diff options
Diffstat (limited to 'src/soc/mediatek/mt8192/pll.c')
-rw-r--r-- | src/soc/mediatek/mt8192/pll.c | 25 |
1 files changed, 25 insertions, 0 deletions
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); +} |