apple_smc_read_key_1
int apple_smc_read_key_1(struct apple_smc_tag *,
error = apple_smc_read_key_1(asa->asa_smc, nfans_key, &nfans);
error = apple_smc_read_key_1(sc->sc_smc, nfans_key, &sc->sc_nfans);