Commit b55ac4ea authored by Lee Jones's avatar Lee Jones Committed by Linus Walleij

drivers/gpio: gpio-nomadik: Provide documentation for Device Tree bindings

Add required documentation for specific gpio-nomadik DT bindings.
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij's avatarLinus Walleij <linus.walleij@linaro.org>
parent c0b133bd
Nomadik GPIO controller
Required properties:
- compatible : Should be "st,nomadik-gpio".
- reg : Physical base address and length of the controller's registers.
- interrupts : The interrupt outputs from the controller.
- #gpio-cells : Should be two:
The first cell is the pin number.
The second cell is used to specify optional parameters:
- bits[3:0] trigger type and level flags:
1 = low-to-high edge triggered.
2 = high-to-low edge triggered.
4 = active high level-sensitive.
8 = active low level-sensitive.
- gpio-controller : Marks the device node as a GPIO controller.
- gpio-bank : Specifies which bank a controller owns.
- st,supports-sleepmode : Specifies whether controller can sleep or not
Example:
gpio1: gpio@8012e080 {
compatible = "st,nomadik-gpio";
reg = <0x8012e080 0x80>;
interrupts = <0 120 0x4>;
#gpio-cells = <2>;
gpio-controller;
supports-sleepmode;
gpio-bank = <1>;
};
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