1Broadcom Kona Family GPIO
2=========================
3
4This GPIO driver is used in the following Broadcom SoCs:
5  BCM11130, BCM11140, BCM11351, BCM28145, BCM28155
6
7The Broadcom GPIO Controller IP can be configured prior to synthesis to
8support up to 8 banks of 32 GPIOs where each bank has its own IRQ. The
9GPIO controller only supports edge, not level, triggering of interrupts.
10
11Required 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
37Example:
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	};
53