driver-api/gpio/drivers-on-gpio.rst

2 Subsystem drivers using GPIO
5 Note that standard kernel drivers exist for common GPIO tasks and will provide
7 drivers can quite easily interconnect with other kernel subsystems using
10 - leds-gpio: drivers/leds/leds-gpio.c will handle LEDs connected to  GPIO
13 - ledtrig-gpio: drivers/leds/trigger/ledtrig-gpio.c will provide a LED trigger,
17 - gpio-keys: drivers/input/keyboard/gpio_keys.c is used when your GPIO line
20 - gpio-keys-polled: drivers/input/keyboard/gpio_keys_polled.c is used when your
24 - gpio_mouse: drivers/input/mouse/gpio_mouse.c is used to provide a mouse with
29 - gpio-beeper: drivers/input/misc/gpio-beeper.c is used to provide a beep from
33 - pwm-gpio: drivers/pwm/pwm-gpio.c is used to toggle a GPIO with a high
37 - extcon-gpio: drivers/extcon/extcon-gpio.c is used when you need to read an
41 - restart-gpio: drivers/power/reset/gpio-restart.c is used to restart/reboot
45 - poweroff-gpio: drivers/power/reset/gpio-poweroff.c is used to power the
50 - gpio-gate-clock: drivers/clk/clk-gpio.c is used to control a gated clock
53 - i2c-gpio: drivers/i2c/busses/i2c-gpio.c is used to drive an I2C bus
56   drivers for the I2C devices on the bus like any other I2C bus driver.
58 - spi_gpio: drivers/spi/spi-gpio.c is used to drive an SPI bus (variable number
61   and makes it possible to connect drivers for SPI devices on the bus like
65 - w1-gpio: drivers/w1/masters/w1-gpio.c is used to drive a one-wire bus using
69 - gpio-fan: drivers/hwmon/gpio-fan.c is used to control a fan for cooling the
74 - gpio-regulator: drivers/regulator/gpio-regulator.c is used to control a
78 - gpio-wdt: drivers/watchdog/gpio_wdt.c is used to provide a watchdog timer
83 - gpio-nand: drivers/mtd/nand/raw/gpio.c is used to connect a NAND flash chip
88 - ps2-gpio: drivers/input/serio/ps2-gpio.c is used to drive a PS/2 (IBM) serio
90   any other serio bus to the system and makes it possible to connect drivers
93 - cec-gpio: drivers/media/platform/cec-gpio/ is used to interact with a CEC
97 - gpio-charger: drivers/power/supply/gpio-charger.c is used if you need to do
104 - gpio-mux: drivers/mux/gpio.c is used for controlling a multiplexer using
110 Apart from this there are special GPIO drivers in subsystems like MMC/SD to
118 Needless to say, just using the appropriate kernel drivers will simplify and