1 files changed, 47 insertions, 50 deletions

diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
index 17cd39360afe..8897ad7035fd 100644
--- a/arch/arm/mach-omap2/gpmc-nand.c
+++ b/arch/arm/mach-omap2/gpmc-nand.c
@@ -24,25 +24,6 @@
 /* minimum size for IO mapping */
 #define	NAND_IO_SIZE	4
 
-static struct resource gpmc_nand_resource[] = {
-	{
-		.flags		= IORESOURCE_MEM,
-	},
-	{
-		.flags		= IORESOURCE_IRQ,
-	},
-	{
-		.flags		= IORESOURCE_IRQ,
-	},
-};
-
-static struct platform_device gpmc_nand_device = {
-	.name		= "omap2-nand",
-	.id		= 0,
-	.num_resources	= ARRAY_SIZE(gpmc_nand_resource),
-	.resource	= gpmc_nand_resource,
-};
-
 static bool gpmc_hwecc_bch_capable(enum omap_ecc ecc_opt)
 {
 	/* platforms which support all ECC schemes */
@@ -50,6 +31,16 @@ static bool gpmc_hwecc_bch_capable(enum omap_ecc ecc_opt)
 		 soc_is_omap54xx() || soc_is_dra7xx())
 		return 1;
 
+	if (ecc_opt == OMAP_ECC_BCH4_CODE_HW_DETECTION_SW ||
+		 ecc_opt == OMAP_ECC_BCH8_CODE_HW_DETECTION_SW) {
+		if (cpu_is_omap24xx())
+			return 0;
+		else if (cpu_is_omap3630() && (GET_OMAP_REVISION() == 0))
+			return 0;
+		else
+			return 1;
+	}
+
 	/* OMAP3xxx do not have ELM engine, so cannot support ECC schemes
 	 * which require H/W based ECC error detection */
 	if ((cpu_is_omap34xx() || cpu_is_omap3630()) &&
@@ -57,14 +48,6 @@ static bool gpmc_hwecc_bch_capable(enum omap_ecc ecc_opt)
 		 (ecc_opt == OMAP_ECC_BCH8_CODE_HW)))
 		return 0;
 
-	/*
-	 * For now, assume 4-bit mode is only supported on OMAP3630 ES1.x, x>=1
-	 * and AM33xx derivates. Other chips may be added if confirmed to work.
-	 */
-	if ((ecc_opt == OMAP_ECC_BCH4_CODE_HW_DETECTION_SW) &&
-	    (!cpu_is_omap3630() || (GET_OMAP_REVISION() == 0)))
-		return 0;
-
 	/* legacy platforms support only HAM1 (1-bit Hamming) ECC scheme */
 	if (ecc_opt == OMAP_ECC_HAM1_CODE_HW)
 		return 1;
@@ -93,43 +76,41 @@ int gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
 {
 	int err	= 0;
 	struct gpmc_settings s;
-	struct device *dev = &gpmc_nand_device.dev;
+	struct platform_device *pdev;
+	struct resource gpmc_nand_res[] = {
+		{ .flags = IORESOURCE_MEM, },
+		{ .flags = IORESOURCE_IRQ, },
+		{ .flags = IORESOURCE_IRQ, },
+	};
 
-	memset(&s, 0, sizeof(struct gpmc_settings));
-
-	gpmc_nand_device.dev.platform_data = gpmc_nand_data;
+	BUG_ON(gpmc_nand_data->cs >= GPMC_CS_NUM);
 
 	err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
-				(unsigned long *)&gpmc_nand_resource[0].start);
+			      (unsigned long *)&gpmc_nand_res[0].start);
 	if (err < 0) {
-		dev_err(dev, "Cannot request GPMC CS %d, error %d\n",
-			gpmc_nand_data->cs, err);
+		pr_err("omap2-gpmc: Cannot request GPMC CS %d, error %d\n",
+		       gpmc_nand_data->cs, err);
 		return err;
 	}
-
-	gpmc_nand_resource[0].end = gpmc_nand_resource[0].start +
-							NAND_IO_SIZE - 1;
-
-	gpmc_nand_resource[1].start =
-				gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE);
-	gpmc_nand_resource[2].start =
-				gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT);
+	gpmc_nand_res[0].end = gpmc_nand_res[0].start + NAND_IO_SIZE - 1;
+	gpmc_nand_res[1].start = gpmc_get_client_irq(GPMC_IRQ_FIFOEVENTENABLE);
+	gpmc_nand_res[2].start = gpmc_get_client_irq(GPMC_IRQ_COUNT_EVENT);
 
 	if (gpmc_t) {
 		err = gpmc_cs_set_timings(gpmc_nand_data->cs, gpmc_t);
 		if (err < 0) {
-			dev_err(dev, "Unable to set gpmc timings: %d\n", err);
+			pr_err("omap2-gpmc: Unable to set gpmc timings: %d\n", err);
 			return err;
 		}
 	}
 
+	memset(&s, 0, sizeof(struct gpmc_settings));
 	if (gpmc_nand_data->of_node)
 		gpmc_read_settings_dt(gpmc_nand_data->of_node, &s);
 	else
 		gpmc_set_legacy(gpmc_nand_data, &s);
 
 	s.device_nand = true;
-
 	err = gpmc_cs_program_settings(gpmc_nand_data->cs, &s);
 	if (err < 0)
 		goto out_free_cs;
@@ -141,18 +122,34 @@ int gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
 	gpmc_update_nand_reg(&gpmc_nand_data->reg, gpmc_nand_data->cs);
 
 	if (!gpmc_hwecc_bch_capable(gpmc_nand_data->ecc_opt)) {
-		dev_err(dev, "Unsupported NAND ECC scheme selected\n");
-		return -EINVAL;
+		pr_err("omap2-nand: Unsupported NAND ECC scheme selected\n");
+		err = -EINVAL;
+		goto out_free_cs;
 	}
 
-	err = platform_device_register(&gpmc_nand_device);
-	if (err < 0) {
-		dev_err(dev, "Unable to register NAND device\n");
-		goto out_free_cs;
+
+	pdev = platform_device_alloc("omap2-nand", gpmc_nand_data->cs);
+	if (pdev) {
+		err = platform_device_add_resources(pdev, gpmc_nand_res,
+						    ARRAY_SIZE(gpmc_nand_res));
+		if (!err)
+			pdev->dev.platform_data = gpmc_nand_data;
+	} else {
+		err = -ENOMEM;
+	}
+	if (err)
+		goto out_free_pdev;
+
+	err = platform_device_add(pdev);
+	if (err) {
+		dev_err(&pdev->dev, "Unable to register NAND device\n");
+		goto out_free_pdev;
 	}
 
 	return 0;
 
+out_free_pdev:
+	platform_device_put(pdev);
 out_free_cs:
 	gpmc_cs_free(gpmc_nand_data->cs);