int (*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios);
int (*execute_tuning)(struct mmc_host *host);
void (*enable_preset_value)(struct mmc_host *host, bool enable);
+ int (*select_drive_strength)(unsigned int max_dtr, int host_drv, int card_drv);
};
struct mmc_card;