[PATCH v1 2/3] Documentation: gpio: Add APM X-Gene standby GPIO controller DTS binding

Y Vo
2014-10-08T14:52:27Z

Documentation for APM X-Gene standby GPIO controller DTS binding.

Signed-off-by: Y Vo <yvo@apm.com>
---
.../devicetree/bindings/gpio/gpio-xgene-sb.txt | 31 ++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
new file mode 100644
index 0000000..3215e4d
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt
@@ -0,0 +1,31 @@
+APM X-Gene Standby GPIO controller bindings
+
+This is a gpio controller in standby domain.
+
+There are 20 GPIO pins from 0..21. There is no GPIO_DS14 and GPIO_DS15.
+Only GPIO_DS8..GPIO_DS13 support interrupt. IRQ mapping 0x28..0x2d.
+
+Required properties:
+- compatible: "apm,xgene-gpio-sb" for X-Gene Standby GPIO controller
+- reg: Physical base address and size of the controller's registers
+- #gpio-cells: Should be two.
+ - first cell is the pin number
+ - second cell is used to specify the gpio polarity:
+ 0 = active high
+ 1 = active low
+- gpio-controller: Marks the device node as a GPIO controller.
+- interrupts: Shall contains the interrupts.
+
+Example:
+ sbgpio: sbgpio at 17001000 {
+ compatible = "apm,xgene-gpio-sb";
+ reg = <0x0 0x17001000 0x0 0x400>;
+ #gpio-cells = <2>;
+ gpio-controller;
+ interrupts = <0x0 0x28 0x1>,
+ <0x0 0x29 0x1>,
+ <0x0 0x2a 0x1>,
+ <0x0 0x2b 0x1>,
+ <0x0 0x2c 0x1>,
+ <0x0 0x2d 0x1>;
+ };
--
1.7.9.5

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