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authorStefan Agner <stefan@agner.ch>2014-10-16 21:48:00 +0200
committerLinus Walleij <linus.walleij@linaro.org>2014-10-24 14:22:27 +0200
commit580b9676e53af8f037002c16bafc7037319bbbce (patch)
tree5cd57061b62439eacf0929e5feafa583e9f3fd80 /Documentation/devicetree/bindings/gpio
parent7f2691a19627a8d7723909b6e82468fd4437e445 (diff)
Documentation: dts: add bindings for Vybrid GPIO/PORT module
The Vybrid SoC device tree (vf610.dtsi) used this bindings since its initial commit in May 2013. However, a proper gpiolib driver was missing so far. With the addition of the gpiolib driver, the bindings proved to be useful and complete, hence a good time to add the documentation. Signed-off-by: Stefan Agner <stefan@agner.ch> Acked-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio-vf610.txt55
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diff --git a/Documentation/devicetree/bindings/gpio/gpio-vf610.txt b/Documentation/devicetree/bindings/gpio/gpio-vf610.txt
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+++ b/Documentation/devicetree/bindings/gpio/gpio-vf610.txt
@@ -0,0 +1,55 @@
+* Freescale VF610 PORT/GPIO module
+
+The Freescale PORT/GPIO modules are two adjacent modules providing GPIO
+functionality. Each pair serves 32 GPIOs. The VF610 has 5 instances of
+each, and each PORT module has its own interrupt.
+
+Required properties for GPIO node:
+- compatible : Should be "fsl,<soc>-gpio", currently "fsl,vf610-gpio"
+- reg : The first reg tuple represents the PORT module, the second tuple
+ the GPIO module.
+- interrupts : Should be the port interrupt shared by all 32 pins.
+- gpio-controller : Marks the device node as a gpio controller.
+- #gpio-cells : Should be two. The first cell is the pin number and
+ the second cell is used to specify the gpio polarity:
+ 0 = active high
+ 1 = active low
+- interrupt-controller: Marks the device node as an interrupt controller.
+- #interrupt-cells : Should be 2. The first cell is the GPIO number.
+ The second cell bits[3:0] is used to specify trigger type and level flags:
+ 1 = low-to-high edge triggered.
+ 2 = high-to-low edge triggered.
+ 4 = active high level-sensitive.
+ 8 = active low level-sensitive.
+
+Note: Each GPIO port should have an alias correctly numbered in "aliases"
+node.
+
+Examples:
+
+aliases {
+ gpio0 = &gpio1;
+ gpio1 = &gpio2;
+};
+
+gpio1: gpio@40049000 {
+ compatible = "fsl,vf610-gpio";
+ reg = <0x40049000 0x1000 0x400ff000 0x40>;
+ interrupts = <0 107 IRQ_TYPE_LEVEL_HIGH>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ gpio-ranges = <&iomuxc 0 0 32>;
+};
+
+gpio2: gpio@4004a000 {
+ compatible = "fsl,vf610-gpio";
+ reg = <0x4004a000 0x1000 0x400ff040 0x40>;
+ interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ gpio-ranges = <&iomuxc 0 32 32>;
+};

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