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Diffstat (limited to 'Documentation/devicetree/bindings/gpio/gpio-bcm-kona.txt')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-bcm-kona.txt | 52 |
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diff --git a/Documentation/devicetree/bindings/gpio/gpio-bcm-kona.txt b/Documentation/devicetree/bindings/gpio/gpio-bcm-kona.txt new file mode 100644 index 000000000000..4a63bc96b687 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-bcm-kona.txt | |||
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1 | Broadcom Kona Family GPIO | ||
2 | ========================= | ||
3 | |||
4 | This GPIO driver is used in the following Broadcom SoCs: | ||
5 | BCM11130, BCM11140, BCM11351, BCM28145, BCM28155 | ||
6 | |||
7 | The Broadcom GPIO Controller IP can be configured prior to synthesis to | ||
8 | support up to 8 banks of 32 GPIOs where each bank has its own IRQ. The | ||
9 | GPIO controller only supports edge, not level, triggering of interrupts. | ||
10 | |||
11 | Required properties | ||
12 | ------------------- | ||
13 | |||
14 | - compatible: "brcm,bcm11351-gpio", "brcm,kona-gpio" | ||
15 | - reg: Physical base address and length of the controller's registers. | ||
16 | - interrupts: The interrupt outputs from the controller. There is one GPIO | ||
17 | interrupt per GPIO bank. The number of interrupts listed depends on the | ||
18 | number of GPIO banks on the SoC. The interrupts must be ordered by bank, | ||
19 | starting with bank 0. There is always a 1:1 mapping between banks and | ||
20 | IRQs. | ||
21 | - #gpio-cells: Should be <2>. The first cell is the pin number, the second | ||
22 | cell is used to specify optional parameters: | ||
23 | - bit 0 specifies polarity (0 for normal, 1 for inverted) | ||
24 | See also "gpio-specifier" in .../devicetree/bindings/gpio/gpio.txt. | ||
25 | - #interrupt-cells: Should be <2>. The first cell is the GPIO number. The | ||
26 | second cell is used to specify flags. The following subset of flags is | ||
27 | supported: | ||
28 | - trigger type (bits[1:0]): | ||
29 | 1 = low-to-high edge triggered. | ||
30 | 2 = high-to-low edge triggered. | ||
31 | 3 = low-to-high or high-to-low edge triggered | ||
32 | Valid values are 1, 2, 3 | ||
33 | See also .../devicetree/bindings/interrupt-controller/interrupts.txt. | ||
34 | - gpio-controller: Marks the device node as a GPIO controller. | ||
35 | - interrupt-controller: Marks the device node as an interrupt controller. | ||
36 | |||
37 | Example: | ||
38 | gpio: gpio@35003000 { | ||
39 | compatible = "brcm,bcm11351-gpio", "brcm,kona-gpio"; | ||
40 | reg = <0x35003000 0x800>; | ||
41 | interrupts = | ||
42 | <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH | ||
43 | GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH | ||
44 | GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH | ||
45 | GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH | ||
46 | GIC_SPI 112 IRQ_TYPE_LEVEL_HIGH | ||
47 | GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>; | ||
48 | #gpio-cells = <2>; | ||
49 | #interrupt-cells = <2>; | ||
50 | gpio-controller; | ||
51 | interrupt-controller; | ||
52 | }; | ||