projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 604b2579 | 1 | Broadcom iProc GPIO/PINCONF Controller |
| 2dffad82 RJ |
2 | |
| 3 | Required properties: | |
| 4 | ||
| 5 | - compatible: | |
| e0548004 PK |
6 | Must be "brcm,cygnus-ccm-gpio", "brcm,cygnus-asiu-gpio", |
| 7 | "brcm,cygnus-crmu-gpio" or "brcm,iproc-gpio" | |
| 2dffad82 RJ |
8 | |
| 9 | - reg: | |
| 604b2579 | 10 | Define the base and range of the I/O address space that contains SoC |
| 2dffad82 RJ |
11 | GPIO/PINCONF controller registers |
| 12 | ||
| 2652df63 PK |
13 | - ngpios: |
| 14 | Total number of in-use slots in GPIO controller | |
| 15 | ||
| 2dffad82 RJ |
16 | - #gpio-cells: |
| 17 | Must be two. The first cell is the GPIO pin number (within the | |
| 18 | controller's pin space) and the second cell is used for the following: | |
| 19 | bit[0]: polarity (0 for active high and 1 for active low) | |
| 20 | ||
| 21 | - gpio-controller: | |
| 22 | Specifies that the node is a GPIO controller | |
| 23 | ||
| 24 | Optional properties: | |
| 25 | ||
| 26 | - interrupts: | |
| 27 | Interrupt ID | |
| 28 | ||
| 29 | - interrupt-controller: | |
| 30 | Specifies that the node is an interrupt controller | |
| 31 | ||
| 03e09bc1 PK |
32 | - gpio-ranges: |
| 33 | Specifies the mapping between gpio controller and pin-controllers pins. | |
| 34 | This requires 4 fields in cells defined as - | |
| 35 | 1. Phandle of pin-controller. | |
| 36 | 2. GPIO base pin offset. | |
| 37 | 3 Pin-control base pin offset. | |
| 38 | 4. number of gpio pins which are linearly mapped from pin base. | |
| 2dffad82 RJ |
39 | |
| 40 | Supported generic PINCONF properties in child nodes: | |
| 41 | ||
| 42 | - pins: | |
| 43 | The list of pins (within the controller's own pin space) that properties | |
| 44 | in the node apply to. Pin names are "gpio-<pin>" | |
| 45 | ||
| 46 | - bias-disable: | |
| 47 | Disable pin bias | |
| 48 | ||
| 49 | - bias-pull-up: | |
| 50 | Enable internal pull up resistor | |
| 51 | ||
| 52 | - bias-pull-down: | |
| 53 | Enable internal pull down resistor | |
| 54 | ||
| 55 | - drive-strength: | |
| 56 | Valid drive strength values include 2, 4, 6, 8, 10, 12, 14, 16 (mA) | |
| 57 | ||
| 58 | Example: | |
| 59 | gpio_ccm: gpio@1800a000 { | |
| 60 | compatible = "brcm,cygnus-ccm-gpio"; | |
| 61 | reg = <0x1800a000 0x50>, | |
| 62 | <0x0301d164 0x20>; | |
| 2652df63 | 63 | ngpios = <24>; |
| 2dffad82 RJ |
64 | #gpio-cells = <2>; |
| 65 | gpio-controller; | |
| 66 | interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>; | |
| 67 | interrupt-controller; | |
| 68 | ||
| 69 | touch_pins: touch_pins { | |
| 70 | pwr: pwr { | |
| 71 | pins = "gpio-0"; | |
| 72 | drive-strength = <16>; | |
| 73 | }; | |
| 74 | ||
| 75 | event: event { | |
| 76 | pins = "gpio-1"; | |
| 77 | bias-pull-up; | |
| 78 | }; | |
| 79 | }; | |
| 80 | }; | |
| 81 | ||
| 82 | gpio_asiu: gpio@180a5000 { | |
| 83 | compatible = "brcm,cygnus-asiu-gpio"; | |
| 84 | reg = <0x180a5000 0x668>; | |
| 2652df63 | 85 | ngpios = <146>; |
| 2dffad82 RJ |
86 | #gpio-cells = <2>; |
| 87 | gpio-controller; | |
| 88 | interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>; | |
| 89 | interrupt-controller; | |
| 03e09bc1 PK |
90 | gpio-ranges = <&pinctrl 0 42 1>, |
| 91 | <&pinctrl 1 44 3>; | |
| 2dffad82 RJ |
92 | }; |
| 93 | ||
| 94 | /* | |
| 95 | * Touchscreen that uses the CCM GPIO 0 and 1 | |
| 96 | */ | |
| 97 | tsc { | |
| 98 | ... | |
| 99 | ... | |
| 100 | gpio-pwr = <&gpio_ccm 0 0>; | |
| 101 | gpio-event = <&gpio_ccm 1 0>; | |
| 102 | }; | |
| 103 | ||
| 104 | /* Bluetooth that uses the ASIU GPIO 5, with polarity inverted */ | |
| 105 | bluetooth { | |
| 106 | ... | |
| 107 | ... | |
| 108 | bcm,rfkill-bank-sel = <&gpio_asiu 5 1> | |
| 109 | } |