hi846_write_reg
ret = hi846_write_reg(hi846, HI846_REG_ISP,
return hi846_write_reg(hi846, HI846_REG_TEST_PATTERN, pattern);
ret = hi846_write_reg(hi846, HI846_REG_ANALOG_GAIN, ctrl->val);
ret = hi846_write_reg(hi846, HI846_REG_MODE_SELECT,
if (hi846_write_reg(hi846, HI846_REG_MODE_SELECT, HI846_MODE_STANDBY))