12345678910111213141516171819202122 |
- * Generic 8-bits shift register GPIO driver
- Required properties:
- - compatible : Should be "fairchild,74hc595"
- - reg : chip select number
- - 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
- - registers-number: Number of daisy-chained shift registers
- Example:
- gpio5: gpio5@0 {
- compatible = "fairchild,74hc595";
- reg = <0>;
- gpio-controller;
- #gpio-cells = <2>;
- registers-number = <4>;
- spi-max-frequency = <100000>;
- };
|