Merge tag 'mmc-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Fixup max_discard/trim calculations
   - Announce SD specs greater than 4.0
   - Add discard support for SD cards
   - Don't do retries for CMD6 (SWITCH command)
   - Various cleanups and re-structuring

  MMC host:
   - cqhci:
      * Add maintainers for eMMC CQHCI driver
   - sdhci:
      * Consolidate WP GPIO code
      * Add ADMA3 DMA support for V4 enabled host
      * Fixup card detect support in pci-o2micro driver
      * Add support for CMDQ and SDMMC pads auto-calibration in tegra
        driver
      * Add DCMD support and CMDQ support, support for i.MX6ULL variant,
        fixup HS400 timing issue and add HS400_ES support for i.MX8QXP
        to esdhc-imx driver
      * Avoid CRC errors by adjusting settings to speed mode and fixup
        card initialization for high speed mode in renesas_sdhi
      * Fixup timeout settings for omap
      * Enable 8 bits bus-width support in atmel-mci
      * Convert some legacy code in jz4740 driver to use modern APIs
      * Send a CMD12 to clear DPSM at errors for STM32 sdmmc mmci
        driver"

* tag 'mmc-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: (69 commits)
  mmc:fix a bug when max_discard is 0
  mmc: core: Add a debug print when the card may have been replaced
  mmc: core: Add sd discard timeout
  mmc: core: Add discard support to sd
  mmc: sdhci-esdhc-imx: clear the HALT bit when enable CQE
  mmc: core: do not retry CMD6 in __mmc_switch()
  mmc: core: Convert mmc_align_data_size() into an SDIO specific function
  mmc: core: Move mmc_of_parse_voltage() to host.c
  mmc: core: Convert mmc_regulator_get_ocrmask() to static
  mmc: core: Move regulator helpers to separate file
  mmc: of_mmc_spi: Convert to mmc_of_parse_voltage()
  mmc: core: Drop retries as in-parameter to mmc_wait_for_app_cmd()
  mmc: core: Convert mmc_wait_for_app_cmd() to static
  mmc: renesas_sdhi: Change HW adjustment register according to speed mode
  mmc: mmci: Send a CMD12 to clear the DPSM at errors
  mmc: sdhci-xenon: Fixup already marked switch fall-through
  mmc: sdhci-tegra: drop ->get_ro() implementation
  mmc: sdhci-omap: drop ->get_ro() implementation
  mmc: sdhci: use WP GPIO in sdhci_check_ro()
  mmc: wmt-sdmmc: Drop unused include
  ...

50 files changed, 1167 insertions, 648 deletions

diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile
index abba078f7f49..95ffe008ebdf 100644
--- a/drivers/mmc/core/Makefile
+++ b/drivers/mmc/core/Makefile
@@ -8,7 +8,7 @@ mmc_core-y			:= core.o bus.o host.o \
 				   mmc.o mmc_ops.o sd.o sd_ops.o \
 				   sdio.o sdio_ops.o sdio_bus.o \
 				   sdio_cis.o sdio_io.o sdio_irq.o \
-				   slot-gpio.o
+				   slot-gpio.o regulator.o
 mmc_core-$(CONFIG_OF)		+= pwrseq.o
 obj-$(CONFIG_PWRSEQ_SIMPLE)	+= pwrseq_simple.o
 obj-$(CONFIG_PWRSEQ_SD8787)	+= pwrseq_sd8787.o
diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 9ce8eb51a60f..2c71a434c915 100644
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -1124,7 +1124,7 @@ static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
 {
 	struct mmc_blk_data *md = mq->blkdata;
 	struct mmc_card *card = md->queue.card;
-	unsigned int from, nr, arg;
+	unsigned int from, nr;
 	int err = 0, type = MMC_BLK_DISCARD;
 	blk_status_t status = BLK_STS_OK;
 
@@ -1136,24 +1136,18 @@ static void mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
 	from = blk_rq_pos(req);
 	nr = blk_rq_sectors(req);
 
-	if (mmc_can_discard(card))
-		arg = MMC_DISCARD_ARG;
-	else if (mmc_can_trim(card))
-		arg = MMC_TRIM_ARG;
-	else
-		arg = MMC_ERASE_ARG;
 	do {
 		err = 0;
 		if (card->quirks & MMC_QUIRK_INAND_CMD38) {
 			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
 					 INAND_CMD38_ARG_EXT_CSD,
-					 arg == MMC_TRIM_ARG ?
+					 card->erase_arg == MMC_TRIM_ARG ?
 					 INAND_CMD38_ARG_TRIM :
 					 INAND_CMD38_ARG_ERASE,
 					 0);
 		}
 		if (!err)
-			err = mmc_erase(card, from, nr, arg);
+			err = mmc_erase(card, from, nr, card->erase_arg);
 	} while (err == -EIO && !mmc_blk_reset(md, card->host, type));
 	if (err)
 		status = BLK_STS_IOERR;
@@ -2768,8 +2762,8 @@ static int mmc_dbg_card_status_get(void *data, u64 *val)
 
 	return ret;
 }
-DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
-		NULL, "%08llx\n");
+DEFINE_DEBUGFS_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
+			 NULL, "%08llx\n");
 
 /* That is two digits * 512 + 1 for newline */
 #define EXT_CSD_STR_LEN 1025
@@ -2857,8 +2851,9 @@ static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
 
 	if (mmc_card_mmc(card) || mmc_card_sd(card)) {
 		md->status_dentry =
-			debugfs_create_file("status", S_IRUSR, root, card,
-					    &mmc_dbg_card_status_fops);
+			debugfs_create_file_unsafe("status", 0400, root,
+						   card,
+						   &mmc_dbg_card_status_fops);
 		if (!md->status_dentry)
 			return -EIO;
 	}
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index b27a1e620233..6db36dc870b5 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -21,7 +21,6 @@
 #include <linux/leds.h>
 #include <linux/scatterlist.h>
 #include <linux/log2.h>
-#include <linux/regulator/consumer.h>
 #include <linux/pm_runtime.h>
 #include <linux/pm_wakeup.h>
 #include <linux/suspend.h>
@@ -52,6 +51,7 @@
 
 /* The max erase timeout, used when host->max_busy_timeout isn't specified */
 #define MMC_ERASE_TIMEOUT_MS	(60 * 1000) /* 60 s */
+#define SD_DISCARD_TIMEOUT_MS	(250)
 
 static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
 
@@ -758,33 +758,6 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
 }
 EXPORT_SYMBOL(mmc_set_data_timeout);
 
-/**
- *	mmc_align_data_size - pads a transfer size to a more optimal value
- *	@card: the MMC card associated with the data transfer
- *	@sz: original transfer size
- *
- *	Pads the original data size with a number of extra bytes in
- *	order to avoid controller bugs and/or performance hits
- *	(e.g. some controllers revert to PIO for certain sizes).
- *
- *	Returns the improved size, which might be unmodified.
- *
- *	Note that this function is only relevant when issuing a
- *	single scatter gather entry.
- */
-unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz)
-{
-	/*
-	 * FIXME: We don't have a system for the controller to tell
-	 * the core about its problems yet, so for now we just 32-bit
-	 * align the size.
-	 */
-	sz = ((sz + 3) / 4) * 4;
-
-	return sz;
-}
-EXPORT_SYMBOL(mmc_align_data_size);
-
 /*
  * Allow claiming an already claimed host if the context is the same or there is
  * no context but the task is the same.
@@ -1112,55 +1085,6 @@ u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max)
 
 	return mask;
 }
-EXPORT_SYMBOL(mmc_vddrange_to_ocrmask);
-
-#ifdef CONFIG_OF
-
-/**
- * mmc_of_parse_voltage - return mask of supported voltages
- * @np: The device node need to be parsed.
- * @mask: mask of voltages available for MMC/SD/SDIO
- *
- * Parse the "voltage-ranges" DT property, returning zero if it is not
- * found, negative errno if the voltage-range specification is invalid,
- * or one if the voltage-range is specified and successfully parsed.
- */
-int mmc_of_parse_voltage(struct device_node *np, u32 *mask)
-{
-	const u32 *voltage_ranges;
-	int num_ranges, i;
-
-	voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges);
-	num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;
-	if (!voltage_ranges) {
-		pr_debug("%pOF: voltage-ranges unspecified\n", np);
-		return 0;
-	}
-	if (!num_ranges) {
-		pr_err("%pOF: voltage-ranges empty\n", np);
-		return -EINVAL;
-	}
-
-	for (i = 0; i < num_ranges; i++) {
-		const int j = i * 2;
-		u32 ocr_mask;
-
-		ocr_mask = mmc_vddrange_to_ocrmask(
-				be32_to_cpu(voltage_ranges[j]),
-				be32_to_cpu(voltage_ranges[j + 1]));
-		if (!ocr_mask) {
-			pr_err("%pOF: voltage-range #%d is invalid\n",
-				np, i);
-			return -EINVAL;
-		}
-		*mask |= ocr_mask;
-	}
-
-	return 1;
-}
-EXPORT_SYMBOL(mmc_of_parse_voltage);
-
-#endif /* CONFIG_OF */
 
 static int mmc_of_get_func_num(struct device_node *node)
 {
@@ -1190,246 +1114,6 @@ struct device_node *mmc_of_find_child_device(struct mmc_host *host,
 	return NULL;
 }
 
-#ifdef CONFIG_REGULATOR
-
-/**
- * mmc_ocrbitnum_to_vdd - Convert a OCR bit number to its voltage
- * @vdd_bit:	OCR bit number
- * @min_uV:	minimum voltage value (mV)
- * @max_uV:	maximum voltage value (mV)
- *
- * This function returns the voltage range according to the provided OCR
- * bit number. If conversion is not possible a negative errno value returned.
- */
-static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV)
-{
-	int		tmp;
-
-	if (!vdd_bit)
-		return -EINVAL;
-
-	/*
-	 * REVISIT mmc_vddrange_to_ocrmask() may have set some
-	 * bits this regulator doesn't quite support ... don't
-	 * be too picky, most cards and regulators are OK with
-	 * a 0.1V range goof (it's a small error percentage).
-	 */
-	tmp = vdd_bit - ilog2(MMC_VDD_165_195);
-	if (tmp == 0) {
-		*min_uV = 1650 * 1000;
-		*max_uV = 1950 * 1000;
-	} else {
-		*min_uV = 1900 * 1000 + tmp * 100 * 1000;
-		*max_uV = *min_uV + 100 * 1000;
-	}
-
-	return 0;
-}
-
-/**
- * mmc_regulator_get_ocrmask - return mask of supported voltages
- * @supply: regulator to use
- *
- * This returns either a negative errno, or a mask of voltages that
- * can be provided to MMC/SD/SDIO devices using the specified voltage
- * regulator.  This would normally be called before registering the
- * MMC host adapter.
- */
-int mmc_regulator_get_ocrmask(struct regulator *supply)
-{
-	int			result = 0;
-	int			count;
-	int			i;
-	int			vdd_uV;
-	int			vdd_mV;
-
-	count = regulator_count_voltages(supply);
-	if (count < 0)
-		return count;
-
-	for (i = 0; i < count; i++) {
-		vdd_uV = regulator_list_voltage(supply, i);
-		if (vdd_uV <= 0)
-			continue;
-
-		vdd_mV = vdd_uV / 1000;
-		result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
-	}
-
-	if (!result) {
-		vdd_uV = regulator_get_voltage(supply);
-		if (vdd_uV <= 0)
-			return vdd_uV;
-
-		vdd_mV = vdd_uV / 1000;
-		result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
-	}
-
-	return result;
-}
-EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask);
-
-/**
- * mmc_regulator_set_ocr - set regulator to match host->ios voltage
- * @mmc: the host to regulate
- * @supply: regulator to use
- * @vdd_bit: zero for power off, else a bit number (host->ios.vdd)
- *
- * Returns zero on success, else negative errno.
- *
- * MMC host drivers may use this to enable or disable a regulator using
- * a particular supply voltage.  This would normally be called from the
- * set_ios() method.
- */
-int mmc_regulator_set_ocr(struct mmc_host *mmc,
-			struct regulator *supply,
-			unsigned short vdd_bit)
-{
-	int			result = 0;
-	int			min_uV, max_uV;
-
-	if (vdd_bit) {
-		mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV);
-
-		result = regulator_set_voltage(supply, min_uV, max_uV);
-		if (result == 0 && !mmc->regulator_enabled) {
-			result = regulator_enable(supply);
-			if (!result)
-				mmc->regulator_enabled = true;
-		}
-	} else if (mmc->regulator_enabled) {
-		result = regulator_disable(supply);
-		if (result == 0)
-			mmc->regulator_enabled = false;
-	}
-
-	if (result)
-		dev_err(mmc_dev(mmc),
-			"could not set regulator OCR (%d)\n", result);
-	return result;
-}
-EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr);
-
-static int mmc_regulator_set_voltage_if_supported(struct regulator *regulator,
-						  int min_uV, int target_uV,
-						  int max_uV)
-{
-	/*
-	 * Check if supported first to avoid errors since we may try several
-	 * signal levels during power up and don't want to show errors.
-	 */
-	if (!regulator_is_supported_voltage(regulator, min_uV, max_uV))
-		return -EINVAL;
-
-	return regulator_set_voltage_triplet(regulator, min_uV, target_uV,
-					     max_uV);
-}
-
-/**
- * mmc_regulator_set_vqmmc - Set VQMMC as per the ios
- *
- * For 3.3V signaling, we try to match VQMMC to VMMC as closely as possible.
- * That will match the behavior of old boards where VQMMC and VMMC were supplied
- * by the same supply.  The Bus Operating conditions for 3.3V signaling in the
- * SD card spec also define VQMMC in terms of VMMC.
- * If this is not possible we'll try the full 2.7-3.6V of the spec.
- *
- * For 1.2V and 1.8V signaling we'll try to get as close as possible to the
- * requested voltage.  This is definitely a good idea for UHS where there's a
- * separate regulator on the card that's trying to make 1.8V and it's best if
- * we match.
- *
- * This function is expected to be used by a controller's
- * start_signal_voltage_switch() function.
- */
-int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios)
-{
-	struct device *dev = mmc_dev(mmc);
-	int ret, volt, min_uV, max_uV;
-
-	/* If no vqmmc supply then we can't change the voltage */
-	if (IS_ERR(mmc->supply.vqmmc))
-		return -EINVAL;
-
-	switch (ios->signal_voltage) {
-	case MMC_SIGNAL_VOLTAGE_120:
-		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
-						1100000, 1200000, 1300000);
-	case MMC_SIGNAL_VOLTAGE_180:
-		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
-						1700000, 1800000, 1950000);
-	case MMC_SIGNAL_VOLTAGE_330:
-		ret = mmc_ocrbitnum_to_vdd(mmc->ios.vdd, &volt, &max_uV);
-		if (ret < 0)
-			return ret;
-
-		dev_dbg(dev, "%s: found vmmc voltage range of %d-%duV\n",
-			__func__, volt, max_uV);
-
-		min_uV = max(volt - 300000, 2700000);
-		max_uV = min(max_uV + 200000, 3600000);
-
-		/*
-		 * Due to a limitation in the current implementation of
-		 * regulator_set_voltage_triplet() which is taking the lowest
-		 * voltage possible if below the target, search for a suitable
-		 * voltage in two steps and try to stay close to vmmc
-		 * with a 0.3V tolerance at first.
-		 */
-		if (!mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
-						min_uV, volt, max_uV))
-			return 0;
-
-		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
-						2700000, volt, 3600000);
-	default:
-		return -EINVAL;
-	}
-}
-EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc);
-
-#endif /* CONFIG_REGULATOR */
-
-/**
- * mmc_regulator_get_supply - try to get VMMC and VQMMC regulators for a host
- * @mmc: the host to regulate
- *
- * Returns 0 or errno. errno should be handled, it is either a critical error
- * or -EPROBE_DEFER. 0 means no critical error but it does not mean all
- * regulators have been found because they all are optional. If you require
- * certain regulators, you need to check separately in your driver if they got
- * populated after calling this function.
- */
-int mmc_regulator_get_supply(struct mmc_host *mmc)
-{
-	struct device *dev = mmc_dev(mmc);
-	int ret;
-
-	mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc");
-	mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc");
-
-	if (IS_ERR(mmc->supply.vmmc)) {
-		if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
-		dev_dbg(dev, "No vmmc regulator found\n");
-	} else {
-		ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc);
-		if (ret > 0)
-			mmc->ocr_avail = ret;
-		else
-			dev_warn(dev, "Failed getting OCR mask: %d\n", ret);
-	}
-
-	if (IS_ERR(mmc->supply.vqmmc)) {
-		if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
-		dev_dbg(dev, "No vqmmc regulator found\n");
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(mmc_regulator_get_supply);
-
 /*
  * Mask off any voltages we don't support and select
  * the lowest voltage
@@ -1936,6 +1620,12 @@ static unsigned int mmc_sd_erase_timeout(struct mmc_card *card,
 {
 	unsigned int erase_timeout;
 
+	/* for DISCARD none of the below calculation applies.
+	 * the busy timeout is 250msec per discard command.
+	 */
+	if (arg == SD_DISCARD_ARG)
+		return SD_DISCARD_TIMEOUT_MS;
+
 	if (card->ssr.erase_timeout) {
 		/* Erase timeout specified in SD Status Register (SSR) */
 		erase_timeout = card->ssr.erase_timeout * qty +
@@ -2164,7 +1854,7 @@ static unsigned int mmc_align_erase_size(struct mmc_card *card,
  * @card: card to erase
  * @from: first sector to erase
  * @nr: number of sectors to erase
- * @arg: erase command argument (SD supports only %MMC_ERASE_ARG)
+ * @arg: erase command argument
  *
  * Caller must claim host before calling this function.
  */
@@ -2181,14 +1871,14 @@ int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
 	if (!card->erase_size)
 		return -EOPNOTSUPP;
 
-	if (mmc_card_sd(card) && arg != MMC_ERASE_ARG)
+	if (mmc_card_sd(card) && arg != SD_ERASE_ARG && arg != SD_DISCARD_ARG)
 		return -EOPNOTSUPP;
 
-	if ((arg & MMC_SECURE_ARGS) &&
+	if (mmc_card_mmc(card) && (arg & MMC_SECURE_ARGS) &&
 	    !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN))
 		return -EOPNOTSUPP;
 
-	if ((arg & MMC_TRIM_ARGS) &&
+	if (mmc_card_mmc(card) && (arg & MMC_TRIM_ARGS) &&
 	    !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
 		return -EOPNOTSUPP;
 
@@ -2381,9 +2071,9 @@ unsigned int mmc_calc_max_discard(struct mmc_card *card)
 		return card->pref_erase;
 
 	max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG);
-	if (max_discard && mmc_can_trim(card)) {
+	if (mmc_can_trim(card)) {
 		max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG);
-		if (max_trim < max_discard)
+		if (max_trim < max_discard || max_discard == 0)
 			max_discard = max_trim;
 	} else if (max_discard < card->erase_size) {
 		max_discard = 0;
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index 8fb6bc37f808..b5083b13d594 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -59,6 +59,7 @@ void mmc_power_up(struct mmc_host *host, u32 ocr);
 void mmc_power_off(struct mmc_host *host);
 void mmc_power_cycle(struct mmc_host *host, u32 ocr);
 void mmc_set_initial_state(struct mmc_host *host);
+u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max);
 
 static inline void mmc_delay(unsigned int ms)
 {
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index cf58ccaf22d5..3a4402a79904 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -194,7 +194,7 @@ int mmc_of_parse(struct mmc_host *host)
 	switch (bus_width) {
 	case 8:
 		host->caps |= MMC_CAP_8_BIT_DATA;
-		/* Hosts capable of 8-bit transfers can also do 4 bits */
+		/* fall through - Hosts capable of 8-bit can also do 4 bits */
 	case 4:
 		host->caps |= MMC_CAP_4_BIT_DATA;
 		break;
@@ -260,7 +260,7 @@ int mmc_of_parse(struct mmc_host *host)
 	/* Parse Write Protection */
 	ro_cap_invert = device_property_read_bool(dev, "wp-inverted");
 
-	ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0, &ro_gpio_invert);
+	ret = mmc_gpiod_request_ro(host, "wp", 0, 0, &ro_gpio_invert);
 	if (!ret)
 		dev_info(host->parent, "Got WP GPIO\n");
 	else if (ret != -ENOENT && ret != -ENOSYS)
@@ -349,6 +349,50 @@ int mmc_of_parse(struct mmc_host *host)
 EXPORT_SYMBOL(mmc_of_parse);
 
 /**
+ * mmc_of_parse_voltage - return mask of supported voltages
+ * @np: The device node need to be parsed.
+ * @mask: mask of voltages available for MMC/SD/SDIO
+ *
+ * Parse the "voltage-ranges" DT property, returning zero if it is not
+ * found, negative errno if the voltage-range specification is invalid,
+ * or one if the voltage-range is specified and successfully parsed.
+ */
+int mmc_of_parse_voltage(struct device_node *np, u32 *mask)
+{
+	const u32 *voltage_ranges;
+	int num_ranges, i;
+
+	voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges);
+	num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;
+	if (!voltage_ranges) {
+		pr_debug("%pOF: voltage-ranges unspecified\n", np);
+		return 0;
+	}
+	if (!num_ranges) {
+		pr_err("%pOF: voltage-ranges empty\n", np);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < num_ranges; i++) {
+		const int j = i * 2;
+		u32 ocr_mask;
+
+		ocr_mask = mmc_vddrange_to_ocrmask(
+				be32_to_cpu(voltage_ranges[j]),
+				be32_to_cpu(voltage_ranges[j + 1]));
+		if (!ocr_mask) {
+			pr_err("%pOF: voltage-range #%d is invalid\n",
+				np, i);
+			return -EINVAL;
+		}
+		*mask |= ocr_mask;
+	}
+
+	return 1;
+}
+EXPORT_SYMBOL(mmc_of_parse_voltage);
+
+/**
  *	mmc_alloc_host - initialise the per-host structure.
  *	@extra: sizeof private data structure
  *	@dev: pointer to host device model structure
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index da892a599524..3e786ba204c3 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1594,6 +1594,8 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 
 	if (oldcard) {
 		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
+			pr_debug("%s: Perhaps the card was replaced\n",
+				mmc_hostname(host));
 			err = -ENOENT;
 			goto err;
 		}
@@ -1743,6 +1745,14 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 			card->ext_csd.power_off_notification = EXT_CSD_POWER_ON;
 	}
 
+	/* set erase_arg */
+	if (mmc_can_discard(card))
+		card->erase_arg = MMC_DISCARD_ARG;
+	else if (mmc_can_trim(card))
+		card->erase_arg = MMC_TRIM_ARG;
+	else
+		card->erase_arg = MMC_ERASE_ARG;
+
 	/*
 	 * Select timing interface
 	 */
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
index 9054329fe903..c5208fb312ae 100644
--- a/drivers/mmc/core/mmc_ops.c
+++ b/drivers/mmc/core/mmc_ops.c
@@ -562,7 +562,7 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
 	if (index == EXT_CSD_SANITIZE_START)
 		cmd.sanitize_busy = true;
 
-	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+	err = mmc_wait_for_cmd(host, &cmd, 0);
 	if (err)
 		goto out;
 
diff --git a/drivers/mmc/core/regulator.c b/drivers/mmc/core/regulator.c
new file mode 100644
index 000000000000..b6febbcf8978
--- /dev/null
+++ b/drivers/mmc/core/regulator.c
@@ -0,0 +1,260 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Helper functions for MMC regulators.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/log2.h>
+#include <linux/regulator/consumer.h>
+
+#include <linux/mmc/host.h>
+
+#include "core.h"
+#include "host.h"
+
+#ifdef CONFIG_REGULATOR
+
+/**
+ * mmc_ocrbitnum_to_vdd - Convert a OCR bit number to its voltage
+ * @vdd_bit:	OCR bit number
+ * @min_uV:	minimum voltage value (mV)
+ * @max_uV:	maximum voltage value (mV)
+ *
+ * This function returns the voltage range according to the provided OCR
+ * bit number. If conversion is not possible a negative errno value returned.
+ */
+static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV)
+{
+	int		tmp;
+
+	if (!vdd_bit)
+		return -EINVAL;
+
+	/*
+	 * REVISIT mmc_vddrange_to_ocrmask() may have set some
+	 * bits this regulator doesn't quite support ... don't
+	 * be too picky, most cards and regulators are OK with
+	 * a 0.1V range goof (it's a small error percentage).
+	 */
+	tmp = vdd_bit - ilog2(MMC_VDD_165_195);
+	if (tmp == 0) {
+		*min_uV = 1650 * 1000;
+		*max_uV =