SG_DIG_CTRL
u32 sg_dig_ctrl = tr32(SG_DIG_CTRL);
tw32(SG_DIG_CTRL, sg_dig_ctrl);
sg_dig_ctrl = tr32(SG_DIG_CTRL);
tw32_f(SG_DIG_CTRL, SG_DIG_COMMON_SETUP);
tw32_f(SG_DIG_CTRL, expected_sg_dig_ctrl | SG_DIG_SOFT_RESET);
tw32_f(SG_DIG_CTRL, expected_sg_dig_ctrl);
tw32_f(SG_DIG_CTRL, SG_DIG_COMMON_SETUP);