From: Linus Walleij Date: Sat, 20 Jun 2020 20:12:48 +0000 (+0200) Subject: gpio: Add gpio-charger to the documentation X-Git-Tag: v5.15~3204^2~39 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8cbdc5045df071b146b76a718dd8669e89714057;p=platform%2Fkernel%2Flinux-starfive.git 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 Cc: Sebastian Reichel Link: https://lore.kernel.org/r/20200620201248.28843-1-linus.walleij@linaro.org --- diff --git a/Documentation/driver-api/gpio/drivers-on-gpio.rst b/Documentation/driver-api/gpio/drivers-on-gpio.rst index 820b403..41ec3cc 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