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soc/mediatek/mt8196: Add DVFS support for the second SoC SKU

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Devices utilizing the second SKU of the SoC experience system hangs due
to missing DVFS support. This patch adds DVFS support for the second
SKU to resolve this issue.

BRANCH=rauru
BUG=b:443664123
TEST=verify booting on both original and second SoC SKUs

Change-Id: If17ecd4a8358e08a45c4662bb92138b7a939512e
Signed-off-by: Jason Chen <jason-ch.chen@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/89405
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: jason-ch chen <Jason-ch.Chen@mediatek.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Jason Chen 2025-10-03 09:16:36 +08:00 • committed by Yidi Lin
commit 386feb720e
1 changed files with 5 additions and 1 deletions
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6
src/soc/mediatek/mt8196/dvfs.c
View file

@ -7,8 +7,12 @@
void dvfs_init(void)
{
uint32_t val;
uint32_t seg = read32p(EFUSEC_BASE + 0x50);
val = BIT(8) | BIT(0);
if (seg == 0x14)
val = BIT(9) | BIT(0);
else
val = BIT(8) | BIT(0);
write32p(CSRAM_BASE + 0x8, 0x55AA55AA);
write32p(CSRAM_BASE + 0xC, val);