| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | * 74XX MMIO GPIO driver |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible: Should contain one of the following: |
| 5 | "ti,741g125": for 741G125 (1-bit Input), |
| 6 | "ti,741g174": for 741G74 (1-bit Output), |
| 7 | "ti,742g125": for 742G125 (2-bit Input), |
| 8 | "ti,7474" : for 7474 (2-bit Output), |
| 9 | "ti,74125" : for 74125 (4-bit Input), |
| 10 | "ti,74175" : for 74175 (4-bit Output), |
| 11 | "ti,74365" : for 74365 (6-bit Input), |
| 12 | "ti,74174" : for 74174 (6-bit Output), |
| 13 | "ti,74244" : for 74244 (8-bit Input), |
| 14 | "ti,74273" : for 74273 (8-bit Output), |
| 15 | "ti,741624" : for 741624 (16-bit Input), |
| 16 | "ti,7416374": for 7416374 (16-bit Output). |
| 17 | - reg: Physical base address and length where IC resides. |
| 18 | - gpio-controller: Marks the device node as a gpio controller. |
| 19 | - #gpio-cells: Should be two. The first cell is the pin number and |
| 20 | the second cell is used to specify the GPIO polarity: |
| 21 | 0 = Active High, |
| 22 | 1 = Active Low. |
| 23 | |
| 24 | Example: |
| 25 | ctrl: gpio@30008004 { |
| 26 | compatible = "ti,74174"; |
| 27 | reg = <0x30008004 0x1>; |
| 28 | gpio-controller; |
| 29 | #gpio-cells = <2>; |
| 30 | }; |