CRD4
viafb_write_reg_mask(CRD4, VIACR, 0, BIT1);
viafb_write_reg_mask(CRD4, VIACR, 0x02, BIT1);
{VIACR, CRD4, 0xFF, 0x81}, /* Second power sequence control */
{VIACR, CRD4, 0xFF, 0x81}, /* Second power sequence control */