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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>;
};
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