Nicolas Boichat d9f4ce13f2 touchpad_elan: Add retry logic if the touchpad does not respond ...

After 3 tries, the touchpad is reset by power-cycling it.

BRANCH=none
BUG=b:71688150
TEST=Short SDA/SCL lines, press on touchpad, see that touchpad tasks
     retries transaction, and then resets the touchpad power.
TEST=Do ESD discharge, and see that touchpad always recovers.

Change-Id: If0b5eb936d4d2feb3d34a7ec8748869a1b915c34
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/872131
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>

2018-01-21 22:20:48 -08:00

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