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Documentation / devicetree / bindings / gpio / gpio-74x164.txt




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Based on kernel version 3.15.4. Page generated on 2014-07-07 09:00 EST.

1	* Generic 8-bits shift register GPIO driver
2	
3	Required properties:
4	- compatible : Should be "fairchild,74hc595"
5	- reg : chip select number
6	- gpio-controller : Marks the device node as a gpio controller.
7	- #gpio-cells : Should be two.  The first cell is the pin number and
8	  the second cell is used to specify the gpio polarity:
9	      0 = active high
10	      1 = active low
11	- registers-number: Number of daisy-chained shift registers
12	
13	Example:
14	
15	gpio5: gpio5@0 {
16		compatible = "fairchild,74hc595";
17		reg = <0>;
18		gpio-controller;
19		#gpio-cells = <2>;
20		registers-number = <4>;
21		spi-max-frequency = <100000>;
22	};
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