input: atmel_mxt_ts: Send calibrate command during resume
Touch controller might freeze because of bugs in firmware,
water drops on the panel or other extreme environmental
conditions. In such cases, recover touch by sending
calibrate command during resume.
Change-Id: I821e984fb035e4997ee1bfc78ce7c912f9a08c94
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/input/touchscreen/atmel-mxt-ts.txt b/Documentation/devicetree/bindings/input/touchscreen/atmel-mxt-ts.txt
index a6c83d0..88fca69 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/atmel-mxt-ts.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/atmel-mxt-ts.txt
@@ -27,6 +27,8 @@
- vcc_i2c-supply : Power source required to pull up i2c bus
- atmel,dig-reg-support : specify to indicate digital regulator is
needed
+ - atmel,need-calibration : specify to indicate whether calibration is
+ needed during wakeup.
Example:
i2c@f9966000 {