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Diffstat (limited to 'Documentation/devicetree/bindings/gpio/gpio-aspeed.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-aspeed.txt | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt b/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt new file mode 100644 index 000000000..b2033fc3a --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt @@ -0,0 +1,39 @@ +Aspeed GPIO controller Device Tree Bindings +------------------------------------------- + +Required properties: +- compatible : Either "aspeed,ast2400-gpio", "aspeed,ast2500-gpio", + or "aspeed,ast2600-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: + +- clocks : A phandle to the clock to use for debounce timings +- ngpios : Number of GPIOs controlled by this controller. Should be set + when there are multiple GPIO controllers on a SoC (ast2600). + +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; + }; |