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authorOlof Johansson <olof@lixom.net>2011-07-14 22:17:13 -0700
committerGrant Likely <grant.likely@secretlab.ca>2011-07-15 11:51:27 -0600
commiteb5064db408eaffa332f93ddcc19c0b653849093 (patch)
tree08543e8055ba5e9a13c9c961f0c157df2f380584 /Documentation
parent8ff37c38a26dbdba16f07d48c13bf5f212a98c89 (diff)
downloadlinux-eb5064db408eaffa332f93ddcc19c0b653849093.tar.bz2
gpio/tegra: dt: add binding for gpio polarity
Allocate one bit in the available extra cell to indicate if the gpio should be considered logically inverted. Signed-off-by: Olof Johansson <olof@lixom.net> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/gpio/gpio_nvidia.txt3
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt
index 64aac39e6edc..eb4b530d64e1 100644
--- a/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt
@@ -3,5 +3,6 @@ NVIDIA Tegra 2 GPIO controller
Required properties:
- compatible : "nvidia,tegra20-gpio"
- #gpio-cells : Should be two. The first cell is the pin number and the
- second cell is used to specify optional parameters (currently unused).
+ second cell is used to specify optional parameters:
+ - bit 0 specifies polarity (0 for normal, 1 for inverted)
- gpio-controller : Marks the device node as a GPIO controller.