Merge tag 'mmc-v3.16-1' of git://git.linaro.org/people/ulf.hansson/mmc into next

Pull MMC update from Ulf Hansson:
 "These patches are mainly updates for the mmci driver and have been
  tested in linux-next.

  Some ARM SoC related patches are also included and those have been
  acked from the corresponding maintainers to go through my mmc tree.

  Updates for mmci driver:
   - Put the device into low power state at system suspend.
   - Convert to the common mmc DT parser.
   - Add missing DT bindings needed for ux500.

  Updates for ARM ux500|u300:
   - Convert to the common mmc DT bindings.
   - Remove redundant board file for mmci platform data"

* tag 'mmc-v3.16-1' of git://git.linaro.org/people/ulf.hansson/mmc: (22 commits)
  mmc: mmci: Enforce DMA configuration through DT
  mmc: mmci: Enforce max frequency configuration through DT
  mmc: mmci: Enforce mmc capabilities through DT
  mmc: mmci: Enforce DT for signal direction and feedback clock
  ARM: ux500: Remove redundant board file for mmci platform data
  ARM: ux500: Add a vmmc regulator through DT for the poped eMMC for href
  ARM: ux500: Add the mmc capabilities flags to DT
  mmc: mmci: Enable MMC_CAP_CMD23
  mmc: mmci: Mark the DT bindings for highspeed mode as deprecated
  ARM: u300: Convert to the common mmc DT bindings for highspeed mode
  ARM: nomadik: Convert to the common mmc DT bindings for highspeed mode
  ARM: ux500: Convert to the common mmc DT bindings for highspeed mode
  ARM: ux500: Add mmci signal directions and feeback clock in DT for href
  mmc: mmci: Use the common mmc DT parser
  mmc: mmci: Add DT bindings for feedback clock pin
  mmc: mmci: Add DT bindings for signal direction
  mmc: mmci: Update DT documentation
  mmc: mmci: Convert to devm functions
  mmc: mmci: Convert to the mmc gpio API
  mmc: mmci: Put the device into low power state at system suspend
  ...

2 files changed, 94 insertions, 244 deletions

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 771c60ab4a3..a084edd37af 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -13,6 +13,7 @@
 #include <linux/init.h>
 #include <linux/ioport.h>
 #include <linux/device.h>
+#include <linux/io.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
@@ -23,6 +24,7 @@
 #include <linux/mmc/pm.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/card.h>
+#include <linux/mmc/slot-gpio.h>
 #include <linux/amba/bus.h>
 #include <linux/clk.h>
 #include <linux/scatterlist.h>
@@ -364,7 +366,6 @@ static void mmci_init_sg(struct mmci_host *host, struct mmc_data *data)
 #ifdef CONFIG_DMA_ENGINE
 static void mmci_dma_setup(struct mmci_host *host)
 {
-	struct mmci_platform_data *plat = host->plat;
 	const char *rxname, *txname;
 	dma_cap_mask_t mask;
 
@@ -378,25 +379,6 @@ static void mmci_dma_setup(struct mmci_host *host)
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
 
-	if (plat && plat->dma_filter) {
-		if (!host->dma_rx_channel && plat->dma_rx_param) {
-			host->dma_rx_channel = dma_request_channel(mask,
-							   plat->dma_filter,
-							   plat->dma_rx_param);
-			/* E.g if no DMA hardware is present */
-			if (!host->dma_rx_channel)
-				dev_err(mmc_dev(host->mmc), "no RX DMA channel\n");
-		}
-
-		if (!host->dma_tx_channel && plat->dma_tx_param) {
-			host->dma_tx_channel = dma_request_channel(mask,
-							   plat->dma_filter,
-							   plat->dma_tx_param);
-			if (!host->dma_tx_channel)
-				dev_warn(mmc_dev(host->mmc), "no TX DMA channel\n");
-		}
-	}
-
 	/*
 	 * If only an RX channel is specified, the driver will
 	 * attempt to use it bidirectionally, however if it is
@@ -444,11 +426,9 @@ static void mmci_dma_setup(struct mmci_host *host)
  */
 static inline void mmci_dma_release(struct mmci_host *host)
 {
-	struct mmci_platform_data *plat = host->plat;
-
 	if (host->dma_rx_channel)
 		dma_release_channel(host->dma_rx_channel);
-	if (host->dma_tx_channel && plat->dma_tx_param)
+	if (host->dma_tx_channel)
 		dma_release_channel(host->dma_tx_channel);
 	host->dma_rx_channel = host->dma_tx_channel = NULL;
 }
@@ -1285,7 +1265,7 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		 * indicating signal direction for the signals in
 		 * the SD/MMC bus and feedback-clock usage.
 		 */
-		pwr |= host->plat->sigdir;
+		pwr |= host->pwr_reg_add;
 
 		if (ios->bus_width == MMC_BUS_WIDTH_4)
 			pwr &= ~MCI_ST_DATA74DIREN;
@@ -1326,35 +1306,18 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	pm_runtime_put_autosuspend(mmc_dev(mmc));
 }
 
-static int mmci_get_ro(struct mmc_host *mmc)
-{
-	struct mmci_host *host = mmc_priv(mmc);
-
-	if (host->gpio_wp == -ENOSYS)
-		return -ENOSYS;
-
-	return gpio_get_value_cansleep(host->gpio_wp);
-}
-
 static int mmci_get_cd(struct mmc_host *mmc)
 {
 	struct mmci_host *host = mmc_priv(mmc);
 	struct mmci_platform_data *plat = host->plat;
-	unsigned int status;
+	unsigned int status = mmc_gpio_get_cd(mmc);
 
-	if (host->gpio_cd == -ENOSYS) {
+	if (status == -ENOSYS) {
 		if (!plat->status)
 			return 1; /* Assume always present */
 
 		status = plat->status(mmc_dev(host->mmc));
-	} else
-		status = !!gpio_get_value_cansleep(host->gpio_cd)
-			^ plat->cd_invert;
-
-	/*
-	 * Use positive logic throughout - status is zero for no card,
-	 * non-zero for card inserted.
-	 */
+	}
 	return status;
 }
 
@@ -1391,70 +1354,44 @@ static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios)
 	return ret;
 }
 
-static irqreturn_t mmci_cd_irq(int irq, void *dev_id)
-{
-	struct mmci_host *host = dev_id;
-
-	mmc_detect_change(host->mmc, msecs_to_jiffies(500));
-
-	return IRQ_HANDLED;
-}
-
 static struct mmc_host_ops mmci_ops = {
 	.request	= mmci_request,
 	.pre_req	= mmci_pre_request,
 	.post_req	= mmci_post_request,
 	.set_ios	= mmci_set_ios,
-	.get_ro		= mmci_get_ro,
+	.get_ro		= mmc_gpio_get_ro,
 	.get_cd		= mmci_get_cd,
 	.start_signal_voltage_switch = mmci_sig_volt_switch,
 };
 
-#ifdef CONFIG_OF
-static void mmci_dt_populate_generic_pdata(struct device_node *np,
-					struct mmci_platform_data *pdata)
+static int mmci_of_parse(struct device_node *np, struct mmc_host *mmc)
 {
-	int bus_width = 0;
-
-	pdata->gpio_wp = of_get_named_gpio(np, "wp-gpios", 0);
-	pdata->gpio_cd = of_get_named_gpio(np, "cd-gpios", 0);
+	struct mmci_host *host = mmc_priv(mmc);
+	int ret = mmc_of_parse(mmc);
 
-	if (of_get_property(np, "cd-inverted", NULL))
-		pdata->cd_invert = true;
-	else
-		pdata->cd_invert = false;
+	if (ret)
+		return ret;
 
-	of_property_read_u32(np, "max-frequency", &pdata->f_max);
-	if (!pdata->f_max)
-		pr_warn("%s has no 'max-frequency' property\n", np->full_name);
+	if (of_get_property(np, "st,sig-dir-dat0", NULL))
+		host->pwr_reg_add |= MCI_ST_DATA0DIREN;
+	if (of_get_property(np, "st,sig-dir-dat2", NULL))
+		host->pwr_reg_add |= MCI_ST_DATA2DIREN;
+	if (of_get_property(np, "st,sig-dir-dat31", NULL))
+		host->pwr_reg_add |= MCI_ST_DATA31DIREN;
+	if (of_get_property(np, "st,sig-dir-dat74", NULL))
+		host->pwr_reg_add |= MCI_ST_DATA74DIREN;
+	if (of_get_property(np, "st,sig-dir-cmd", NULL))
+		host->pwr_reg_add |= MCI_ST_CMDDIREN;
+	if (of_get_property(np, "st,sig-pin-fbclk", NULL))
+		host->pwr_reg_add |= MCI_ST_FBCLKEN;
 
 	if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL))
-		pdata->capabilities |= MMC_CAP_MMC_HIGHSPEED;
+		mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
 	if (of_get_property(np, "mmc-cap-sd-highspeed", NULL))
-		pdata->capabilities |= MMC_CAP_SD_HIGHSPEED;
+		mmc->caps |= MMC_CAP_SD_HIGHSPEED;
 
-	of_property_read_u32(np, "bus-width", &bus_width);
-	switch (bus_width) {
-	case 0 :
-		/* No bus-width supplied. */
-		break;
-	case 4 :
-		pdata->capabilities |= MMC_CAP_4_BIT_DATA;
-		break;
-	case 8 :
-		pdata->capabilities |= MMC_CAP_8_BIT_DATA;
-		break;
-	default :
-		pr_warn("%s: Unsupported bus width\n", np->full_name);
-	}
-}
-#else
-static void mmci_dt_populate_generic_pdata(struct device_node *np,
-					struct mmci_platform_data *pdata)
-{
-	return;
+	return 0;
 }
-#endif
 
 static int mmci_probe(struct amba_device *dev,
 	const struct amba_id *id)
@@ -1478,26 +1415,17 @@ static int mmci_probe(struct amba_device *dev,
 			return -ENOMEM;
 	}
 
-	if (np)
-		mmci_dt_populate_generic_pdata(np, plat);
+	mmc = mmc_alloc_host(sizeof(struct mmci_host), &dev->dev);
+	if (!mmc)
+		return -ENOMEM;
 
-	ret = amba_request_regions(dev, DRIVER_NAME);
+	ret = mmci_of_parse(np, mmc);
 	if (ret)
-		goto out;
-
-	mmc = mmc_alloc_host(sizeof(struct mmci_host), &dev->dev);
-	if (!mmc) {
-		ret = -ENOMEM;
-		goto rel_regions;
-	}
+		goto host_free;
 
 	host = mmc_priv(mmc);
 	host->mmc = mmc;
 
-	host->gpio_wp = -ENOSYS;
-	host->gpio_cd = -ENOSYS;
-	host->gpio_cd_irq = -1;
-
 	host->hw_designer = amba_manf(dev);
 	host->hw_revision = amba_rev(dev);
 	dev_dbg(mmc_dev(mmc), "designer ID = 0x%02x\n", host->hw_designer);
@@ -1529,10 +1457,11 @@ static int mmci_probe(struct amba_device *dev,
 		dev_dbg(mmc_dev(mmc), "eventual mclk rate: %u Hz\n",
 			host->mclk);
 	}
+
 	host->phybase = dev->res.start;
-	host->base = ioremap(dev->res.start, resource_size(&dev->res));
-	if (!host->base) {
-		ret = -ENOMEM;
+	host->base = devm_ioremap_resource(&dev->dev, &dev->res);
+	if (IS_ERR(host->base)) {
+		ret = PTR_ERR(host->base);
 		goto clk_disable;
 	}
 
@@ -1546,15 +1475,13 @@ static int mmci_probe(struct amba_device *dev,
 	else
 		mmc->f_min = DIV_ROUND_UP(host->mclk, 512);
 	/*
-	 * If the platform data supplies a maximum operating
-	 * frequency, this takes precedence. Else, we fall back
-	 * to using the module parameter, which has a (low)
-	 * default value in case it is not specified. Either
-	 * value must not exceed the clock rate into the block,
-	 * of course.
+	 * If no maximum operating frequency is supplied, fall back to use
+	 * the module parameter, which has a (low) default value in case it
+	 * is not specified. Either value must not exceed the clock rate into
+	 * the block, of course.
 	 */
-	if (plat->f_max)
-		mmc->f_max = min(host->mclk, plat->f_max);
+	if (mmc->f_max)
+		mmc->f_max = min(host->mclk, mmc->f_max);
 	else
 		mmc->f_max = min(host->mclk, fmax);
 	dev_dbg(mmc_dev(mmc), "clocking block at %u Hz\n", mmc->f_max);
@@ -1566,8 +1493,15 @@ static int mmci_probe(struct amba_device *dev,
 	else if (plat->ocr_mask)
 		dev_warn(mmc_dev(mmc), "Platform OCR mask is ignored\n");
 
-	mmc->caps = plat->capabilities;
-	mmc->caps2 = plat->capabilities2;
+	/* DT takes precedence over platform data. */
+	if (!np) {
+		if (!plat->cd_invert)
+			mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
+		mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
+	}
+
+	/* We support these capabilities. */
+	mmc->caps |= MMC_CAP_CMD23;
 
 	if (variant->busy_detect) {
 		mmci_ops.card_busy = mmci_card_busy;
@@ -1579,7 +1513,7 @@ static int mmci_probe(struct amba_device *dev,
 	mmc->ops = &mmci_ops;
 
 	/* We support these PM capabilities. */
-	mmc->pm_caps = MMC_PM_KEEP_POWER;
+	mmc->pm_caps |= MMC_PM_KEEP_POWER;
 
 	/*
 	 * We can do SGIO
@@ -1616,62 +1550,30 @@ static int mmci_probe(struct amba_device *dev,
 	writel(0, host->base + MMCIMASK1);
 	writel(0xfff, host->base + MMCICLEAR);
 
-	if (plat->gpio_cd == -EPROBE_DEFER) {
-		ret = -EPROBE_DEFER;
-		goto err_gpio_cd;
-	}
-	if (gpio_is_valid(plat->gpio_cd)) {
-		ret = gpio_request(plat->gpio_cd, DRIVER_NAME " (cd)");
-		if (ret == 0)
-			ret = gpio_direction_input(plat->gpio_cd);
-		if (ret == 0)
-			host->gpio_cd = plat->gpio_cd;
-		else if (ret != -ENOSYS)
-			goto err_gpio_cd;
-
-		/*
-		 * A gpio pin that will detect cards when inserted and removed
-		 * will most likely want to trigger on the edges if it is
-		 * 0 when ejected and 1 when inserted (or mutatis mutandis
-		 * for the inverted case) so we request triggers on both
-		 * edges.
-		 */
-		ret = request_any_context_irq(gpio_to_irq(plat->gpio_cd),
-				mmci_cd_irq,
-				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
-				DRIVER_NAME " (cd)", host);
-		if (ret >= 0)
-			host->gpio_cd_irq = gpio_to_irq(plat->gpio_cd);
-	}
-	if (plat->gpio_wp == -EPROBE_DEFER) {
-		ret = -EPROBE_DEFER;
-		goto err_gpio_wp;
+	/* If DT, cd/wp gpios must be supplied through it. */
+	if (!np && gpio_is_valid(plat->gpio_cd)) {
+		ret = mmc_gpio_request_cd(mmc, plat->gpio_cd, 0);
+		if (ret)
+			goto clk_disable;
 	}
-	if (gpio_is_valid(plat->gpio_wp)) {
-		ret = gpio_request(plat->gpio_wp, DRIVER_NAME " (wp)");
-		if (ret == 0)
-			ret = gpio_direction_input(plat->gpio_wp);
-		if (ret == 0)
-			host->gpio_wp = plat->gpio_wp;
-		else if (ret != -ENOSYS)
-			goto err_gpio_wp;
+	if (!np && gpio_is_valid(plat->gpio_wp)) {
+		ret = mmc_gpio_request_ro(mmc, plat->gpio_wp);
+		if (ret)
+			goto clk_disable;
 	}
 
-	if ((host->plat->status || host->gpio_cd != -ENOSYS)
-	    && host->gpio_cd_irq < 0)
-		mmc->caps |= MMC_CAP_NEEDS_POLL;
-
-	ret = request_irq(dev->irq[0], mmci_irq, IRQF_SHARED, DRIVER_NAME " (cmd)", host);
+	ret = devm_request_irq(&dev->dev, dev->irq[0], mmci_irq, IRQF_SHARED,
+			DRIVER_NAME " (cmd)", host);
 	if (ret)
-		goto unmap;
+		goto clk_disable;
 
 	if (!dev->irq[1])
 		host->singleirq = true;
 	else {
-		ret = request_irq(dev->irq[1], mmci_pio_irq, IRQF_SHARED,
-				  DRIVER_NAME " (pio)", host);
+		ret = devm_request_irq(&dev->dev, dev->irq[1], mmci_pio_irq,
+				IRQF_SHARED, DRIVER_NAME " (pio)", host);
 		if (ret)
-			goto irq0_free;
+			goto clk_disable;
 	}
 
 	writel(MCI_IRQENABLE, host->base + MMCIMASK0);
@@ -1693,25 +1595,10 @@ static int mmci_probe(struct amba_device *dev,
 
 	return 0;
 
- irq0_free:
-	free_irq(dev->irq[0], host);
- unmap:
-	if (host->gpio_wp != -ENOSYS)
-		gpio_free(host->gpio_wp);
- err_gpio_wp:
-	if (host->gpio_cd_irq >= 0)
-		free_irq(host->gpio_cd_irq, host);
-	if (host->gpio_cd != -ENOSYS)
-		gpio_free(host->gpio_cd);
- err_gpio_cd:
-	iounmap(host->base);
  clk_disable:
 	clk_disable_unprepare(host->clk);
  host_free:
 	mmc_free_host(mmc);
- rel_regions:
-	amba_release_regions(dev);
- out:
 	return ret;
 }
 
@@ -1737,92 +1624,46 @@ static int mmci_remove(struct amba_device *dev)
 		writel(0, host->base + MMCIDATACTRL);
 
 		mmci_dma_release(host);
-		free_irq(dev->irq[0], host);
-		if (!host->singleirq)
-			free_irq(dev->irq[1], host);
-
-		if (host->gpio_wp != -ENOSYS)
-			gpio_free(host->gpio_wp);
-		if (host->gpio_cd_irq >= 0)
-			free_irq(host->gpio_cd_irq, host);
-		if (host->gpio_cd != -ENOSYS)
-			gpio_free(host->gpio_cd);
-
-		iounmap(host->base);
 		clk_disable_unprepare(host->clk);
-
 		mmc_free_host(mmc);
-
-		amba_release_regions(dev);
-	}
-
-	return 0;
-}
-
-#ifdef CONFIG_SUSPEND
-static int mmci_suspend(struct device *dev)
-{
-	struct amba_device *adev = to_amba_device(dev);
-	struct mmc_host *mmc = amba_get_drvdata(adev);
-
-	if (mmc) {
-		struct mmci_host *host = mmc_priv(mmc);
-		pm_runtime_get_sync(dev);
-		writel(0, host->base + MMCIMASK0);
 	}
 
 	return 0;
 }
 
-static int mmci_resume(struct device *dev)
-{
-	struct amba_device *adev = to_amba_device(dev);
-	struct mmc_host *mmc = amba_get_drvdata(adev);
-
-	if (mmc) {
-		struct mmci_host *host = mmc_priv(mmc);
-		writel(MCI_IRQENABLE, host->base + MMCIMASK0);
-		pm_runtime_put(dev);
-	}
-
-	return 0;
-}
-#endif
-
-#ifdef CONFIG_PM_RUNTIME
+#ifdef CONFIG_PM
 static void mmci_save(struct mmci_host *host)
 {
 	unsigned long flags;
 
-	if (host->variant->pwrreg_nopower) {
-		spin_lock_irqsave(&host->lock, flags);
+	spin_lock_irqsave(&host->lock, flags);
 
-		writel(0, host->base + MMCIMASK0);
+	writel(0, host->base + MMCIMASK0);
+	if (host->variant->pwrreg_nopower) {
 		writel(0, host->base + MMCIDATACTRL);
 		writel(0, host->base + MMCIPOWER);
 		writel(0, host->base + MMCICLOCK);
-		mmci_reg_delay(host);
-
-		spin_unlock_irqrestore(&host->lock, flags);
 	}
+	mmci_reg_delay(host);
 
+	spin_unlock_irqrestore(&host->lock, flags);
 }
 
 static void mmci_restore(struct mmci_host *host)
 {
 	unsigned long flags;
 
-	if (host->variant->pwrreg_nopower) {
-		spin_lock_irqsave(&host->lock, flags);
+	spin_lock_irqsave(&host->lock, flags);
 
+	if (host->variant->pwrreg_nopower) {
 		writel(host->clk_reg, host->base + MMCICLOCK);
 		writel(host->datactrl_reg, host->base + MMCIDATACTRL);
 		writel(host->pwr_reg, host->base + MMCIPOWER);
-		writel(MCI_IRQENABLE, host->base + MMCIMASK0);
-		mmci_reg_delay(host);
-
-		spin_unlock_irqrestore(&host->lock, flags);
 	}
+	writel(MCI_IRQENABLE, host->base + MMCIMASK0);
+	mmci_reg_delay(host);
+
+	spin_unlock_irqrestore(&host->lock, flags);
 }
 
 static int mmci_runtime_suspend(struct device *dev)
@@ -1857,8 +1698,9 @@ static int mmci_runtime_resume(struct device *dev)
 #endif
 
 static const struct dev_pm_ops mmci_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(mmci_suspend, mmci_resume)
-	SET_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_PM_RUNTIME_PM_OPS(mmci_runtime_suspend, mmci_runtime_resume, NULL)
 };
 
 static struct amba_id mmci_ids[] = {
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 58b1b8896bf..347d942d740 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -13,6 +13,16 @@
 #define MCI_PWR_ON		0x03
 #define MCI_OD			(1 << 6)
 #define MCI_ROD			(1 << 7)
+/*
+ * The ST Micro version does not have ROD and reuse the voltage registers for
+ * direction settings.
+ */
+#define MCI_ST_DATA2DIREN	(1 << 2)
+#define MCI_ST_CMDDIREN		(1 << 3)
+#define MCI_ST_DATA0DIREN	(1 << 4)
+#define MCI_ST_DATA31DIREN	(1 << 5)
+#define MCI_ST_FBCLKEN		(1 << 7)
+#define MCI_ST_DATA74DIREN	(1 << 8)
 
 #define MMCICLOCK		0x004
 #define MCI_CLK_ENABLE		(1 << 8)
@@ -176,9 +186,6 @@ struct mmci_host {
 	struct mmc_data		*data;
 	struct mmc_host		*mmc;
 	struct clk		*clk;
-	int			gpio_cd;
-	int			gpio_wp;
-	int			gpio_cd_irq;
 	bool			singleirq;
 
 	spinlock_t		lock;
@@ -186,6 +193,7 @@ struct mmci_host {
 	unsigned int		mclk;
 	unsigned int		cclk;
 	u32			pwr_reg;
+	u32			pwr_reg_add;
 	u32			clk_reg;
 	u32			datactrl_reg;
 	u32			busy_status;