Merge tag 'mmc-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Convert to sysfs_emit() in favor of sprintf()

   - Improve fallback to speed modes if eMMC HS200 fails

  MMC host:
   - dw_mmc: Allow variants to set minimal supported clock rate

   - dw-mmc-rockchip: Fix problems with invalid clock rates

   - litex_mmc: Add new DT based driver for the LiteX's LiteSDCard
     interface

   - litex_mmc: Add Gabriel Somlo and Joel Stanley as co-maintainers for
     LiteX

   - mtk-sd: Add support for the Mediatek MT8186 variant

   - renesas_sdhi: Add support for RZ/G2UL variant

   - renesas_sdhi: Add support for RZ/V2L variant

   - rtsx_pci: Adjust power-on sequence to conform to the SD spec

   - sdhci-am654: Add support for TI's AM62 variant

   - sdhci_am654: Fixup support for TI's AM64 variant

   - sdhci-esdhc-imx: Add support for the imx93 variant

   - sdhci-msm: Add support for the msm8953 variant

   - sdhci-pci-gli: Add support for runtime PM for the GL9763E variant

   - sdhci-pci-gli: Adjustments of the SSC function for the GL975x
     variants

   - sdhci-tegra: Add support for wake on SD card event

   - sunxi-mmc: Add support for Allwinner's F1c100s variant

   - sunxi-mmc: Add support for D1 MMC variant"

* tag 'mmc-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (37 commits)
  dt-bindings: mmc: renesas,sdhi: Document RZ/G2UL SoC
  mmc: tmio: remove outdated members from host struct
  mmc: mtk-sd: Silence delay phase calculation debug log
  mmc: davinci_mmc: Handle error for clk_enable
  mmc: sdhci-pci-gli: Add runtime PM for GL9763E
  mmc: core: Drop HS400 caps unless 8-bit bus is supported too
  mmc: host: Return an error when ->enable_sdio_irq() ops is missing
  mmc: core: Improve fallback to speed modes if eMMC HS200 fails
  dt-bindings: mmc: sunxi: add Allwinner F1c100s compatible
  mmc: dw-mmc-rockchip: Fix handling invalid clock rates
  mmc: dw_mmc: Support setting f_min from host drivers
  mmc: host: Drop commas after SoC match table sentinels
  mmc: rtsx: add 74 Clocks in power on flow
  dt-bindings: mmc: renesas,sdhi: Document RZ/V2L SoC
  mmc: sh_mmcif: Simplify division/shift logic
  mmc: sdhci_am654: Add Support for TI's AM62 SoC
  dt-bindings: mmc: imx-esdhc: Add imx93 compatible string
  dt-bindings: mmc: sdhci-am654: Add compatible string for AM62 SoC
  mmc: sdhci_am654: Fix the driver data of AM64 SoC
  mmc: core: use sysfs_emit() instead of sprintf()
  ...

26 files changed, 972 insertions, 120 deletions

diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 096ae624be9a..58a60afa650b 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -15,6 +15,7 @@
 #include <linux/stat.h>
 #include <linux/of.h>
 #include <linux/pm_runtime.h>
+#include <linux/sysfs.h>
 
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
@@ -34,13 +35,13 @@ static ssize_t type_show(struct device *dev,
 
 	switch (card->type) {
 	case MMC_TYPE_MMC:
-		return sprintf(buf, "MMC\n");
+		return sysfs_emit(buf, "MMC\n");
 	case MMC_TYPE_SD:
-		return sprintf(buf, "SD\n");
+		return sysfs_emit(buf, "SD\n");
 	case MMC_TYPE_SDIO:
-		return sprintf(buf, "SDIO\n");
+		return sysfs_emit(buf, "SDIO\n");
 	case MMC_TYPE_SD_COMBO:
-		return sprintf(buf, "SDcombo\n");
+		return sysfs_emit(buf, "SDcombo\n");
 	default:
 		return -EFAULT;
 	}
diff --git a/drivers/mmc/core/bus.h b/drivers/mmc/core/bus.h
index 8105852c4b62..3996b191b68d 100644
--- a/drivers/mmc/core/bus.h
+++ b/drivers/mmc/core/bus.h
@@ -9,6 +9,7 @@
 #define _MMC_CORE_BUS_H
 
 #include <linux/device.h>
+#include <linux/sysfs.h>
 
 struct mmc_host;
 struct mmc_card;
@@ -17,7 +18,7 @@ struct mmc_card;
 static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf)	\
 {										\
 	struct mmc_card *card = mmc_dev_to_card(dev);				\
-	return sprintf(buf, fmt, args);						\
+	return sysfs_emit(buf, fmt, args);					\
 }										\
 static DEVICE_ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
 
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index cf140f4ec864..2ed2b4d5e5a5 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -588,6 +588,25 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 
 EXPORT_SYMBOL(mmc_alloc_host);
 
+static int mmc_validate_host_caps(struct mmc_host *host)
+{
+	struct device *dev = host->parent;
+	u32 caps = host->caps, caps2 = host->caps2;
+
+	if (caps & MMC_CAP_SDIO_IRQ && !host->ops->enable_sdio_irq) {
+		dev_warn(dev, "missing ->enable_sdio_irq() ops\n");
+		return -EINVAL;
+	}
+
+	if (caps2 & (MMC_CAP2_HS400_ES | MMC_CAP2_HS400) &&
+	    !(caps & MMC_CAP_8_BIT_DATA)) {
+		dev_warn(dev, "drop HS400 support since no 8-bit bus\n");
+		host->caps2 = caps2 & ~MMC_CAP2_HS400_ES & ~MMC_CAP2_HS400;
+	}
+
+	return 0;
+}
+
 /**
  *	mmc_add_host - initialise host hardware
  *	@host: mmc host
@@ -600,8 +619,9 @@ int mmc_add_host(struct mmc_host *host)
 {
 	int err;
 
-	WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) &&
-		!host->ops->enable_sdio_irq);
+	err = mmc_validate_host_caps(host);
+	if (err)
+		return err;
 
 	err = device_add(&host->class_dev);
 	if (err)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 8421519c2a98..e7ea45386c22 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -12,6 +12,7 @@
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/pm_runtime.h>
+#include <linux/sysfs.h>
 
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
@@ -812,12 +813,11 @@ static ssize_t mmc_fwrev_show(struct device *dev,
 {
 	struct mmc_card *card = mmc_dev_to_card(dev);
 
-	if (card->ext_csd.rev < 7) {
-		return sprintf(buf, "0x%x\n", card->cid.fwrev);
-	} else {
-		return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
-			       card->ext_csd.fwrev);
-	}
+	if (card->ext_csd.rev < 7)
+		return sysfs_emit(buf, "0x%x\n", card->cid.fwrev);
+	else
+		return sysfs_emit(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
+				  card->ext_csd.fwrev);
 }
 
 static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
@@ -830,10 +830,10 @@ static ssize_t mmc_dsr_show(struct device *dev,
 	struct mmc_host *host = card->host;
 
 	if (card->csd.dsr_imp && host->dsr_req)
-		return sprintf(buf, "0x%x\n", host->dsr);
+		return sysfs_emit(buf, "0x%x\n", host->dsr);
 	else
 		/* return default DSR value */
-		return sprintf(buf, "0x%x\n", 0x404);
+		return sysfs_emit(buf, "0x%x\n", 0x404);
 }
 
 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
@@ -1355,11 +1355,6 @@ static int mmc_select_hs400es(struct mmc_card *card)
 	int err = -EINVAL;
 	u8 val;
 
-	if (!(host->caps & MMC_CAP_8_BIT_DATA)) {
-		err = -ENOTSUPP;
-		goto out_err;
-	}
-
 	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400_1_2V)
 		err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120);
 
@@ -1523,13 +1518,23 @@ static int mmc_select_timing(struct mmc_card *card)
 	if (!mmc_can_ext_csd(card))
 		goto bus_speed;
 
-	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES)
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS400ES) {
 		err = mmc_select_hs400es(card);
-	else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200)
+		goto out;
+	}
+
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS200) {
 		err = mmc_select_hs200(card);
-	else if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
+		if (err == -EBADMSG)
+			card->mmc_avail_type &= ~EXT_CSD_CARD_TYPE_HS200;
+		else
+			goto out;
+	}
+
+	if (card->mmc_avail_type & EXT_CSD_CARD_TYPE_HS)
 		err = mmc_select_hs(card);
 
+out:
 	if (err && err != -EBADMSG)
 		return err;
 
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index bfbfed30dc4d..68df6b2f49cc 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -13,6 +13,7 @@
 #include <linux/stat.h>
 #include <linux/pm_runtime.h>
 #include <linux/scatterlist.h>
+#include <linux/sysfs.h>
 
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
@@ -708,18 +709,16 @@ MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
 MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
 
 
-static ssize_t mmc_dsr_show(struct device *dev,
-                           struct device_attribute *attr,
-                           char *buf)
+static ssize_t mmc_dsr_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
 {
-       struct mmc_card *card = mmc_dev_to_card(dev);
-       struct mmc_host *host = card->host;
-
-       if (card->csd.dsr_imp && host->dsr_req)
-               return sprintf(buf, "0x%x\n", host->dsr);
-       else
-               /* return default DSR value */
-               return sprintf(buf, "0x%x\n", 0x404);
+	struct mmc_card *card = mmc_dev_to_card(dev);
+	struct mmc_host *host = card->host;
+
+	if (card->csd.dsr_imp && host->dsr_req)
+		return sysfs_emit(buf, "0x%x\n", host->dsr);
+	/* return default DSR value */
+	return sysfs_emit(buf, "0x%x\n", 0x404);
 }
 
 static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
@@ -735,9 +734,9 @@ static ssize_t info##num##_show(struct device *dev, struct device_attribute *att
 												\
 	if (num > card->num_info)								\
 		return -ENODATA;								\
-	if (!card->info[num-1][0])								\
+	if (!card->info[num - 1][0])								\
 		return 0;									\
-	return sprintf(buf, "%s\n", card->info[num-1]);						\
+	return sysfs_emit(buf, "%s\n", card->info[num - 1]);					\
 }												\
 static DEVICE_ATTR_RO(info##num)
 
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 41164748723d..25799accf8a0 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -7,6 +7,7 @@
 
 #include <linux/err.h>
 #include <linux/pm_runtime.h>
+#include <linux/sysfs.h>
 
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
@@ -40,9 +41,9 @@ static ssize_t info##num##_show(struct device *dev, struct device_attribute *att
 												\
 	if (num > card->num_info)								\
 		return -ENODATA;								\
-	if (!card->info[num-1][0])								\
+	if (!card->info[num - 1][0])								\
 		return 0;									\
-	return sprintf(buf, "%s\n", card->info[num-1]);						\
+	return sysfs_emit(buf, "%s\n", card->info[num - 1]);					\
 }												\
 static DEVICE_ATTR_RO(info##num)
 
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index fda03b35c14a..c6268c38c69e 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -14,6 +14,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/pm_domain.h>
 #include <linux/acpi.h>
+#include <linux/sysfs.h>
 
 #include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
@@ -35,7 +36,7 @@ field##_show(struct device *dev, struct device_attribute *attr, char *buf)				\
 	struct sdio_func *func;						\
 									\
 	func = dev_to_sdio_func (dev);					\
-	return sprintf(buf, format_string, args);			\
+	return sysfs_emit(buf, format_string, args);			\
 }									\
 static DEVICE_ATTR_RO(field)
 
@@ -52,9 +53,9 @@ static ssize_t info##num##_show(struct device *dev, struct device_attribute *att
 												\
 	if (num > func->num_info)								\
 		return -ENODATA;								\
-	if (!func->info[num-1][0])								\
+	if (!func->info[num - 1][0])								\
 		return 0;									\
-	return sprintf(buf, "%s\n", func->info[num-1]);						\
+	return sysfs_emit(buf, "%s\n", func->info[num - 1]);					\
 }												\
 static DEVICE_ATTR_RO(info##num)
 
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 52b0b27a6839..af6c3c329076 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -1094,3 +1094,16 @@ config MMC_OWL
 
 config MMC_SDHCI_EXTERNAL_DMA
 	bool
+
+config MMC_LITEX
+	tristate "LiteX MMC Host Controller support"
+	depends on ((PPC_MICROWATT || LITEX) && OF && HAVE_CLK) || COMPILE_TEST
+	select REGULATOR
+	select REGULATOR_FIXED_VOLTAGE
+	help
+	  This selects support for the MMC Host Controller found in LiteX SoCs.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called litex_mmc.
+
+	  If unsure, say N.
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index ea36d379bd3c..4e4ceb32c4b4 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -101,6 +101,7 @@ obj-$(CONFIG_MMC_CQHCI)			+= cqhci.o
 cqhci-y					+= cqhci-core.o
 cqhci-$(CONFIG_MMC_CRYPTO)		+= cqhci-crypto.o
 obj-$(CONFIG_MMC_HSQ)			+= mmc_hsq.o
+obj-$(CONFIG_MMC_LITEX)			+= litex_mmc.o
 
 ifeq ($(CONFIG_CB710_DEBUG),y)
 	CFLAGS-cb710-mmc	+= -DDEBUG
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 2a757c88f9d2..7138dfa065bf 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -1189,7 +1189,6 @@ static int mmc_davinci_parse_pdata(struct mmc_host *mmc)
 
 static int davinci_mmcsd_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *match;
 	struct mmc_davinci_host *host = NULL;
 	struct mmc_host *mmc = NULL;
 	struct resource *r, *mem = NULL;
@@ -1235,9 +1234,8 @@ static int davinci_mmcsd_probe(struct platform_device *pdev)
 
 	host->mmc_input_clk = clk_get_rate(host->clk);
 
-	match = of_match_device(davinci_mmc_dt_ids, &pdev->dev);
-	if (match) {
-		pdev->id_entry = match->data;
+	pdev->id_entry = of_device_get_match_data(&pdev->dev);
+	if (pdev->id_entry) {
 		ret = mmc_of_parse(mmc);
 		if (ret) {
 			dev_err_probe(&pdev->dev, ret,
@@ -1375,8 +1373,12 @@ static int davinci_mmcsd_suspend(struct device *dev)
 static int davinci_mmcsd_resume(struct device *dev)
 {
 	struct mmc_davinci_host *host = dev_get_drvdata(dev);
+	int ret;
+
+	ret = clk_enable(host->clk);
+	if (ret)
+		return ret;
 
-	clk_enable(host->clk);
 	mmc_davinci_reset_ctrl(host, 0);
 
 	return 0;
diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index 95d0ec0f5f3a..f825487aa739 100644
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -15,7 +15,9 @@
 #include "dw_mmc.h"
 #include "dw_mmc-pltfm.h"
 
-#define RK3288_CLKGEN_DIV       2
+#define RK3288_CLKGEN_DIV	2
+
+static const unsigned int freqs[] = { 100000, 200000, 300000, 400000 };
 
 struct dw_mci_rockchip_priv_data {
 	struct clk		*drv_clk;
@@ -51,7 +53,7 @@ static void dw_mci_rk3288_set_ios(struct dw_mci *host, struct mmc_ios *ios)
 
 	ret = clk_set_rate(host->ciu_clk, cclkin);
 	if (ret)
-		dev_warn(host->dev, "failed to set rate %uHz\n", ios->clock);
+		dev_warn(host->dev, "failed to set rate %uHz err: %d\n", cclkin, ret);
 
 	bus_hz = clk_get_rate(host->ciu_clk) / RK3288_CLKGEN_DIV;
 	if (bus_hz != host->bus_hz) {
@@ -290,13 +292,30 @@ static int dw_mci_rk3288_parse_dt(struct dw_mci *host)
 
 static int dw_mci_rockchip_init(struct dw_mci *host)
 {
+	int ret, i;
+
 	/* It is slot 8 on Rockchip SoCs */
 	host->sdio_id0 = 8;
 
-	if (of_device_is_compatible(host->dev->of_node,
-				    "rockchip,rk3288-dw-mshc"))
+	if (of_device_is_compatible(host->dev->of_node, "rockchip,rk3288-dw-mshc")) {
 		host->bus_hz /= RK3288_CLKGEN_DIV;
 
+		/* clock driver will fail if the clock is less than the lowest source clock
+		 * divided by the internal clock divider. Test for the lowest available
+		 * clock and set the minimum freq to clock / clock divider.
+		 */
+
+		for (i = 0; i < ARRAY_SIZE(freqs); i++) {
+			ret = clk_round_rate(host->ciu_clk, freqs[i] * RK3288_CLKGEN_DIV);
+			if (ret > 0) {
+				host->minimum_speed = ret / RK3288_CLKGEN_DIV;
+				break;
+			}
+		}
+		if (ret < 0)
+			dev_warn(host->dev, "no valid minimum freq: %d\n", ret);
+	}
+
 	return 0;
 }
 
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 42bf8a2287ba..06dc56cbada8 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2898,7 +2898,12 @@ static int dw_mci_init_slot_caps(struct dw_mci_slot *slot)
 	if (host->pdata->caps2)
 		mmc->caps2 = host->pdata->caps2;
 
-	mmc->f_min = DW_MCI_FREQ_MIN;
+	/* if host has set a minimum_freq, we should respect it */
+	if (host->minimum_speed)
+		mmc->f_min = host->minimum_speed;
+	else
+		mmc->f_min = DW_MCI_FREQ_MIN;
+
 	if (!mmc->f_max)
 		mmc->f_max = DW_MCI_FREQ_MAX;
 
@@ -3057,8 +3062,7 @@ static void dw_mci_init_dma(struct dw_mci *host)
 		dev_info(host->dev, "Using internal DMA controller.\n");
 	} else {
 		/* TRANS_MODE_EDMAC: check dma bindings again */
-		if ((device_property_read_string_array(dev, "dma-names",
-						       NULL, 0) < 0) ||
+		if ((device_property_string_array_count(dev, "dma-names") < 0) ||
 		    !device_property_present(dev, "dmas")) {
 			goto no_dma;
 		}
@@ -3568,7 +3572,7 @@ int dw_mci_runtime_resume(struct device *dev)
 	mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE);
 
 
-	if (host->slot->mmc->pm_flags & MMC_PM_KEEP_POWER)
+	if (host->slot && host->slot->mmc->pm_flags & MMC_PM_KEEP_POWER)
 		dw_mci_set_ios(host->slot->mmc, &host->slot->mmc->ios);
 
 	/* Force setup bus to guarantee available clock output */
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 7f1e38621d13..4ed81f94f7ca 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -99,6 +99,7 @@ struct dw_mci_dma_slave {
  * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus
  *	rate and timeout calculations.
  * @current_speed: Configured rate of the controller.
+ * @minimum_speed: Stored minimum rate of the controller.
  * @fifoth_val: The value of FIFOTH register.
  * @verid: Denote Version ID.
  * @dev: Device associated with the MMC controller.
@@ -201,6 +202,7 @@ struct dw_mci {
 
 	u32			bus_hz;
 	u32			current_speed;
+	u32			minimum_speed;
 	u32			fifoth_val;
 	u16			verid;
 	struct device		*dev;
diff --git a/drivers/mmc/host/litex_mmc.c b/drivers/mmc/host/litex_mmc.c
new file mode 100644
index 000000000000..6ba0d63b8c07
--- /dev/null
+++ b/drivers/mmc/host/litex_mmc.c
@@ -0,0 +1,661 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * LiteX LiteSDCard driver
+ *
+ * Copyright (C) 2019-2020 Antmicro <contact@antmicro.com>
+ * Copyright (C) 2019-2020 Kamil Rakoczy <krakoczy@antmicro.com>
+ * Copyright (C) 2019-2020 Maciej Dudek <mdudek@internships.antmicro.com>
+ * Copyright (C) 2020 Paul Mackerras <paulus@ozlabs.org>
+ * Copyright (C) 2020-2022 Gabriel Somlo <gsomlo@gmail.com>
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/litex.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+
+#define LITEX_PHY_CARDDETECT  0x00
+#define LITEX_PHY_CLOCKERDIV  0x04
+#define LITEX_PHY_INITIALIZE  0x08
+#define LITEX_PHY_WRITESTATUS 0x0C
+#define LITEX_CORE_CMDARG     0x00
+#define LITEX_CORE_CMDCMD     0x04
+#define LITEX_CORE_CMDSND     0x08
+#define LITEX_CORE_CMDRSP     0x0C
+#define LITEX_CORE_CMDEVT     0x1C
+#define LITEX_CORE_DATEVT     0x20
+#define LITEX_CORE_BLKLEN     0x24
+#define LITEX_CORE_BLKCNT     0x28
+#define LITEX_BLK2MEM_BASE    0x00
+#define LITEX_BLK2MEM_LEN     0x08
+#define LITEX_BLK2MEM_ENA     0x0C
+#define LITEX_BLK2MEM_DONE    0x10
+#define LITEX_BLK2MEM_LOOP    0x14
+#define LITEX_MEM2BLK_BASE    0x00
+#define LITEX_MEM2BLK_LEN     0x08
+#define LITEX_MEM2BLK_ENA     0x0C
+#define LITEX_MEM2BLK_DONE    0x10
+#define LITEX_MEM2BLK_LOOP    0x14
+#define LITEX_MEM2BLK         0x18
+#define LITEX_IRQ_STATUS      0x00
+#define LITEX_IRQ_PENDING     0x04
+#define LITEX_IRQ_ENABLE      0x08
+
+#define SD_CTL_DATA_XFER_NONE  0
+#define SD_CTL_DATA_XFER_READ  1
+#define SD_CTL_DATA_XFER_WRITE 2
+
+#define SD_CTL_RESP_NONE       0
+#define SD_CTL_RESP_SHORT      1
+#define SD_CTL_RESP_LONG       2
+#define SD_CTL_RESP_SHORT_BUSY 3
+
+#define SD_BIT_DONE    BIT(0)
+#define SD_BIT_WR_ERR  BIT(1)
+#define SD_BIT_TIMEOUT BIT(2)
+#define SD_BIT_CRC_ERR BIT(3)
+
+#define SD_SLEEP_US       5
+#define SD_TIMEOUT_US 20000
+
+#define SDIRQ_CARD_DETECT    1
+#define SDIRQ_SD_TO_MEM_DONE 2
+#define SDIRQ_MEM_TO_SD_DONE 4
+#define SDIRQ_CMD_DONE       8
+
+struct litex_mmc_host {
+	struct mmc_host *mmc;
+
+	void __iomem *sdphy;
+	void __iomem *sdcore;
+	void __iomem *sdreader;
+	void __iomem *sdwriter;
+	void __iomem *sdirq;
+
+	void *buffer;
+	size_t buf_size;
+	dma_addr_t dma;
+
+	struct completion cmd_done;
+	int irq;
+
+	unsigned int ref_clk;
+	unsigned int sd_clk;
+
+	u32 resp[4];
+	u16 rca;
+
+	bool is_bus_width_set;
+	bool app_cmd;
+};
+
+static int litex_mmc_sdcard_wait_done(void __iomem *reg, struct device *dev)
+{
+	u8 evt;
+	int ret;
+
+	ret = readx_poll_timeout(litex_read8, reg, evt, evt & SD_BIT_DONE,
+				 SD_SLEEP_US, SD_TIMEOUT_US);
+	if (ret)
+		return ret;
+	if (evt == SD_BIT_DONE)
+		return 0;
+	if (evt & SD_BIT_WR_ERR)
+		return -EIO;
+	if (evt & SD_BIT_TIMEOUT)
+		return -ETIMEDOUT;
+	if (evt & SD_BIT_CRC_ERR)
+		return -EILSEQ;
+	dev_err(dev, "%s: unknown error (evt=%x)\n", __func__, evt);
+	return -EINVAL;
+}
+
+static int litex_mmc_send_cmd(struct litex_mmc_host *host,
+			      u8 cmd, u32 arg, u8 response_len, u8 transfer)
+{
+	struct device *dev = mmc_dev(host->mmc);
+	void __iomem *reg;
+	int ret;
+	u8 evt;
+
+	litex_write32(host->sdcore + LITEX_CORE_CMDARG, arg);
+	litex_write32(host->sdcore + LITEX_CORE_CMDCMD,
+		      cmd << 8 | transfer << 5 | response_len);
+	litex_write8(host->sdcore + LITEX_CORE_CMDSND, 1);
+
+	/*
+	 * Wait for an interrupt if we have an interrupt and either there is
+	 * data to be transferred, or if the card can report busy via DAT0.
+	 */
+	if (host->irq > 0 &&
+	    (transfer != SD_CTL_DATA_XFER_NONE ||
+	     response_len == SD_CTL_RESP_SHORT_BUSY)) {
+		reinit_completion(&host->cmd_done);
+		litex_write32(host->sdirq + LITEX_IRQ_ENABLE,
+			      SDIRQ_CMD_DONE | SDIRQ_CARD_DETECT);
+		wait_for_completion(&host->cmd_done);
+	}
+
+	ret = litex_mmc_sdcard_wait_done(host->sdcore + LITEX_CORE_CMDEVT, dev);
+	if (ret) {
+		dev_err(dev, "Command (cmd %d) error, status %d\n", cmd, ret);
+		return ret;
+	}
+
+	if (response_len != SD_CTL_RESP_NONE) {
+		/*
+		 * NOTE: this matches the semantics of litex_read32()
+		 * regardless of underlying arch endianness!
+		 */
+		memcpy_fromio(host->resp,
+			      host->sdcore + LITEX_CORE_CMDRSP, 0x10);
+	}
+
+	if (!host->app_cmd && cmd == SD_SEND_RELATIVE_ADDR)
+		host->rca = (host->resp[3] >> 16);
+
+	host->app_cmd = (cmd == MMC_APP_CMD);
+
+	if (transfer == SD_CTL_DATA_XFER_NONE)
+		return ret; /* OK from prior litex_mmc_sdcard_wait_done() */
+
+	ret = litex_mmc_sdcard_wait_done(host->sdcore + LITEX_CORE_DATEVT, dev);
+	if (ret) {
+		dev_err(dev, "Data xfer (cmd %d) error, status %d\n", cmd, ret);
+		return ret;
+	}
+
+	/* Wait for completion of (read or write) DMA transfer */
+	reg = (transfer == SD_CTL_DATA_XFER_READ) ?
+		host->sdreader + LITEX_BLK2MEM_DONE :
+		host->sdwriter + LITEX_MEM2BLK_DONE;
+	ret = readx_poll_timeout(litex_read8, reg, evt, evt & SD_BIT_DONE,
+				 SD_SLEEP_US, SD_TIMEOUT_US);
+	if (ret)
+		dev_err(dev, "DMA timeout (cmd %d)\n", cmd);
+
+	return ret;
+}
+
+static int litex_mmc_send_app_cmd(struct litex_mmc_host *host)
+{
+	return litex_mmc_send_cmd(host, MMC_APP_CMD, host->rca << 16,
+				  SD_CTL_RESP_SHORT, SD_CTL_DATA_XFER_NONE);
+}
+
+static int litex_mmc_send_set_bus_w_cmd(struct litex_mmc_host *host, u32 width)
+{
+	return litex_mmc_send_cmd(host, SD_APP_SET_BUS_WIDTH, width,
+				  SD_CTL_RESP_SHORT, SD_CTL_DATA_XFER_NONE);
+}
+
+static int litex_mmc_set_bus_width(struct litex_mmc_host *host)
+{
+	bool app_cmd_sent;
+	int ret;
+
+	if (host->is_bus_width_set)
+		return 0;
+
+	/* Ensure 'app_cmd' precedes 'app_set_bus_width_cmd' */
+	app_cmd_sent = host->app_cmd; /* was preceding command app_cmd? */
+	if (!app_cmd_sent) {
+		ret = litex_mmc_send_app_cmd(host);
+		if (ret)
+			return ret;
+	}
+
+	/* LiteSDCard only supports 4-bit bus width */
+	ret = litex_mmc_send_set_bus_w_cmd(host, MMC_BUS_WIDTH_4);
+	if (ret)
+		return ret;
+
+	/* Re-send 'app_cmd' if necessary */
+	if (app_cmd_sent) {
+		ret = litex_mmc_send_app_cmd(host);
+		if (ret)
+			return ret;
+	}
+
+	host->is_bus_width_set = true;
+
+	return 0;
+}
+
+static int litex_mmc_get_cd(struct mmc_host *mmc)
+{
+	struct litex_mmc_host *host = mmc_priv(mmc);
+	int ret;
+
+	if (!mmc_card_is_removable(mmc))
+		return 1;
+
+	ret = !litex_read8(host->sdphy + LITEX_PHY_CARDDETECT);
+	if (ret)
+		return ret;
+
+	/* Ensure bus width will be set (again) upon card (re)insertion */
+	host->is_bus_width_set = false;
+
+	return 0;
+}
+
+static irqreturn_t litex_mmc_interrupt(int irq, void *arg)
+{
+	struct mmc_host *mmc = arg;
+	struct litex_mmc_host *host = mmc_priv(mmc);
+	u32 pending = litex_read32(host->sdirq + LITEX_IRQ_PENDING);
+	irqreturn_t ret = IRQ_NONE;
+
+	/* Check for card change interrupt */
+	if (pending & SDIRQ_CARD_DETECT) {
+		litex_write32(host->sdirq + LITEX_IRQ_PENDING,
+			      SDIRQ_CARD_DETECT);
+		mmc_detect_change(mmc, msecs_to_jiffies(10));
+		ret = IRQ_HANDLED;
+	}
+
+	/* Check for command completed */
+	if (pending & SDIRQ_CMD_DONE) {
+		/* Disable it so it doesn't keep interrupting */
+		litex_write32(host->sdirq + LITEX_IRQ_ENABLE,
+			      SDIRQ_CARD_DETECT);
+		complete(&host->cmd_done);
+		ret = IRQ_HANDLED;
+	}
+
+	return ret;
+}
+
+static u32 litex_mmc_response_len(struct mmc_command *cmd)
+{
+	if (cmd->flags & MMC_RSP_136)
+		return SD_CTL_RESP_LONG;
+	if (!(cmd->flags & MMC_RSP_PRESENT))
+		return SD_CTL_RESP_NONE;
+	if (cmd->flags & MMC_RSP_BUSY)
+		return SD_CTL_RESP_SHORT_BUSY;
+	return SD_CTL_RESP_SHORT;
+}
+
+static void litex_mmc_do_dma(struct litex_mmc_host *host, struct mmc_data *data,
+			     unsigned int *len, bool *direct, u8 *transfer)
+{
+	struct device *dev = mmc_dev(host->mmc);
+	dma_addr_t dma;
+	int sg_count;
+
+	/*
+	 * Try to DMA directly to/from the data buffer.
+	 * We can do that if the buffer can be mapped for DMA
+	 * in one contiguous chunk.
+	 */
+	dma = host->dma;
+	*len = data->blksz * data->blocks;
+	sg_count = dma_map_sg(dev, data->sg, data->sg_len,
+			      mmc_get_dma_dir(data));
+	if (sg_count == 1) {
+		dma = sg_dma_address(data->sg);
+		*len = sg_dma_len(data->sg);
+		*direct = true;
+	} else if (*len > host->buf_size)
+		*len = host->buf_size;
+
+	if (data->flags & MMC_DATA_READ) {
+		litex_write8(host->sdreader + LITEX_BLK2MEM_ENA, 0);
+		litex_write64(host->sdreader + LITEX_BLK2MEM_BASE, dma);
+		litex_write32(host->sdreader + LITEX_BLK2MEM_LEN, *len);
+		litex_write8(host->sdreader + LITEX_BLK2MEM_ENA, 1);
+		*transfer = SD_CTL_DATA_XFER_READ;
+	} else if (data->flags & MMC_DATA_WRITE) {
+		if (!*direct)
+			sg_copy_to_buffer(data->sg, data->sg_len,
+					  host->buffer, *len);
+		litex_write8(host->sdwriter + LITEX_MEM2BLK_ENA, 0);
+		litex_write64(host->sdwriter + LITEX_MEM2BLK_BASE, dma);
+		litex_write32(host->sdwriter + LITEX_MEM2BLK_LEN, *len);
+		litex_write8(host->sdwriter + LITEX_MEM2BLK_ENA, 1);
+		*transfer = SD_CTL_DATA_XFER_WRITE;
+	} else {
+		dev_warn(dev, "Data present w/o read or write flag.\n");
+		/* Continue: set cmd status, mark req done */
+	}
+
+	litex_write16(host->sdcore + LITEX_CORE_BLKLEN, data->blksz);
+	litex_write32(host->sdcore + LITEX_CORE_BLKCNT, data->blocks);
+}
+
+static void litex_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct litex_mmc_host *host = mmc_priv(mmc);
+	struct device *dev = mmc_dev(mmc);
+	struct mmc_command *cmd = mrq->cmd;
+	struct mmc_command *sbc = mrq->sbc;
+	struct mmc_data *data = mrq->data;
+	struct mmc_command *stop = mrq->stop;
+	unsigned int retries = cmd->retries;
+	unsigned int len = 0;
+	bool direct = false;
+	u32 response_len = litex_mmc_response_len(cmd);
+	u8 transfer = SD_CTL_DATA_XFER_NONE;
+
+	/* First check that the card is still there */
+	if (!litex_mmc_get_cd(mmc)) {
+		cmd->error = -ENOMEDIUM;
+		mmc_request_done(mmc, mrq);
+		return;
+	}
+
+	/* Send set-block-count command if needed */
+	if (sbc) {
+		sbc->error = litex_mmc_send_cmd(host, sbc->opcode, sbc->arg,
+						litex_mmc_response_len(sbc),
+						SD_CTL_DATA_XFER_NONE);
+		if (sbc->error) {
+			host->is_bus_width_set = false;
+			mmc_request_done(mmc, mrq);
+			return;
+		}
+	}
+
+	if (data) {
+		/*
+		 * LiteSDCard only supports 4-bit bus width; therefore, we MUST
+		 * inject a SET_BUS_WIDTH (acmd6) before the very first data
+		 * transfer, earlier than when the mmc subsystem would normally
+		 * get around to it!
+		 */
+		cmd->error = litex_mmc_set_bus_width(host);
+		if (cmd->error) {
+			dev_err(dev, "Can't set bus width!\n");
+			mmc_request_done(mmc, mrq);
+			return;
+		}
+
+		litex_mmc_do_dma(host, data, &len, &direct, &transfer);
+	}
+
+	do {
+		cmd->error = litex_mmc_send_cmd(host, cmd->opcode, cmd->arg,
+						response_len, transfer);
+	} while (cmd->error && retries-- > 0);
+
+	if (cmd->error) {
+		/* Card may be gone; don't assume bus width is still set */
+		host->is_bus_width_set = false;
+	}
+
+	if (response_len == SD_CTL_RESP_SHORT) {
+		/* Pull short response fields from appropriate host registers */
+		cmd->resp[0] = host->resp[3];
+		cmd->resp[1] = host->resp[2] & 0xFF;
+	} else if (response_len == SD_CTL_RESP_LONG) {
+		cmd->resp[0] = host->resp[0];
+		cmd->resp[1] = host->resp[1];
+		cmd->resp[2] = host->resp[2];
+		cmd->resp[3] = host->resp[3];
+	}
+
+	/* Send stop-transmission command if required */
+	if (stop && (cmd->error || !sbc)) {
+		stop->error = litex_mmc_send_cmd(host, stop->opcode, stop->arg,
+						 litex_mmc_response_len(stop),
+						 SD_CTL_DATA_XFER_NONE);
+		if (stop->error)
+			host->is_bus_width_set = false;
+	}
+
+	if (data) {
+		dma_unmap_sg(dev, data->sg, data->sg_len,
+			     mmc_get_dma_dir(data));
+	}
+
+	if (!cmd->error && transfer != SD_CTL_DATA_XFER_NONE) {
+		data->bytes_xfered = min(len, mmc->max_req_size);
+		if (transfer == SD_CTL_DATA_XFER_READ && !direct) {
+			sg_copy_from_buffer(data->sg, sg_nents(data->sg),
+					    host->buffer, data->bytes_xfered);
+		}
+	}
+
+	mmc_request_done(mmc, mrq);
+}
+
+static void litex_mmc_setclk(struct litex_mmc_host *host, unsigned int freq)
+{
+	struct device *dev = mmc_dev(host->mmc);
+	u32 div;
+
+	div = freq ? host->ref_clk / freq : 256U;
+	div = roundup_pow_of_two(div);
+	div = clamp(div, 2U, 256U);
+	dev_dbg(dev, "sd_clk_freq=%d: set to %d via div=%d\n",
+		freq, host->ref_clk / div, div);
+	litex_write16(host->sdphy + LITEX_PHY_CLOCKERDIV, div);
+	host->sd_clk = freq;
+}
+
+static void litex_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct litex_mmc_host *host = mmc_priv(mmc);
+
+	/*
+	 * NOTE: Ignore any ios->bus_width updates; they occur right after
+	 * the mmc core sends its own acmd6 bus-width change notification,
+	 * which is redundant since we snoop on the command flow and inject
+	 * an early acmd6 before the first data transfer command is sent!
+	 */
+
+	/* Update sd_clk */
+	if (ios->clock != host->sd_clk)
+		litex_mmc_setclk(host, ios->clock);
+}
+
+static const struct mmc_host_ops litex_mmc_ops = {
+	.get_cd = litex_mmc_get_cd,
+	.request = litex_mmc_request,
+	.set_ios = litex_mmc_set_ios,
+};
+
+static int litex_mmc_irq_init(struct platform_device *pdev,
+			      struct litex_mmc_host *host)
+{
+	struct device *dev = mmc_dev(host->mmc);
+	int ret;
+
+	ret = platform_get_irq_optional(pdev, 0);
+	if (ret < 0 && ret != -ENXIO)
+		return ret;
+	if (ret > 0)
+		host->irq = ret;
+	else {
+		dev_warn(dev, "Failed to get IRQ, using polling\n");
+		goto use_polling;
+	}
+
+	host->sdirq = devm_platform_ioremap_resource_byname(pdev, "irq");
+	if (IS_ERR(host->sdirq))
+		return PTR_ERR(host->sdirq);
+
+	ret = devm_request_irq(dev, host->irq, litex_mmc_interrupt, 0,
+			       "litex-mmc", host->mmc);
+	if (ret < 0) {
+		dev_warn(dev, "IRQ request error %d, using polling\n", ret);
+		goto use_polling;
+	}
+
+	/* Clear & enable card-change interrupts */
+	litex_write32(host->sdirq + LITEX_IRQ_PENDING, SDIRQ_CARD_DETECT);
+	litex_write32(host->sdirq + LITEX_IRQ_ENABLE, SDIRQ_CARD_DETECT);
+
+	return 0;
+
+use_polling:
+	host->mmc->caps |= MMC_CAP_NEEDS_POLL;
+	return 0;
+}
+
+static void litex_mmc_free_host_wrapper(void *mmc)
+{
+	mmc_free_host(mmc);
+}
+
+static int litex_mmc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct litex_mmc_host *host;
+	struct mmc_host *mmc;
+	struct clk *clk;
+	int ret;
+
+	/*
+	 * NOTE: defaults to max_[req,seg]_size=PAGE_SIZE, max_blk_size=512,
+	 * and max_blk_count accordingly set to 8;
+	 * If for some reason we need to modify max_blk_count, we must also
+	 * re-calculate `max_[req,seg]_size = max_blk_size * max_blk_count;`
+	 */
+	mmc = mmc_alloc_host(sizeof(struct litex_mmc_host), dev);
+	if (!mmc)
+		return -ENOMEM;
+
+	ret = devm_add_action_or_reset(dev, litex_mmc_free_host_wrapper, mmc);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Can't register mmc_free_host action\n");
+
+	host = mmc_priv(mmc);
+	host->mmc = mmc;
+
+	/* Initialize clock source */
+	clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(clk))
+		return dev_err_probe(dev, PTR_ERR(clk), "can't get clock\n");
+	host->ref_clk = clk_get_rate(clk);
+	host->sd_clk = 0;
+
+	/*
+	 * LiteSDCard only supports 4-bit bus width; therefore, we MUST inject
+	 * a SET_BUS_WIDTH (acmd6) before the very first data transfer, earlier
+	 * than when the mmc subsystem would normally get around to it!
+	 */
+	host->is_bus_width_set = false;
+	host->app_cmd = false;
+
+	/* LiteSDCard can support 64-bit DMA addressing */
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+	if (ret)
+		return ret;
+
+	host->buf_size = mmc->max_req_size * 2;
+	host->buffer = dmam_alloc_coherent(dev, host->buf_size,
+					   &host->dma, GFP_KERNEL);
+	if (host->buffer == NULL)
+		return -ENOMEM;
+
+	host->sdphy = devm_platform_ioremap_resource_byname(pdev, "phy");
+	if (IS_ERR(host->sdphy))
+		return PTR_ERR(host->sdphy);
+
+	host->sdcore = devm_platform_ioremap_resource_byname(pdev, "core");
+	if (IS_ERR(host->sdcore))
+		return PTR_ERR(host->sdcore);
+
+	host->sdreader = devm_platform_ioremap_resource_byname(pdev, "reader");
+	if (IS_ERR(host->sdreader))
+		return PTR_ERR(host->sdreader);
+
+	host->sdwriter = devm_platform_ioremap_resource_byname(pdev, "writer");
+	if (IS_ERR(host->sdwriter))
+		return PTR_ERR(host->sdwriter);
+
+	/* Ensure DMA bus masters are disabled */
+	litex_write8(host->sdreader + LITEX_BLK2MEM_ENA, 0);
+	litex_write8(host->sdwriter + LITEX_MEM2BLK_ENA, 0);
+
+	init_completion(&host->cmd_done);
+	ret = litex_mmc_irq_init(pdev, host);
+	if (ret)
+		return ret;
+
+	mmc->ops = &litex_mmc_ops;
+
+	ret = mmc_regulator_get_supply(mmc);
+	if (ret || mmc->ocr_avail == 0) {
+		dev_warn(dev, "can't get voltage, defaulting to 3.3V\n");
+		mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+	}
+
+	/*
+	 * Set default sd_clk frequency range based on empirical observations
+	 * of LiteSDCard gateware behavior on typical SDCard media
+	 */
+	mmc->f_min = 12.5e6;
+	mmc->f_max = 50e6;
+
+	ret = mmc_of_parse(mmc);
+	if (ret)
+		return ret;
+
+	/* Force 4-bit bus_width (only width supported by hardware) */
+	mmc->caps &= ~MMC_CAP_8_BIT_DATA;
+	mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+	/* Set default capabilities */
+	mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY |
+		     MMC_CAP_DRIVER_TYPE_D |
+		     MMC_CAP_CMD23;
+	mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT |
+		      MMC_CAP2_NO_SDIO |
+		      MMC_CAP2_NO_MMC;
+
+	platform_set_drvdata(pdev, host);
+
+	ret = mmc_add_host(mmc);
+	if (ret)
+		return ret;
+
+	dev_info(dev, "LiteX MMC controller initialized.\n");
+	return 0;
+}
+
+static int litex_mmc_remove(struct platform_device *pdev)
+{
+	struct litex_mmc_host *host = platform_get_drvdata(pdev);
+
+	mmc_remove_host(host->mmc);
+	return 0;
+}
+
+static const struct of_device_id litex_match[] = {
+	{ .compatible = "litex,mmc" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, litex_match);
+
+static struct platform_driver litex_mmc_driver = {
+	.probe = litex_mmc_probe,
+	.remove = litex_mmc_remove,
+	.driver = {
+		.name = "litex-mmc",
+		.of_match_table = litex_match,
+	},
+};
+module_platform_driver(litex_mmc_driver);
+
+MODULE_DESCRIPTION("LiteX SDCard driver");
+MODULE_AUTHOR("Antmicro <contact@antmicro.com>");
+MODULE_AUTHOR("Kamil Rakoczy <krakoczy@antmicro.com>");
+MODULE_AUTHOR("Maciej Dudek <mdudek@internships.antmicro.com>");
+MODULE_AUTHOR("Paul Mackerras <paulus@ozlabs.org>");
+MODULE_AUTHOR("Gabriel Somlo <gsomlo@gmail.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 65037e1d7723..e61b0b98065a 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -1911,8 +1911,8 @@ static struct msdc_delay_phase get_best_delay(struct msdc_host *host, u32 delay)
 		final_phase = (start_final + len_final / 3) % PAD_DELAY_MAX;
 	else
 		final_phase = (start_final + len_final / 2) % PAD_DELAY_MAX;
-	dev_info(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n",
-		 delay, len_final, final_phase);
+	dev_dbg(host->dev, "phase: [map:%x] [maxlen:%d] [final:%d]\n",
+		delay, len_final, final_phase);
 
 	delay_phase.maxlen = len_final;
 	delay_phase.start = start_final;
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index 9d2c600fd4ce..1685df00863b 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -212,7 +212,7 @@ static const struct soc_device_attribute sdhi_quirks_match[]  = {
 	{ .soc_id = "r8a7795", .revision = "ES2.0", .data = &sdhi_quirks_4tap },
 	{ .soc_id = "r8a7796", .revision = "ES1.[012]", .data = &sdhi_quirks_4tap_nohs400 },
 	{ .soc_id = "r8a7796", .revision = "ES1.*", .data = &sdhi_quirks_r8a7796_es13 },
-	{ /* Sentinel. */ },
+	{ /* Sentinel. */ }
 };
 
 static const struct renesas_sdhi_of_data_with_quirks of_r8a7795_compatible = {
diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index 58cfaffa3c2d..219029224727 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -38,10 +38,7 @@ struct realtek_pci_sdmmc {
 	bool			double_clk;
 	bool			eject;
 	bool			initial_mode;
-	int			power_state;
-#define SDMMC_POWER_ON		1
-#define SDMMC_POWER_OFF		0
-
+	int			prev_power_state;
 	int			sg_count;
 	s32			cookie;
 	int			cookie_sg_count;
@@ -905,7 +902,7 @@ static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
 	return err;
 }
 
-static int sd_power_on(struct realtek_pci_sdmmc *host)
+static int sd_power_on(struct realtek_pci_sdmmc *host, unsigned char power_mode)
 {
 	struct rtsx_pcr *pcr = host->pcr;
 	struct mmc_host *mmc = host->mmc;
@@ -913,9 +910,14 @@ static int sd_power_on(struct realtek_pci_sdmmc *host)
 	u32 val;
 	u8 test_mode;
 
-	if (host->power_state == SDMMC_POWER_ON)
+	if (host->prev_power_state == MMC_POWER_ON)
 		return 0;
 
+	if (host->prev_power_state == MMC_POWER_UP) {
+		rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, 0);
+		goto finish;
+	}
+
 	msleep(100);
 
 	rtsx_pci_init_cmd(pcr);
@@ -936,10 +938,15 @@ static int sd_power_on(struct realtek_pci_sdmmc *host)
 	if (err < 0)
 		return err;
 
+	mdelay(1);
+
 	err = rtsx_pci_write_register(pcr, CARD_OE, SD_OUTPUT_EN, SD_OUTPUT_EN);
 	if (err < 0)
 		return err;
 
+	/* send at least 74 clocks */
+	rtsx_pci_write_register(pcr, SD_BUS_STAT, SD_CLK_TOGGLE_EN, SD_CLK_TOGGLE_EN);
+
 	if (PCI_PID(pcr) == PID_5261) {
 		/*
 		 * If test mode is set switch to SD Express mandatorily,
@@ -964,7 +971,8 @@ static int sd_power_on(struct realtek_pci_sdmmc *host)
 		}
 	}
 
-	host->power_state = SDMMC_POWER_ON;
+finish:
+	host->prev_power_state = power_mode;
 	return 0;
 }
 
@@ -973,7 +981,7 @@ static int sd_power_off(struct realtek_pci_sdmmc *host)
 	struct rtsx_pcr *pcr = host->pcr;
 	int err;
 
-	host->power_state = SDMMC_POWER_OFF;
+	host->prev_power_state = MMC_POWER_OFF;
 
 	rtsx_pci_init_cmd(pcr);
 
@@ -999,7 +1007,7 @@ static int sd_set_power_mode(struct realtek_pci_sdmmc *host,
 	if (power_mode == MMC_POWER_OFF)
 		err = sd_power_off(host);
 	else
-		err = sd_power_on(host);
+		err = sd_power_on(host, power_mode);
 
 	return err;
 }
@@ -1482,10 +1490,11 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
 
 	host = mmc_priv(mmc);
 	host->pcr = pcr;
+	mmc->ios.power_delay_ms = 5;
 	host->mmc = mmc;
 	host->pdev = pdev;
 	host->cookie = -1;
-	host->power_state = SDMMC_POWER_OFF;
+	host->prev_power_state = MMC_POWER_OFF;
 	INIT_WORK(&host->work, sd_request);
 	platform_set_drvdata(pdev, host);
 	pcr->slots[RTSX_SD_CARD].p_dev = pdev;
diff --git a/drivers/mmc/host/sdhci-of-at91.c b/drivers/mmc/host/sdhci-of-at91.c
index d1a1c548c515..10fb4cb2c731 100644
--- a/drivers/mmc/host/sdhci-of-at91.c
+++ b/drivers/mmc/host/sdhci-of-at91.c
@@ -308,17 +308,15 @@ static const struct dev_pm_ops sdhci_at91_dev_pm_ops = {
 
 static int sdhci_at91_probe(struct platform_device *pdev)
 {
-	const struct of_device_id	*match;
 	const struct sdhci_at91_soc_data	*soc_data;
 	struct sdhci_host		*host;
 	struct sdhci_pltfm_host		*pltfm_host;
 	struct sdhci_at91_priv		*priv;
 	int				ret;
 
-	match = of_match_device(sdhci_at91_dt_match, &pdev->dev);
-	if (!match)
+	soc_data = of_device_get_match_data(&pdev->dev);
+	if (!soc_data)
 		return -EINVAL;
-	soc_data = match->data;
 
 	host = sdhci_pltfm_init(pdev, soc_data->pdata, sizeof(*priv));
 	if (IS_ERR(host))
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 0f3658b36513..d9dc41143bb3 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -934,7 +934,7 @@ static struct soc_device_attribute soc_tuning_erratum_type1[] = {
 	{ .family = "QorIQ T1040", },
 	{ .family = "QorIQ T2080", },
 	{ .family = "QorIQ LS1021A", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static struct soc_device_attribute soc_tuning_erratum_type2[] = {
@@ -944,7 +944,7 @@ static struct soc_device_attribute soc_tuning_erratum_type2[] = {
 	{ .family = "QorIQ LS1080A", },
 	{ .family = "QorIQ LS2080A", },
 	{ .family = "QorIQ LA1575A", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static void esdhc_tuning_block_enable(struct sdhci_host *host, bool enable)
@@ -1316,21 +1316,21 @@ static const struct sdhci_pltfm_data sdhci_esdhc_le_pdata = {
 static struct soc_device_attribute soc_incorrect_hostver[] = {
 	{ .family = "QorIQ T4240", .revision = "1.0", },
 	{ .family = "QorIQ T4240", .revision = "2.0", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static struct soc_device_attribute soc_fixup_sdhc_clkdivs[] = {
 	{ .family = "QorIQ LX2160A", .revision = "1.0", },
 	{ .family = "QorIQ LX2160A", .revision = "2.0", },
 	{ .family = "QorIQ LS1028A", .revision = "1.0", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static struct soc_device_attribute soc_unreliable_pulse_detection[] = {
 	{ .family = "QorIQ LX2160A", .revision = "1.0", },
 	{ .family = "QorIQ LX2160A", .revision = "2.0", },
 	{ .family = "QorIQ LS1028A", .revision = "1.0", },
-	{ },
+	{ /* sentinel */ }
 };
 
 static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index 97035d77c18c..d09728c37d03 100644
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -13,6 +13,7 @@
 #include <linux/mmc/mmc.h>
 #include <linux/delay.h>
 #include <linux/of.h>
+#include <linux/iopoll.h>
 #include "sdhci.h"
 #include "sdhci-pci.h"
 #include "cqhci.h"
@@ -63,6 +64,7 @@
 #define   GLI_9750_MISC_RX_INV_OFF       0x0
 #define   GLI_9750_MISC_RX_INV_VALUE     GLI_9750_MISC_RX_INV_OFF
 #define   GLI_9750_MISC_TX1_DLY_VALUE    0x5
+#define   SDHCI_GLI_9750_MISC_SSC_OFF    BIT(26)
 
 #define SDHCI_GLI_9750_TUNING_CONTROL	          0x540
 #define   SDHCI_GLI_9750_TUNING_CONTROL_EN          BIT(4)
@@ -137,6 +139,9 @@
 #define PCI_GLI_9755_SerDes  0x70
 #define PCI_GLI_9755_SCP_DIS   BIT(19)
 
+#define PCI_GLI_9755_MISC	    0x78
+#define   PCI_GLI_9755_MISC_SSC_OFF    BIT(26)
+
 #define GLI_MAX_TUNING_LOOP 40
 
 /* Genesys Logic chipset */
@@ -371,6 +376,19 @@ static void gl9750_set_pll(struct sdhci_host *host, u8 dir, u16 ldiv, u8 pdiv)
 	mdelay(1);
 }
 
+static bool gl9750_ssc_enable(struct sdhci_host *host)
+{
+	u32 misc;
+	u8 off;
+
+	gl9750_wt_on(host);
+	misc = sdhci_readl(host, SDHCI_GLI_9750_MISC);
+	off = FIELD_GET(SDHCI_GLI_9750_MISC_SSC_OFF, misc);
+	gl9750_wt_off(host);
+
+	return !off;
+}
+
 static void gl9750_set_ssc(struct sdhci_host *host, u8 enable, u8 step, u16 ppm)
 {
 	u32 pll;
@@ -392,11 +410,31 @@ static void gl9750_set_ssc(struct sdhci_host *host, u8 enable, u8 step, u16 ppm)
 
 static void gl9750_set_ssc_pll_205mhz(struct sdhci_host *host)
 {
-	/* set pll to 205MHz and enable ssc */
-	gl9750_set_ssc(host, 0x1, 0x1F, 0xFFE7);
+	bool enable = gl9750_ssc_enable(host);
+
+	/* set pll to 205MHz and ssc */
+	gl9750_set_ssc(host, enable, 0xF, 0x5A1D);
 	gl9750_set_pll(host, 0x1, 0x246, 0x0);
 }
 
+static void gl9750_set_ssc_pll_100mhz(struct sdhci_host *host)
+{
+	bool enable = gl9750_ssc_enable(host);
+
+	/* set pll to 100MHz and ssc */
+	gl9750_set_ssc(host, enable, 0xE, 0x51EC);
+	gl9750_set_pll(host, 0x1, 0x244, 0x1);
+}
+
+static void gl9750_set_ssc_pll_50mhz(struct sdhci_host *host)
+{
+	bool enable = gl9750_ssc_enable(host);
+
+	/* set pll to 50MHz and ssc */
+	gl9750_set_ssc(host, enable, 0xE, 0x51EC);
+	gl9750_set_pll(host, 0x1, 0x244, 0x3);
+}
+
 static void sdhci_gl9750_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	struct mmc_ios *ios = &host->mmc->ios;
@@ -414,6 +452,10 @@ static void sdhci_gl9750_set_clock(struct sdhci_host *host, unsigned int clock)
 	if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
 		host->mmc->actual_clock = 205000000;
 		gl9750_set_ssc_pll_205mhz(host);
+	} else if (clock == 100000000) {
+		gl9750_set_ssc_pll_100mhz(host);
+	} else if (clock == 50000000) {
+		gl9750_set_ssc_pll_50mhz(host);
 	}
 
 	sdhci_enable_clk(host, clk);
@@ -514,6 +556,19 @@ static void gl9755_set_pll(struct pci_dev *pdev, u8 dir, u16 ldiv, u8 pdiv)
 	mdelay(1);
 }
 
+static bool gl9755_ssc_enable(struct pci_dev *pdev)
+{
+	u32 misc;
+	u8 off;
+
+	gl9755_wt_on(pdev);
+	pci_read_config_dword(pdev, PCI_GLI_9755_MISC, &misc);
+	off = FIELD_GET(PCI_GLI_9755_MISC_SSC_OFF, misc);
+	gl9755_wt_off(pdev);
+
+	return !off;
+}
+
 static void gl9755_set_ssc(struct pci_dev *pdev, u8 enable, u8 step, u16 ppm)
 {
 	u32 pll;
@@ -535,11 +590,31 @@ static void gl9755_set_ssc(struct pci_dev *pdev, u8 enable, u8 step, u16 ppm)
 
 static void gl9755_set_ssc_pll_205mhz(struct pci_dev *pdev)
 {
-	/* set pll to 205MHz and enable ssc */
-	gl9755_set_ssc(pdev, 0x1, 0x1F, 0xFFE7);
+	bool enable = gl9755_ssc_enable(pdev);
+
+	/* set pll to 205MHz and ssc */
+	gl9755_set_ssc(pdev, enable, 0xF, 0x5A1D);
 	gl9755_set_pll(pdev, 0x1, 0x246, 0x0);
 }
 
+static void gl9755_set_ssc_pll_100mhz(struct pci_dev *pdev)
+{
+	bool enable = gl9755_ssc_enable(pdev);
+
+	/* set pll to 100MHz and ssc */
+	gl9755_set_ssc(pdev, enable, 0xE, 0x51EC);
+	gl9755_set_pll(pdev, 0x1, 0x244, 0x1);
+}
+
+static void gl9755_set_ssc_pll_50mhz(struct pci_dev *pdev)
+{
+	bool enable = gl9755_ssc_enable(pdev);
+
+	/* set pll to 50MHz and ssc */
+	gl9755_set_ssc(pdev, enable, 0xE, 0x51EC);
+	gl9755_set_pll(pdev, 0x1, 0x244, 0x3);
+}
+
 static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock)
 {
 	struct sdhci_pci_slot *slot = sdhci_priv(host);
@@ -560,6 +635,10 @@ static void sdhci_gl9755_set_clock(struct sdhci_host *host, unsigned int clock)
 	if (clock == 200000000 && ios->timing == MMC_TIMING_UHS_SDR104) {
 		host->mmc->actual_clock = 205000000;
 		gl9755_set_ssc_pll_205mhz(pdev);
+	} else if (clock == 100000000) {
+		gl9755_set_ssc_pll_100mhz(pdev);
+	} else if (clock == 50000000) {
+		gl9755_set_ssc_pll_50mhz(pdev);
 	}
 
 	sdhci_enable_clk(host, clk);
@@ -873,6 +952,47 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
 	pci_write_config_dword(pdev, PCIE_GLI_9763E_VHS, value);
 }
 
+#ifdef CONFIG_PM
+static int gl9763e_runtime_suspend(struct sdhci_pci_chip *chip)
+{
+	struct sdhci_pci_slot *slot = chip->slots[0];
+	struct sdhci_host *host = slot->host;
+	u16 clock;
+
+	clock = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+	clock &= ~(SDHCI_CLOCK_PLL_EN | SDHCI_CLOCK_CARD_EN);
+	sdhci_writew(host, clock, SDHCI_CLOCK_CONTROL);
+
+	return 0;
+}
+
+static int gl9763e_runtime_resume(struct sdhci_pci_chip *chip)
+{
+	struct sdhci_pci_slot *slot = chip->slots[0];
+	struct sdhci_host *host = slot->host;
+	u16 clock;
+
+	clock = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
+
+	clock |= SDHCI_CLOCK_PLL_EN;
+	clock &= ~SDHCI_CLOCK_INT_STABLE;
+	sdhci_writew(host, clock, SDHCI_CLOCK_CONTROL);
+
+	/* Wait max 150 ms */
+	if (read_poll_timeout(sdhci_readw, clock, (clock & SDHCI_CLOCK_INT_STABLE),
+			      1000, 150000, false, host, SDHCI_CLOCK_CONTROL)) {
+		pr_err("%s: PLL clock never stabilised.\n",
+		       mmc_hostname(host->mmc));
+		sdhci_dumpregs(host);
+	}
+
+	clock |= SDHCI_CLOCK_CARD_EN;
+	sdhci_writew(host, clock, SDHCI_CLOCK_CONTROL);
+
+	return 0;
+}
+#endif
+
 static int gli_probe_slot_gl9763e(struct sdhci_pci_slot *slot)
 {
 	struct pci_dev *pdev = slot->chip->pdev;
@@ -983,5 +1103,10 @@ const struct sdhci_pci_fixes sdhci_gl9763e = {
 	.resume		= sdhci_cqhci_gli_resume,
 	.suspend	= sdhci_cqhci_gli_suspend,
 #endif
+#ifdef CONFIG_PM
+	.runtime_suspend = gl9763e_runtime_suspend,
+	.runtime_resume  = gl9763e_runtime_resume,
+	.allow_runtime_pm = true,
+#endif
 	.add_host       = gl9763e_add_host,
 };
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 35ebba067e87..2d2d8260c681 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -1618,7 +1618,6 @@ cleanup:
 
 static int sdhci_tegra_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *match;
 	const struct sdhci_tegra_soc_data *soc_data;
 	struct sdhci_host *host;
 	struct sdhci_pltfm_host *pltfm_host;
@@ -1626,10 +1625,9 @@ static int sdhci_tegra_probe(struct platform_device *pdev)
 	struct clk *clk;
 	int rc;
 
-	match = of_match_device(sdhci_tegra_dt_match, &pdev->dev);
-	if (!match)
+	soc_data = of_device_get_match_data(&pdev->dev);
+	if (!soc_data)
 		return -EINVAL;
-	soc_data = match->data;
 
 	host = sdhci_pltfm_init(pdev, soc_data->pdata, sizeof(*tegra_host));
 	if (IS_ERR(host))
@@ -1673,6 +1671,9 @@ static int sdhci_tegra_probe(struct platform_device *pdev)
 	/* HW busy detection is supported, but R1B responses are required. */
 	host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_NEED_RSP_BUSY;
 
+	/* GPIO CD can be set as a wakeup source */
+	host->mmc->caps |= MMC_CAP_CD_WAKE;
+
 	tegra_sdhci_parse_dt(host);
 
 	tegra_host->power_gpio = devm_gpiod_get_optional(&pdev->dev, "power",
@@ -1840,7 +1841,7 @@ static int sdhci_tegra_suspend(struct device *dev)
 		return ret;
 	}
 
-	return 0;
+	return mmc_gpio_set_cd_wake(host->mmc, true);
 }
 
 static int sdhci_tegra_resume(struct device *dev)
@@ -1848,6 +1849,10 @@ static int sdhci_tegra_resume(struct device *dev)
 	struct sdhci_host *host = dev_get_drvdata(dev);
 	int ret;
 
+	ret = mmc_gpio_set_cd_wake(host->mmc, false);
+	if (ret)
+		return ret;
+
 	ret = pm_runtime_force_resume(dev);
 	if (ret)
 		return ret;
diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
index f654afbe8e83..e54fe24d47e7 100644
--- a/drivers/mmc/host/sdhci_am654.c
+++ b/drivers/mmc/host/sdhci_am654.c
@@ -514,26 +514,6 @@ static const struct sdhci_am654_driver_data sdhci_j721e_4bit_drvdata = {
 	.flags = IOMUX_PRESENT,
 };
 
-static const struct sdhci_pltfm_data sdhci_am64_8bit_pdata = {
-	.ops = &sdhci_j721e_8bit_ops,
-	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
-};
-
-static const struct sdhci_am654_driver_data sdhci_am64_8bit_drvdata = {
-	.pdata = &sdhci_am64_8bit_pdata,
-	.flags = DLL_PRESENT | DLL_CALIB,
-};
-
-static const struct sdhci_pltfm_data sdhci_am64_4bit_pdata = {
-	.ops = &sdhci_j721e_4bit_ops,
-	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
-};
-
-static const struct sdhci_am654_driver_data sdhci_am64_4bit_drvdata = {
-	.pdata = &sdhci_am64_4bit_pdata,
-	.flags = IOMUX_PRESENT,
-};
-
 static const struct soc_device_attribute sdhci_am654_devices[] = {
 	{ .family = "AM65X",
 	  .revision = "SR1.0",
@@ -759,11 +739,15 @@ static const struct of_device_id sdhci_am654_of_match[] = {
 	},
 	{
 		.compatible = "ti,am64-sdhci-8bit",
-		.data = &sdhci_am64_8bit_drvdata,
+		.data = &sdhci_j721e_8bit_drvdata,
 	},
 	{
 		.compatible = "ti,am64-sdhci-4bit",
-		.data = &sdhci_am64_4bit_drvdata,
+		.data = &sdhci_j721e_4bit_drvdata,
+	},
+	{
+		.compatible = "ti,am62-sdhci",
+		.data = &sdhci_j721e_4bit_drvdata,
 	},
 	{ /* sentinel */ }
 };
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 104dcd702870..5f9ebf045b1c 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -521,8 +521,7 @@ static void sh_mmcif_clock_control(struct sh_mmcif_host *host, unsigned int clk)
 		}
 
 		dev_dbg(dev, "clk %u/%u (%u, 0x%x)\n",
-			(best_freq / (1 << (clkdiv + 1))), clk,
-			best_freq, clkdiv);
+			(best_freq >> (clkdiv + 1)), clk, best_freq, clkdiv);
 
 		clk_set_rate(host->clk, best_freq);
 		clkdiv = clkdiv << 16;
@@ -1012,8 +1011,8 @@ static void sh_mmcif_clk_setup(struct sh_mmcif_host *host)
 		 */
 		host->clkdiv_map = 0x3ff;
 
-		host->mmc->f_max = f_max / (1 << ffs(host->clkdiv_map));
-		host->mmc->f_min = f_min / (1 << fls(host->clkdiv_map));
+		host->mmc->f_max = f_max >> ffs(host->clkdiv_map);
+		host->mmc->f_min = f_min >> fls(host->clkdiv_map);
 	} else {
 		unsigned int clk = clk_get_rate(host->clk);
 
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index 2702736a1c57..c62afd212692 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -1167,6 +1167,14 @@ static const struct sunxi_mmc_cfg sun9i_a80_cfg = {
 	.can_calibrate = false,
 };
 
+static const struct sunxi_mmc_cfg sun20i_d1_cfg = {
+	.idma_des_size_bits = 13,
+	.idma_des_shift = 2,
+	.can_calibrate = true,
+	.mask_data0 = true,
+	.needs_new_timings = true,
+};
+
 static const struct sunxi_mmc_cfg sun50i_a64_cfg = {
 	.idma_des_size_bits = 16,
 	.clk_delays = NULL,
@@ -1205,6 +1213,7 @@ static const struct of_device_id sunxi_mmc_of_match[] = {
 	{ .compatible = "allwinner,sun7i-a20-mmc", .data = &sun7i_a20_cfg },
 	{ .compatible = "allwinner,sun8i-a83t-emmc", .data = &sun8i_a83t_emmc_cfg },
 	{ .compatible = "allwinner,sun9i-a80-mmc", .data = &sun9i_a80_cfg },
+	{ .compatible = "allwinner,sun20i-d1-mmc", .data = &sun20i_d1_cfg },
 	{ .compatible = "allwinner,sun50i-a64-mmc", .data = &sun50i_a64_cfg },
 	{ .compatible = "allwinner,sun50i-a64-emmc", .data = &sun50i_a64_emmc_cfg },
 	{ .compatible = "allwinner,sun50i-a100-mmc", .data = &sun50i_a100_cfg },
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index f936aad945ce..e754bb3f5c32 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -186,10 +186,6 @@ struct tmio_mmc_host {
 	void (*fixup_request)(struct tmio_mmc_host *host, struct mmc_request *mrq);
 	unsigned int (*get_timeout_cycles)(struct tmio_mmc_host *host);
 
-	void (*prepare_hs400_tuning)(struct tmio_mmc_host *host);
-	void (*hs400_downgrade)(struct tmio_mmc_host *host);
-	void (*hs400_complete)(struct tmio_mmc_host *host);
-
 	const struct tmio_mmc_dma_ops *dma_ops;
 };
 
diff --git a/drivers/mmc/host/wmt-sdmmc.c b/drivers/mmc/host/wmt-sdmmc.c
index cf10949fb0ac..163ac9df8cca 100644
--- a/drivers/mmc/host/wmt-sdmmc.c
+++ b/drivers/mmc/host/wmt-sdmmc.c
@@ -751,19 +751,16 @@ static int wmt_mci_probe(struct platform_device *pdev)
 	struct mmc_host *mmc;
 	struct wmt_mci_priv *priv;
 	struct device_node *np = pdev->dev.of_node;
-	const struct of_device_id *of_id =
-		of_match_device(wmt_mci_dt_ids, &pdev->dev);
 	const struct wmt_mci_caps *wmt_caps;
 	int ret;
 	int regular_irq, dma_irq;
 
-	if (!of_id || !of_id->data) {
+	wmt_caps = of_device_get_match_data(&pdev->dev);
+	if (!wmt_caps) {
 		dev_err(&pdev->dev, "Controller capabilities data missing\n");
 		return -EFAULT;
 	}
 
-	wmt_caps = of_id->data;
-
 	if (!np) {
 		dev_err(&pdev->dev, "Missing SDMMC description in devicetree\n");
 		return -EFAULT;