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authorEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>2018-09-28 16:15:31 +0300
committerLinus Walleij <linus.walleij@linaro.org>2018-10-10 10:19:14 +0300
commit29f55cc664f48cfeee661b2dbea39cd72a311e7e (patch)
tree6074e0408fd7db7bd235e10aeddfc0bfc5bc8667 /Documentation
parent3ea47b447da0b8e93735612f2b0d128dba4d7524 (diff)
downloadlinux-29f55cc664f48cfeee661b2dbea39cd72a311e7e.tar.xz
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 <robh@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/gpio/snps,creg-gpio.txt21
1 files changed, 21 insertions, 0 deletions
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>;
+};