From 19de85134ee92d927044cc620961a322bfde9119 Mon Sep 17 00:00:00 2001 From: Andrew Jeffery Date: Tue, 30 Aug 2016 17:24:23 +0930 Subject: gpio: dt-bindings: Add documentation for Aspeed GPIO controllers Signed-off-by: Andrew Jeffery Acked-by: Joel Stanley Acked-by: Rob Herring Signed-off-by: Linus Walleij --- .../devicetree/bindings/gpio/gpio-aspeed.txt | 36 ++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-aspeed.txt (limited to 'Documentation/devicetree/bindings/gpio') diff --git a/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt b/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt new file mode 100644 index 000000000000..393bb2ed8a77 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt @@ -0,0 +1,36 @@ +Aspeed GPIO controller Device Tree Bindings +------------------------------------------- + +Required properties: +- compatible : Either "aspeed,ast2400-gpio" or "aspeed,ast2500-gpio" + +- #gpio-cells : Should be two + - First cell is the GPIO line number + - Second cell is used to specify optional + parameters (unused) + +- reg : Address and length of the register set for the device +- gpio-controller : Marks the device node as a GPIO controller. +- interrupts : Interrupt specifier (see interrupt bindings for + details) +- interrupt-controller : Mark the GPIO controller as an interrupt-controller + +Optional properties: + +- interrupt-parent : The parent interrupt controller, optional if inherited + +The gpio and interrupt properties are further described in their respective +bindings documentation: + +- Documentation/devicetree/bindings/gpio/gpio.txt +- Documentation/devicetree/bindings/interrupt-controller/interrupts.txt + + Example: + gpio@1e780000 { + #gpio-cells = <2>; + compatible = "aspeed,ast2400-gpio"; + gpio-controller; + interrupts = <20>; + reg = <0x1e780000 0x1000>; + interrupt-controller; + }; -- cgit