c1cb438522
The of_get_named_gpio_flags can retrieve the second cell of gpio-specifier as the "flags". The imx and mxs gpio driver do not have their own .xlate callback, which means of_gpio_simple_xlate is used and it's a 1:1 mapping between gpio controller flags and Linux "enum of_gpio_flags". Update imx and mxs bindings document to make it clear. Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
24 lines
767 B
Plaintext
24 lines
767 B
Plaintext
* Freescale i.MX/MXC GPIO controller
|
|
|
|
Required properties:
|
|
- compatible : Should be "fsl,<soc>-gpio"
|
|
- reg : Address and length of the register set for the device
|
|
- interrupts : Should be the port interrupt shared by all 32 pins, if
|
|
one number. If two numbers, the first one is the interrupt shared
|
|
by low 16 pins and the second one is for high 16 pins.
|
|
- 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 the gpio polarity:
|
|
0 = active high
|
|
1 = active low
|
|
|
|
Example:
|
|
|
|
gpio0: gpio@73f84000 {
|
|
compatible = "fsl,imx51-gpio", "fsl,imx31-gpio";
|
|
reg = <0x73f84000 0x4000>;
|
|
interrupts = <50 51>;
|
|
gpio-controller;
|
|
#gpio-cells = <2>;
|
|
};
|