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soc/mediatek/mt8196: Disable HWRot's clocks

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HWRot (Hardware Root of trust) is not used, so we disable its clocks to
save power. This patch is a subitem of Vcore power consumption
improvement. The whole work improves SoC power consumption from 120mW to
90mW in suspend.

BRANCH=rauru
BUG=b:377628718
TEST=Bootup OK & Suspend/Resume passed

Signed-off-by: Guangjie Song <guangjie.song@mediatek.com>
Change-Id: I25e607e8e8b2d52608d279e1862f423ca50aab6a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86553
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Guangjie Song 2025-02-10 19:24:38 +08:00 • committed by Yidi Lin
commit 024a23e478
1 changed files with 2 additions and 2 deletions
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4
src/soc/mediatek/mt8196/pll.c
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@ -1628,14 +1628,14 @@ void mt_pll_post_init(void)
write32(&mtk_topckgen->clk_cfg[12].set, 0x80800000);
write32(&mtk_topckgen->clk_cfg[15].set, 0x8000);
write32(&mtk_topckgen->clk_cfg[16].set, 0x800000);
write32(&mtk_topckgen->clk_cfg[18].set, 0x80000000);
write32(&mtk_topckgen->clk_cfg[18].set, 0x80800000);
write32(&mtk_topckgen->clk_cfg[19].set, 0x80808000);
write32(&mtk_topckgen->clk_cfg[20].set, 0x80808080);
write32(&mtk_topckgen->clk_cfg[21].set, 0x80808080);
write32(&mtk_topckgen->clk_cfg[22].set, 0x80);
write32(&mtk_vlpsys->vlp_clk_cfg[6].set, 0x80);
write32(&mtk_vlpsys->vlp_clk_cfg[10].set, 0x80800000);
write32(&mtk_vlpsys->vlp_clk_cfg[10].set, 0x80808000);
write32(&mtk_vlpsys->vlp_clk_cfg[11].set, 0x80);
write32(&mtk_topckgen2->cksys2_clk_cfg[0].set, 0x80808080);