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-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>;
- };