| Message ID | 20180928131531.4598-2-Eugeniy.Paltsev@synopsys.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v4,1/2] GPIO: add single-register GPIO via CREG driver | expand |
On Fri, Sep 28, 2018 at 3:15 PM Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> wrote: > This patch adds documentation of device tree bindings for the Synopsys > GPIO via CREG driver. > > Reviewed-by: Rob Herring <robh@kernel.org> > Reviewed-by: Linus Walleij <linus.walleij@linaro.org> > Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> > --- > Changes v3->v4: > * Fix #gpio-cells description as driver is used generic GPIO binding. Patch applied. Yours, 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 000000000000..1b30812b015b --- /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>; +};