PVTPLL_SRC_SEL_PVTPLL
writel_relaxed(PVTPLL_SRC_SEL_PVTPLL, reg_base + RK3506_CLKSEL_CON(15));
writel_relaxed(PVTPLL_SRC_SEL_PVTPLL, reg_base + RV1126B_CORECLKSEL_CON(0));
writel_relaxed(PVTPLL_SRC_SEL_PVTPLL, reg_base + RV1126B_NPUCLKSEL_CON(0));
writel_relaxed(PVTPLL_SRC_SEL_PVTPLL, reg_base + RV1126B_VICLKSEL_CON(0));
writel_relaxed(PVTPLL_SRC_SEL_PVTPLL, reg_base + RV1126B_VEPUCLKSEL_CON(0));
writel_relaxed(PVTPLL_SRC_SEL_PVTPLL, reg_base + RV1126B_VCPCLKSEL_CON(0));