DM_SHARED_CTRL
dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0xc : 0x4);
ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
dm_write_reg(dev, DM_SHARED_CTRL, 0x0);
dm_write_reg(dev, DM_SHARED_CTRL, phy ? 0x1a : 0x12);
ret = dm_read_reg(dev, DM_SHARED_CTRL, &tmp);
dm_write_reg(dev, DM_SHARED_CTRL, 0x0);