CG_DPM_VOLTAGE_CNTL
u32 voltage_cntl = RREG32(CG_DPM_VOLTAGE_CNTL);
WREG32(CG_DPM_VOLTAGE_CNTL, voltage_cntl);
WREG32_P(CG_DPM_VOLTAGE_CNTL, DPM_VOLTAGE_EN, ~DPM_VOLTAGE_EN);
WREG32_P(CG_DPM_VOLTAGE_CNTL, 0, ~DPM_VOLTAGE_EN);