apple_smc_register_sensor_tree
apple_smc_register_sensor_tree(sysctlctx, dev, "voltage",
apple_smc_register_sensor_tree(sysctlctx, dev, "current",
apple_smc_register_sensor_tree(sysctlctx, dev, "power",
apple_smc_register_sensor_tree(sysctlctx, dev, "ambient",