CH7006_POV
regs[CH7006_POV] = bitf(CH7006_POV_START_ACTIVE_8, start_active);
ch7006_load_reg(client, state, CH7006_POV);
ch7006_load_reg(client, state, CH7006_POV);
setbitf(state, CH7006_POV, HPOS_8, hpos);
setbitf(state, CH7006_POV, VPOS_8, vpos);
ch7006_load_reg(client, state, CH7006_POV);
ch7006_save_reg(client, state, CH7006_POV);