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* gpio: pl061: constify amba_idArvind Yadav2017-08-311-1/+1
| | | | | | | | amba_id are not supposed to change at runtime. All functions working with const amba_id. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* Revert "gpiolib: request the gpio before querying its direction"Linus Walleij2017-08-311-11/+0
| | | | | | | | | | | This reverts commit 108d23e322a247d9f89ba2e2742520ead0944cc9. It turns out this causes a regression on the OMAP, Marvell and Renesas. Reported-by: Tony Lindgren <tony@atomide.com> Reported-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Reported-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: twl6040: remove unneeded forward declarationMasahiro Yamada2017-08-231-2/+0
| | | | | | | There is no reference to twl6040gpo_chip before its definition. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: zevio: make gpio_chip constBhumika Goyal2017-08-231-1/+1
| | | | | | | | Make this const as it is only used as a copy operation. Done using Coccinelle. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: add gpio_add_lookup_tables() to add several tables at onceDmitry Torokhov2017-08-232-0/+20
| | | | | | | | | | | When converting legacy board to use gpiod API() there might be several lookup tables in board file, let's provide a way to register them all at once. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: rcar: Add r8a7745 (RZ/G1E) supportBiju Das2017-08-221-0/+1
| | | | | | | | | | | Renesas RZ/G1E (R8A7745) SoC GPIO blocks are identical to the R-Car Gen2 family. Add support for its GPIO controllers. Signed-off-by: Biju Das <biju.das@bp.renesas.com> Acked-by: Simon Horman <horms+renesas@verge.net.au> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: brcmstb: check return value of gpiochip_irqchip_add()Masahiro Yamada2017-08-221-4/+5
| | | | | | | | | Because gpiochip_irqchip_add() may fail, its return value should be checked. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Gregory Fong <gregory.0xf0@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* MAINTAINERS: Add entry for THUNDERX GPIO Driver.David Daney2017-08-221-0/+5
| | | | | Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: Add gpio driver support for ThunderX and OCTEON-TXDavid Daney2017-08-223-0/+649
| | | | | | | | Cavium ThunderX and OCTEON-TX are arm64 based SoCs. Add driver for the on-chip GPIO pins. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* gpio: mockup: use irq_simBartosz Golaszewski2017-08-212-71/+8
| | | | | | | | | Shrink the driver by removing the code dealing with dummy interrupts and replacing it with calls to the irq_sim API. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* Merge branch 'irq/for-gpio' of ↵Linus Walleij2017-08-219-30/+533
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into devel
| * irqdomain: Add irq_domain_{push,pop}_irq() functionsDavid Daney2017-08-182-0/+172
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For an already existing irqdomain hierarchy, as might be obtained via a call to pci_enable_msix_range(), a PCI driver wishing to add an additional irqdomain to the hierarchy needs to be able to insert the irqdomain to that already initialized hierarchy. Calling irq_domain_create_hierarchy() allows the new irqdomain to be created, but no existing code allows for initializing the associated irq_data. Add a couple of helper functions (irq_domain_push_irq() and irq_domain_pop_irq()) to initialize the irq_data for the new irqdomain added to an existing hierarchy. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-gpio@vger.kernel.org Link: http://lkml.kernel.org/r/1503017616-3252-6-git-send-email-david.daney@cavium.com
| * irqdomain: Check for NULL function pointer in irq_domain_free_irqs_hierarchy()David Daney2017-08-181-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A follow-on patch will call irq_domain_free_irqs_hierarchy() when the free() function pointer may be NULL. Add a NULL pointer check to handle this new use case. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-gpio@vger.kernel.org Link: http://lkml.kernel.org/r/1503017616-3252-5-git-send-email-david.daney@cavium.com
| * irqdomain: Factor out code to add and remove items to and from the revmapDavid Daney2017-08-181-29/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code to add and remove items to and from the revmap occurs several times. In preparation for the follow on patches that add more uses of this code, factor this out in to separate static functions. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-gpio@vger.kernel.org Link: http://lkml.kernel.org/r/1503017616-3252-4-git-send-email-david.daney@cavium.com
| * genirq: Add handle_fasteoi_{level,edge}_irq flow handlersDavid Daney2017-08-183-0/+112
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Follow-on patch for gpio-thunderx uses a irqdomain hierarchy which requires slightly different flow handlers, add them to chip.c which contains most of the other flow handlers. Make these conditionally compiled based on CONFIG_IRQ_FASTEOI_HIERARCHY_HANDLERS. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-gpio@vger.kernel.org Link: http://lkml.kernel.org/r/1503017616-3252-3-git-send-email-david.daney@cavium.com
| * genirq: Export more irq_chip_*_parent() functionsDavid Daney2017-08-181-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many of the family of functions including irq_chip_mask_parent(), irq_chip_unmask_parent() are exported, but not all. Add EXPORT_SYMBOL_GPL to irq_chip_enable_parent, irq_chip_disable_parent and irq_chip_set_affinity_parent, so they likewise are usable from modules. Signed-off-by: David Daney <david.daney@cavium.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-gpio@vger.kernel.org Link: http://lkml.kernel.org/r/1503017616-3252-2-git-send-email-david.daney@cavium.com
| * genirq/irq_sim: Add a devres variant of irq_sim_init()Bartosz Golaszewski2017-08-163-0/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a resource managed version of irq_sim_init(). This can be conveniently used in device drivers. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-doc@vger.kernel.org Cc: linux-gpio@vger.kernel.org Cc: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> Cc: Jonathan Cameron <jic23@kernel.org> Link: http://lkml.kernel.org/r/20170814145318.6495-3-brgl@bgdev.pl Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
| * genirq/irq_sim: Add a simple interrupt simulator frameworkBartosz Golaszewski2017-08-164-0/+168
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement a simple, irq_work-based framework for simulating interrupts. Currently the API exposes routines for initializing and deinitializing the simulator object, enqueueing the interrupts and retrieving the allocated interrupt numbers based on the offset of the dummy interrupt in the simulator struct. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-doc@vger.kernel.org Cc: linux-gpio@vger.kernel.org Cc: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org> Cc: Jonathan Cameron <jic23@kernel.org> Link: http://lkml.kernel.org/r/20170814145318.6495-2-brgl@bgdev.pl Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | gpio: mxs: use devres for irq generic chipBartosz Golaszewski2017-08-211-5/+9
| | | | | | | | | | | | | | | | Use resource managed variants of irq_alloc_generic_chip() and irq_setup_generic_chip(). Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: mxc: use devres for irq generic chipBartosz Golaszewski2017-08-211-5/+10
| | | | | | | | | | | | | | | | Use resource managed variants of irq_alloc_generic_chip() and irq_setup_generic_chip(). Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: pch: use devres for irq generic chipBartosz Golaszewski2017-08-211-5/+7
| | | | | | | | | | | | | | | | Use resource managed variants of irq_alloc_generic_chip() and irq_setup_generic_chip(). Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: ml-ioh: use devres for irq generic chipBartosz Golaszewski2017-08-211-5/+7
| | | | | | | | | | | | | | | | Use resource managed variants of irq_alloc_generic_chip() and irq_setup_generic_chip(). Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: sta2x11: use devres for irq generic chipBartosz Golaszewski2017-08-211-4/+9
| | | | | | | | | | | | | | | | Use resource managed variants of irq_alloc_generic_chip() and irq_setup_generic_chip(). Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: sta2x11: disallow unbinding the driverBartosz Golaszewski2017-08-211-0/+1
| | | | | | | | | | | | | | This driver is non-modular so explicitly disallow a driver unbind. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: mxs: disallow unbinding the driverBartosz Golaszewski2017-08-211-0/+1
| | | | | | | | | | | | | | This driver is non-modular so explicitly disallow a driver unbind. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: mxc: disallow unbinding the driverBartosz Golaszewski2017-08-211-0/+1
| | | | | | | | | | | | | | This driver is non-modular so explicitly disallow a driver unbind. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: aspeed: Remove reference to clock name in debounce warning messageAndrew Jeffery2017-08-151-1/+1
| | | | | | | | | | | | | | | | | | HPLL is in fact not the clock we need. Remove the description of which clock we failed to find a phandle to in order to avoid any further error. Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | dt-bindings: gpio: aspeed: Remove reference to clock nameAndrew Jeffery2017-08-151-1/+1
| | | | | | | | | | | | | | | | | | | | | | HPLL is in fact not the clock we need. Remove prescription of which clock to avoid further error. Please refer to your datasheet and double check like I should have. Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Acked-by: Rob Herring <robh@kernel.org> Acked-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: 74x164: Introduce 'enable-gpios' propertyFabio Estevam2017-08-142-0/+13
| | | | | | | | | | | | | | | | | | | | | | 74HC595 has an /OE (output enable) pin that can be controlled by a GPIO. Introduce an optional property called 'enable-gpios' that allows controlling the /OE pin. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: max77620: Make regmap_irq_chip constBhumika Goyal2017-08-141-1/+1
| | | | | | | | | | | | | | | | | | Make the structure const as it is only passed to the function devm_regmap_add_irq_chip having the corresponding argument as const. Done using Coccinelle. Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: zynq: Fix driver function parameters alignmentMichal Simek2017-08-141-8/+9
| | | | | | | | | | | | | | Fix function parameters alignment reported by checkpatch. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: zynq: Fix warnings in the driverNava kishore Manne2017-08-141-6/+6
| | | | | | | | | | | | | | | | | | | | | | This patch fixes the below warning -->Block comments should align the * on each line. -->suspect code indent for conditional statements. -->Prefer 'unsigned int' to bare use of 'unsigned' Signed-off-by: Nava kishore Manne <navam@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: zynq: Fix empty lines in driverMichal Simek2017-08-141-1/+2
| | | | | | | | | | | | | | Remove one additional line and add two new. All are reported by checkpatch. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: zynq: Fix kernel doc warningsNava kishore Manne2017-08-141-2/+3
| | | | | | | | | | | | | | | | This patch fixes the kernel doc warnings in the driver. Signed-off-by: Nava kishore Manne <navam@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: zynq: Provided workaround for GPIOSwapna Manupati2017-08-141-4/+37
| | | | | | | | | | | | | | | | | | | | | | This patch provides workaround in the gpio driver for Zynq and ZynqMP Platforms by reading pin value of EMIO banks through DATA register as it was unable to read the value of it from DATA_RO register. Signed-off-by: Swapna Manupati <swapnam@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: zynq: Add support for suspend resumeShubhrajyoti Datta2017-08-141-3/+79
| | | | | | | | | | | | | | | | | | Add support for suspend resume. Now that we can lose context across a suspend/ resume cycle. Add support for the context restore. Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: Add support for TPS68470 GPIOsRajmohan Mani2017-08-143-0/+192
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support for TPS68470 GPIOs. There are 7 GPIOs and a few sensor related GPIOs. These GPIOs can be requested and configured as appropriate. The GPIOs are also provided with descriptive names. However, the typical use case is that the OS GPIO driver will interact with TPS68470 GPIO driver to configure these GPIOs, as requested by the platform firmware. Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: davinci: Handle the return value of davinci_gpio_irq_setup functionKeerthy2017-08-141-1/+4
| | | | | | | | | | | | | | | | Currently davinci_gpio_irq_setup return value is ignored. Handle the return value appropriately. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | dt-bindings: gpio: davinci: Add keystone-k2g compatibleKeerthy2017-08-141-2/+89
| | | | | | | | | | | | | | | | | | | | The patch adds keystone-k2g compatible, specific properties and an example. The patch also adds the details of supported SoCs for each compatible. Signed-off-by: Keerthy <j-keerthy@ti.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: vf610: add imx7ulp supportDong Aisheng2017-08-141-3/+44
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Rapid General-Purpose Input and Output with 2 Ports (RGPIO2P) on MX7ULP is similar to GPIO on Vibrid. But unlike Vibrid, the RGPIO2P has an extra Port Data Direction Register (PDDR) used to configure the individual port pins for input or output. We introduce a bool have_paddr with fsl_gpio_soc_data data to distinguish this differences. And we support getting the output status by checking the GPIO direction in PDDR. Cc: Alexandre Courbot <gnurou@gmail.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Stefan Agner <stefan@agner.ch> Cc: Fugang Duan <fugang.duan@nxp.com> Cc: Peter Chen <peter.chen@nxp.com> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: msic: fix error return code in platform_msic_gpio_probe()Gustavo A. R. Silva2017-08-141-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | platform_get_irq() returns an error code, but the gpio-msic driver ignores it and always returns -EINVAL. This is not correct, and prevents -EPROBE_DEFER from being propagated properly. Notice that platform_get_irq() no longer returns 0 on error: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af Print and propagate the return value of platform_get_irq on failure. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: omap : Add missing clk_unprepare().Arvind Yadav2017-08-141-0/+2
| | | | | | | | | | | | | | | | omap_gpio_probe() can fail here and we must disable clock. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: mb86s7x: Handle return value of clk_prepare_enable.Arvind Yadav2017-08-141-1/+3
| | | | | | | | | | | | | | clk_prepare_enable() can fail here and we must check its return value. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: it87: add support for IT8772F Super I/O.Diego Elio Pettenò2017-08-141-0/+3
| | | | | | | | | | | | | | | | From the datasheet, the GPIO interface is identical to IT8728 (same description), so just add it to the same case as the other chip. Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: tegra: Use unsigned int where possibleThierry Reding2017-08-141-32/+24
| | | | | | | | | | | | | | | | | | In most of the cases, integers in this file can't be negative, so the type can be more restricted for clarity. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: tegra: Fix checkpatch warningsThierry Reding2017-08-141-12/+20
| | | | | | | | | | | | | | | | | | | | Fix a couple of checkpatch warnings, such as complaints about bare unsigned being used (instead of unsigned int) and missing blank lines after declarations. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: tegra: Prefer kcalloc() over kzalloc() with multipliesThierry Reding2017-08-141-2/+2
| | | | | | | | | | | | | | | | | | Rather than manually compute the size of an array, pass the number and element size to kcalloc(). Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: tegra: Remove unnecessary checkThierry Reding2017-08-141-9/+2
| | | | | | | | | | | | | | | | | | of_device_get_match_data() can never return NULL, therefore the check for NULL values is unnecessary. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | gpio: Use unsigned int for of_gpio_n_cellsThierry Reding2017-08-141-1/+1
| | | | | | | | | | | | | | | | The cell count for GPIO specifiers can never be negative, so make the field unsigned. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
* | docs: driver-api: Add GPIO sectionThierry Reding2017-08-142-0/+46
| | | | | | | | | | | | | | | | | | | | This adds a section about the various parts of the GPIO subsystem to the driver API documentation. Note that this isn't exhaustive documentation, but rather focusses on pulling in the kerneldoc from various sources, in order to improve coverage of kerneldoc processing. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-24 12:29:46 +0100