提交 5b7d414a 编写于 作者: G Gregory Fong 提交者: Linus Walleij

dt-bindings: add brcmstb-gpio GPIO binding

Add binding for Broadcom STB "UPG GIO" GPIO controller.
Signed-off-by: NGregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
上级 cef1717b
Broadcom STB "UPG GIO" GPIO controller
The controller's registers are organized as sets of eight 32-bit
registers with each set controlling a bank of up to 32 pins. A single
interrupt is shared for all of the banks handled by the controller.
Required properties:
- compatible:
Must be "brcm,brcmstb-gpio"
- reg:
Define the base and range of the I/O address space containing
the brcmstb GPIO controller registers
- #gpio-cells:
Should be <2>. The first cell is the pin number (within the controller's
pin space), and the second is used for the following:
bit[0]: polarity (0 for active-high, 1 for active-low)
- gpio-controller:
Specifies that the node is a GPIO controller.
- brcm,gpio-bank-widths:
Number of GPIO lines for each bank. Number of elements must
correspond to number of banks suggested by the 'reg' property.
Optional properties:
- interrupts:
The interrupt shared by all GPIO lines for this controller.
- interrupt-parent:
phandle of the parent interrupt controller
- #interrupt-cells:
Should be <2>. The first cell is the GPIO number, the second should specify
flags. The following subset of flags is supported:
- bits[3:0] trigger type and level flags
1 = low-to-high edge triggered
2 = high-to-low edge triggered
4 = active high level-sensitive
8 = active low level-sensitive
Valid combinations are 1, 2, 3, 4, 8.
See also Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
- interrupt-controller:
Marks the device node as an interrupt controller
- interrupt-names:
The name of the IRQ resource used by this controller
Example:
upg_gio: gpio@f040a700 {
#gpio-cells = <0x2>;
#interrupt-cells = <0x2>;
compatible = "brcm,bcm7445-gpio", "brcm,brcmstb-gpio";
gpio-controller;
interrupt-controller;
reg = <0xf040a700 0x80>;
interrupt-parent = <0xf>;
interrupts = <0x6>;
interrupt-names = "upg_gio";
brcm,gpio-bank-widths = <0x20 0x20 0x20 0x18>;
};
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