From 7a839e9a277d4a410a9b015d561ff09739bc0ff6 Mon Sep 17 00:00:00 2001 From: Y Vo Date: Fri, 16 Jan 2015 14:34:20 +0700 Subject: [PATCH] Documentation: gpio: Add APM X-Gene standby GPIO controller DTS binding Documentation for APM X-Gene standby GPIO controller DTS binding. Signed-off-by: Y Vo [Some spelling and various fixes] Signed-off-by: Linus Walleij --- .../bindings/gpio/gpio-xgene-sb.txt | 32 +++++++++++++++++++ 1 file changed, 32 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 000000000000..dae130060537 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-xgene-sb.txt @@ -0,0 +1,32 @@ +APM X-Gene Standby GPIO controller bindings + +This is a gpio controller in the standby domain. + +There are 20 GPIO pins from 0..21. There is no GPIO_DS14 or GPIO_DS15, +only GPIO_DS8..GPIO_DS13 support interrupts. The IRQ mapping +is currently 1-to-1 on interrupts 0x28 thru 0x2d. + +Required properties: +- compatible: "apm,xgene-gpio-sb" for the 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 contain exactly 6 interrupts. + +Example: + sbgpio: sbgpio@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>; + }; -- 2.39.5