staging: iio: light: iqs253: Fine tune settings

- Channel 0 to be used for stylus detection
- Channel 1 and 2 to be used for proximity detection
- Channel 0 should detect proximity at 0.5 cm
- Channel 1 and 2 should detect proximity at 2 cm
- SAR gpio to be pulled high on proximity detection else high

Change-Id: I5a706583a9bace6b740f319cf7264db79857993c
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Reviewed-on: http://git-master/r/364277
(cherry picked from commit 0dac45f0d954c8d134fd0204f8f7c9999d98dd9f)
Reviewed-on: http://git-master/r/368240
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Sachin Nikam <snikam@nvidia.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/staging/iio/light/iqs253-ps.txt b/Documentation/devicetree/bindings/staging/iio/light/iqs253-ps.txt
index 7c536efeb995..1dab27d73dfc 100644
--- a/Documentation/devicetree/bindings/staging/iio/light/iqs253-ps.txt
+++ b/Documentation/devicetree/bindings/staging/iio/light/iqs253-ps.txt
@@ -9,6 +9,7 @@ Required properties:
 - proximity,power-consumed: rough estimate of this sensor's power consumption in mA.
 - rdy-gpio: gpio to be used for i2c handshake with the sensor.
 - wake-gpio: gpio to be used for wakeup on stylus insert/removal event.
+- sar-gpio: gpio to be used for sending proximity event to SAR sensor.
 
 Example:
 
@@ -21,4 +22,5 @@ Example:
 		proximity,power-consumed = "1.67"; /* mA */
 		rdy-gpio = <&gpio TEGRA_GPIO(PK, 5) 1>;
 		wake-gpio = <&gpio TEGRA_GPIO(PW, 3) 1>;
+		sar-gpio = <&gpio TEGRA_GPIO(I, 2) 1>;
 	};