REDUCED_POWER_SCLK_HILEN
dyn_pwrmgt_sclk_length &= ~REDUCED_POWER_SCLK_HILEN(0xf);
dyn_pwrmgt_sclk_length |= REDUCED_POWER_SCLK_HILEN(2);
dyn_pwrmgt_sclk_length |= REDUCED_POWER_SCLK_HILEN(4);
dyn_pwrmgt_sclk_length |= REDUCED_POWER_SCLK_HILEN(1);