25.09.2020 16:52, Jiada Wang пишет:

According to datasheet, mXT1386 chip has a WAKE line, it is used
to wake the chip up from deep sleep mode before communicating with
it via the I2C-compatible interface.

if the WAKE line is connected to a GPIO line, the line must be
asserted 25 ms before the host attempts to communicate with the mXT1386.
If the WAKE line is connected to the SCL pin, the mXT1386 will send a
NACK on the first attempt to address it, the host must then retry 25 ms
later.

This patch adds compatible string "atmel,mXT1386" for mXT1386 controller,
when I2C transfer on mXT1386 fails, retry the transfer once after a 25 ms
sleep.

Signed-off-by: Jiada Wang <redacted>
---
 drivers/input/touchscreen/atmel_mxt_ts.c | 62 +++++++++++++++++++-----
 1 file changed, 50 insertions(+), 12 deletions(-)

Hello, Jiada! Thank you very much!

Will be nice if this patch could land to v5.10 :)

Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>