From: Eugeniy Paltsev Date: Fri, 28 Sep 2018 13:15:31 +0000 (+0300) Subject: dt-bindings: Document the Synopsys GPIO via CREG bindings X-Git-Tag: v5.15~7808^2~13 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=29f55cc664f48cfeee661b2dbea39cd72a311e7e;p=platform%2Fkernel%2Flinux-starfive.git dt-bindings: Document the Synopsys GPIO via CREG bindings This patch adds documentation of device tree bindings for the Synopsys GPIO via CREG driver. Reviewed-by: Rob Herring Reviewed-by: Linus Walleij Signed-off-by: Eugeniy Paltsev Signed-off-by: Linus Walleij --- diff --git a/Documentation/devicetree/bindings/gpio/snps,creg-gpio.txt b/Documentation/devicetree/bindings/gpio/snps,creg-gpio.txt new file mode 100644 index 0000000..1b30812 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/snps,creg-gpio.txt @@ -0,0 +1,21 @@ +Synopsys GPIO via CREG (Control REGisters) driver + +Required properties: +- compatible : "snps,creg-gpio-hsdk" or "snps,creg-gpio-axs10x". +- reg : Exactly one register range with length 0x4. +- #gpio-cells : Since the generic GPIO binding is used, the + amount of cells must be specified as 2. The first cell is the + pin number, the second cell is used to specify optional parameters: + See "gpio-specifier" in .../devicetree/bindings/gpio/gpio.txt. +- gpio-controller : Marks the device node as a GPIO controller. +- ngpios: Number of GPIO pins. + +Example: + +gpio: gpio@f00014b0 { + compatible = "snps,creg-gpio-hsdk"; + reg = <0xf00014b0 0x4>; + gpio-controller; + #gpio-cells = <2>; + ngpios = <2>; +};