mmc: jz4740: Remove platform data and use standard APIs

Drop the custom code to get the 'cd' and 'wp' GPIOs. The driver now
calls mmc_of_parse() which will init these from devicetree or
device properties.

Also drop the custom code to get the 'power' GPIO. The MMC core
provides us with the means to power the MMC card through an external
regulator.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/jz4740_mmc.c

@@ -21,7 +21,6 @@
 #include <linux/dmaengine.h>
 #include <linux/dma-mapping.h>
 #include <linux/err.h>
-#include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/irq.h>
@@ -36,7 +35,6 @@
 #include <asm/cacheflush.h>
 
 #include <asm/mach-jz4740/dma.h>
-#include <asm/mach-jz4740/jz4740_mmc.h>
 
 #define JZ_REG_MMC_STRPCL	0x00
 #define JZ_REG_MMC_STATUS	0x04
@@ -148,9 +146,7 @@ enum jz4780_cookie {
 struct jz4740_mmc_host {
 	struct mmc_host *mmc;
 	struct platform_device *pdev;
-	struct jz4740_mmc_platform_data *pdata;
 	struct clk *clk;
-	struct gpio_desc *power;
 
 	enum jz4740_mmc_version version;
 
@@ -896,16 +892,16 @@ static void jz4740_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	switch (ios->power_mode) {
 	case MMC_POWER_UP:
 		jz4740_mmc_reset(host);
-		if (host->power)
-			gpiod_set_value(host->power, 1);
+		if (!IS_ERR(mmc->supply.vmmc))
+			mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd);
 		host->cmdat |= JZ_MMC_CMDAT_INIT;
 		clk_prepare_enable(host->clk);
 		break;
 	case MMC_POWER_ON:
 		break;
 	default:
-		if (host->power)
-			gpiod_set_value(host->power, 0);
+		if (!IS_ERR(mmc->supply.vmmc))
+			mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
 		clk_disable_unprepare(host->clk);
 		break;
 	}
@@ -938,38 +934,6 @@ static const struct mmc_host_ops jz4740_mmc_ops = {
 	.enable_sdio_irq = jz4740_mmc_enable_sdio_irq,
 };
 
-static int jz4740_mmc_request_gpios(struct jz4740_mmc_host *host,
-				    struct mmc_host *mmc,
-				    struct platform_device *pdev)
-{
-	struct jz4740_mmc_platform_data *pdata = dev_get_platdata(&pdev->dev);
-	int ret = 0;
-
-	if (!pdata)
-		return 0;
-
-	if (!pdata->card_detect_active_low)
-		mmc->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
-	if (!pdata->read_only_active_low)
-		mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
-
-	/*
-	 * Get optional card detect and write protect GPIOs,
-	 * only back out on probe deferral.
-	 */
-	ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0, NULL);
-	if (ret == -EPROBE_DEFER)
-		return ret;
-
-	ret = mmc_gpiod_request_ro(mmc, "wp", 0, false, 0, NULL);
-	if (ret == -EPROBE_DEFER)
-		return ret;
-
-	host->power = devm_gpiod_get_optional(&pdev->dev, "power",
-					      GPIOD_OUT_HIGH);
-	return PTR_ERR_OR_ZERO(host->power);
-}
-
 static const struct of_device_id jz4740_mmc_of_match[] = {
 	{ .compatible = "ingenic,jz4740-mmc", .data = (void *) JZ_MMC_JZ4740 },
 	{ .compatible = "ingenic,jz4725b-mmc", .data = (void *)JZ_MMC_JZ4725B },
@@ -984,9 +948,6 @@ static int jz4740_mmc_probe(struct platform_device* pdev)
 	struct mmc_host *mmc;
 	struct jz4740_mmc_host *host;
 	const struct of_device_id *match;
-	struct jz4740_mmc_platform_data *pdata;
-
-	pdata = dev_get_platdata(&pdev->dev);
 
 	mmc = mmc_alloc_host(sizeof(struct jz4740_mmc_host), &pdev->dev);
 	if (!mmc) {
@@ -995,29 +956,25 @@ static int jz4740_mmc_probe(struct platform_device* pdev)
 	}
 
 	host = mmc_priv(mmc);
-	host->pdata = pdata;
 
 	match = of_match_device(jz4740_mmc_of_match, &pdev->dev);
 	if (match) {
 		host->version = (enum jz4740_mmc_version)match->data;
+	} else {
+		/* JZ4740 should be the only one using legacy probe */
+		host->version = JZ_MMC_JZ4740;
+	}
+
 	ret = mmc_of_parse(mmc);
 	if (ret) {
 		if (ret != -EPROBE_DEFER)
 			dev_err(&pdev->dev,
-					"could not parse of data: %d\n", ret);
-			goto err_free_host;
-		}
-	} else {
-		/* JZ4740 should be the only one using legacy probe */
-		host->version = JZ_MMC_JZ4740;
-		mmc->caps |= MMC_CAP_SDIO_IRQ;
-		if (!(pdata && pdata->data_1bit))
-			mmc->caps |= MMC_CAP_4_BIT_DATA;
-		ret = jz4740_mmc_request_gpios(host, mmc, pdev);
-		if (ret)
+				"could not parse device properties: %d\n", ret);
 		goto err_free_host;
 	}
 
+	mmc_regulator_get_supply(mmc);
+
 	host->irq = platform_get_irq(pdev, 0);
 	if (host->irq < 0) {
 		ret = host->irq;