[deliverable/linux.git] / drivers / mtd / maps / physmap_of.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/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/slab.h>

struct of_flash_list {
	struct mtd_info *mtd;
	struct map_info map;
	struct resource *res;
};

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);

		if (info->list[i].map.virt)
			iounmap(info->list[i].map.virt);

		if (info->list[i].res) {
			release_resource(info->list[i].res);
			kfree(info->list[i].res);
		}
	}
	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 *cp;
	int cplen;
	unsigned int l;
	unsigned int count;
	const char **res;

	cp = of_get_property(dp, "linux,part-probe", &cplen);
	if (cp == NULL)
		return part_probe_types_def;

	count = 0;
	for (l = 0; l != cplen; l++)
		if (cp[l] == 0)
			count++;

	res = kzalloc((count + 1)*sizeof(*res), GFP_KERNEL);
	if (!res)
		return NULL;
	count = 0;
	while (cplen > 0) {
		res[count] = cp;
		l = strlen(cp) + 1;
		cp += l;
		cplen -= l;
		count++;
	}
	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 (count % reg_tuple_size != 0) {
		dev_err(&dev->dev, "Malformed reg property on %s\n",
				dev->dev.of_node->full_name);
		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 = kzalloc(sizeof(*mtd_list) * count, 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].res = request_mem_region(res.start, res_size,
						       dev_name(&dev->dev));
		if (!info->list[i].res)
			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;

		err = -ENOMEM;
		info->list[i].map.virt = ioremap(info->list[i].map.phys,
						 info->list[i].map.size);
		if (!info->list[i].map.virt) {
			dev_err(&dev->dev, "Failed to ioremap() flash"
				" region\n");
			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;

	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");
Commit	Line	Data
a2c2fe4b	1	/*
c4d5e375	2	* Flash mappings described by the OF (or flattened) device tree
a2c2fe4b VW	3	*
	4	* Copyright (C) 2006 MontaVista Software Inc.
	5	* Author: Vitaly Wool <vwool@ru.mvista.com>
	6	*
2099172d DG	7	* Revised to handle newer style flash binding by:
	8	* Copyright (C) 2007 David Gibson, IBM Corporation.
	9	*
a2c2fe4b VW	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/types.h>
a2c2fe4b VW	18	#include <linux/device.h>
	19	#include <linux/mtd/mtd.h>
	20	#include <linux/mtd/map.h>
	21	#include <linux/mtd/partitions.h>
143070e7	22	#include <linux/mtd/concat.h>
c4d5e375	23	#include <linux/of.h>
7a50d06e	24	#include <linux/of_address.h>
c4d5e375	25	#include <linux/of_platform.h>
5a0e3ad6	26	#include <linux/slab.h>
a2c2fe4b	27
143070e7 SR	28	struct of_flash_list {
	29	struct mtd_info *mtd;
	30	struct map_info map;
	31	struct resource *res;
	32	};
	33
c4d5e375	34	struct of_flash {
143070e7	35	struct mtd_info *cmtd;
143070e7 SR	36	int list_size; /* number of elements in of_flash_list */
143070e7 SR	37	struct of_flash_list list[0];
a2c2fe4b VW	38	};
a2c2fe4b VW	39
2dc11581	40	static int of_flash_remove(struct platform_device *dev)
a2c2fe4b	41	{
c4d5e375	42	struct of_flash *info;
143070e7	43	int i;
a2c2fe4b VW	44
a2c2fe4b VW	45	info = dev_get_drvdata(&dev->dev);
c4d5e375	46	if (!info)
a2c2fe4b VW	47	return 0;
	48	dev_set_drvdata(&dev->dev, NULL);
	49
92b633a8	50	if (info->cmtd) {
984e6d8e	51	mtd_device_unregister(info->cmtd);
92b633a8 AB	52	if (info->cmtd != info->list[0].mtd)
92b633a8 AB	53	mtd_concat_destroy(info->cmtd);
143070e7	54	}
143070e7	55
143070e7 SR	56	for (i = 0; i < info->list_size; i++) {
	57	if (info->list[i].mtd)
	58	map_destroy(info->list[i].mtd);
a2c2fe4b	59
143070e7 SR	60	if (info->list[i].map.virt)
	61	iounmap(info->list[i].map.virt);
	62
	63	if (info->list[i].res) {
	64	release_resource(info->list[i].res);
	65	kfree(info->list[i].res);
	66	}
a2c2fe4b	67	}
a2c2fe4b VW	68	return 0;
	69	}
	70
cce2a026 AB	71	static const char * const rom_probe_types[] = {
	72	"cfi_probe", "jedec_probe", "map_rom" };
	73
2099172d DG	74	/* Helper function to handle probing of the obsolete "direct-mapped"
	75	* compatible binding, which has an extra "probe-type" property
	76	* describing the type of flash probe necessary. */
06f25510	77	static struct mtd_info obsolete_probe(struct platform_device dev,
d8929942	78	struct map_info *map)
a2c2fe4b	79	{
61c7a080	80	struct device_node *dp = dev->dev.of_node;
a2c2fe4b	81	const char *of_probe;
2099172d	82	struct mtd_info *mtd;
2099172d DG	83	int i;
	84
	85	dev_warn(&dev->dev, "Device tree uses obsolete \"direct-mapped\" "
	86	"flash binding\n");
	87
	88	of_probe = of_get_property(dp, "probe-type", NULL);
	89	if (!of_probe) {
	90	for (i = 0; i < ARRAY_SIZE(rom_probe_types); i++) {
	91	mtd = do_map_probe(rom_probe_types[i], map);
	92	if (mtd)
	93	return mtd;
	94	}
	95	return NULL;
	96	} else if (strcmp(of_probe, "CFI") == 0) {
	97	return do_map_probe("cfi_probe", map);
	98	} else if (strcmp(of_probe, "JEDEC") == 0) {
	99	return do_map_probe("jedec_probe", map);
	100	} else {
	101	if (strcmp(of_probe, "ROM") != 0)
c4d5e375 DG	102	dev_warn(&dev->dev, "obsolete_probe: don't know probe "
c4d5e375 DG	103	"type '%s', mapping as rom\n", of_probe);
9b07a8d1	104	return do_map_probe("map_rom", map);
2099172d DG	105	}
	106	}
	107
9d5da3a9 JG	108	/* When partitions are set we look for a linux,part-probe property which
	109	specifies the list of partition probers to use. If none is given then the
	110	default is use. These take precedence over other device tree
	111	information. */
cce2a026 AB	112	static const char * const part_probe_types_def[] = {
	113	"cmdlinepart", "RedBoot", "ofpart", "ofoldpart", NULL };
	114
	115	static const char * const of_get_probes(struct device_node dp)
9d5da3a9 JG	116	{
	117	const char *cp;
	118	int cplen;
	119	unsigned int l;
	120	unsigned int count;
	121	const char **res;
	122
	123	cp = of_get_property(dp, "linux,part-probe", &cplen);
	124	if (cp == NULL)
	125	return part_probe_types_def;
	126
	127	count = 0;
	128	for (l = 0; l != cplen; l++)
	129	if (cp[l] == 0)
	130	count++;
	131
	132	res = kzalloc((count + 1)sizeof(res), GFP_KERNEL);
7e0c19c9 CIK	133	if (!res)
7e0c19c9 CIK	134	return NULL;
9d5da3a9 JG	135	count = 0;
	136	while (cplen > 0) {
	137	res[count] = cp;
	138	l = strlen(cp) + 1;
	139	cp += l;
	140	cplen -= l;
	141	count++;
	142	}
	143	return res;
	144	}
	145
cce2a026	146	static void of_free_probes(const char * const *probes)
9d5da3a9 JG	147	{
	148	if (probes != part_probe_types_def)
	149	kfree(probes);
	150	}
9d5da3a9	151
66610443	152	static const struct of_device_id of_flash_match[];
06f25510	153	static int of_flash_probe(struct platform_device *dev)
a2c2fe4b	154	{
cce2a026	155	const char * const *part_probe_types;
b1608d69	156	const struct of_device_id *match;
61c7a080	157	struct device_node *dp = dev->dev.of_node;
a2c2fe4b	158	struct resource res;
c4d5e375	159	struct of_flash *info;
1c48a5c9	160	const char *probe_type;
766f271a	161	const __be32 *width;
a2c2fe4b	162	int err;
143070e7 SR	163	int i;
143070e7 SR	164	int count;
766f271a	165	const __be32 *p;
143070e7 SR	166	int reg_tuple_size;
143070e7 SR	167	struct mtd_info **mtd_list = NULL;
2763c508	168	resource_size_t res_size;
d0788ce4	169	bool map_indirect;
7dfe4be3	170	const char *mtd_name = NULL;
143070e7	171
b1608d69 GL	172	match = of_match_device(of_flash_match, &dev->dev);
b1608d69 GL	173	if (!match)
1c48a5c9	174	return -EINVAL;
b1608d69	175	probe_type = match->data;
1c48a5c9	176
143070e7 SR	177	reg_tuple_size = (of_n_addr_cells(dp) + of_n_size_cells(dp)) * sizeof(u32);
143070e7 SR	178
d68cbdd4 JCPV	179	of_property_read_string(dp, "linux,mtd-name", &mtd_name);
d68cbdd4 JCPV	180
143070e7 SR	181	/*
	182	* Get number of "reg" tuples. Scan for MTD devices on area's
	183	* described by each "reg" region. This makes it possible (including
	184	* the concat support) to support the Intel P30 48F4400 chips which
	185	* consists internally of 2 non-identical NOR chips on one die.
	186	*/
	187	p = of_get_property(dp, "reg", &count);
	188	if (count % reg_tuple_size != 0) {
	189	dev_err(&dev->dev, "Malformed reg property on %s\n",
61c7a080	190	dev->dev.of_node->full_name);
143070e7	191	err = -EINVAL;
ad4fbc79	192	goto err_flash_remove;
a2c2fe4b	193	}
143070e7	194	count /= reg_tuple_size;
a2c2fe4b	195
d0788ce4 SR	196	map_indirect = of_property_read_bool(dp, "no-unaligned-direct-access");
d0788ce4 SR	197
c4d5e375	198	err = -ENOMEM;
eb82038f EG	199	info = devm_kzalloc(&dev->dev,
	200	sizeof(struct of_flash) +
	201	sizeof(struct of_flash_list) * count, GFP_KERNEL);
143070e7	202	if (!info)
ad4fbc79	203	goto err_flash_remove;
a2c2fe4b VW	204
	205	dev_set_drvdata(&dev->dev, info);
	206
e026255f	207	mtd_list = kzalloc(sizeof(mtd_list) count, GFP_KERNEL);
ad4fbc79	208	if (!mtd_list)
	209	goto err_flash_remove;
	210
143070e7 SR	211	for (i = 0; i < count; i++) {
	212	err = -ENXIO;
	213	if (of_address_to_resource(dp, i, &res)) {
940fe282 SR	214	/*
	215	* Continue with next register tuple if this
	216	* one is not mappable
	217	*/
	218	continue;
143070e7	219	}
a2c2fe4b	220
f9a5279c	221	dev_dbg(&dev->dev, "of_flash device: %pR\n", &res);
143070e7 SR	222
143070e7 SR	223	err = -EBUSY;
2763c508 WS	224	res_size = resource_size(&res);
2763c508 WS	225	info->list[i].res = request_mem_region(res.start, res_size,
143070e7 SR	226	dev_name(&dev->dev));
	227	if (!info->list[i].res)
	228	goto err_out;
	229
	230	err = -ENXIO;
	231	width = of_get_property(dp, "bank-width", NULL);
	232	if (!width) {
	233	dev_err(&dev->dev, "Can't get bank width from device"
	234	" tree\n");
	235	goto err_out;
	236	}
a2c2fe4b	237
d68cbdd4	238	info->list[i].map.name = mtd_name ?: dev_name(&dev->dev);
143070e7	239	info->list[i].map.phys = res.start;
2763c508	240	info->list[i].map.size = res_size;
766f271a	241	info->list[i].map.bankwidth = be32_to_cpup(width);
1648eaaa	242	info->list[i].map.device_node = dp;
143070e7 SR	243
	244	err = -ENOMEM;
	245	info->list[i].map.virt = ioremap(info->list[i].map.phys,
	246	info->list[i].map.size);
	247	if (!info->list[i].map.virt) {
	248	dev_err(&dev->dev, "Failed to ioremap() flash"
	249	" region\n");
	250	goto err_out;
	251	}
a2c2fe4b	252
143070e7	253	simple_map_init(&info->list[i].map);
a2c2fe4b	254
d0788ce4 SR	255	/*
	256	* On some platforms (e.g. MPC5200) a direct 1:1 mapping
	257	* may cause problems with JFFS2 usage, as the local bus (LPB)
	258	* doesn't support unaligned accesses as implemented in the
	259	* JFFS2 code via memcpy(). By setting NO_XIP, the
	260	* flash will not be exposed directly to the MTD users
	261	* (e.g. JFFS2) any more.
	262	*/
	263	if (map_indirect)
	264	info->list[i].map.phys = NO_XIP;
	265
143070e7 SR	266	if (probe_type) {
	267	info->list[i].mtd = do_map_probe(probe_type,
	268	&info->list[i].map);
	269	} else {
	270	info->list[i].mtd = obsolete_probe(dev,
	271	&info->list[i].map);
	272	}
3fc1cf5f JS	273
	274	/* Fall back to mapping region as ROM */
	275	if (!info->list[i].mtd) {
	276	dev_warn(&dev->dev,
	277	"do_map_probe() failed for type %s\n",
	278	probe_type);
	279
	280	info->list[i].mtd = do_map_probe("map_rom",
	281	&info->list[i].map);
	282	}
143070e7	283	mtd_list[i] = info->list[i].mtd;
a2c2fe4b	284
143070e7 SR	285	err = -ENXIO;
	286	if (!info->list[i].mtd) {
	287	dev_err(&dev->dev, "do_map_probe() failed\n");
	288	goto err_out;
	289	} else {
	290	info->list_size++;
	291	}
143070e7 SR	292	info->list[i].mtd->dev.parent = &dev->dev;
143070e7 SR	293	}
2099172d	294
143070e7	295	err = 0;
e58a66d8	296	info->cmtd = NULL;
143070e7 SR	297	if (info->list_size == 1) {
	298	info->cmtd = info->list[0].mtd;
	299	} else if (info->list_size > 1) {
	300	/*
	301	* We detected multiple devices. Concatenate them together.
	302	*/
143070e7 SR	303	info->cmtd = mtd_concat_create(mtd_list, info->list_size,
143070e7 SR	304	dev_name(&dev->dev));
a2c2fe4b	305	}
e58a66d8 AP	306	if (info->cmtd == NULL)
	307	err = -ENXIO;
	308
143070e7 SR	309	if (err)
143070e7 SR	310	goto err_out;
a2c2fe4b	311
004b5e60	312	mtd_set_of_node(info->cmtd, dp);
9d5da3a9	313	part_probe_types = of_get_probes(dp);
7e0c19c9 CIK	314	if (!part_probe_types) {
	315	err = -ENOMEM;
	316	goto err_out;
	317	}
004b5e60	318	mtd_device_parse_register(info->cmtd, part_probe_types, NULL,
f44dcbd0	319	NULL, 0);
9d5da3a9	320	of_free_probes(part_probe_types);
9a310d21	321
143070e7	322	kfree(mtd_list);
a2c2fe4b	323
a2c2fe4b VW	324	return 0;
	325
	326	err_out:
143070e7	327	kfree(mtd_list);
ad4fbc79	328	err_flash_remove:
c4d5e375	329	of_flash_remove(dev);
143070e7	330
a2c2fe4b	331	return err;
a2c2fe4b VW	332	}
a2c2fe4b VW	333
66610443	334	static const struct of_device_id of_flash_match[] = {
2099172d DG	335	{
	336	.compatible = "cfi-flash",
	337	.data = (void *)"cfi_probe",
	338	},
	339	{
	340	/* FIXME: JEDEC chips can't be safely and reliably
	341	* probed, although the mtd code gets it right in
	342	* practice most of the time. We should use the
	343	* vendor and device ids specified by the binding to
	344	* bypass the heuristic probe code, but the mtd layer
	345	* provides, at present, no interface for doing so
	346	* :(. */
	347	.compatible = "jedec-flash",
	348	.data = (void *)"jedec_probe",
	349	},
fc28c39f WS	350	{
	351	.compatible = "mtd-ram",
	352	.data = (void *)"map_ram",
	353	},
e5bffb59 AS	354	{
	355	.compatible = "mtd-rom",
	356	.data = (void *)"map_rom",
	357	},
a2c2fe4b VW	358	{
	359	.type = "rom",
	360	.compatible = "direct-mapped"
	361	},
	362	{ },
	363	};
c4d5e375	364	MODULE_DEVICE_TABLE(of, of_flash_match);
a2c2fe4b	365
1c48a5c9	366	static struct platform_driver of_flash_driver = {
4018294b GL	367	.driver = {
4018294b GL	368	.name = "of-flash",
4018294b GL	369	.of_match_table = of_flash_match,
4018294b GL	370	},
c4d5e375 DG	371	.probe = of_flash_probe,
c4d5e375 DG	372	.remove = of_flash_remove,
a2c2fe4b VW	373	};
a2c2fe4b VW	374
f99640de	375	module_platform_driver(of_flash_driver);
a2c2fe4b VW	376
	377	MODULE_LICENSE("GPL");
	378	MODULE_AUTHOR("Vitaly Wool <vwool@ru.mvista.com>");
c4d5e375	379	MODULE_DESCRIPTION("Device tree based MTD map driver");