Lines Matching +full:spi +full:- +full:gpio

2 Subsystem drivers using GPIO
5 Note that standard kernel drivers exist for common GPIO tasks and will provide
6 the right in-kernel and userspace APIs/ABIs for the job, and that these
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,
14 i.e. a LED will turn on/off in response to a GPIO line going high or low
15 (and that LED may in turn use the leds-gpio as per above).
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
21 GPIO line cannot generate interrupts, so it needs to be periodically polled
24 - gpio_mouse: drivers/input/mouse/gpio_mouse.c is used to provide a mouse with
26 mouse cable and connect the wires to GPIO lines or solder a mouse connector
29 - gpio-beeper: drivers/input/misc/gpio-beeper.c is used to provide a beep from
30 an external speaker connected to a GPIO line.
32 - extcon-gpio: drivers/extcon/extcon-gpio.c is used when you need to read an
34 HDMI connector. It will provide a better userspace sysfs interface than GPIO.
36 - restart-gpio: drivers/power/reset/gpio-restart.c is used to restart/reboot
37 the system by pulling a GPIO line and will register a restart handler so
40 - poweroff-gpio: drivers/power/reset/gpio-poweroff.c is used to power the
41 system down by pulling a GPIO line and will register a pm_power_off()
45 - gpio-gate-clock: drivers/clk/clk-gpio.c is used to control a gated clock
46 (off/on) that uses a GPIO, and integrated with the clock subsystem.
48 - i2c-gpio: drivers/i2c/busses/i2c-gpio.c is used to drive an I2C bus
49 (two wires, SDA and SCL lines) by hammering (bitbang) two GPIO lines. It will
53 - spi_gpio: drivers/spi/spi-gpio.c is used to drive an SPI bus (variable number
55 GPIO hammering (bitbang). It will appear as any other SPI bus on the system
56 and makes it possible to connect drivers for SPI devices on the bus like
57 any other SPI bus driver. For example any MMC/SD card can then be connected
58 to this SPI by using the mmc_spi host from the MMC/SD card subsystem.
60 - w1-gpio: drivers/w1/masters/w1-gpio.c is used to drive a one-wire bus using
61 a GPIO line, integrating with the W1 subsystem and handling devices on
64 - gpio-fan: drivers/hwmon/gpio-fan.c is used to control a fan for cooling the
65 system, connected to a GPIO line (and optionally a GPIO alarm line),
66 presenting all the right in-kernel and sysfs interfaces to make your system
69 - gpio-regulator: drivers/regulator/gpio-regulator.c is used to control a
70 regulator providing a certain voltage by pulling a GPIO line, integrating
73 - gpio-wdt: drivers/watchdog/gpio_wdt.c is used to provide a watchdog timer
74 that will periodically "ping" a hardware connected to a GPIO line by toggling
75 it from 1-to-0-to-1. If that hardware does not receive its "ping"
78 - gpio-nand: drivers/mtd/nand/raw/gpio.c is used to connect a NAND flash chip
79 to a set of simple GPIO lines: RDY, NCE, ALE, CLE, NWP. It interacts with the
83 - ps2-gpio: drivers/input/serio/ps2-gpio.c is used to drive a PS/2 (IBM) serio
84 bus, data and clock line, by bit banging two GPIO lines. It will appear as
88 - cec-gpio: drivers/media/platform/cec-gpio/ is used to interact with a CEC
89 Consumer Electronics Control bus using only GPIO. It is used to communicate
92 - gpio-charger: drivers/power/supply/gpio-charger.c is used if you need to do
95 nothing but GPIO lines, this driver provides that and also a clearly defined
99 - gpio-mux: drivers/mux/gpio.c is used for controlling a multiplexer using
100 n GPIO lines such that you can mux in 2^n different devices by activating
101 different GPIO lines. Often the GPIOs are on a SoC and the devices are
102 some SoC-external entities, such as different components on a PCB that
105 Apart from this there are special GPIO drivers in subsystems like MMC/SD to
106 read card detect and write protect GPIO lines, and in the TTY serial subsystem
107 to emulate MCTRL (modem control) signals CTS/RTS by using two GPIO lines. The
108 MTD NOR flash has add-ons for extra GPIO lines too, though the address bus is
114 speed up your embedded hacking in particular by providing ready-made components.