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authorMatt DeVillier <matt.devillier@gmail.com>2022-12-21 12:15:21 -0600
committerFelix Singer <felixsinger@posteo.net>2023-01-09 21:10:10 +0000
commit3d5475d66c74bf57f8c92c45ed0f9c9208681f2e (patch)
tree75f80d0515edb0313a22a71264ccd276cd71d831 /LICENSES/GPL-2.0-only.txt
parentaf6029ba1a4b22c1f3fa4e1edbfa07c974f390df (diff)
mb/google/dedede: Implement touchscreen power sequencing
For touchscreens on dedede variants, drive the enable GPIO high starting in romstage, then disable the reset GPIO in ramstage. This will allow coreboot to detect the presence of i2c touchscreens during ACPI SSDT generation (implemented in a subsequent commit). Since the fast majority of dedede variants have a touchscreen option, and those that do use the same GPIOs for enable/reset, set the GPIOs for touchscreen operation in the baseboard and then override for the few (3) variants that do not have a touchscreen. BUG=b:121309055 TEST=tested with rest of patch train Change-Id: Ib95e23545cc3e8589ddbd9e18cd0533bec9333e0 Signed-off-by: Matt DeVillier <matt.devillier@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/71187 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Singer <felixsinger@posteo.net>
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