63 lines
1.6 KiB
Plaintext
63 lines
1.6 KiB
Plaintext
Davinci/Keystone GPIO controller bindings
|
|
|
|
Required Properties:
|
|
- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio"
|
|
|
|
- reg: Physical base address of the controller and the size of memory mapped
|
|
registers.
|
|
|
|
- gpio-controller : Marks the device node as a gpio controller.
|
|
|
|
- #gpio-cells : Should be two.
|
|
- first cell is the pin number
|
|
- second cell is used to specify optional parameters (unused)
|
|
|
|
- interrupt-parent: phandle of the parent interrupt controller.
|
|
|
|
- interrupts: Array of GPIO interrupt number. Only banked or unbanked IRQs are
|
|
supported at a time.
|
|
|
|
- ti,ngpio: The number of GPIO pins supported.
|
|
|
|
- ti,davinci-gpio-unbanked: The number of GPIOs that have an individual interrupt
|
|
line to processor.
|
|
|
|
The GPIO controller also acts as an interrupt controller. It uses the default
|
|
two cells specifier as described in Documentation/devicetree/bindings/
|
|
interrupt-controller/interrupts.txt.
|
|
|
|
Example:
|
|
|
|
gpio: gpio@1e26000 {
|
|
compatible = "ti,dm6441-gpio";
|
|
gpio-controller;
|
|
#gpio-cells = <2>;
|
|
reg = <0x226000 0x1000>;
|
|
interrupt-parent = <&intc>;
|
|
interrupts = <42 IRQ_TYPE_EDGE_BOTH 43 IRQ_TYPE_EDGE_BOTH
|
|
44 IRQ_TYPE_EDGE_BOTH 45 IRQ_TYPE_EDGE_BOTH
|
|
46 IRQ_TYPE_EDGE_BOTH 47 IRQ_TYPE_EDGE_BOTH
|
|
48 IRQ_TYPE_EDGE_BOTH 49 IRQ_TYPE_EDGE_BOTH
|
|
50 IRQ_TYPE_EDGE_BOTH>;
|
|
ti,ngpio = <144>;
|
|
ti,davinci-gpio-unbanked = <0>;
|
|
interrupt-controller;
|
|
#interrupt-cells = <2>;
|
|
};
|
|
|
|
leds {
|
|
compatible = "gpio-leds";
|
|
|
|
led1 {
|
|
label = "davinci:green:usr1";
|
|
gpios = <&gpio 10 GPIO_ACTIVE_HIGH>;
|
|
...
|
|
};
|
|
|
|
led2 {
|
|
label = "davinci:red:debug1";
|
|
gpios = <&gpio 11 GPIO_ACTIVE_HIGH>;
|
|
...
|
|
};
|
|
};
|