From: Olof Johansson <olof@lixom.net>
Date: Fri, 15 Jul 2011 05:17:13 +0000 (-0700)
Subject: gpio/tegra: dt: add binding for gpio polarity
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=eb5064db408eaffa332f93ddcc19c0b653849093;p=openwrt%2Fstaging%2Fblogic.git

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>
---

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.