diff options
| author | Weiyi Lu <weiyi.lu@mediatek.com> | 2020-06-19 15:28:55 +0800 |
|---|---|---|
| committer | Hung-Te Lin <hungte@chromium.org> | 2020-10-08 11:58:42 +0000 |
| commit | 86b3bf10e60c137b01b81a37ce9827757f6af42d (patch) | |
| tree | ea5e759fc4615a2629fac4c85503510c77b63cd0 /src/soc/mediatek/mt8192 | |
| parent | 83b33f62cf7b125b524b2fbdea5bd8317be0c154 (diff) | |
soc/mediatek: Add function to raise the CPU frequency of MT8192
Rename all mt_pll_raise_ca53_freq() into mt_pll_raise_little_cpu_freq().
Implement mt_pll_raise_little_cpu_freq() in MT8192.
Signed-off-by: Weiyi Lu <weiyi.lu@mediatek.com>
Change-Id: I97d9a61f39f2eb27f0c6f911a9199bf0eaae4fbe
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45401
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Diffstat (limited to 'src/soc/mediatek/mt8192')
| -rw-r--r-- | src/soc/mediatek/mt8192/include/soc/pll.h | 1 | ||||
| -rw-r--r-- | src/soc/mediatek/mt8192/pll.c | 25 |
2 files changed, 26 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8192/include/soc/pll.h b/src/soc/mediatek/mt8192/include/soc/pll.h index 442aa30877..43c2528994 100644 --- a/src/soc/mediatek/mt8192/include/soc/pll.h +++ b/src/soc/mediatek/mt8192/include/soc/pll.h @@ -249,6 +249,7 @@ enum { MCU_MUX_MASK = 0x3 << 9, MCU_MUX_SRC_PLL = 0x1 << 9, + MCU_MUX_SRC_DIV_PLL1 = 0x2 << 9, }; enum { diff --git a/src/soc/mediatek/mt8192/pll.c b/src/soc/mediatek/mt8192/pll.c index 40d92fdc63..e8849df0b0 100644 --- a/src/soc/mediatek/mt8192/pll.c +++ b/src/soc/mediatek/mt8192/pll.c @@ -434,3 +434,28 @@ void mt_pll_init(void) /* enable [14] dramc_pll104m_ck */ setbits32(&mtk_topckgen->clk_misc_cfg_0, 1 << 14); } + +void mt_pll_raise_little_cpu_freq(u32 freq) +{ + /* enable [4] intermediate clock armpll_divider_pll1_ck */ + setbits32(&mtk_topckgen->clk_misc_cfg_0, 1 << 4); + + /* switch ca55 clock source to intermediate clock */ + clrsetbits32(&mt8192_mcucfg->cpu_plldiv_cfg0, MCU_MUX_MASK, MCU_MUX_SRC_DIV_PLL1); + + /* disable armpll_ll frequency output */ + clrbits32(plls[APMIXED_ARMPLL_LL].reg, PLL_EN); + + /* raise armpll_ll frequency */ + pll_set_rate(&plls[APMIXED_ARMPLL_LL], freq); + + /* enable armpll_ll frequency output */ + setbits32(plls[APMIXED_ARMPLL_LL].reg, PLL_EN); + udelay(PLL_EN_DELAY); + + /* switch ca55 clock source back to armpll_ll */ + clrsetbits32(&mt8192_mcucfg->cpu_plldiv_cfg0, MCU_MUX_MASK, MCU_MUX_SRC_PLL); + + /* disable [4] intermediate clock armpll_divider_pll1_ck */ + clrbits32(&mtk_topckgen->clk_misc_cfg_0, 1 << 4); +} |