[coreboot-gerrit] Change in coreboot[master]: mb/google/guybrush/var/dewatt: Add Elan touchscreen

[Kenneth Chan (Code Review)]

Attention is currently required from: Paul Menzel, Ren Kuo, Rob Barnes, Karthik Ramasubramanian, Karthikeyan Ramasubramanian.
Kenneth Chan has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59975 )

Change subject: mb/google/guybrush/var/dewatt: Add Elan touchscreen
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Patch Set 8:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/59975/comment/d2f0fc4a_1a94c5b2 
PS6, Line 9: Add Elan 6918 touchscreen for dewatt.
> Please mention the datasheet name and revision, you got the values from.

Done

https://review.coreboot.org/c/coreboot/+/59975/comment/8bd711a3_390acb81 
PS6, Line 12: touchscree
> touchscreen

Done

File src/mainboard/google/guybrush/variants/dewatt/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/59975/comment/9a9104ce_cdfb5156 
PS2, Line 67: register "generic.stop_delay_ms" = "280"
> Long resume time is not OK. Please measure resume time impact of this touchscreen. […]

After discussing to [e-mail] , removed stop_delay_ms and tested with elan 6918.