forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
27 lines
735 B
27 lines
735 B
* Generic 8-bits shift register GPIO driver |
|
|
|
Required properties: |
|
- compatible: Should contain one of the following: |
|
"fairchild,74hc595" |
|
"nxp,74lvc594" |
|
- 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 |
|
|
|
Optional properties: |
|
- enable-gpios: GPIO connected to the OE (Output Enable) pin. |
|
|
|
Example: |
|
|
|
gpio5: gpio5@0 { |
|
compatible = "fairchild,74hc595"; |
|
reg = <0>; |
|
gpio-controller; |
|
#gpio-cells = <2>; |
|
registers-number = <4>; |
|
spi-max-frequency = <100000>; |
|
};
|
|
|