From 42fcb203e3a8682c41b6a22d2b3fd1457b407fb9 Mon Sep 17 00:00:00 2001 From: Nandor Han Date: Thu, 13 Apr 2017 13:27:50 +0300 Subject: gpio: Add XRA1403 DTS binding documentation Add the XRA1403 DTS binding documentation. Signed-off-by: Nandor Han Acked-by: Rob Herring Signed-off-by: Linus Walleij --- .../devicetree/bindings/gpio/gpio-xra1403.txt | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-xra1403.txt (limited to 'Documentation/devicetree/bindings/gpio') diff --git a/Documentation/devicetree/bindings/gpio/gpio-xra1403.txt b/Documentation/devicetree/bindings/gpio/gpio-xra1403.txt new file mode 100644 index 000000000000..e13cc399b363 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-xra1403.txt @@ -0,0 +1,46 @@ +GPIO Driver for XRA1403 16-BIT GPIO Expander With Reset Input from EXAR + +The XRA1403 is an 16-bit GPIO expander with an SPI interface. Features available: + - Individually programmable inputs: + - Internal pull-up resistors + - Polarity inversion + - Individual interrupt enable + - Rising edge and/or Falling edge interrupt + - Input filter + - Individually programmable outputs + - Output Level Control + - Output Three-State Control + +Properties +---------- +Check documentation for SPI and GPIO controllers regarding properties needed to configure the node. + + - compatible = "exar,xra1403". + - reg - SPI id of the device. + - gpio-controller - marks the node as gpio. + - #gpio-cells - should be two where the first cell is the pin number + and the second one is used for optional parameters. + +Optional properties: +------------------- + - reset-gpios: in case available used to control the device reset line. + - interrupt-controller - marks the node as interrupt controller. + - #interrupt-cells - should be two and represents the number of cells + needed to encode interrupt source. + +Example +-------- + + gpioxra0: gpio@2 { + compatible = "exar,xra1403"; + reg = <2>; + + gpio-controller; + #gpio-cells = <2>; + + interrupt-controller; + #interrupt-cells = <2>; + + reset-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>; + spi-max-frequency = <1000000>; + }; -- cgit v1.2.3