linux/Documentation/devicetree/bindings/gpio/mrvl-gpio.txt
Vijay Kumar 1e0ced0948 ARM: dts: pxa: fix no. of gpio cells in the pxa gpio binding documentation
Fix the no. of gpio cells in pxa gpio binding documentation.

The no. of gpio cells for the pxa gpio is actually 2. But is
incorrectly specified as 1, in the binding documentation. From the
driver code, the second cell specifies the standard flags as described
in gpio.txt.

Signed-off-by: Vijay Kumar B. <vijaykumar@zilogic.com>
[fixed subject line]
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
2016-11-18 17:09:43 +01:00

49 lines
1.6 KiB
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* Marvell PXA GPIO controller
Required properties:
- compatible : Should be "intel,pxa25x-gpio", "intel,pxa26x-gpio",
"intel,pxa27x-gpio", "intel,pxa3xx-gpio",
"marvell,pxa93x-gpio", "marvell,mmp-gpio",
"marvell,mmp2-gpio" or marvell,pxa1928-gpio.
- reg : Address and length of the register set for the device
- interrupts : Should be the port interrupt shared by all gpio pins.
There're three gpio interrupts in arch-pxa, and they're gpio0,
gpio1 and gpio_mux. There're only one gpio interrupt in arch-mmp,
gpio_mux.
- interrupt-names : Should be the names of irq resources. Each interrupt
uses its own interrupt name, so there should be as many interrupt names
as referenced interrupts.
- interrupt-controller : Identifies the node as an interrupt controller.
- #interrupt-cells: Specifies the number of cells needed to encode an
interrupt source.
- gpio-controller : Marks the device node as a gpio controller.
- #gpio-cells : Should be two. The first cell is the pin number and
the second cell is used to specify flags. See gpio.txt for possible
values.
Example for a MMP platform:
gpio: gpio@d4019000 {
compatible = "marvell,mmp-gpio";
reg = <0xd4019000 0x1000>;
interrupts = <49>;
interrupt-names = "gpio_mux";
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
};
Example for a PXA3xx platform:
gpio: gpio@40e00000 {
compatible = "intel,pxa3xx-gpio";
reg = <0x40e00000 0x10000>;
interrupt-names = "gpio0", "gpio1", "gpio_mux";
interrupts = <8 9 10>;
gpio-controller;
#gpio-cells = <0x2>;
interrupt-controller;
#interrupt-cells = <0x2>;
};