ccs_read_addr
rval = ccs_read_addr(sensor, SMIAPP_REG_U8_MANUFACTURER_ID,
rval = ccs_read_addr(sensor, SMIAPP_REG_U8_SMIA_VERSION,
rval = ccs_read_addr(sensor, SMIAPP_REG_U8_SMIAPP_VERSION,
int ccs_read_addr(struct ccs_sensor *sensor, u32 reg, u32 *val);
ccs_read_addr(sensor, CCS_R_##reg_name, val)