tree a986b9719009afb7067af0175991328549452b00
parent ad0288a843ab65f2a567cf6095c129e2ca8e8476
author Sen Chu <sen.chu@mediatek.corp-partner.google.com> 1662376788 +0800
committer Felix Held <felix-coreboot@felixheld.de> 1662720223 +0000

soc/mediatek/mt8186: Enable CPU power hardware tracking for PMIC MT6366

1. There are two power sources for CPU:
   - Logic power (VPROC).
   - SRAM power (VSRAM_PROC).
2. There is a constraint between VPROC and VSRAM_PROC:
   - 0mV <= VSRAM_PROC - VPROC <= 250mV.

With software control, the constraint might not always hold. Therefore,
we enable hardware tracking from PMIC MT6366 to ensure the constraint
is met automatically.

BUG=b:236353282, b:241615706
TEST=meet the constrain correctly when adjusting the voltage.

Signed-off-by: Sen Chu <sen.chu@mediatek.corp-partner.google.com>
Change-Id: I6012c57e60c009f1d599b57aab1c2526ee789208
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67436
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>