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bindings: update imx and mxs #gpio-cells

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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>
This commit is contained in:
Shawn Guo 2012-06-28 11:15:37 +08:00
parent 77ac32ad2b
commit c1cb438522
2 changed files with 6 additions and 4 deletions
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5
Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt
View File

@ -8,8 +8,9 @@ Required properties:
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 optional parameters (currently
unused).
the second cell is used to specify the gpio polarity:
0 = active high
1 = active low
Example:

5
Documentation/devicetree/bindings/gpio/gpio-mxs.txt
View File

@ -13,8 +13,9 @@ Required properties for GPIO node:
- interrupts : Should be the port interrupt shared by all 32 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 optional parameters (currently
unused).
the second cell is used to specify the gpio polarity:
0 = active high
1 = active low
- interrupt-controller: Marks the device node as an interrupt controller.
- #interrupt-cells : Should be 2. The first cell is the GPIO number.
The second cell bits[3:0] is used to specify trigger type and level flags: