REG_LINK_DRV
it6505_set_bits(it6505, REG_LINK_DRV, DRV_HS,
it6505_set_bits(it6505, REG_LINK_DRV, 0xF1,
it6505_set_bits(it6505, REG_LINK_DRV, 0xF0, 0x00);