diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2012-06-28 07:15:37 +0400 |
|---|---|---|
| committer | Shawn Guo <shawn.guo@linaro.org> | 2012-07-06 15:57:42 +0400 |
| commit | c1cb438522f2cd62fb3a261d66a549606c131c93 (patch) | |
| tree | 9425508f4c8c4cf68abf529dbd164b8ba2acd296 /Documentation/devicetree/bindings/gpio | |
| parent | 77ac32ad2b03baa7638aadda1650200287ca6f5d (diff) | |
| download | linux-c1cb438522f2cd62fb3a261d66a549606c131c93.tar.xz | |
bindings: update imx and mxs #gpio-cells
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>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt | 5 | ||||
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-mxs.txt | 5 |
2 files changed, 6 insertions, 4 deletions
diff --git a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt index 4363ae4b3c14..5f360e7cdd32 100644 --- a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt +++ b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.txt @@ -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: diff --git a/Documentation/devicetree/bindings/gpio/gpio-mxs.txt b/Documentation/devicetree/bindings/gpio/gpio-mxs.txt index 0c35673f7a3e..1e677a47b836 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-mxs.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-mxs.txt @@ -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: |