projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 580b9676 SA |
1 | * Freescale VF610 PORT/GPIO module |
| 2 | ||
| 3 | The Freescale PORT/GPIO modules are two adjacent modules providing GPIO | |
| 4 | functionality. Each pair serves 32 GPIOs. The VF610 has 5 instances of | |
| 5 | each, and each PORT module has its own interrupt. | |
| 6 | ||
| 7 | Required properties for GPIO node: | |
| 8 | - compatible : Should be "fsl,<soc>-gpio", currently "fsl,vf610-gpio" | |
| 9 | - reg : The first reg tuple represents the PORT module, the second tuple | |
| 10 | the GPIO module. | |
| 11 | - interrupts : Should be the port interrupt shared by all 32 pins. | |
| 12 | - gpio-controller : Marks the device node as a gpio controller. | |
| 13 | - #gpio-cells : Should be two. The first cell is the pin number and | |
| 14 | the second cell is used to specify the gpio polarity: | |
| 15 | 0 = active high | |
| 16 | 1 = active low | |
| 17 | - interrupt-controller: Marks the device node as an interrupt controller. | |
| 18 | - #interrupt-cells : Should be 2. The first cell is the GPIO number. | |
| 19 | The second cell bits[3:0] is used to specify trigger type and level flags: | |
| 20 | 1 = low-to-high edge triggered. | |
| 21 | 2 = high-to-low edge triggered. | |
| 22 | 4 = active high level-sensitive. | |
| 23 | 8 = active low level-sensitive. | |
| 24 | ||
| 25 | Note: Each GPIO port should have an alias correctly numbered in "aliases" | |
| 26 | node. | |
| 27 | ||
| 28 | Examples: | |
| 29 | ||
| 30 | aliases { | |
| 31 | gpio0 = &gpio1; | |
| 32 | gpio1 = &gpio2; | |
| 33 | }; | |
| 34 | ||
| 35 | gpio1: gpio@40049000 { | |
| 36 | compatible = "fsl,vf610-gpio"; | |
| 37 | reg = <0x40049000 0x1000 0x400ff000 0x40>; | |
| 38 | interrupts = <0 107 IRQ_TYPE_LEVEL_HIGH>; | |
| 39 | gpio-controller; | |
| 40 | #gpio-cells = <2>; | |
| 41 | interrupt-controller; | |
| 42 | #interrupt-cells = <2>; | |
| 43 | gpio-ranges = <&iomuxc 0 0 32>; | |
| 44 | }; | |
| 45 | ||
| 46 | gpio2: gpio@4004a000 { | |
| 47 | compatible = "fsl,vf610-gpio"; | |
| 48 | reg = <0x4004a000 0x1000 0x400ff040 0x40>; | |
| 49 | interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>; | |
| 50 | gpio-controller; | |
| 51 | #gpio-cells = <2>; | |
| 52 | interrupt-controller; | |
| 53 | #interrupt-cells = <2>; | |
| 54 | gpio-ranges = <&iomuxc 0 32 32>; | |
| 55 | }; |