[coreboot-gerrit] Change in coreboot[master]: soc/mediatek/mt8192: Do memory pll init before calibration

[Xi Chen (Code Review)]

Xi Chen has uploaded a new patch set (#52) to the change originally created by CK HU. ( https://review.coreboot.org/c/coreboot/+/44702 )

Change subject: soc/mediatek/mt8192: Do memory pll init before calibration
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soc/mediatek/mt8192: Do memory pll init before calibration

Memory PLL is used to provide the basic clock for dram controller
and DDRPHY, PLL must be initialized as predefined way.
  First, enable PLL POWER and ISO, wait at least 30us, release ISO, then
config PLL frequency and enable PLL master switch.
  At last, enable control ability for SPM to switch between active and
idle when system is switched between normal and low power mode.

TEST=Confirm Memory PLL frequency is right by frequency meter

Signed-off-by: Huayang Duan 
Change-Id: Ieb4e6cbf19da53d653872b166d3191c7b010dca6
---
M src/soc/mediatek/common/include/soc/pll_common.h
M src/soc/mediatek/mt8192/dramc_pi_main.c
M src/soc/mediatek/mt8192/include/soc/pll.h
3 files changed, 40 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/02/44702/52