diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
index 57df3eb..1b3e6b3 100644
--- a/drivers/mmc/host/dw_mmc-pltfm.c
+++ b/drivers/mmc/host/dw_mmc-pltfm.c
@@ -23,7 +23,8 @@
 
 #include "dw_mmc.h"
 
-int dw_mci_pltfm_register(struct platform_device *pdev)
+int dw_mci_pltfm_register(struct platform_device *pdev,
+				struct dw_mci_drv_data *drv_data)
 {
 	struct dw_mci *host;
 	struct resource	*regs;
@@ -41,6 +42,7 @@ int dw_mci_pltfm_register(struct platform_device *pdev)
 	if (host->irq < 0)
 		return host->irq;
 
+	host->drv_data = drv_data;
 	host->dev = &pdev->dev;
 	host->irq_flags = 0;
 	host->pdata = pdev->dev.platform_data;
@@ -48,6 +50,12 @@ int dw_mci_pltfm_register(struct platform_device *pdev)
 	if (!host->regs)
 		return -ENOMEM;
 
+	if (host->drv_data->init) {
+		ret = host->drv_data->init(host);
+		if (ret)
+			return ret;
+	}
+
 	platform_set_drvdata(pdev, host);
 	ret = dw_mci_probe(host);
 	return ret;
@@ -56,7 +64,7 @@ EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
 
 static int dw_mci_pltfm_probe(struct platform_device *pdev)
 {
-	return dw_mci_pltfm_register(pdev);
+	return dw_mci_pltfm_register(pdev, NULL);
 }
 
 int __exit dw_mci_pltfm_remove(struct platform_device *pdev)
diff --git a/drivers/mmc/host/dw_mmc-pltfm.h b/drivers/mmc/host/dw_mmc-pltfm.h
index 5618608..f226c21 100644
--- a/drivers/mmc/host/dw_mmc-pltfm.h
+++ b/drivers/mmc/host/dw_mmc-pltfm.h
@@ -12,7 +12,8 @@
 #ifndef _DW_MMC_PLTFM_H_
 #define _DW_MMC_PLTFM_H_
 
-extern int dw_mci_pltfm_register(struct platform_device *pdev);
+extern int dw_mci_pltfm_register(struct platform_device *pdev,
+				struct dw_mci_drv_data *drv_data);
 extern int __exit dw_mci_pltfm_remove(struct platform_device *pdev);
 extern const struct dev_pm_ops dw_mci_pltfm_pmops;
 
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index b8ec067..bd51050 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -231,6 +231,7 @@ static void dw_mci_set_timeout(struct dw_mci *host)
 static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct mmc_data	*data;
+	struct dw_mci_slot *slot = mmc_priv(mmc);
 	u32 cmdr;
 	cmd->error = -EINPROGRESS;
 
@@ -260,6 +261,9 @@ static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd)
 			cmdr |= SDMMC_CMD_DAT_WR;
 	}
 
+	if (slot->host->drv_data->prepare_command)
+		slot->host->drv_data->prepare_command(slot->host, &cmdr);
+
 	return cmdr;
 }
 
@@ -812,6 +816,9 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		slot->clock = ios->clock;
 	}
 
+	if (slot->host->drv_data->set_ios)
+		slot->host->drv_data->set_ios(slot->host, ios);
+
 	switch (ios->power_mode) {
 	case MMC_POWER_UP:
 		set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags);
@@ -1813,6 +1820,7 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 {
 	struct mmc_host *mmc;
 	struct dw_mci_slot *slot;
+	int ctrl_id, ret;
 	u8 bus_width;
 
 	mmc = mmc_alloc_host(sizeof(struct dw_mci_slot), host->dev);
@@ -1844,6 +1852,14 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	if (host->pdata->caps)
 		mmc->caps = host->pdata->caps;
 
+	if (host->dev->of_node) {
+		ctrl_id = of_alias_get_id(host->dev->of_node, "mshc");
+		if (ctrl_id < 0)
+			ctrl_id = 0;
+	}
+	if (host->drv_data && host->drv_data->caps)
+		mmc->caps |= host->drv_data->caps[ctrl_id];
+
 	if (host->pdata->caps2)
 		mmc->caps2 = host->pdata->caps2;
 
@@ -1854,6 +1870,14 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	else
 		bus_width = 1;
 
+	if (host->drv_data->setup_bus) {
+		struct device_node *slot_np;
+		slot_np = dw_mci_of_find_slot_node(host->dev, slot->id);
+		ret = host->drv_data->setup_bus(host, slot_np, bus_width);
+		if (ret)
+			goto err_setup_bus;
+	}
+
 	switch (bus_width) {
 	case 8:
 		mmc->caps |= MMC_CAP_8_BIT_DATA;
@@ -1920,6 +1944,10 @@ static int __init dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	queue_work(host->card_workqueue, &host->card_work);
 
 	return 0;
+
+err_setup_bus:
+	mmc_free_host(mmc);
+	return -EINVAL;
 }
 
 static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id)
@@ -2014,7 +2042,7 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
 	struct dw_mci_board *pdata;
 	struct device *dev = host->dev;
 	struct device_node *np = dev->of_node;
-	int idx;
+	int idx, ret;
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata) {
@@ -2041,6 +2069,12 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
 
 	of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms);
 
+	if (host->drv_data->parse_dt) {
+		ret = host->drv_data->parse_dt(host);
+		if (ret)
+			return ERR_PTR(ret);
+	}
+
 	return pdata;
 }
 
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 15c27e1..a9f045a 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -182,4 +182,26 @@ extern int dw_mci_suspend(struct dw_mci *host);
 extern int dw_mci_resume(struct dw_mci *host);
 #endif
 
+/**
+ * dw_mci driver data - dw-mshc implementation specific driver data.
+ * @caps: mmc subsystem specified capabilities of the controller(s).
+ * @init: early implementation specific initialization.
+ * @prepare_command: handle CMD register extensions.
+ * @set_ios: handle bus specific extensions.
+ * @parse_dt: parse implementation specific device tree properties.
+ * @setup_bus: initialize io-interface
+ *
+ * Provide controller implementation specific extensions. The usage of this
+ * data structure is fully optional and usage of each member in this structure
+ * is optional as well.
+ */
+struct dw_mci_drv_data {
+	unsigned long	*caps;
+	int		(*init)(struct dw_mci *host);
+	void		(*prepare_command)(struct dw_mci *host, u32 *cmdr);
+	void		(*set_ios)(struct dw_mci *host, struct mmc_ios *ios);
+	int		(*parse_dt)(struct dw_mci *host);
+	int		(*setup_bus)(struct dw_mci *host,
+				struct device_node *slot_np, u8 bus_width);
+};
 #endif /* _DW_MMC_H_ */
diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
index b72e4aa..6cb043e 100644
--- a/include/linux/mmc/dw_mmc.h
+++ b/include/linux/mmc/dw_mmc.h
@@ -78,6 +78,8 @@ struct mmc_data;
  * @data_offset: Set the offset of DATA register according to VERID.
  * @dev: Device associated with the MMC controller.
  * @pdata: Platform data associated with the MMC controller.
+ * @drv_data: Driver specific data for identified variant of the controller
+ * @priv: Implementation defined private data.
  * @biu_clk: Pointer to bus interface unit clock instance.
  * @ciu_clk: Pointer to card interface unit clock instance.
  * @slot: Slots sharing this MMC controller.
@@ -160,6 +162,8 @@ struct dw_mci {
 	u16			data_offset;
 	struct device		*dev;
 	struct dw_mci_board	*pdata;
+	struct dw_mci_drv_data	*drv_data;
+	void			*priv;
 	struct clk		*biu_clk;
 	struct clk		*ciu_clk;
 	struct dw_mci_slot	*slot[MAX_MCI_SLOTS];
