On 05/18/2018 10:48 AM, Hans de Goede wrote:

Could it be the i2c input clock definition in drivers/mfd/intel-lpss-pci.c
is also wrong for Apollo Lake (N3450) ?  There are lots of people having
various issues with i2c attached touchpads on Apollo Lake devices, this 
bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1728244

Is sort of a collection bug for these. Various models laptops, lots of
reporters. Note not sure thie is an i2c-designware issue, but it would
be good to double check the input clock on Apollo Lake.

Does i2c_designware_core.dyndbg=+p and i2c-hid.debug=1 command line 
arguments give any useful debug information from those machines?

-- 
Jarkko