Matt DeVillier has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/37915 )
Change subject: mb/google/peppy: add _DSD to touchscreen ACPI ......................................................................
mb/google/peppy: add _DSD to touchscreen ACPI
Recent changes to the Atmel touchscreen driver in the mainline kernel broke functionality with devices running upstream coreboot, due relying on another driver (chromeos_laptop) which makes the assumption that the i2c devices are be in PCI mode (as with the stock Google firmware) rather than in ACPI mode as they are in upstream coreboot.
Mitigate this by adding the required devicetree property so the Atmel toushcreen driver will correctly attach without the use of chromeos_laptop.
Test: build/boot peppy on 4.18+ kernel, verify touchscreen working
Change-Id: I05df8367886eef55b409590f75a68d98d4e5fbdf Signed-off-by: Matt DeVillier matt.devillier@gmail.com --- M src/mainboard/google/slippy/variants/peppy/include/variant/acpi/mainboard.asl 1 file changed, 7 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/15/37915/1
diff --git a/src/mainboard/google/slippy/variants/peppy/include/variant/acpi/mainboard.asl b/src/mainboard/google/slippy/variants/peppy/include/variant/acpi/mainboard.asl index cc3e063..4c930de 100644 --- a/src/mainboard/google/slippy/variants/peppy/include/variant/acpi/mainboard.asl +++ b/src/mainboard/google/slippy/variants/peppy/include/variant/acpi/mainboard.asl @@ -140,6 +140,13 @@ } }
+ Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package () {"compatible", "atmel,maxtouch"}, + } + }) + Method (_STA) { If (LEqual (\S2EN, 1)) {