[coreboot-gerrit] Change in coreboot[master]: mb/google/hatch/var/dratini: Add ELAN touchscreen support

[Wisley Chen (Code Review)]

Wisley Chen has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/36125 )

Change subject: mb/google/hatch/var/dratini: Add ELAN touchscreen support
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Patch Set 2:

(1 comment)

https://review.coreboot.org/c/coreboot/+/36125/2/src/mainboard/google/hatch/... 
File src/mainboard/google/hatch/variants/dratini/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/36125/2/src/mainboard/google/hatch/... 
PS2, Line 123: 130
> What is this delay? I don't see it in the datasheet.

in datasheet, from reset to i2c activity need to 300ms.
I feel 300 ms is too long. So, I add stop pin delay to 130 ms and make sure the sequence can
meet elan's FW requirement with elan fw engineer.