mb/google/brya/var/xol: Limit power limits for low/no battery case

Xol has a shutdown issue on our reliability test environment:
- High temperature
- No battery condition

It needs to have margin for the PL2 and PL4 values from the adapter
power, this will limit the PL2/PL4 values up to 30W/40W for xol's
45W power adapter. The new values are confirmed by our power team.

BUG=b:353395811
BRANCH=brya
TEST=built and verified MSR PL2/PL4 values.
     Intel doc #614179 introduces how to check current PL values.

[Original MSR PL1/PL2/PL4 register values for xol]
cd /sys/class/powercap/intel-rapl/intel-rapl\:0/
grep . *power_limit*
  constraint_0_power_limit_uw:18000000 <= MSR PL1 (18W)
  constraint_1_power_limit_uw:55000000 <= MSR PL2 (55W)
  constraint_2_power_limit_uw:114000000 <= MSR PL4 (114W)

[When connected 60W adapter without battery]
Before:
  constraint_0_power_limit_uw:18000000
  constraint_1_power_limit_uw:55000000
  constraint_2_power_limit_uw:60000000
After:
  constraint_0_power_limit_uw:18000000
  constraint_1_power_limit_uw:30000000
  constraint_2_power_limit_uw:40000000

[When connected 45W adapter without battery]
Before:
  constraint_0_power_limit_uw:18000000
  constraint_1_power_limit_uw:45000000
  constraint_2_power_limit_uw:45000000
After:
  constraint_0_power_limit_uw:18000000
  constraint_1_power_limit_uw:30000000
  constraint_2_power_limit_uw:40000000

Change-Id: Ic19119042ffdcc15c72764d8c27bcdce9f229438
Signed-off-by: Seunghwan Kim <sh_.kim@samsung.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83479
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: YH Lin <yueherngl@google.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>

0 files changed, 0 insertions, 0 deletions