[linux-2.6-block.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/init.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 != info->list[0].mtd) {
		mtd_device_unregister(info->cmtd);
		mtd_concat_destroy(info->cmtd);
	}

	if (info->cmtd)
		mtd_device_unregister(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);
		}
	}

	kfree(info);

	return 0;
}

/* 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;
	static const char *rom_probe_types[]
		= { "cfi_probe", "jedec_probe", "map_rom"};
	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("mtd_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 *part_probe_types_def[] = { "cmdlinepart", "RedBoot",
					"ofpart", "ofoldpart", NULL };
static const char **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);
	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 **probes)
{
	if (probes != part_probe_types_def)
		kfree(probes);
}

static struct of_device_id of_flash_match[];
static int of_flash_probe(struct platform_device *dev)
{
	const char **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;
	struct mtd_part_parser_data ppdata;
	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 = kzalloc(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);

		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);
		}
		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->owner = THIS_MODULE;
		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;

	ppdata.of_node = dp;
	part_probe_types = of_get_probes(dp);
	mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
			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 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",
	},
	{
		.type		= "rom",
		.compatible	= "direct-mapped"
	},
	{ },
};
MODULE_DEVICE_TABLE(of, of_flash_match);

static struct platform_driver of_flash_driver = {
	.driver = {
		.name = "of-flash",
		.owner = THIS_MODULE,
		.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	18	#include <linux/init.h>
a2c2fe4b VW	19	#include <linux/device.h>
	20	#include <linux/mtd/mtd.h>
	21	#include <linux/mtd/map.h>
	22	#include <linux/mtd/partitions.h>
143070e7	23	#include <linux/mtd/concat.h>
c4d5e375	24	#include <linux/of.h>
7a50d06e	25	#include <linux/of_address.h>
c4d5e375	26	#include <linux/of_platform.h>
5a0e3ad6	27	#include <linux/slab.h>
a2c2fe4b	28
143070e7 SR	29	struct of_flash_list {
	30	struct mtd_info *mtd;
	31	struct map_info map;
	32	struct resource *res;
	33	};
	34
c4d5e375	35	struct of_flash {
143070e7	36	struct mtd_info *cmtd;
143070e7 SR	37	int list_size; /* number of elements in of_flash_list */
143070e7 SR	38	struct of_flash_list list[0];
a2c2fe4b VW	39	};
a2c2fe4b VW	40
2dc11581	41	static int of_flash_remove(struct platform_device *dev)
a2c2fe4b	42	{
c4d5e375	43	struct of_flash *info;
143070e7	44	int i;
a2c2fe4b VW	45
a2c2fe4b VW	46	info = dev_get_drvdata(&dev->dev);
c4d5e375	47	if (!info)
a2c2fe4b VW	48	return 0;
	49	dev_set_drvdata(&dev->dev, NULL);
	50
143070e7	51	if (info->cmtd != info->list[0].mtd) {
984e6d8e	52	mtd_device_unregister(info->cmtd);
143070e7 SR	53	mtd_concat_destroy(info->cmtd);
143070e7 SR	54	}
143070e7	55
f44dcbd0	56	if (info->cmtd)
984e6d8e	57	mtd_device_unregister(info->cmtd);
a2c2fe4b	58
143070e7 SR	59	for (i = 0; i < info->list_size; i++) {
	60	if (info->list[i].mtd)
	61	map_destroy(info->list[i].mtd);
a2c2fe4b	62
143070e7 SR	63	if (info->list[i].map.virt)
	64	iounmap(info->list[i].map.virt);
	65
	66	if (info->list[i].res) {
	67	release_resource(info->list[i].res);
	68	kfree(info->list[i].res);
	69	}
a2c2fe4b VW	70	}
a2c2fe4b VW	71
143070e7 SR	72	kfree(info);
143070e7 SR	73
a2c2fe4b VW	74	return 0;
	75	}
	76
2099172d DG	77	/* Helper function to handle probing of the obsolete "direct-mapped"
	78	* compatible binding, which has an extra "probe-type" property
	79	* describing the type of flash probe necessary. */
06f25510	80	static struct mtd_info obsolete_probe(struct platform_device dev,
2099172d	81	struct map_info *map)
a2c2fe4b	82	{
61c7a080	83	struct device_node *dp = dev->dev.of_node;
a2c2fe4b	84	const char *of_probe;
2099172d DG	85	struct mtd_info *mtd;
	86	static const char *rom_probe_types[]
	87	= { "cfi_probe", "jedec_probe", "map_rom"};
	88	int i;
	89
	90	dev_warn(&dev->dev, "Device tree uses obsolete \"direct-mapped\" "
	91	"flash binding\n");
	92
	93	of_probe = of_get_property(dp, "probe-type", NULL);
	94	if (!of_probe) {
	95	for (i = 0; i < ARRAY_SIZE(rom_probe_types); i++) {
	96	mtd = do_map_probe(rom_probe_types[i], map);
	97	if (mtd)
	98	return mtd;
	99	}
	100	return NULL;
	101	} else if (strcmp(of_probe, "CFI") == 0) {
	102	return do_map_probe("cfi_probe", map);
	103	} else if (strcmp(of_probe, "JEDEC") == 0) {
	104	return do_map_probe("jedec_probe", map);
	105	} else {
	106	if (strcmp(of_probe, "ROM") != 0)
c4d5e375 DG	107	dev_warn(&dev->dev, "obsolete_probe: don't know probe "
c4d5e375 DG	108	"type '%s', mapping as rom\n", of_probe);
2099172d DG	109	return do_map_probe("mtd_rom", map);
	110	}
	111	}
	112
9d5da3a9 JG	113	/* When partitions are set we look for a linux,part-probe property which
	114	specifies the list of partition probers to use. If none is given then the
	115	default is use. These take precedence over other device tree
	116	information. */
5f4ba9f9	117	static const char *part_probe_types_def[] = { "cmdlinepart", "RedBoot",
fbcf62a3	118	"ofpart", "ofoldpart", NULL };
06f25510	119	static const char *of_get_probes(struct device_node dp)
9d5da3a9 JG	120	{
	121	const char *cp;
	122	int cplen;
	123	unsigned int l;
	124	unsigned int count;
	125	const char **res;
	126
	127	cp = of_get_property(dp, "linux,part-probe", &cplen);
	128	if (cp == NULL)
	129	return part_probe_types_def;
	130
	131	count = 0;
	132	for (l = 0; l != cplen; l++)
	133	if (cp[l] == 0)
	134	count++;
	135
	136	res = kzalloc((count + 1)sizeof(res), GFP_KERNEL);
	137	count = 0;
	138	while (cplen > 0) {
	139	res[count] = cp;
	140	l = strlen(cp) + 1;
	141	cp += l;
	142	cplen -= l;
	143	count++;
	144	}
	145	return res;
	146	}
	147
06f25510	148	static void of_free_probes(const char **probes)
9d5da3a9 JG	149	{
	150	if (probes != part_probe_types_def)
	151	kfree(probes);
	152	}
9d5da3a9	153
b1608d69	154	static struct of_device_id of_flash_match[];
06f25510	155	static int of_flash_probe(struct platform_device *dev)
a2c2fe4b	156	{
9d5da3a9	157	const char **part_probe_types;
b1608d69	158	const struct of_device_id *match;
61c7a080	159	struct device_node *dp = dev->dev.of_node;
a2c2fe4b	160	struct resource res;
c4d5e375	161	struct of_flash *info;
1c48a5c9	162	const char *probe_type;
766f271a	163	const __be32 *width;
a2c2fe4b	164	int err;
143070e7 SR	165	int i;
143070e7 SR	166	int count;
766f271a	167	const __be32 *p;
143070e7 SR	168	int reg_tuple_size;
143070e7 SR	169	struct mtd_info **mtd_list = NULL;
2763c508	170	resource_size_t res_size;
5f4ba9f9	171	struct mtd_part_parser_data ppdata;
d0788ce4	172	bool map_indirect;
7dfe4be3	173	const char *mtd_name = NULL;
143070e7	174
b1608d69 GL	175	match = of_match_device(of_flash_match, &dev->dev);
b1608d69 GL	176	if (!match)
1c48a5c9	177	return -EINVAL;
b1608d69	178	probe_type = match->data;
1c48a5c9	179
143070e7 SR	180	reg_tuple_size = (of_n_addr_cells(dp) + of_n_size_cells(dp)) * sizeof(u32);
143070e7 SR	181
d68cbdd4 JCPV	182	of_property_read_string(dp, "linux,mtd-name", &mtd_name);
d68cbdd4 JCPV	183
143070e7 SR	184	/*
	185	* Get number of "reg" tuples. Scan for MTD devices on area's
	186	* described by each "reg" region. This makes it possible (including
	187	* the concat support) to support the Intel P30 48F4400 chips which
	188	* consists internally of 2 non-identical NOR chips on one die.
	189	*/
	190	p = of_get_property(dp, "reg", &count);
	191	if (count % reg_tuple_size != 0) {
	192	dev_err(&dev->dev, "Malformed reg property on %s\n",
61c7a080	193	dev->dev.of_node->full_name);
143070e7	194	err = -EINVAL;
ad4fbc79	195	goto err_flash_remove;
a2c2fe4b	196	}
143070e7	197	count /= reg_tuple_size;
a2c2fe4b	198
d0788ce4 SR	199	map_indirect = of_property_read_bool(dp, "no-unaligned-direct-access");
d0788ce4 SR	200
c4d5e375	201	err = -ENOMEM;
143070e7 SR	202	info = kzalloc(sizeof(struct of_flash) +
	203	sizeof(struct of_flash_list) * count, GFP_KERNEL);
	204	if (!info)
ad4fbc79	205	goto err_flash_remove;
a2c2fe4b VW	206
	207	dev_set_drvdata(&dev->dev, info);
	208
e026255f	209	mtd_list = kzalloc(sizeof(mtd_list) count, GFP_KERNEL);
ad4fbc79	210	if (!mtd_list)
	211	goto err_flash_remove;
	212
143070e7 SR	213	for (i = 0; i < count; i++) {
	214	err = -ENXIO;
	215	if (of_address_to_resource(dp, i, &res)) {
940fe282 SR	216	/*
	217	* Continue with next register tuple if this
	218	* one is not mappable
	219	*/
	220	continue;
143070e7	221	}
a2c2fe4b	222
f9a5279c	223	dev_dbg(&dev->dev, "of_flash device: %pR\n", &res);
143070e7 SR	224
143070e7 SR	225	err = -EBUSY;
2763c508 WS	226	res_size = resource_size(&res);
2763c508 WS	227	info->list[i].res = request_mem_region(res.start, res_size,
143070e7 SR	228	dev_name(&dev->dev));
	229	if (!info->list[i].res)
	230	goto err_out;
	231
	232	err = -ENXIO;
	233	width = of_get_property(dp, "bank-width", NULL);
	234	if (!width) {
	235	dev_err(&dev->dev, "Can't get bank width from device"
	236	" tree\n");
	237	goto err_out;
	238	}
a2c2fe4b	239
d68cbdd4	240	info->list[i].map.name = mtd_name ?: dev_name(&dev->dev);
143070e7	241	info->list[i].map.phys = res.start;
2763c508	242	info->list[i].map.size = res_size;
766f271a	243	info->list[i].map.bankwidth = be32_to_cpup(width);
143070e7 SR	244
	245	err = -ENOMEM;
	246	info->list[i].map.virt = ioremap(info->list[i].map.phys,
	247	info->list[i].map.size);
	248	if (!info->list[i].map.virt) {
	249	dev_err(&dev->dev, "Failed to ioremap() flash"
	250	" region\n");
	251	goto err_out;
	252	}
a2c2fe4b	253
143070e7	254	simple_map_init(&info->list[i].map);
a2c2fe4b	255
d0788ce4 SR	256	/*
	257	* On some platforms (e.g. MPC5200) a direct 1:1 mapping
	258	* may cause problems with JFFS2 usage, as the local bus (LPB)
	259	* doesn't support unaligned accesses as implemented in the
	260	* JFFS2 code via memcpy(). By setting NO_XIP, the
	261	* flash will not be exposed directly to the MTD users
	262	* (e.g. JFFS2) any more.
	263	*/
	264	if (map_indirect)
	265	info->list[i].map.phys = NO_XIP;
	266
143070e7 SR	267	if (probe_type) {
	268	info->list[i].mtd = do_map_probe(probe_type,
	269	&info->list[i].map);
	270	} else {
	271	info->list[i].mtd = obsolete_probe(dev,
	272	&info->list[i].map);
	273	}
	274	mtd_list[i] = info->list[i].mtd;
a2c2fe4b	275
143070e7 SR	276	err = -ENXIO;
	277	if (!info->list[i].mtd) {
	278	dev_err(&dev->dev, "do_map_probe() failed\n");
	279	goto err_out;
	280	} else {
	281	info->list_size++;
	282	}
	283	info->list[i].mtd->owner = THIS_MODULE;
	284	info->list[i].mtd->dev.parent = &dev->dev;
	285	}
2099172d	286
143070e7	287	err = 0;
e58a66d8	288	info->cmtd = NULL;
143070e7 SR	289	if (info->list_size == 1) {
	290	info->cmtd = info->list[0].mtd;
	291	} else if (info->list_size > 1) {
	292	/*
	293	* We detected multiple devices. Concatenate them together.
	294	*/
143070e7 SR	295	info->cmtd = mtd_concat_create(mtd_list, info->list_size,
143070e7 SR	296	dev_name(&dev->dev));
a2c2fe4b	297	}
e58a66d8 AP	298	if (info->cmtd == NULL)
	299	err = -ENXIO;
	300
143070e7 SR	301	if (err)
143070e7 SR	302	goto err_out;
a2c2fe4b	303
5f4ba9f9	304	ppdata.of_node = dp;
9d5da3a9	305	part_probe_types = of_get_probes(dp);
f44dcbd0 DES	306	mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
f44dcbd0 DES	307	NULL, 0);
9d5da3a9	308	of_free_probes(part_probe_types);
9a310d21	309
143070e7	310	kfree(mtd_list);
a2c2fe4b	311
a2c2fe4b VW	312	return 0;
	313
	314	err_out:
143070e7	315	kfree(mtd_list);
ad4fbc79	316	err_flash_remove:
c4d5e375	317	of_flash_remove(dev);
143070e7	318
a2c2fe4b	319	return err;
a2c2fe4b VW	320	}
a2c2fe4b VW	321
c4d5e375	322	static struct of_device_id of_flash_match[] = {
2099172d DG	323	{
	324	.compatible = "cfi-flash",
	325	.data = (void *)"cfi_probe",
	326	},
	327	{
	328	/* FIXME: JEDEC chips can't be safely and reliably
	329	* probed, although the mtd code gets it right in
	330	* practice most of the time. We should use the
	331	* vendor and device ids specified by the binding to
	332	* bypass the heuristic probe code, but the mtd layer
	333	* provides, at present, no interface for doing so
	334	* :(. */
	335	.compatible = "jedec-flash",
	336	.data = (void *)"jedec_probe",
	337	},
fc28c39f WS	338	{
	339	.compatible = "mtd-ram",
	340	.data = (void *)"map_ram",
	341	},
a2c2fe4b VW	342	{
	343	.type = "rom",
	344	.compatible = "direct-mapped"
	345	},
	346	{ },
	347	};
c4d5e375	348	MODULE_DEVICE_TABLE(of, of_flash_match);
a2c2fe4b	349
1c48a5c9	350	static struct platform_driver of_flash_driver = {
4018294b GL	351	.driver = {
	352	.name = "of-flash",
	353	.owner = THIS_MODULE,
	354	.of_match_table = of_flash_match,
	355	},
c4d5e375 DG	356	.probe = of_flash_probe,
c4d5e375 DG	357	.remove = of_flash_remove,
a2c2fe4b VW	358	};
a2c2fe4b VW	359
f99640de	360	module_platform_driver(of_flash_driver);
a2c2fe4b VW	361
	362	MODULE_LICENSE("GPL");
	363	MODULE_AUTHOR("Vitaly Wool <vwool@ru.mvista.com>");
c4d5e375	364	MODULE_DESCRIPTION("Device tree based MTD map driver");