[PATCH 1/2] DT: Add documentation for gpio-ralink
From: John Crispin <hidden>
Date: 2013-08-08 09:46:07
Also in:
linux-devicetree
Subsystem:
gpio subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Linus Walleij, Bartosz Golaszewski, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Describe gpio-ralink binding. Signed-off-by: John Crispin <redacted> Cc: linux-mips@linux-mips.org Cc: devicetree@vger.kernel.org Cc: linux-gpio@vger.kernel.org --- .../devicetree/bindings/gpio/gpio-ralink.txt | 40 ++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-ralink.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-ralink.txt b/Documentation/devicetree/bindings/gpio/gpio-ralink.txt
new file mode 100644
index 0000000..b4acf02
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-ralink.txt@@ -0,0 +1,40 @@ +Ralink SoC GPIO controller bindings + +Required properties: +- compatible: + - "ralink,rt2880-gpio" for Ralink controllers +- #gpio-cells : Should be two. + - first cell is the pin number + - second cell is used to specify optional parameters (unused) +- gpio-controller : Marks the device node as a GPIO controller +- reg : Physical base address and length of the controller's registers +- interrupt-parent: phandle to the INTC device node +- interrupts : Specify the INTC interrupt number +- ralink,num-gpios : Specify the number of GPIOs +- ralink,register-map : The register layout depends on the GPIO bank and actual + SoC type. Register offsets need to be in this order. + [ INT, EDGE, RENA, FENA, DATA, DIR, POL, SET, RESET, TOGGLE ] + +Optional properties: +- ralink,gpio-base : Specify the GPIO chips base number + +Example: + + gpio0: gpio@600 { + compatible = "ralink,rt5350-gpio", "ralink,rt2880-gpio"; + + #gpio-cells = <2>; + gpio-controller; + + reg = <0x600 0x34>; + + interrupt-parent = <&intc>; + interrupts = <6>; + + ralink,gpio-base = <0>; + ralink,num-gpios = <24>; + ralink,register-map = [ 00 04 08 0c + 20 24 28 2c + 30 34 ]; + + };
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1.7.10.4