lock held in pl061_irq_type()Dan Carpenter1-6/+7
We were returning with "chip->lock" held by mistake. It's safe to move the return to before we take the spinlock. Fixes: 1dbf7f299f90 ('gpio: pl061: detail IRQ trigger handling') Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-15gpio-mxc: stop including <asm-generic/bug>Christoph Hellwig1-1/+1
<asm-generic/bug> contains the default implementation of BUG() and friends, which architectures may decide to use. The proper way to get them is <linux/bug.h>, so use that. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-10-13irqdomain: Use irq_domain_get_of_node() instead of direct field accessMarc Zyngier1-1/+1
The struct irq_domain contains a "struct device_node *" field (of_node) that is almost the only link between the irqdomain and the device tree infrastructure. In order to prepare for the removal of that field, convert all users to use irq_domain_get_of_node() instead. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-05Revert "gpio-sysfs: Use gpio descriptor name instead of gpiochip names array"Linus Walleij1-1/+7
This reverts commit ddd5404007b8496f20ad2efe1147e102e6226634. We need to preserve only using this naming strategy for names coming from chip->names[], the descripor->name field is for the new interface.
2015-10-05gpio: pca953x: support ACPI devices found on Galileo Gen2Andy Shevchenko1-1/+20
This patch adds a support of the expandes found on Intel Galileo Gen2 board. The platform information comes from ACPI. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-05gpio: pca953x: store driver_data for future useAndy Shevchenko1-7/+10
Instead of using id->driver_data directly we copied it to the internal structure. This will help to adapt driver for ACPI use. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-05gpio: generic: use error pointersHeiner Kallweit1-35/+21
Use the ERRPTR standard way to return an error code in a pointer thus simplifiying the code. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-05gpio: generic: modernize remappingHeiner Kallweit1-11/+3
Replace devm_request_mem_region / devm_ioremap with devm_ioremap_resource. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-05gpio: generic: improve error handling in bgpio_mapHeiner Kallweit1-3/+5
If bgpio_map returns NULL then err should always be set. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: pca953x: Add TI TCA9539 supportThierry Reding1-0/+1
The TCA9539 is almost identical to the PCA9555 and software-compatible with this driver. It exposes 16 general purpose I/O pins in two 8-bit configurations. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: max730x: eliminate double freeJulia Lawall1-1/+0
The function __max730x_remove is called from the remove functions of drivers/gpio/gpio-max7300.c and drivers/gpio/gpio-max7301.c. In both cases, the probe function allocates ts using devm_kzalloc. Explicitly freeing such a value with kfree will cause a double free. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: omap: convert to use generic irq handlerGrygorii Strashko1-28/+27
This patch converts TI OMAP GPIO driver to use generic irq handler instead of chained IRQ handler. This way OMAP GPIO driver will be compatible with RT kernel where it will be forced thread IRQ handler while in non-RT kernel it still will be executed in HW IRQ context. As part of this change the IRQ wakeup configuration is applied to GPIO Bank IRQ as it now will be under control of IRQ PM Core during suspend. There are also additional benefits: - on-RT kernel there will be no complains any more about PM runtime usage in atomic context "BUG: sleeping function called from invalid context"; - GPIO bank IRQs will appear in /proc/interrupts and its usage statistic will be visible; - GPIO bank IRQs could be configured through IRQ proc_fs interface and, as result, could be a part of IRQ balancing process if needed; - GPIO bank IRQs will be under control of IRQ PM Core during suspend to RAM. Disadvantage: - additional runtime overhed as call chain till omap_gpio_irq_handler() will be longer now - necessity to use wa_lock in omap_gpio_irq_handler() to W/A warning in handle_irq_event_percpu() WARNING: CPU: 1 PID: 35 at kernel/irq/handle.c:149 handle_irq_event_percpu+0x51c/0x638() This patch doesn't fully follows recommendations provided by Sebastian Andrzej Siewior [1], because It's required to go through and check all GPIO IRQ pin states as fast as possible and pass control to handle_level_irq or handle_edge_irq. handle_level_irq or handle_edge_irq will perform actions specific for IRQ triggering type and wakeup corresponding registered threaded IRQ handler (at least it's expected to be threaded). IRQs can be lost if handle_nested_irq() will be used, because excecution time of some pin specific GPIO IRQ handler can be very significant and require accessing ext. devices (I2C). Idea of such kind reworking was also discussed in [2]. [1] http://www.spinics.net/lists/linux-omap/msg120665.html [2] http://www.spinics.net/lists/linux-omap/msg119516.html Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Austin Schuh <austin@peloton-tech.com> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: omap: move pm runtime in irq_chip.irq_bus_lock/sync_unlockGrygorii Strashko1-10/+15
The PM runtime API can't be used in atomic contex on -RT even if it's configured as irqsafe. As result, below error report can be seen when PM runtime API called from IRQ chip's callbacks irq_startup/irq_shutdown/irq_set_type, because they are protected by RAW spinlock: BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917 in_atomic(): 1, irqs_disabled(): 128, pid: 96, name: insmod 3 locks held by insmod/96: #0: (&dev->mutex){......}, at: [<c04752c8>] __driver_attach+0x54/0xa0 #1: (&dev->mutex){......}, at: [<c04752d4>] __driver_attach+0x60/0xa0 #2: (class){......}, at: [<c00a408c>] __irq_get_desc_lock+0x60/0xa4 irq event stamp: 1834 hardirqs last enabled at (1833): [<c06ab2a4>] _raw_spin_unlock_irqrestore+0x88/0x90 hardirqs last disabled at (1834): [<c06ab068>] _raw_spin_lock_irqsave+0x2c/0x64 softirqs last enabled at (0): [<c003d220>] copy_process.part.52+0x410/0x19d8 softirqs last disabled at (0): [< (null)>] (null) Preemption disabled at:[< (null)>] (null) CPU: 1 PID: 96 Comm: insmod Tainted: G W O 4.1.3-rt3-00618-g57e2387-dirty #184 Hardware name: Generic DRA74X (Flattened Device Tree) [<c00190f4>] (unwind_backtrace) from [<c0014734>] (show_stack+0x20/0x24) [<c0014734>] (show_stack) from [<c06a62ec>] (dump_stack+0x88/0xdc) [<c06a62ec>] (dump_stack) from [<c006ca44>] (___might_sleep+0x198/0x2a8) [<c006ca44>] (___might_sleep) from [<c06ab6d4>] (rt_spin_lock+0x30/0x70) [<c06ab6d4>] (rt_spin_lock) from [<c04815ac>] (__pm_runtime_resume+0x68/0xa4) [<c04815ac>] (__pm_runtime_resume) from [<c04123f4>] (omap_gpio_irq_type+0x188/0x1d8) [<c04123f4>] (omap_gpio_irq_type) from [<c00a64e4>] (__irq_set_trigger+0x68/0x130) [<c00a64e4>] (__irq_set_trigger) from [<c00a7bc4>] (irq_set_irq_type+0x44/0x6c) [<c00a7bc4>] (irq_set_irq_type) from [<c00abbf8>] (irq_create_of_mapping+0x120/0x174) [<c00abbf8>] (irq_create_of_mapping) from [<c0577b74>] (of_irq_get+0x48/0x58) [<c0577b74>] (of_irq_get) from [<c0540a14>] (i2c_device_probe+0x54/0x15c) [<c0540a14>] (i2c_device_probe) from [<c04750dc>] (driver_probe_device+0x184/0x2c8) [<c04750dc>] (driver_probe_device) from [<c0475310>] (__driver_attach+0x9c/0xa0) [<c0475310>] (__driver_attach) from [<c0473238>] (bus_for_each_dev+0x7c/0xb0) [<c0473238>] (bus_for_each_dev) from [<c0474af4>] (driver_attach+0x28/0x30) [<c0474af4>] (driver_attach) from [<c0474760>] (bus_add_driver+0x154/0x200) [<c0474760>] (bus_add_driver) from [<c0476348>] (driver_register+0x88/0x108) [<c0476348>] (driver_register) from [<c0541600>] (i2c_register_driver+0x3c/0x90) [<c0541600>] (i2c_register_driver) from [<bf003018>] (pcf857x_init+0x18/0x24 [gpio_pcf857x]) [<bf003018>] (pcf857x_init [gpio_pcf857x]) from [<c000998c>] (do_one_initcall+0x128/0x1e8) [<c000998c>] (do_one_initcall) from [<c06a4220>] (do_init_module+0x6c/0x1bc) [<c06a4220>] (do_init_module) from [<c00dd0c8>] (load_module+0x18e8/0x21c4) [<c00dd0c8>] (load_module) from [<c00ddaa0>] (SyS_init_module+0xfc/0x158) [<c00ddaa0>] (SyS_init_module) from [<c000ff40>] (ret_fast_syscall+0x0/0x54) The IRQ chip interface defines only two callbacks which are executed in non-atomic contex - irq_bus_lock/irq_bus_sync_unlock, so lets move PM runtime calls there. Tested-by: Tony Lindgren <tony@atomide.com> Tested-by: Austin Schuh <austin@peloton-tech.com> Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: add GPIO support for IT87xx, replacing gpio-it8761eDiego Elio Pettenò4-235/+422
This patch adds support for the GPIOs found on the ITE super-I/O chips IT87xx. Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu> Signed-off-by: Christophe Vu-Brugier <cvubrugier@fastmail.fm> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: gpiolib: don't compare an unsigned for >= 0Dirk Behme1-3/+1
The parameter offset is an unsigned, so it makes no sense to compare it for >= 0. Fix the compiler warning regarding this by removing this comparison. As the macro GPIO_OFFSET_VALID is only used at this single place, simplify the code by dropping the macro completely and dropping the invert, too. No functional change. Signed-off-by: Dirk Behme <dirk.behme@gmail.com> Acked-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: arizona: add support for WM8998 and WM1814Richard Fitzgerald1-0/+2
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: Fix error checking in the function device_pca957x_initNicholas Krause1-2/+6
This fixes error checking in the function device_pca957x_init to properly check and return error code values from the calls to the function pca953x_write_regs if they fail as to properly signal callers when a error occurs due a failure when writing registers for this gpio based device. Signed-off-by: Nicholas Krause <xerofoify@gmail.com> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: ath79: Convert to the state container design patternAlban Bedel1-59/+60
Turn the ath79 driver into a true driver supporting multiple instances. While at it also removed unneed includes and make use of the BIT() macro. Signed-off-by: Alban Bedel <albeu@free.fr> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: msm: Remove unused driverStephen Boyd3-462/+0
Remove this driver now that Bjorn has introduced a pinctrl driver for msm8660 and the dts files have been updated with the pinctrl compatibles. Cc: Andy Gross <agross@codeaurora.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: zynq: use container_of() to get state containerLinus Walleij1-10/+22
The state container of the Zynq GPIO driver is sometimes extracted from the gpio_chip exploiting the fact that offsetof() the struct gpio_chip inside the struct zynq_gpio is 0, so the container_of() is in practice a noop. However if a member is added to struct zynq_gpio in front of struct gpio_chip, things will break. Using proper container_of() avoids this problem. Semantically this is a noop, the compiler will optimize it away, but syntactically it makes me happier. Also replace some explicit container_of() calls with the helper function. Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Ezra Savard <ezra.savard@xilinx.com> Cc: Michal Simek <michal.simek@xilinx.com> Acked-by: Harini Katakam <harinik@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: vf610: use container_of() to get state containerLinus Walleij1-10/+19
The state container of the vf610 GPIO driver is sometimes extracted from the gpio_chip exploiting the fact that offsetof() the struct gpio_chip inside the struct vf610_gpio_port is 0, so the container_of() is in practice a noop. However if a member is added to struct vf610_gpio_port in front of struct gpio_chip, things will break. Using proper container_of() avoids this problem. Semantically this is a noop, the compiler will optimize it away, but syntactically it makes me happier. Also replace some explicit container_of() calls with the helper function. Acked-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: sx150x: use container_of() to get state containerLinus Walleij1-17/+14
The state container of the sx150x GPIO driver is sometimes extracted from the gpio_chip exploiting the fact that offsetof() the struct gpio_chip inside the struct sx150x_chip is 0, so the container_of() is in practice a noop. However if a member is added to struct sx150_chip in front of struct gpio_chip, things will break. Using proper container_of() avoids this problem. Semantically this is a noop, the compiler will optimize it away, but syntactically it makes me happier. Cc: Wei Chen <Wei.Chen@csr.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: altera: use container_of() to get state containerLinus Walleij1-5/+10
The state container of the Altera GPIO driver is extracted from the gpio_chip exploiting the fact that offsetof() the struct gpio_chip inside the struct of_mm_gpio_chip are both 0, so the container_of() is in practice a noop. However if a member is added to struct altera_gpio_chip in front of struct of_mm_gpio_chip, things will break. Using proper container_of() avoids this problem. Semantically this is a noop, the compiler will optimize it away, but syntactically it makes me happier. Cc: Tien Hock Loh <thloh@altera.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-10-02gpio: etraxfs: use container_of() to get state containerLinus Walleij1-6/+17
The state container of the etraxfs GPIO driver is extracted from the gpio_chip exploiting the fact that offsetof() the struct gpio_chip inside the struct bgpio_chip are both 0, so the container_of() is in practice a noop. However if a member is added to struct etraxfs_gpio_chip in front of struct bgpio_chip, things will break. Using proper container_of() avoids this problem. Semantically this is a noop, the compiler will optimize it away, but syntactically it makes me happier. Acked-by: Rabin Vincent <rabin@rab.in> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-17 00:18:29 +0000