kernel/linux.git/drivers/gpio/Makefile, branch v6.12.80

gpiolib: acpi: Move quirks to a separate file

2026-01-08T09:15:00+00:00

[ Upstream commit 92dc572852ddcae687590cb159189004d58e382e ] The gpiolib-acpi.c is huge enough even without DMI quirks. Move them to a separate file for a better maintenance. No functional change intended. Reviewed-by: Hans de Goede Acked-by: Mika Westerberg Signed-off-by: Andy Shevchenko Stable-dep-of: 2d967310c49e ("gpiolib: acpi: Add quirk for Dell Precision 7780") Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

gpio: adp5585: Add Analog Devices ADP5585 support

2024-08-01T13:09:28+00:00

The ADP5585 is a 10/11 input/output port expander with a built in keypad matrix decoder, programmable logic, reset generator, and PWM generator. This driver supports the GPIO function using the platform device registered by the core MFD driver. The driver is derived from an initial implementation from NXP, available in commit 451f61b46b76 ("MLK-25917-2 gpio: adp5585-gpio: add adp5585-gpio support") in their BSP kernel tree. It has been extensively rewritten. Signed-off-by: Haibo Chen Reviewed-by: Linus Walleij Acked-by: Bartosz Golaszewski Co-developed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart Reviewed-by: Frank Li Link: https://lore.kernel.org/r/20240722121100.2855-4-laurent.pinchart@ideasonboard.com Signed-off-by: Lee Jones

gpio: virtuser: new virtual testing driver for the GPIO API

2024-07-09T07:39:54+00:00

The GPIO subsystem used to have a serious problem with undefined behavior and use-after-free bugs on hot-unplug of GPIO chips. This can be considered a corner-case by some as most GPIO controllers are enabled early in the boot process and live until the system goes down but most GPIO drivers do allow unbind over sysfs, many are loadable modules that can be (force) unloaded and there are also GPIO devices that can be dynamically detached, for instance CP2112 which is a USB GPIO expender. Bugs can be triggered both from user-space as well as by in-kernel users. We have the means of testing it from user-space via the character device but the issues manifest themselves differently in the kernel. This is a proposition of adding a new virtual driver - a configurable GPIO consumer that can be configured over configfs (similarly to gpio-sim) or described on the device-tree. This driver is aimed as a helper in spotting any regressions in hot-unplug handling in GPIOLIB. Link: https://lore.kernel.org/r/20240708142912.120570-1-brgl@bgdev.pl Signed-off-by: Bartosz Golaszewski

gpio: add sloppy logic analyzer using polling

2024-07-01T08:54:11+00:00

This is a sloppy logic analyzer using GPIOs. It comes with a script to isolate a CPU for polling. While this is definitely not a production level analyzer, it can be a helpful first view when remote debugging. Read the documentation for details. Signed-off-by: Wolfram Sang Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/20240620094159.6785-2-wsa+renesas@sang-engineering.com [Bartosz: moved the Kconfig entry into a different category] Signed-off-by: Bartosz Golaszewski

gpio: Add Intel Granite Rapids-D vGPIO driver

2024-04-25T11:57:28+00:00

This driver provides a basic GPIO driver for the Intel Granite Rapids-D virtual GPIOs. On SoCs with limited physical pins on the package, the physical pins controlled by this driver would be exposed on an external device such as a BMC or CPLD. The virtual GPIO registers are an interface to firmware, which communicates with the external device that implements the GPIO hardware functionality. Signed-off-by: Aapo Vienamo Reviewed-by: Mika Westerberg Reviewed-by: Linus Walleij Signed-off-by: Andy Shevchenko

Merge tag 'pinctrl-v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl

2024-03-14T17:22:26+00:00

Pull pin control updates from Linus Walleij: "No core changes this time around. New drivers: - New driver for Renesas R8A779H0 also known as R-Car V4M. - New driver for the Awinic AW9523/B I2C GPIO expander. I found this living out-of-tree in OpenWrt as an upstream attempt had stalled on the finishing line, so I picked it up and finished the job. Improvements: - The Nomadik pin control driver was for years re-used out of tree for the ST STA chips, and now the IP was re-used in a MIPS automotive SoC called MobilEyeq5, so it has been split in pin control and GPIO drivers so the latter can be reused by MobilEyeq5. (Along with a long list of cleanups) - A lot of overall cleanup and tidying up" * tag 'pinctrl-v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (87 commits) drivers/gpio/nomadik: move dummy nmk_gpio_dbg_show_one() to header gpio: nomadik: remove BUG_ON() in nmk_gpio_populate_chip() dt-bindings: pinctrl: qcom: update compatible name for match with driver pinctrl: aw9523: Make the driver tristate pinctrl: nomadik: fix dereference of error pointer gpio: nomadik: Back out some managed resources pinctrl: aw9523: Add proper terminator pinctrl: core: comment that pinctrl_add_gpio_range() is deprecated pinctrl: pinmux: Suppress error message for -EPROBE_DEFER pinctrl: Add driver for Awinic AW9523/B I2C GPIO Expander dt-bindings: pinctrl: Add bindings for Awinic AW9523/AW9523B gpio: nomadik: Finish conversion to use firmware node APIs gpio: nomadik: fix Kconfig dependencies inbetween pinctrl & GPIO pinctrl: da9062: Add OF table dt-bindings: pinctrl: at91: add sam9x7 pinctrl: ocelot: remove redundant assignment to variable ret gpio: nomadik: grab optional reset control and deassert it at probe gpio: nomadik: support mobileye,eyeq5-gpio gpio: nomadik: handle variadic GPIO count gpio: nomadik: support shared GPIO IRQs ...

gpio: nomadik: extract GPIO platform driver from drivers/pinctrl/nomadik/

2024-02-29T09:22:33+00:00

Previously, drivers/pinctrl/nomadik/pinctrl-nomadik.c registered two platform drivers: pinctrl & GPIO. Move the GPIO aspect to the drivers/gpio/ folder, as would be expected. Both drivers are intertwined for a reason; pinctrl requires access to GPIO registers for pinmuxing, pull-disable, disabling interrupts while setting the muxing and wakeup control. Information sharing is done through a shared array containing GPIO chips and a few helper functions. That shared array is not touched from gpio-nomadik when CONFIG_PINCTRL_NOMADIK is not defined. Make no change to the code that moved into gpio-nomadik; there should be no behavior change following. A few functions are shared and header comments are added. Checkpatch warnings are addressed. NUM_BANKS is renamed to NMK_MAX_BANKS. It is supported to compile gpio-nomadik without pinctrl-nomadik. The opposite is not true. Signed-off-by: Théo Lebrun Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-6-3ba757474006@bootlin.com Signed-off-by: Linus Walleij

gpio: Add ChromeOS EC GPIO driver

2024-02-26T13:37:50+00:00

The ChromeOS embedded controller (EC) supports setting the state of GPIOs when the system is unlocked, and getting the state of GPIOs in all cases. The GPIOs are on the EC itself, so the EC acts similar to a GPIO expander. Add a driver to get and set the GPIOs on the EC through the host command interface. Signed-off-by: Stephen Boyd Reviewed-by: Linus Walleij Signed-off-by: Bartosz Golaszewski

gpio: nuvoton: Add Nuvoton NPCM sgpio driver

2024-01-03T10:25:41+00:00

Add Nuvoton BMC NPCM7xx/NPCM8xx sgpio driver support. Nuvoton NPCM SGPIO module is combine serial to parallel IC (HC595) and parallel to serial IC (HC165), and use APB3 clock to control it. This interface has 4 pins (D_out , D_in, S_CLK, LDSH). BMC can use this driver to increase 64 GPI pins and 64 GPO pins to use. Signed-off-by: Jim Liu Signed-off-by: Bartosz Golaszewski

gpio: rtd: Add support for Realtek DHC(Digital Home Center) RTD SoCs

2024-01-03T09:46:21+00:00

This driver enables configuration of GPIO direction, GPIO values, GPIO debounce settings and handles GPIO interrupts. Signed-off-by: Tzuyi Chang Reviewed-by: Linus Walleij Signed-off-by: Bartosz Golaszewski