projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3619ac02 TP |
1 | * Marvell EBU GPIO controller |
| 2 | ||
| 3 | Required properties: | |
| 4 | ||
| 5 | - compatible : Should be "marvell,orion-gpio", "marvell,mv78200-gpio" | |
| 6 | or "marvell,armadaxp-gpio". "marvell,orion-gpio" should be used for | |
| 7 | Orion, Kirkwood, Dove, Discovery (except MV78200) and Armada | |
| 8 | 370. "marvell,mv78200-gpio" should be used for the Discovery | |
| 9 | MV78200. "marvel,armadaxp-gpio" should be used for all Armada XP | |
| 10 | SoCs (MV78230, MV78260, MV78460). | |
| 11 | ||
| 12 | - reg: Address and length of the register set for the device. Only one | |
| 13 | entry is expected, except for the "marvell,armadaxp-gpio" variant | |
| 14 | for which two entries are expected: one for the general registers, | |
| 15 | one for the per-cpu registers. | |
| 16 | ||
| 17 | - interrupts: The list of interrupts that are used for all the pins | |
| 18 | managed by this GPIO bank. There can be more than one interrupt | |
| 19 | (example: 1 interrupt per 8 pins on Armada XP, which means 4 | |
| 20 | interrupts per bank of 32 GPIOs). | |
| 21 | ||
| 22 | - interrupt-controller: identifies the node as an interrupt controller | |
| 23 | ||
| 24 | - #interrupt-cells: specifies the number of cells needed to encode an | |
| 25 | interrupt source. Should be two. | |
| 26 | The first cell is the GPIO number. | |
| 27 | The second cell is used to specify flags: | |
| 28 | bits[3:0] trigger type and level flags: | |
| 29 | 1 = low-to-high edge triggered. | |
| 30 | 2 = high-to-low edge triggered. | |
| 31 | 4 = active high level-sensitive. | |
| 32 | 8 = active low level-sensitive. | |
| 33 | ||
| 34 | - gpio-controller: marks the device node as a gpio controller | |
| 35 | ||
| 36 | - ngpios: number of GPIOs this controller has | |
| 37 | ||
| 38 | - #gpio-cells: Should be two. The first cell is the pin number. The | |
| 39 | second cell is reserved for flags, unused at the moment. | |
| 40 | ||
| 41 | Example: | |
| 42 | ||
| 43 | gpio0: gpio@d0018100 { | |
| 44 | compatible = "marvell,armadaxp-gpio"; | |
| 45 | reg = <0xd0018100 0x40>, | |
| 46 | <0xd0018800 0x30>; | |
| 47 | ngpios = <32>; | |
| 48 | gpio-controller; | |
| 49 | #gpio-cells = <2>; | |
| 50 | interrupt-controller; | |
| 51 | #interrupt-cells = <2>; | |
| 52 | interrupts = <16>, <17>, <18>, <19>; | |
| 53 | }; |