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 configure 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 <huayang.duan@mediatek.com> Change-Id: Ieb4e6cbf19da53d653872b166d3191c7b010dca6 Reviewed-on: https://review.coreboot.org/c/coreboot/+/44702 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Hung-Te Lin <hungte@chromium.org> Reviewed-by: Frans Hendriks <fhendriks@eltan.com> |
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