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path: root/drivers/gpio/gpio-reg.c
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2019-11-07gpio: Use new GPIO_LINE_DIRECTIONMatti Vaittinen1-1/+2
It's hard for occasional GPIO code reader/writer to know if values 0/1 equal to IN or OUT. Use defined GPIO_LINE_DIRECTION_IN and GPIO_LINE_DIRECTION_OUT to help them out. NOTE - for gpio-amd-fch and gpio-bd9571mwv: This commit also changes the return value for direction get to equal 1 for direction INPUT. Prior this commit these drivers might have returned some other positive value but 1 for INPUT. Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> Acked-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com> Reviewed-by: Michal Simek <michal.simek@xilinx.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> Acked-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 233Thomas Gleixner1-4/+1
Based on 1 normalized pattern(s): this software is licensed under the terms of the gnu general public license version 2 as published by the free software foundation and may be copied distributed and modified under those terms extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 6 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.720704315@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-22gpio: gpio-reg: fix buildGrygorii Strashko1-2/+2
Revert changes introduced by commit f0fbe7bce733 ("gpio: Move irqdomain into struct gpio_irq_chip") as they are not aplicable to this driver. Reported-by: Russell King - ARM Linux <linux@armlinux.org.uk> Fixes: f0fbe7bce733 ("gpio: Move irqdomain into struct gpio_irq_chip") Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-11-08gpio: Move irqdomain into struct gpio_irq_chipThierry Reding1-2/+2
In order to consolidate the multiple ways to associate an IRQ chip with a GPIO chip, move more fields into the new struct gpio_irq_chip. Signed-off-by: Thierry Reding <treding@nvidia.com> Acked-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-03-24gpio: gpio-reg: add irq mapping for gpio-reg usersRussell King1-2/+23
Add support for mapping gpio-reg gpios to interrupts. This may be a non-linear mapping - some gpios in the register may not even have corresponding interrupts associated with them, so we need to pass an array. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-03-24gpio: add generic single-register fixed-direction GPIO driverRussell King1-0/+164
Add a simple, generic, single register fixed-direction GPIO driver. This is able to support a single register with a mixture of inputs and outputs. This is different from gpio-mmio and gpio-74xx-mmio: * gpio-mmio doesn't allow a fixed direction, it assumes there is always a direction register. * gpio-74xx-mmio only supports all-in or all-out setups * gpio-74xx-mmio is DT only, this needs to support legacy too * they don't double-read when getting the GPIO value, as required by some implementations that this driver supports * we need to always do 32-bit reads, which bgpio doesn't guarantee * the current output state may not be readable from the hardware register - reading may reflect input status but not output status. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>