1 files changed, 41 insertions, 45 deletions

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index c0667c8af2bd..323c5022c2ca 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -232,7 +232,7 @@ static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd)
 {
 	struct mmc_data	*data;
 	struct dw_mci_slot *slot = mmc_priv(mmc);
-	struct dw_mci_drv_data *drv_data = slot->host->drv_data;
+	const struct dw_mci_drv_data *drv_data = slot->host->drv_data;
 	u32 cmdr;
 	cmd->error = -EINPROGRESS;
 
@@ -617,13 +617,13 @@ static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg)
 		cmd, arg, cmd_status);
 }
 
-static void dw_mci_setup_bus(struct dw_mci_slot *slot)
+static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit)
 {
 	struct dw_mci *host = slot->host;
 	u32 div;
 	u32 clk_en_a;
 
-	if (slot->clock != host->current_speed) {
+	if (slot->clock != host->current_speed || force_clkinit) {
 		div = host->bus_hz / slot->clock;
 		if (host->bus_hz % slot->clock && host->bus_hz > slot->clock)
 			/*
@@ -683,9 +683,6 @@ static void __dw_mci_start_request(struct dw_mci *host,
 	if (host->pdata->select_slot)
 		host->pdata->select_slot(slot->id);
 
-	/* Slot specific timing and width adjustment */
-	dw_mci_setup_bus(slot);
-
 	host->cur_slot = slot;
 	host->mrq = mrq;
 
@@ -773,22 +770,19 @@ static void dw_mci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct dw_mci_slot *slot = mmc_priv(mmc);
-	struct dw_mci_drv_data *drv_data = slot->host->drv_data;
+	const struct dw_mci_drv_data *drv_data = slot->host->drv_data;
 	u32 regs;
 
-	/* set default 1 bit mode */
-	slot->ctype = SDMMC_CTYPE_1BIT;
-
 	switch (ios->bus_width) {
-	case MMC_BUS_WIDTH_1:
-		slot->ctype = SDMMC_CTYPE_1BIT;
-		break;
 	case MMC_BUS_WIDTH_4:
 		slot->ctype = SDMMC_CTYPE_4BIT;
 		break;
 	case MMC_BUS_WIDTH_8:
 		slot->ctype = SDMMC_CTYPE_8BIT;
 		break;
+	default:
+		/* set default 1 bit mode */
+		slot->ctype = SDMMC_CTYPE_1BIT;
 	}
 
 	regs = mci_readl(slot->host, UHS_REG);
@@ -812,6 +806,9 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	if (drv_data && drv_data->set_ios)
 		drv_data->set_ios(slot->host, ios);
 
+	/* Slot specific timing and width adjustment */
+	dw_mci_setup_bus(slot, false);
+
 	switch (ios->power_mode) {
 	case MMC_POWER_UP:
 		set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags);
@@ -1817,7 +1814,7 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 {
 	struct mmc_host *mmc;
 	struct dw_mci_slot *slot;
-	struct dw_mci_drv_data *drv_data = host->drv_data;
+	const struct dw_mci_drv_data *drv_data = host->drv_data;
 	int ctrl_id, ret;
 	u8 bus_width;
 
@@ -1850,6 +1847,9 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 	if (host->pdata->caps)
 		mmc->caps = host->pdata->caps;
 
+	if (host->pdata->pm_caps)
+		mmc->pm_caps = host->pdata->pm_caps;
+
 	if (host->dev->of_node) {
 		ctrl_id = of_alias_get_id(host->dev->of_node, "mshc");
 		if (ctrl_id < 0)
@@ -1911,7 +1911,7 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
 #endif /* CONFIG_MMC_DW_IDMAC */
 	}
 
-	host->vmmc = regulator_get(mmc_dev(mmc), "vmmc");
+	host->vmmc = devm_regulator_get(mmc_dev(mmc), "vmmc");
 	if (IS_ERR(host->vmmc)) {
 		pr_info("%s: no vmmc regulator found\n", mmc_hostname(mmc));
 		host->vmmc = NULL;
@@ -1960,7 +1960,7 @@ static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id)
 static void dw_mci_init_dma(struct dw_mci *host)
 {
 	/* Alloc memory for sg translation */
-	host->sg_cpu = dma_alloc_coherent(host->dev, PAGE_SIZE,
+	host->sg_cpu = dmam_alloc_coherent(host->dev, PAGE_SIZE,
 					  &host->sg_dma, GFP_KERNEL);
 	if (!host->sg_cpu) {
 		dev_err(host->dev, "%s: could not alloc DMA memory\n",
@@ -2038,7 +2038,7 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
 	struct dw_mci_board *pdata;
 	struct device *dev = host->dev;
 	struct device_node *np = dev->of_node;
-	struct dw_mci_drv_data *drv_data = host->drv_data;
+	const struct dw_mci_drv_data *drv_data = host->drv_data;
 	int idx, ret;
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
@@ -2072,6 +2072,12 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
 			return ERR_PTR(ret);
 	}
 
+	if (of_find_property(np, "keep-power-in-suspend", NULL))
+		pdata->pm_caps |= MMC_PM_KEEP_POWER;
+
+	if (of_find_property(np, "enable-sdio-wakeup", NULL))
+		pdata->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
+
 	return pdata;
 }
 
@@ -2084,7 +2090,7 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
 
 int dw_mci_probe(struct dw_mci *host)
 {
-	struct dw_mci_drv_data *drv_data = host->drv_data;
+	const struct dw_mci_drv_data *drv_data = host->drv_data;
 	int width, i, ret = 0;
 	u32 fifo_size;
 	int init_slots = 0;
@@ -2103,26 +2109,24 @@ int dw_mci_probe(struct dw_mci *host)
 		return -ENODEV;
 	}
 
-	host->biu_clk = clk_get(host->dev, "biu");
+	host->biu_clk = devm_clk_get(host->dev, "biu");
 	if (IS_ERR(host->biu_clk)) {
 		dev_dbg(host->dev, "biu clock not available\n");
 	} else {
 		ret = clk_prepare_enable(host->biu_clk);
 		if (ret) {
 			dev_err(host->dev, "failed to enable biu clock\n");
-			clk_put(host->biu_clk);
 			return ret;
 		}
 	}
 
-	host->ciu_clk = clk_get(host->dev, "ciu");
+	host->ciu_clk = devm_clk_get(host->dev, "ciu");
 	if (IS_ERR(host->ciu_clk)) {
 		dev_dbg(host->dev, "ciu clock not available\n");
 	} else {
 		ret = clk_prepare_enable(host->ciu_clk);
 		if (ret) {
 			dev_err(host->dev, "failed to enable ciu clock\n");
-			clk_put(host->ciu_clk);
 			goto err_clk_biu;
 		}
 	}
@@ -2224,7 +2228,8 @@ int dw_mci_probe(struct dw_mci *host)
 	if (!host->card_workqueue)
 		goto err_dmaunmap;
 	INIT_WORK(&host->card_work, dw_mci_work_routine_card);
-	ret = request_irq(host->irq, dw_mci_interrupt, host->irq_flags, "dw-mci", host);
+	ret = devm_request_irq(host->dev, host->irq, dw_mci_interrupt,
+			       host->irq_flags, "dw-mci", host);
 	if (ret)
 		goto err_workqueue;
 
@@ -2262,7 +2267,7 @@ int dw_mci_probe(struct dw_mci *host)
 	} else {
 		dev_dbg(host->dev, "attempted to initialize %d slots, "
 					"but failed on all\n", host->num_slots);
-		goto err_init_slot;
+		goto err_workqueue;
 	}
 
 	/*
@@ -2282,33 +2287,24 @@ int dw_mci_probe(struct dw_mci *host)
 
 	return 0;
 
-err_init_slot:
-	free_irq(host->irq, host);
-
 err_workqueue:
 	destroy_workqueue(host->card_workqueue);
 
 err_dmaunmap:
 	if (host->use_dma && host->dma_ops->exit)
 		host->dma_ops->exit(host);
-	dma_free_coherent(host->dev, PAGE_SIZE,
-			  host->sg_cpu, host->sg_dma);
 
-	if (host->vmmc) {
+	if (host->vmmc)
 		regulator_disable(host->vmmc);
-		regulator_put(host->vmmc);
-	}
 
 err_clk_ciu:
-	if (!IS_ERR(host->ciu_clk)) {
+	if (!IS_ERR(host->ciu_clk))
 		clk_disable_unprepare(host->ciu_clk);
-		clk_put(host->ciu_clk);
-	}
+
 err_clk_biu:
-	if (!IS_ERR(host->biu_clk)) {
+	if (!IS_ERR(host->biu_clk))
 		clk_disable_unprepare(host->biu_clk);
-		clk_put(host->biu_clk);
-	}
+
 	return ret;
 }
 EXPORT_SYMBOL(dw_mci_probe);
@@ -2330,24 +2326,19 @@ void dw_mci_remove(struct dw_mci *host)
 	mci_writel(host, CLKENA, 0);
 	mci_writel(host, CLKSRC, 0);
 
-	free_irq(host->irq, host);
 	destroy_workqueue(host->card_workqueue);
-	dma_free_coherent(host->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
 
 	if (host->use_dma && host->dma_ops->exit)
 		host->dma_ops->exit(host);
 
-	if (host->vmmc) {
+	if (host->vmmc)
 		regulator_disable(host->vmmc);
-		regulator_put(host->vmmc);
-	}
 
 	if (!IS_ERR(host->ciu_clk))
 		clk_disable_unprepare(host->ciu_clk);
+
 	if (!IS_ERR(host->biu_clk))
 		clk_disable_unprepare(host->biu_clk);
-	clk_put(host->ciu_clk);
-	clk_put(host->biu_clk);
 }
 EXPORT_SYMBOL(dw_mci_remove);
 
@@ -2411,6 +2402,11 @@ int dw_mci_resume(struct dw_mci *host)
 		struct dw_mci_slot *slot = host->slot[i];
 		if (!slot)
 			continue;
+		if (slot->mmc->pm_flags & MMC_PM_KEEP_POWER) {
+			dw_mci_set_ios(slot->mmc, &slot->mmc->ios);
+			dw_mci_setup_bus(slot, true);
+		}
+
 		ret = mmc_resume_host(host->slot[i]->mmc);
 		if (ret < 0)
 			return ret;