| 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; |
| }; |
