On Thu, 2015-11-19 at 14:26 +0200, Irina Tirdea wrote:

After power on, it is recommended that the driver resets the device.
The reset procedure timing is described in the datasheet and is used
at device init (before writing device configuration) and
for power management. It is a sequence of setting the interrupt
and reset pins high/low at specific timing intervals. This procedure
also includes setting the slave address to the one specified in the
ACPI/device tree.

This fails on a 4.3 kernel with an ACPI device (WinBook TW100):
Goodix-TS: probe of i2c-GDIX1001:00 failed with error -16

Can you please document which upstream commit is necessary to make this
behave properly?

I'll test again with a newer kernel.

Cheers