apple_smc_sensor_read
if (apple_smc_sensor_read(dev, key, &probe) != 0)
int apple_smc_sensor_read(device_t, const char *, int *);
error = apple_smc_sensor_read(dev, key, &millivalue);
error = apple_smc_sensor_read(dev, sc->sc_temp_sensors[arg2], &val);
error = apple_smc_sensor_read(dev, sc->sc_dts_sensors[arg2], &val);
error = apple_smc_sensor_read(dev, key, &val);
error = apple_smc_sensor_read(dev, "TC0c", &val);
error = apple_smc_sensor_read(dev,