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google/butterfly: add cpu/gpu pwm backlight register values 

Required for functional internal display on butterfly using libgfxinit.

Test: boot/build butterfly, verify internal display functional
prior to OS driver loading.

Change-Id: Ib8060f2d1ad0694f0886d35c83763907f61b47b1
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/30819
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Matt DeVillier 2019-01-10 12:51:56 -06:00
parent c2c1dc9c76
commit e2c4a3518e
1 changed files with 4 additions and 0 deletions
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4
src/mainboard/google/butterfly/devicetree.cb
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@ -15,6 +15,10 @@ chip northbridge/intel/sandybridge
register "gpu_panel_power_backlight_on_delay" = "2100" # T3: 210ms
register "gpu_panel_power_backlight_off_delay" = "2100" # T4: 210ms
# Set backlight PWM values
register "gpu_cpu_backlight" = "0x000001e8"
register "gpu_pch_backlight" = "0x03d00000"
register "max_mem_clock_mhz" = "666" # DDR3-1333
device cpu_cluster 0 on