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mb/google/skywalker: Turn off UFS power for eMMC SKUs

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On MT8189, UFS power is enabled by default. For SKUs that use eMMC for
storage and do not need UFS, it is necessary to disable UFS power;
otherwise, the system will fail to suspend properly. Disabling UFS
power in these cases both saves power and ensures correct suspend
functionality.

BUG=b:430421429
BRANCH=skywalker
TEST=Suspend flow works correctly, and SoC power consumption is 34 mW,
     meeting expectations on Anakin.

Signed-off-by: Vince Liu <vince-wl.liu@mediatek.corp-partner.google.com>
Change-Id: Ie932a939f663e159e098fd13c7e26e9a2089e7bd
Reviewed-on: https://review.coreboot.org/c/coreboot/+/88977
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Vince Liu 2025-08-27 15:31:50 +08:00 • committed by Yu-Ping Wu
commit 7896f4950c
1 changed files with 3 additions and 1 deletions
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4
src/mainboard/google/skywalker/mainboard.c
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@ -88,8 +88,10 @@ enum mtk_storage_type mainboard_get_storage_type(void)
static void mainboard_init(struct device *dev)
{
if (mainboard_get_storage_type() == STORAGE_EMMC)
if (mainboard_get_storage_type() == STORAGE_EMMC) {
mtk_msdc_configure_emmc(true);
mtcmos_ufs_power_off();
}
dpm_init();
setup_usb_host();