mtd: maps: Merge physmap_of.c into physmap-core.c

There's no real reason to have two separate driver for the DT and pdata
case. Just do what we do everywhere else and handle DT and pdata
parsing in the same driver.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

drivers/mtd/maps/Kconfig

@@ -66,8 +66,8 @@ config MTD_PHYSMAP_BANKWIDTH
 	  used internally by the CFI drivers.
 
 config MTD_PHYSMAP_OF
-	tristate "Memory device in physical memory map based on OF description"
-	depends on OF && (MTD_CFI || MTD_JEDECPROBE || MTD_ROM || MTD_RAM)
+	bool "Memory device in physical memory map based on OF description"
+	depends on OF && MTD_PHYSMAP
 	help
 	  This provides a 'mapping' driver which allows the NOR Flash, ROM
 	  and RAM driver code to communicate with chips which are mapped

drivers/mtd/maps/Makefile

@@ -18,13 +18,10 @@ obj-$(CONFIG_MTD_CK804XROM)	+= ck804xrom.o
 obj-$(CONFIG_MTD_TSUNAMI)	+= tsunami_flash.o
 obj-$(CONFIG_MTD_PXA2XX)	+= pxa2xx-flash.o
 physmap-objs-y			+= physmap-core.o
+physmap-objs-$(CONFIG_MTD_PHYSMAP_OF_VERSATILE) += physmap_of_versatile.o
+physmap-objs-$(CONFIG_MTD_PHYSMAP_OF_GEMINI) += physmap_of_gemini.o
 physmap-objs			:= $(physmap-objs-y)
 obj-$(CONFIG_MTD_PHYSMAP)	+= physmap.o
-physmap_of-objs-y		+= physmap_of_core.o
-physmap_of-objs-$(CONFIG_MTD_PHYSMAP_OF_VERSATILE) += physmap_of_versatile.o
-physmap_of-objs-$(CONFIG_MTD_PHYSMAP_OF_GEMINI) += physmap_of_gemini.o
-physmap_of-objs			:= $(physmap_of-objs-y)
-obj-$(CONFIG_MTD_PHYSMAP_OF)	+= physmap_of.o
 obj-$(CONFIG_MTD_PISMO)		+= pismo.o
 obj-$(CONFIG_MTD_PMC_MSP_EVM)   += pmcmsp-flash.o
 obj-$(CONFIG_MTD_PCMCIA)	+= pcmciamtd.o

drivers/mtd/maps/physmap-core.c

@@ -6,6 +6,13 @@
  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
  *
  * 031022 - [jsun] add run-time configure and partition setup
+ *
+ * Device tree support:
+ *    Copyright (C) 2006 MontaVista Software Inc.
+ *    Author: Vitaly Wool <vwool@ru.mvista.com>
+ *
+ *    Revised to handle newer style flash binding by:
+ *    Copyright (C) 2007 David Gibson, IBM Corporation.
  */
 
 #include <linux/module.h>
@@ -20,7 +27,12 @@
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/physmap.h>
 #include <linux/mtd/concat.h>
+#include <linux/mtd/cfi_endian.h>
 #include <linux/io.h>
+#include <linux/of_device.h>
+
+#include "physmap_of_gemini.h"
+#include "physmap_of_versatile.h"
 
 struct physmap_flash_info {
 	unsigned int		nmaps;
@@ -29,6 +41,10 @@ struct physmap_flash_info {
 	struct map_info		*maps;
 	spinlock_t		vpp_lock;
 	int			vpp_refcnt;
+	const char		*probe_type;
+	const char * const	*part_types;
+	unsigned int		nparts;
+	const struct mtd_partition *parts;
 };
 
 static int physmap_flash_remove(struct platform_device *dev)
@@ -41,8 +57,6 @@ static int physmap_flash_remove(struct platform_device *dev)
 	if (!info)
 		return 0;
 
-	physmap_data = dev_get_platdata(&dev->dev);
-
 	if (info->cmtd) {
 		err = mtd_device_unregister(info->cmtd);
 		if (err)
@@ -57,7 +71,8 @@ static int physmap_flash_remove(struct platform_device *dev)
 			map_destroy(info->mtds[i]);
 	}
 
-	if (physmap_data->exit)
+	physmap_data = dev_get_platdata(&dev->dev);
+	if (physmap_data && physmap_data->exit)
 		physmap_data->exit(dev);
 
 	return 0;
@@ -89,6 +104,172 @@ static void physmap_set_vpp(struct map_info *map, int state)
 	spin_unlock_irqrestore(&info->vpp_lock, flags);
 }
 
+#if IS_ENABLED(CONFIG_MTD_PHYSMAP_OF)
+static const struct of_device_id of_flash_match[] = {
+	{
+		.compatible = "cfi-flash",
+		.data = "cfi_probe",
+	},
+	{
+		/*
+		 * FIXME: JEDEC chips can't be safely and reliably
+		 * probed, although the mtd code gets it right in
+		 * practice most of the time.  We should use the
+		 * vendor and device ids specified by the binding to
+		 * bypass the heuristic probe code, but the mtd layer
+		 * provides, at present, no interface for doing so
+		 * :(.
+		 */
+		.compatible = "jedec-flash",
+		.data = "jedec_probe",
+	},
+	{
+		.compatible = "mtd-ram",
+		.data = "map_ram",
+	},
+	{
+		.compatible = "mtd-rom",
+		.data = "map_rom",
+	},
+	{
+		.type = "rom",
+		.compatible = "direct-mapped"
+	},
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, of_flash_match);
+
+static const char * const of_default_part_probes[] = {
+	"cmdlinepart", "RedBoot", "ofpart", "ofoldpart", NULL
+};
+
+static const char * const *of_get_part_probes(struct platform_device *dev)
+{
+	struct device_node *dp = dev->dev.of_node;
+	const char **res;
+	int count;
+
+	count = of_property_count_strings(dp, "linux,part-probe");
+	if (count < 0)
+		return of_default_part_probes;
+
+	res = devm_kcalloc(&dev->dev, count + 1, sizeof(*res), GFP_KERNEL);
+	if (!res)
+		return NULL;
+
+	count = of_property_read_string_array(dp, "linux,part-probe", res,
+					      count);
+	if (count < 0)
+		return NULL;
+
+	return res;
+}
+
+static const char *of_select_probe_type(struct platform_device *dev)
+{
+	struct device_node *dp = dev->dev.of_node;
+	const struct of_device_id *match;
+	const char *probe_type;
+
+	match = of_match_device(of_flash_match, &dev->dev);
+	probe_type = match->data;
+	if (probe_type)
+		return probe_type;
+
+	dev_warn(&dev->dev,
+		 "Device tree uses obsolete \"direct-mapped\" flash binding\n");
+
+	of_property_read_string(dp, "probe-type", &probe_type);
+	if (!probe_type)
+		return NULL;
+
+	if (!strcmp(probe_type, "CFI")) {
+		probe_type = "cfi_probe";
+	} else if (!strcmp(probe_type, "JEDEC")) {
+		probe_type = "jedec_probe";
+	} else if (!strcmp(probe_type, "ROM")) {
+		probe_type = "map_rom";
+	} else {
+		dev_warn(&dev->dev,
+			 "obsolete_probe: don't know probe type '%s', mapping as rom\n",
+			 probe_type);
+		probe_type = "map_rom";
+	}
+
+	return probe_type;
+}
+
+static int physmap_flash_of_init(struct platform_device *dev)
+{
+	struct physmap_flash_info *info = platform_get_drvdata(dev);
+	struct device_node *dp = dev->dev.of_node;
+	const char *mtd_name = NULL;
+	int err, swap = 0;
+	bool map_indirect;
+	unsigned int i;
+	u32 bankwidth;
+
+	if (!dp)
+		return -EINVAL;
+
+	info->probe_type = of_select_probe_type(dev);
+
+	info->part_types = of_get_part_probes(dev);
+	if (!info->part_types)
+		return -ENOMEM;
+
+	of_property_read_string(dp, "linux,mtd-name", &mtd_name);
+
+	map_indirect = of_property_read_bool(dp, "no-unaligned-direct-access");
+
+	err = of_property_read_u32(dp, "bank-width", &bankwidth);
+	if (err) {
+		dev_err(&dev->dev, "Can't get bank width from device tree\n");
+		return err;
+	}
+
+	if (of_property_read_bool(dp, "big-endian"))
+		swap = CFI_BIG_ENDIAN;
+	else if (of_property_read_bool(dp, "little-endian"))
+		swap = CFI_LITTLE_ENDIAN;
+
+	for (i = 0; i < info->nmaps; i++) {
+		info->maps[i].name = mtd_name;
+		info->maps[i].swap = swap;
+		info->maps[i].bankwidth = bankwidth;
+		info->maps[i].device_node = dp;
+
+		err = of_flash_probe_gemini(dev, dp, &info->maps[i]);
+		if (err)
+			return err;
+
+		err = of_flash_probe_versatile(dev, dp, &info->maps[i]);
+		if (err)
+			return err;
+
+		/*
+		 * On some platforms (e.g. MPC5200) a direct 1:1 mapping
+		 * may cause problems with JFFS2 usage, as the local bus (LPB)
+		 * doesn't support unaligned accesses as implemented in the
+		 * JFFS2 code via memcpy(). By setting NO_XIP, the
+		 * flash will not be exposed directly to the MTD users
+		 * (e.g. JFFS2) any more.
+		 */
+		if (map_indirect)
+			info->maps[i].phys = NO_XIP;
+	}
+
+	return 0;
+}
+#else /* IS_ENABLED(CONFIG_MTD_PHYSMAP_OF) */
+#define of_flash_match NULL
+
+static int physmap_flash_of_init(struct platform_device *dev)
+{
+	return -ENOTSUPP;
+}
+#endif /* IS_ENABLED(CONFIG_MTD_PHYSMAP_OF) */
+
 static const char * const rom_probe_types[] = {
 	"cfi_probe", "jedec_probe", "qinfo_probe", "map_rom", NULL
 };
@@ -97,18 +278,46 @@ static const char * const part_probe_types[] = {
 	"cmdlinepart", "RedBoot", "afs", NULL
 };
 
-static int physmap_flash_probe(struct platform_device *dev)
+static int physmap_flash_pdata_init(struct platform_device *dev)
 {
+	struct physmap_flash_info *info = platform_get_drvdata(dev);
 	struct physmap_flash_data *physmap_data;
+	unsigned int i;
+	int err;
+
+	physmap_data = dev_get_platdata(&dev->dev);
+	if (!physmap_data)
+		return -EINVAL;
+
+	info->probe_type = physmap_data->probe_type;
+	info->part_types = physmap_data->part_probe_types ? : part_probe_types;
+	info->parts = physmap_data->parts;
+	info->nparts = physmap_data->nr_parts;
+
+	if (physmap_data->init) {
+		err = physmap_data->init(dev);
+		if (err)
+			return err;
+	}
+
+	for (i = 0; i < info->nmaps; i++) {
+		info->maps[i].bankwidth = physmap_data->width;
+		info->maps[i].pfow_base = physmap_data->pfow_base;
+		info->maps[i].set_vpp = physmap_set_vpp;
+	}
+
+	return 0;
+}
+
+static int physmap_flash_probe(struct platform_device *dev)
+{
 	struct physmap_flash_info *info;
 	const char * const *probe_type;
-	const char * const *part_types;
 	int err = 0;
 	int i;
 
-	physmap_data = dev_get_platdata(&dev->dev);
-	if (!physmap_data)
-		return -ENODEV;
+	if (!dev->dev.of_node && !dev_get_platdata(&dev->dev))
+		return -EINVAL;
 
 	info = devm_kzalloc(&dev->dev, sizeof(*info), GFP_KERNEL);
 	if (!info)
@@ -132,14 +341,16 @@ static int physmap_flash_probe(struct platform_device *dev)
 	if (!info->mtds)
 		return -ENOMEM;
 
-	if (physmap_data->init) {
-		err = physmap_data->init(dev);
-		if (err)
-			goto err_out;
-	}
-
 	platform_set_drvdata(dev, info);
 
+	if (dev->dev.of_node)
+		err = physmap_flash_of_init(dev);
+	else
+		err = physmap_flash_pdata_init(dev);
+
+	if (err)
+		return err;
+
 	for (i = 0; i < info->nmaps; i++) {
 		struct resource *res;
 
@@ -154,22 +365,22 @@ static int physmap_flash_probe(struct platform_device *dev)
 			   res);
 
 		info->maps[i].name = dev_name(&dev->dev);
-		info->maps[i].phys = res->start;
+
+		if (!info->maps[i].phys)
+			info->maps[i].phys = res->start;
+
 		info->maps[i].size = resource_size(res);
-		info->maps[i].bankwidth = physmap_data->width;
-		info->maps[i].set_vpp = physmap_set_vpp;
-		info->maps[i].pfow_base = physmap_data->pfow_base;
 		info->maps[i].map_priv_1 = (unsigned long)dev;
 
 		simple_map_init(&info->maps[i]);
 
 		probe_type = rom_probe_types;
-		if (!physmap_data->probe_type) {
+		if (!info->probe_type) {
 			for (; !info->mtds[i] && *probe_type; probe_type++)
 				info->mtds[i] = do_map_probe(*probe_type,
 							     &info->maps[i]);
 		} else {
-			info->mtds[i] = do_map_probe(physmap_data->probe_type,
+			info->mtds[i] = do_map_probe(info->probe_type,
 						     &info->maps[i]);
 		}
 
@@ -197,11 +408,9 @@ static int physmap_flash_probe(struct platform_device *dev)
 
 	spin_lock_init(&info->vpp_lock);
 
-	part_types = physmap_data->part_probe_types ? : part_probe_types;
-
-	err = mtd_device_parse_register(info->cmtd, part_types, NULL,
-					physmap_data->parts,
-					physmap_data->nr_parts);
+	mtd_set_of_node(info->cmtd, dev->dev.of_node);
+	err = mtd_device_parse_register(info->cmtd, info->part_types, NULL,
+					info->parts, info->nparts);
 	if (err)
 		goto err_out;
 
@@ -232,6 +441,7 @@ static struct platform_driver physmap_flash_driver = {
 	.shutdown	= physmap_flash_shutdown,
 	.driver		= {
 		.name	= "physmap-flash",
+		.of_match_table = of_flash_match,
 	},
 };
 
@@ -286,6 +496,7 @@ module_exit(physmap_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_AUTHOR("Vitaly Wool <vwool@ru.mvista.com>");
 MODULE_DESCRIPTION("Generic configurable MTD map driver");
 
 /* legacy platform drivers can't hotplug or coldplg */

drivers/mtd/maps/physmap_of_core.c

-/*
- * Flash mappings described by the OF (or flattened) device tree
- *
- * Copyright (C) 2006 MontaVista Software Inc.
- * Author: Vitaly Wool <vwool@ru.mvista.com>
- *
- * Revised to handle newer style flash binding by:
- *   Copyright (C) 2007 David Gibson, IBM Corporation.
- *
- * This program is free software; you can redistribute  it and/or modify it
- * under  the terms of  the GNU General  Public License as published by the
- * Free Software Foundation;  either version 2 of the  License, or (at your
- * option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/device.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/concat.h>
-#include <linux/mtd/cfi_endian.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_platform.h>
-#include <linux/slab.h>
-#include "physmap_of_gemini.h"
-#include "physmap_of_versatile.h"
-
-struct of_flash_list {
-	struct mtd_info *mtd;
-	struct map_info map;
-};
-
-struct of_flash {
-	struct mtd_info		*cmtd;
-	int list_size; /* number of elements in of_flash_list */
-	struct of_flash_list	list[0];
-};
-
-static int of_flash_remove(struct platform_device *dev)
-{
-	struct of_flash *info;
-	int i;
-
-	info = dev_get_drvdata(&dev->dev);
-	if (!info)
-		return 0;
-	dev_set_drvdata(&dev->dev, NULL);
-
-	if (info->cmtd) {
-		mtd_device_unregister(info->cmtd);
-		if (info->cmtd != info->list[0].mtd)
-			mtd_concat_destroy(info->cmtd);
-	}
-
-	for (i = 0; i < info->list_size; i++)
-		if (info->list[i].mtd)
-			map_destroy(info->list[i].mtd);
-
-	return 0;
-}
-
-static const char * const rom_probe_types[] = {
-	"cfi_probe", "jedec_probe", "map_rom" };
-
-/* Helper function to handle probing of the obsolete "direct-mapped"
- * compatible binding, which has an extra "probe-type" property
- * describing the type of flash probe necessary. */
-static struct mtd_info *obsolete_probe(struct platform_device *dev,
-				       struct map_info *map)
-{
-	struct device_node *dp = dev->dev.of_node;
-	const char *of_probe;
-	struct mtd_info *mtd;
-	int i;
-
-	dev_warn(&dev->dev, "Device tree uses obsolete \"direct-mapped\" "
-		 "flash binding\n");
-
-	of_probe = of_get_property(dp, "probe-type", NULL);
-	if (!of_probe) {
-		for (i = 0; i < ARRAY_SIZE(rom_probe_types); i++) {
-			mtd = do_map_probe(rom_probe_types[i], map);
-			if (mtd)
-				return mtd;
-		}
-		return NULL;
-	} else if (strcmp(of_probe, "CFI") == 0) {
-		return do_map_probe("cfi_probe", map);
-	} else if (strcmp(of_probe, "JEDEC") == 0) {
-		return do_map_probe("jedec_probe", map);
-	} else {
-		if (strcmp(of_probe, "ROM") != 0)
-			dev_warn(&dev->dev, "obsolete_probe: don't know probe "
-				 "type '%s', mapping as rom\n", of_probe);
-		return do_map_probe("map_rom", map);
-	}
-}
-
-/* When partitions are set we look for a linux,part-probe property which
-   specifies the list of partition probers to use. If none is given then the
-   default is use. These take precedence over other device tree
-   information. */
-static const char * const part_probe_types_def[] = {
-	"cmdlinepart", "RedBoot", "ofpart", "ofoldpart", NULL };
-
-static const char * const *of_get_probes(struct device_node *dp)
-{
-	const char **res;
-	int count;
-
-	count = of_property_count_strings(dp, "linux,part-probe");
-	if (count < 0)
-		return part_probe_types_def;
-
-	res = kcalloc(count + 1, sizeof(*res), GFP_KERNEL);
-	if (!res)
-		return NULL;
-
-	count = of_property_read_string_array(dp, "linux,part-probe", res,
-					      count);
-	if (count < 0)
-		return NULL;
-
-	return res;
-}
-
-static void of_free_probes(const char * const *probes)
-{
-	if (probes != part_probe_types_def)
-		kfree(probes);
-}
-
-static const struct of_device_id of_flash_match[];
-static int of_flash_probe(struct platform_device *dev)
-{
-	const char * const *part_probe_types;
-	const struct of_device_id *match;
-	struct device_node *dp = dev->dev.of_node;
-	struct resource res;
-	struct of_flash *info;
-	const char *probe_type;
-	const __be32 *width;
-	int err;
-	int i;
-	int count;
-	const __be32 *p;
-	int reg_tuple_size;
-	struct mtd_info **mtd_list = NULL;
-	resource_size_t res_size;
-	bool map_indirect;
-	const char *mtd_name = NULL;
-
-	match = of_match_device(of_flash_match, &dev->dev);
-	if (!match)
-		return -EINVAL;
-	probe_type = match->data;
-
-	reg_tuple_size = (of_n_addr_cells(dp) + of_n_size_cells(dp)) * sizeof(u32);
-
-	of_property_read_string(dp, "linux,mtd-name", &mtd_name);
-
-	/*
-	 * Get number of "reg" tuples. Scan for MTD devices on area's
-	 * described by each "reg" region. This makes it possible (including
-	 * the concat support) to support the Intel P30 48F4400 chips which
-	 * consists internally of 2 non-identical NOR chips on one die.
-	 */
-	p = of_get_property(dp, "reg", &count);
-	if (!p || count % reg_tuple_size != 0) {
-		dev_err(&dev->dev, "Malformed reg property on %pOF\n",
-				dev->dev.of_node);
-		err = -EINVAL;
-		goto err_flash_remove;
-	}
-	count /= reg_tuple_size;
-
-	map_indirect = of_property_read_bool(dp, "no-unaligned-direct-access");
-
-	err = -ENOMEM;
-	info = devm_kzalloc(&dev->dev,
-			    sizeof(struct of_flash) +
-			    sizeof(struct of_flash_list) * count, GFP_KERNEL);
-	if (!info)
-		goto err_flash_remove;
-
-	dev_set_drvdata(&dev->dev, info);
-
-	mtd_list = kcalloc(count, sizeof(*mtd_list), GFP_KERNEL);
-	if (!mtd_list)
-		goto err_flash_remove;
-
-	for (i = 0; i < count; i++) {
-		err = -ENXIO;
-		if (of_address_to_resource(dp, i, &res)) {
-			/*
-			 * Continue with next register tuple if this
-			 * one is not mappable
-			 */
-			continue;
-		}
-
-		dev_dbg(&dev->dev, "of_flash device: %pR\n", &res);
-
-		err = -EBUSY;
-		res_size = resource_size(&res);
-		info->list[i].map.virt = devm_ioremap_resource(&dev->dev, &res);
-		if (IS_ERR(info->list[i].map.virt)) {
-			err = PTR_ERR(info->list[i].map.virt);
-			goto err_out;
-		}
-
-		err = -ENXIO;
-		width = of_get_property(dp, "bank-width", NULL);
-		if (!width) {
-			dev_err(&dev->dev, "Can't get bank width from device"
-				" tree\n");
-			goto err_out;
-		}
-
-		info->list[i].map.name = mtd_name ?: dev_name(&dev->dev);
-		info->list[i].map.phys = res.start;
-		info->list[i].map.size = res_size;
-		info->list[i].map.bankwidth = be32_to_cpup(width);
-		info->list[i].map.device_node = dp;
-
-		if (of_property_read_bool(dp, "big-endian"))
-			info->list[i].map.swap = CFI_BIG_ENDIAN;
-		else if (of_property_read_bool(dp, "little-endian"))
-			info->list[i].map.swap = CFI_LITTLE_ENDIAN;
-
-		err = of_flash_probe_gemini(dev, dp, &info->list[i].map);
-		if (err)
-			goto err_out;
-		err = of_flash_probe_versatile(dev, dp, &info->list[i].map);
-		if (err)
-			goto err_out;
-
-		simple_map_init(&info->list[i].map);
-
-		/*
-		 * On some platforms (e.g. MPC5200) a direct 1:1 mapping
-		 * may cause problems with JFFS2 usage, as the local bus (LPB)
-		 * doesn't support unaligned accesses as implemented in the
-		 * JFFS2 code via memcpy(). By setting NO_XIP, the
-		 * flash will not be exposed directly to the MTD users
-		 * (e.g. JFFS2) any more.
-		 */
-		if (map_indirect)
-			info->list[i].map.phys = NO_XIP;
-
-		if (probe_type) {
-			info->list[i].mtd = do_map_probe(probe_type,
-							 &info->list[i].map);
-		} else {
-			info->list[i].mtd = obsolete_probe(dev,
-							   &info->list[i].map);
-		}
-
-		/* Fall back to mapping region as ROM */
-		if (!info->list[i].mtd) {
-			dev_warn(&dev->dev,
-				"do_map_probe() failed for type %s\n",
-				 probe_type);
-
-			info->list[i].mtd = do_map_probe("map_rom",
-							 &info->list[i].map);
-		}
-		mtd_list[i] = info->list[i].mtd;
-
-		err = -ENXIO;
-		if (!info->list[i].mtd) {
-			dev_err(&dev->dev, "do_map_probe() failed\n");
-			goto err_out;
-		} else {
-			info->list_size++;
-		}
-		info->list[i].mtd->dev.parent = &dev->dev;
-	}
-
-	err = 0;
-	info->cmtd = NULL;
-	if (info->list_size == 1) {
-		info->cmtd = info->list[0].mtd;
-	} else if (info->list_size > 1) {
-		/*
-		 * We detected multiple devices. Concatenate them together.
-		 */
-		info->cmtd = mtd_concat_create(mtd_list, info->list_size,
-					       dev_name(&dev->dev));
-	}
-	if (info->cmtd == NULL)
-		err = -ENXIO;
-
-	if (err)
-		goto err_out;
-
-	info->cmtd->dev.parent = &dev->dev;
-	mtd_set_of_node(info->cmtd, dp);
-	part_probe_types = of_get_probes(dp);
-	if (!part_probe_types) {
-		err = -ENOMEM;
-		goto err_out;
-	}
-	mtd_device_parse_register(info->cmtd, part_probe_types, NULL,
-			NULL, 0);
-	of_free_probes(part_probe_types);
-
-	kfree(mtd_list);
-
-	return 0;
-
-err_out:
-	kfree(mtd_list);
-err_flash_remove:
-	of_flash_remove(dev);
-
-	return err;
-}
-
-static const struct of_device_id of_flash_match[] = {
-	{
-		.compatible	= "cfi-flash",
-		.data		= (void *)"cfi_probe",
-	},
-	{
-		/* FIXME: JEDEC chips can't be safely and reliably
-		 * probed, although the mtd code gets it right in
-		 * practice most of the time.  We should use the
-		 * vendor and device ids specified by the binding to
-		 * bypass the heuristic probe code, but the mtd layer
-		 * provides, at present, no interface for doing so
-		 * :(. */
-		.compatible	= "jedec-flash",
-		.data		= (void *)"jedec_probe",
-	},
-	{
-		.compatible     = "mtd-ram",
-		.data           = (void *)"map_ram",
-	},
-	{
-		.compatible     = "mtd-rom",
-		.data           = (void *)"map_rom",
-	},
-	{
-		.type		= "rom",
-		.compatible	= "direct-mapped"
-	},
-	{ },
-};
-MODULE_DEVICE_TABLE(of, of_flash_match);
-
-static struct platform_driver of_flash_driver = {
-	.driver = {
-		.name = "of-flash",
-		.of_match_table = of_flash_match,
-	},
-	.probe		= of_flash_probe,
-	.remove		= of_flash_remove,
-};
-
-module_platform_driver(of_flash_driver);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Vitaly Wool <vwool@ru.mvista.com>");
-MODULE_DESCRIPTION("Device tree based MTD map driver");