--- zzzz-none-000/linux-4.4.60/drivers/mmc/host/sdhci.h	2017-04-08 07:53:53.000000000 +0000
+++ dragonfly-4020-701/linux-4.4.60/drivers/mmc/host/sdhci.h	2018-11-08 13:36:17.000000000 +0000
@@ -553,6 +553,7 @@
 					 struct mmc_card *card,
 					 unsigned int max_dtr, int host_drv,
 					 int card_drv, int *drv_type);
+	void	(*toggle_cdr)(struct sdhci_host *host, bool enable);
 };
 
 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS