| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | Cirrus Logic CLPS711X GPIO controller |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible: Should be "cirrus,ep7209-gpio" |
| 5 | - reg: Physical base GPIO controller registers location and length. |
| 6 | There should be two registers, first is DATA register, the second |
| 7 | is DIRECTION. |
| 8 | - gpio-controller: Marks the device node as a gpio controller. |
| 9 | - #gpio-cells: Should be two. The first cell is the pin number and |
| 10 | the second cell is used to specify the gpio polarity: |
| 11 | 0 = active high |
| 12 | 1 = active low |
| 13 | |
| 14 | Note: Each GPIO port should have an alias correctly numbered in "aliases" |
| 15 | node. |
| 16 | |
| 17 | Example: |
| 18 | |
| 19 | aliases { |
| 20 | gpio0 = &porta; |
| 21 | }; |
| 22 | |
| 23 | porta: gpio@80000000 { |
| 24 | compatible = "cirrus,ep7312-gpio","cirrus,ep7209-gpio"; |
| 25 | reg = <0x80000000 0x1>, <0x80000040 0x1>; |
| 26 | gpio-controller; |
| 27 | #gpio-cells = <2>; |
| 28 | }; |