On Mon, 2015-06-08 at 17:37 +0300, 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 breaks the touchscreen on my Onda v975w:
[  239.732858] Goodix-TS i2c-GDIX1001:00: ID 9271, version: 1020
[  239.732977] Goodix-TS i2c-GDIX1001:00: Failed to get reset GPIO: -16
[  239.736071] Goodix-TS: probe of i2c-GDIX1001:00 failed with error -16

This is the DSDT for that device:
https://bugzilla.kernel.org/attachment.cgi?id=149331