[lkml]   [2015]   [Jun]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v2 4/8] input: goodix: reset device at init
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:

 \ /
  Last update: 2015-06-09 18:21    [W:0.174 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site