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APM X-Gene Standby GPIO controller bindings
This is a gpio controller in the standby domain.
There are 20 GPIO pins from 0..21. There is no GPIO_DS14 or GPIO_DS15,
only GPIO_DS8..GPIO_DS13 support interrupts. The IRQ mapping
is currently 1-to-1 on interrupts 0x28 thru 0x2d.
Required properties:
- compatible: "apm,xgene-gpio-sb" for the X-Gene Standby GPIO controller
- reg: Physical base address and size of the controller's registers
- #gpio-cells: Should be two.
- first cell is the pin number
- second cell is used to specify the gpio polarity:
0 = active high
1 = active low
- gpio-controller: Marks the device node as a GPIO controller.
- interrupts: Shall contain exactly 6 interrupts.
Example:
sbgpio: sbgpio@17001000 {
compatible = "apm,xgene-gpio-sb";
reg = <0x0 0x17001000 0x0 0x400>;
#gpio-cells = <2>;
gpio-controller;
interrupts = <0x0 0x28 0x1>,
<0x0 0x29 0x1>,
<0x0 0x2a 0x1>,
<0x0 0x2b 0x1>,
<0x0 0x2c 0x1>,
<0x0 0x2d 0x1>;
};
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