Commit | Line | Data |
---|---|---|
3391811c | 1 | NVIDIA Tegra GPIO controller |
df221227 GL |
2 | |
3 | Required properties: | |
3391811c | 4 | - compatible : "nvidia,tegra<chip>-gpio" |
a38b84fc | 5 | - reg : Physical base address and length of the controller's registers. |
3391811c SW |
6 | - interrupts : The interrupt outputs from the controller. For Tegra20, |
7 | there should be 7 interrupts specified, and for Tegra30, there should | |
8 | be 8 interrupts specified. | |
df221227 | 9 | - #gpio-cells : Should be two. The first cell is the pin number and the |
eb5064db OJ |
10 | second cell is used to specify optional parameters: |
11 | - bit 0 specifies polarity (0 for normal, 1 for inverted) | |
df221227 | 12 | - gpio-controller : Marks the device node as a GPIO controller. |
6f74dc9b SW |
13 | - #interrupt-cells : Should be 2. |
14 | The first cell is the GPIO number. | |
15 | The second cell is used to specify flags: | |
16 | bits[3:0] trigger type and level flags: | |
17 | 1 = low-to-high edge triggered. | |
18 | 2 = high-to-low edge triggered. | |
19 | 4 = active high level-sensitive. | |
20 | 8 = active low level-sensitive. | |
21 | Valid combinations are 1, 2, 3, 4, 8. | |
22 | - interrupt-controller : Marks the device node as an interrupt controller. | |
a38b84fc SW |
23 | |
24 | Example: | |
25 | ||
26 | gpio: gpio@6000d000 { | |
27 | compatible = "nvidia,tegra20-gpio"; | |
28 | reg = < 0x6000d000 0x1000 >; | |
29 | interrupts = < 0 32 0x04 | |
30 | 0 33 0x04 | |
31 | 0 34 0x04 | |
32 | 0 35 0x04 | |
33 | 0 55 0x04 | |
34 | 0 87 0x04 | |
35 | 0 89 0x04 >; | |
36 | #gpio-cells = <2>; | |
37 | gpio-controller; | |
6f74dc9b SW |
38 | #interrupt-cells = <2>; |
39 | interrupt-controller; | |
a38b84fc | 40 | }; |