mmc_set_timing
err = mmc_set_timing(periph, start_ccb, bus_timing_hs);
static int mmc_set_timing(struct mmc_softc *sc, struct mmc_ivars *ivar,
if (mmc_set_timing(sc, ivar, timing) != MMC_ERR_NONE) {
err = mmc_set_timing(sc, ivar, bus_timing_hs);
err = mmc_set_timing(sc, ivar, max_timing);
err = mmc_set_timing(sc, ivar, bus_timing_mmc_ddr52);
err = mmc_set_timing(sc, ivar, bus_timing_mmc_hs200);