diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 9f9a4c6..0f83858 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -148,6 +148,7 @@
 	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;