diff options
| author | Chun-Jie Chen <chun-jie.chen@mediatek.corp-partner.google.com> | 2021-08-13 09:23:25 +0800 |
|---|---|---|
| committer | Hung-Te Lin <hungte@chromium.org> | 2021-08-23 06:04:02 +0000 |
| commit | e1028d5ee3255fa0b2ff17d27730fee732885cb9 (patch) | |
| tree | 10caef523eb19275658857fc2aae0fcfddb27e86 /src | |
| parent | 8316db207d9e3fb55f51cb6bce642549d9364ff0 (diff) | |
soc/mediatek/mt8195: Update clock square setting
To reduce suspend power consumption,
1. Disable unused CLKSQ2.
2. Set CLKSQ_EN to sleep control for SPM 26M sleep control.
No bus clock when enter 26m sleep control, and only control
clock square by side band.
Signed-off-by: Chun-Jie Chen <chun-jie.chen@mediatek.com>
Change-Id: Ia9a1735d6f508ce35b9af2d67831a3474255198b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57043
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/mediatek/mt8195/pll.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/soc/mediatek/mt8195/pll.c b/src/soc/mediatek/mt8195/pll.c index ebdc37f362..74dd1509f3 100644 --- a/src/soc/mediatek/mt8195/pll.c +++ b/src/soc/mediatek/mt8195/pll.c @@ -638,12 +638,18 @@ void mt_pll_init(void) int i; /* enable clock square */ - setbits32(&mtk_apmixed->ap_pll_con0, 0x4); + setbits32(&mtk_apmixed->ap_pll_con0, BIT(2)); udelay(PLL_CKSQ_ON_DELAY); /* enable clock square1 low-pass filter */ - setbits32(&mtk_apmixed->ap_pll_con0, 0x2); + setbits32(&mtk_apmixed->ap_pll_con0, BIT(1)); + + /* + * BIT(3): 1 for register control; 0 for sleep control + * BIT(8): 1 to enable clock square2; 0 to disable it + */ + clrbits32(&mtk_apmixed->ap_pll_con0, BIT(3) | BIT(8)); /* xPLL PWR ON */ for (i = 0; i < APMIXED_PLL_MAX; i++) |