diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2020-06-20 22:12:48 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2020-07-07 13:52:33 +0200 |
| commit | 8cbdc5045df071b146b76a718dd8669e89714057 (patch) | |
| tree | 0037a0b845493e9922a74a428e0a56252c036d29 /Documentation/driver-api/gpio/drivers-on-gpio.rst | |
| parent | b239e4454e59bc85d466eb5630da46f6a876df77 (diff) | |
gpio: Add gpio-charger to the documentation
The GPIO-based charger is another of the helpful devices built
on top of GPIO.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20200620201248.28843-1-linus.walleij@linaro.org
Diffstat (limited to 'Documentation/driver-api/gpio/drivers-on-gpio.rst')
| -rw-r--r-- | Documentation/driver-api/gpio/drivers-on-gpio.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/driver-api/gpio/drivers-on-gpio.rst b/Documentation/driver-api/gpio/drivers-on-gpio.rst index 820b403d50f6..41ec3cc72d32 100644 --- a/Documentation/driver-api/gpio/drivers-on-gpio.rst +++ b/Documentation/driver-api/gpio/drivers-on-gpio.rst @@ -89,6 +89,13 @@ hardware descriptions such as device tree or ACPI: Consumer Electronics Control bus using only GPIO. It is used to communicate with devices on the HDMI bus. +- gpio-charger: drivers/power/supply/gpio-charger.c is used if you need to do + battery charging and all you have to go by to check the presence of the + AC charger or more complex tasks such as indicating charging status using + nothing but GPIO lines, this driver provides that and also a clearly defined + way to pass the charging parameters from hardware descriptions such as the + device tree. + Apart from this there are special GPIO drivers in subsystems like MMC/SD to read card detect and write protect GPIO lines, and in the TTY serial subsystem to emulate MCTRL (modem control) signals CTS/RTS by using two GPIO lines. The |