[PATCH 1/2] dt-bindings: i2c: tegra: Add SMBus feature properties

[Akhil R]

Tegra I2C can use a gpio as an smbus-alert. Document the usage of
the same.

Signed-off-by: Akhil R <akhilrajeev at nvidia.com>
---
 Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt
index 3f2f990..71ee79b 100644
--- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt
+++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.txt
@@ -70,6 +70,10 @@ Required properties:
   - rx
   - tx
 
+optional properties:
+- smbalert-gpio: Must contain an entry for the gpio to be used as smbus alert.
+  It will be used only if optional smbus-alert property is present.
+
 Example:
 
 	i2c at 7000c000 {
-- 
2.7.4