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2021-05-05gpio: mxs: remove useless functionJiapeng Chong1-5/+0
Fix the following gcc warning: drivers/gpio/gpio-mxs.c:63:19: warning: kernel/sys_ni.cunused function 'is_imx28_gpio'. Reported-by: Abaci Robot <abaci@linux.alibaba.com> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-05-05dt-bindings: gpio: fairchild,74hc595: Convert to json-schemaGeert Uytterhoeven2-27/+77
Convert the Generic 8-bit shift register Device Tree binding documentation to json-schema. Rename from gpio-74x164 to fairchild,74hc595, as the former refers to the Linux driver, and not to a hardware name. Add the missing hog description. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-05-05gpio: it87: remove unused codeJiapeng Chong1-8/+0
Fix the following clang warning: drivers/gpio/gpio-it87.c:128:20: warning: unused function 'superio_outw' [-Wunused-function]. Reported-by: Abaci Robot <abaci@linux.alibaba.com> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Acked-by: Simon Guinot <simon.guinot@sequanux.org> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-05-05gpio: 104-dio-48e: Fix coding style issuesBarney Goette1-25/+25
Fixed multiple bare uses of 'unsigned' without 'int'. Fixed space around "*" operator. Fixed function parameter alignment to opening parenthesis. Reported by checkpatch. Signed-off-by: Barney Goette <barneygoette@gmail.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-05-05gpio: mpc8xxx: Add ACPI supportRan Wang1-14/+33
Current implementation only supports DT, now add ACPI support. Signed-off-by: Ran Wang <ran.wang_1@nxp.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-05-05gpio: ich: Switch to be dependent on LPC_ICHAndy Shevchenko2-5/+2
Driver is neither dependent to PCI nor using MFD_CORE. Replace those dependency and selection by dependency on LPC_ICH. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-05-05gpio: sch: Drop MFD_CORE selectionAndy Shevchenko1-1/+0
Since we are depended on LPC_SCH, which selects MFD_CORE, we don't need to do it ourselves. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-05-05gpio: sch: depends on LPC_SCHRandy Dunlap1-1/+1
Since LPC_SCH provides GPIO functionality, GPIO_SCH should depend on LPC_SCH to prevent kconfig warning and build errors: WARNING: unmet direct dependencies detected for LPC_SCH Depends on [n]: HAS_IOMEM [=y] && PCI [=n] Selected by [y]: - GPIO_SCH [=y] && GPIOLIB [=y] && X86 [=y] && (X86 [=y] || COMPILE_TEST [=n]) && ACPI [=y] and ../drivers/mfd/lpc_sch.c:204:1: warning: data definition has no type or storage class module_pci_driver(lpc_sch_driver); ^~~~~~~~~~~~~~~~~ ../drivers/mfd/lpc_sch.c:204:1: error: type defaults to ‘int’ in declaration of ‘module_pci_driver’ [-Werror=implicit-int] ../drivers/mfd/lpc_sch.c:204:1: warning: parameter names (without types) in function declaration ../drivers/mfd/lpc_sch.c:197:26: warning: ‘lpc_sch_driver’ defined but not used [-Wunused-variable] static struct pci_driver lpc_sch_driver = { ^~~~~~~~~~~~~~ Fixes: 6c46215d6b62 ("gpio: sch: Hook into ACPI GPE handler to catch GPIO edge events") Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: linux-gpio@vger.kernel.org Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Cc: Denis Turischev <denis@compulab.co.il> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-05-05gpiolib: acpi: Add quirk to ignore EC wakeups on Dell Venue 10 Pro 5055Hans de Goede1-0/+14
Like some other Bay and Cherry Trail SoC based devices the Dell Venue 10 Pro 5055 has an embedded-controller which uses ACPI GPIO events to report events instead of using the standard ACPI EC interface for this. The EC interrupt is only used to report battery-level changes and it keeps doing this while the system is suspended, causing the system to not stay suspended. Add an ignore-wake quirk for the GPIO pin used by the EC to fix the spurious wakeups from suspend. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-05-05gpio: sch: Hook into ACPI GPE handler to catch GPIO edge eventsAndy Shevchenko2-1/+83
Neither the ACPI description on Intel Minnowboard (v1) platform provides the required information to establish a generic handling nor the hardware capable of doing it. According to the data sheet the hardware can generate SCI events. Therefore, we need to hook from the driver into GPE handler of the ACPI subsystem in order to catch and report GPIO-related events. Validated on the Inlel Minnowboard (v1) platform and Intel Galileo Gen 2. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2021-05-05gpio: sch: Add edge event supportJan Kiszka2-8/+109
Add the required infrastructure to enable and report edge events of the pins to the GPIO core. The actual hook-up of the event interrupt will happen separately. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Co-developed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
2021-05-05gpio: aggregator: Replace custom get_arg() with a generic next_arg()Andy Shevchenko1-34/+5
cmdline library provides next_arg() helper to traverse over parameters and their values given in command line. Replace custom approach in the driver by it. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
2021-05-05lib/cmdline: Export next_arg() for being used in modulesAndy Shevchenko1-0/+1
At least one module will benefit from using next_arg() helper. Let's export it for that module and others if they consider it helpful. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
2021-05-05gpio: omap: Use device_get_match_data() helperTian Tao1-3/+2
Use the device_get_match_data() helper instead of open coding. Signed-off-by: Tian Tao <tiantao6@hisilicon.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-05-05gpio: Add Realtek Otto GPIO supportSander Vanheule3-0/+339
Realtek MIPS SoCs (platform name Otto) have GPIO controllers with up to 64 GPIOs, divided over two banks. Each bank has a set of registers for 32 GPIOs, with support for edge-triggered interrupts. Each GPIO bank consists of four 8-bit GPIO ports (ABCD and EFGH). Most registers pack one bit per GPIO, except for the IMR register, which packs two bits per GPIO (AB-CD). Although the byte order is currently assumed to have port A..D at offset 0x0..0x3, this has been observed to be reversed on other, Lexra-based, SoCs (e.g. RTL8196E/97D/97F). Interrupt support is disabled for the fallback devicetree-compatible 'realtek,otto-gpio'. This allows for quick support of GPIO banks in which the byte order would be unknown. In this case, the port ordering in the IMR registers may not match the reversed order in the other registers (DCBA, and BA-DC or DC-BA). Signed-off-by: Sander Vanheule <sander@svanheule.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>