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| author | Subrata Banik <subratabanik@google.com> | 2022-09-15 00:17:20 -0700 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2022-09-19 09:50:58 +0000 |
| commit | e8097f7a283228e3bbb8ddc525e4f8c861a5bcb8 (patch) | |
| tree | 4430d4dec6d9c05351cab92aab2177358580c3bb /src/include/program_loading.h | |
| parent | dbe4fe2c8870024c093ee2a23c6d761e838f49c5 (diff) | |
mb/google/rex: Add ELAN6918 touchscreen
ELAN6918 Power Sequencing seems not perfectly matching
with the previous platforms and setting GPP_C06 to high prior
to the power sequencing is actually makes it work.
Ideally Power Sequencing should be as below for ELAN6918 (in ACPI)
`POWER enabled -> RESET deasserted -> Report EN enabled`
But below sequence is only working currently:
`Report EN enabled (ramstage) -> POWER enabled (ACPI) -> RESET
deasserted (ACPI)`
BUG=b:247029304
TEST=Verified ELAN touch panel is working as expected after booting
Google/rex device to ChromeOS.
Change-Id: Ideaeb0faa882b8e603534bbface51ea76923d436
Signed-off-by: Eran Mitrani <mitrani@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66990
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tarun Tuli <taruntuli@google.com>
Diffstat (limited to 'src/include/program_loading.h')
0 files changed, 0 insertions, 0 deletions