gpio: 74x164: dts: Add documentation for the dt binding

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Maxime Ripard 2012-09-10 22:35:40 +02:00 committed by Linus Walleij
parent 4485a12937
commit a7ff477bb7
1 changed files with 22 additions and 0 deletions

View File

@ -0,0 +1,22 @@
* 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>;
};