1 files changed, 66 insertions, 64 deletions

diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index 8fa478c..36b5af8 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -35,6 +35,7 @@
 #include <linux/mmc/mmc.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/mmc/slot-gpio.h>
 
 #include <linux/platform_data/mmc-davinci.h>
 
@@ -1029,9 +1030,10 @@ static int mmc_davinci_get_cd(struct mmc_host *mmc)
 	struct platform_device *pdev = to_platform_device(mmc->parent);
 	struct davinci_mmc_config *config = pdev->dev.platform_data;
 
-	if (!config || !config->get_cd)
-		return -ENOSYS;
-	return config->get_cd(pdev->id);
+	if (config && config->get_cd)
+		return config->get_cd(pdev->id);
+
+	return mmc_gpio_get_cd(mmc);
 }
 
 static int mmc_davinci_get_ro(struct mmc_host *mmc)
@@ -1039,9 +1041,10 @@ static int mmc_davinci_get_ro(struct mmc_host *mmc)
 	struct platform_device *pdev = to_platform_device(mmc->parent);
 	struct davinci_mmc_config *config = pdev->dev.platform_data;
 
-	if (!config || !config->get_ro)
-		return -ENOSYS;
-	return config->get_ro(pdev->id);
+	if (config && config->get_ro)
+		return config->get_ro(pdev->id);
+
+	return mmc_gpio_get_ro(mmc);
 }
 
 static void mmc_davinci_enable_sdio_irq(struct mmc_host *mmc, int enable)
@@ -1159,49 +1162,53 @@ static const struct of_device_id davinci_mmc_dt_ids[] = {
 };
 MODULE_DEVICE_TABLE(of, davinci_mmc_dt_ids);
 
-static struct davinci_mmc_config
-	*mmc_parse_pdata(struct platform_device *pdev)
+static int mmc_davinci_parse_pdata(struct mmc_host *mmc)
 {
-	struct device_node *np;
+	struct platform_device *pdev = to_platform_device(mmc->parent);
 	struct davinci_mmc_config *pdata = pdev->dev.platform_data;
-	const struct of_device_id *match =
-		of_match_device(davinci_mmc_dt_ids, &pdev->dev);
-	u32 data;
-
-	np = pdev->dev.of_node;
-	if (!np)
-		return pdata;
-
-	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata) {
-		dev_err(&pdev->dev, "Failed to allocate memory for struct davinci_mmc_config\n");
-		goto nodata;
-	}
+	struct mmc_davinci_host *host;
+	int ret;
 
-	if (match)
-		pdev->id_entry = match->data;
+	if (!pdata)
+		return -EINVAL;
 
-	if (of_property_read_u32(np, "max-frequency", &pdata->max_freq))
-		dev_info(&pdev->dev, "'max-frequency' property not specified, defaulting to 25MHz\n");
+	host = mmc_priv(mmc);
+	if (!host)
+		return -EINVAL;
 
-	of_property_read_u32(np, "bus-width", &data);
-	switch (data) {
-	case 1:
-	case 4:
-	case 8:
-		pdata->wires = data;
-		break;
-	default:
-		pdata->wires = 1;
-		dev_info(&pdev->dev, "Unsupported buswidth, defaulting to 1 bit\n");
-	}
-nodata:
-	return pdata;
+	if (pdata && pdata->nr_sg)
+		host->nr_sg = pdata->nr_sg - 1;
+
+	if (pdata && (pdata->wires == 4 || pdata->wires == 0))
+		mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+	if (pdata && (pdata->wires == 8))
+		mmc->caps |= (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA);
+
+	mmc->f_min = 312500;
+	mmc->f_max = 25000000;
+	if (pdata && pdata->max_freq)
+		mmc->f_max = pdata->max_freq;
+	if (pdata && pdata->caps)
+		mmc->caps |= pdata->caps;
+
+	/* Register a cd gpio, if there is not one, enable polling */
+	ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0, NULL);
+	if (ret == -EPROBE_DEFER)
+		return ret;
+	else if (ret)
+		mmc->caps |= MMC_CAP_NEEDS_POLL;
+
+	ret = mmc_gpiod_request_ro(mmc, "wp", 0, false, 0, NULL);
+	if (ret == -EPROBE_DEFER)
+		return ret;
+
+	return 0;
 }
 
 static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 {
-	struct davinci_mmc_config *pdata = NULL;
+	const struct of_device_id *match;
 	struct mmc_davinci_host *host = NULL;
 	struct mmc_host *mmc = NULL;
 	struct resource *r, *mem = NULL;
@@ -1209,12 +1216,6 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 	size_t mem_size;
 	const struct platform_device_id *id_entry;
 
-	pdata = mmc_parse_pdata(pdev);
-	if (pdata == NULL) {
-		dev_err(&pdev->dev, "Couldn't get platform data\n");
-		return -ENOENT;
-	}
-
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!r)
 		return -ENODEV;
@@ -1253,14 +1254,28 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 
 	host->mmc_input_clk = clk_get_rate(host->clk);
 
-	init_mmcsd_host(host);
-
-	if (pdata->nr_sg)
-		host->nr_sg = pdata->nr_sg - 1;
+	match = of_match_device(davinci_mmc_dt_ids, &pdev->dev);
+	if (match) {
+		pdev->id_entry = match->data;
+		ret = mmc_of_parse(mmc);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"could not parse of data: %d\n", ret);
+			goto parse_fail;
+		}
+	} else {
+		ret = mmc_davinci_parse_pdata(mmc);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"could not parse platform data: %d\n", ret);
+			goto parse_fail;
+	}	}
 
 	if (host->nr_sg > MAX_NR_SG || !host->nr_sg)
 		host->nr_sg = MAX_NR_SG;
 
+	init_mmcsd_host(host);
+
 	host->use_dma = use_dma;
 	host->mmc_irq = irq;
 	host->sdio_irq = platform_get_irq(pdev, 1);
@@ -1273,27 +1288,13 @@ static int __init davinci_mmcsd_probe(struct platform_device *pdev)
 			host->use_dma = 0;
 	}
 
-	/* REVISIT:  someday, support IRQ-driven card detection.  */
-	mmc->caps |= MMC_CAP_NEEDS_POLL;
 	mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
 
-	if (pdata && (pdata->wires == 4 || pdata->wires == 0))
-		mmc->caps |= MMC_CAP_4_BIT_DATA;
-
-	if (pdata && (pdata->wires == 8))
-		mmc->caps |= (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA);
-
 	id_entry = platform_get_device_id(pdev);
 	if (id_entry)
 		host->version = id_entry->driver_data;
 
 	mmc->ops = &mmc_davinci_ops;
-	mmc->f_min = 312500;
-	mmc->f_max = 25000000;
-	if (pdata && pdata->max_freq)
-		mmc->f_max = pdata->max_freq;
-	if (pdata && pdata->caps)
-		mmc->caps |= pdata->caps;
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
 
 	/* With no iommu coalescing pages, each phys_seg is a hw_seg.
@@ -1354,6 +1355,7 @@ mmc_add_host_fail:
 	mmc_davinci_cpufreq_deregister(host);
 cpu_freq_fail:
 	davinci_release_dma_channels(host);
+parse_fail:
 dma_probe_defer:
 	clk_disable_unprepare(host->clk);
 clk_prepare_enable_fail: