[mirror_ubuntu-eoan-kernel.git] / arch / powerpc / kernel / ibmebus.c

/*
 * IBM PowerPC IBM eBus Infrastructure Support.
 *
 * Copyright (c) 2005 IBM Corporation
 *  Joachim Fenkes <fenkes@de.ibm.com>
 *  Heiko J Schick <schickhj@de.ibm.com>
 *
 * All rights reserved.
 *
 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
 * BSD.
 *
 * OpenIB BSD License
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials
 * provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/init.h>
#include <linux/console.h>
#include <linux/kobject.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <asm/ibmebus.h>
#include <asm/abs_addr.h>

static struct device ibmebus_bus_device = { /* fake "parent" device */
	.bus_id = "ibmebus",
};

struct bus_type ibmebus_bus_type;

/* These devices will automatically be added to the bus during init */
static struct of_device_id __initdata ibmebus_matches[] = {
	{ .compatible = "IBM,lhca" },
	{ .compatible = "IBM,lhea" },
	{},
};

static void *ibmebus_alloc_coherent(struct device *dev,
				    size_t size,
				    dma_addr_t *dma_handle,
				    gfp_t flag)
{
	void *mem;

	mem = kmalloc(size, flag);
	*dma_handle = (dma_addr_t)mem;

	return mem;
}

static void ibmebus_free_coherent(struct device *dev,
				  size_t size, void *vaddr,
				  dma_addr_t dma_handle)
{
	kfree(vaddr);
}

static dma_addr_t ibmebus_map_page(struct device *dev,
				   struct page *page,
				   unsigned long offset,
				   size_t size,
				   enum dma_data_direction direction,
				   struct dma_attrs *attrs)
{
	return (dma_addr_t)(page_address(page) + offset);
}

static void ibmebus_unmap_page(struct device *dev,
			       dma_addr_t dma_addr,
			       size_t size,
			       enum dma_data_direction direction,
			       struct dma_attrs *attrs)
{
	return;
}

static int ibmebus_map_sg(struct device *dev,
			  struct scatterlist *sgl,
			  int nents, enum dma_data_direction direction,
			  struct dma_attrs *attrs)
{
	struct scatterlist *sg;
	int i;

	for_each_sg(sgl, sg, nents, i) {
		sg->dma_address = (dma_addr_t) sg_virt(sg);
		sg->dma_length = sg->length;
	}

	return nents;
}

static void ibmebus_unmap_sg(struct device *dev,
			     struct scatterlist *sg,
			     int nents, enum dma_data_direction direction,
			     struct dma_attrs *attrs)
{
	return;
}

static int ibmebus_dma_supported(struct device *dev, u64 mask)
{
	return 1;
}

static struct dma_mapping_ops ibmebus_dma_ops = {
	.alloc_coherent = ibmebus_alloc_coherent,
	.free_coherent  = ibmebus_free_coherent,
	.map_sg         = ibmebus_map_sg,
	.unmap_sg       = ibmebus_unmap_sg,
	.dma_supported  = ibmebus_dma_supported,
	.map_page       = ibmebus_map_page,
	.unmap_page     = ibmebus_unmap_page,
};

static int ibmebus_match_path(struct device *dev, void *data)
{
	struct device_node *dn = to_of_device(dev)->node;
	return (dn->full_name &&
		(strcasecmp((char *)data, dn->full_name) == 0));
}

static int ibmebus_match_node(struct device *dev, void *data)
{
	return to_of_device(dev)->node == data;
}

static int ibmebus_create_device(struct device_node *dn)
{
	struct of_device *dev;
	int ret;

	dev = of_device_alloc(dn, NULL, &ibmebus_bus_device);
	if (!dev)
		return -ENOMEM;

	dev->dev.bus = &ibmebus_bus_type;
	dev->dev.archdata.dma_ops = &ibmebus_dma_ops;

	ret = of_device_register(dev);
	if (ret) {
		of_device_free(dev);
		return ret;
	}

	return 0;
}

static int ibmebus_create_devices(const struct of_device_id *matches)
{
	struct device_node *root, *child;
	int ret = 0;

	root = of_find_node_by_path("/");

	for_each_child_of_node(root, child) {
		if (!of_match_node(matches, child))
			continue;

		if (bus_find_device(&ibmebus_bus_type, NULL, child,
				    ibmebus_match_node))
			continue;

		ret = ibmebus_create_device(child);
		if (ret) {
			printk(KERN_ERR "%s: failed to create device (%i)",
			       __func__, ret);
			of_node_put(child);
			break;
		}
	}

	of_node_put(root);
	return ret;
}

int ibmebus_register_driver(struct of_platform_driver *drv)
{
	/* If the driver uses devices that ibmebus doesn't know, add them */
	ibmebus_create_devices(drv->match_table);

	return of_register_driver(drv, &ibmebus_bus_type);
}
EXPORT_SYMBOL(ibmebus_register_driver);

void ibmebus_unregister_driver(struct of_platform_driver *drv)
{
	of_unregister_driver(drv);
}
EXPORT_SYMBOL(ibmebus_unregister_driver);

int ibmebus_request_irq(u32 ist, irq_handler_t handler,
			unsigned long irq_flags, const char *devname,
			void *dev_id)
{
	unsigned int irq = irq_create_mapping(NULL, ist);

	if (irq == NO_IRQ)
		return -EINVAL;

	return request_irq(irq, handler, irq_flags, devname, dev_id);
}
EXPORT_SYMBOL(ibmebus_request_irq);

void ibmebus_free_irq(u32 ist, void *dev_id)
{
	unsigned int irq = irq_find_mapping(NULL, ist);

	free_irq(irq, dev_id);
}
EXPORT_SYMBOL(ibmebus_free_irq);

static char *ibmebus_chomp(const char *in, size_t count)
{
	char *out = kmalloc(count + 1, GFP_KERNEL);

	if (!out)
		return NULL;

	memcpy(out, in, count);
	out[count] = '\0';
	if (out[count - 1] == '\n')
		out[count - 1] = '\0';

	return out;
}

static ssize_t ibmebus_store_probe(struct bus_type *bus,
				   const char *buf, size_t count)
{
	struct device_node *dn = NULL;
	char *path;
	ssize_t rc = 0;

	path = ibmebus_chomp(buf, count);
	if (!path)
		return -ENOMEM;

	if (bus_find_device(&ibmebus_bus_type, NULL, path,
			    ibmebus_match_path)) {
		printk(KERN_WARNING "%s: %s has already been probed\n",
		       __func__, path);
		rc = -EEXIST;
		goto out;
	}

	if ((dn = of_find_node_by_path(path))) {
		rc = ibmebus_create_device(dn);
		of_node_put(dn);
	} else {
		printk(KERN_WARNING "%s: no such device node: %s\n",
		       __func__, path);
		rc = -ENODEV;
	}

out:
	kfree(path);
	if (rc)
		return rc;
	return count;
}

static ssize_t ibmebus_store_remove(struct bus_type *bus,
				    const char *buf, size_t count)
{
	struct device *dev;
	char *path;

	path = ibmebus_chomp(buf, count);
	if (!path)
		return -ENOMEM;

	if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path,
				   ibmebus_match_path))) {
		of_device_unregister(to_of_device(dev));

		kfree(path);
		return count;
	} else {
		printk(KERN_WARNING "%s: %s not on the bus\n",
		       __func__, path);

		kfree(path);
		return -ENODEV;
	}
}

static struct bus_attribute ibmebus_bus_attrs[] = {
	__ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe),
	__ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove),
	__ATTR_NULL
};

struct bus_type ibmebus_bus_type = {
	.uevent    = of_device_uevent,
	.bus_attrs = ibmebus_bus_attrs
};
EXPORT_SYMBOL(ibmebus_bus_type);

static int __init ibmebus_bus_init(void)
{
	int err;

	printk(KERN_INFO "IBM eBus Device Driver\n");

	err = of_bus_type_init(&ibmebus_bus_type, "ibmebus");
	if (err) {
		printk(KERN_ERR "%s: failed to register IBM eBus.\n",
		       __func__);
		return err;
	}

	err = device_register(&ibmebus_bus_device);
	if (err) {
		printk(KERN_WARNING "%s: device_register returned %i\n",
		       __func__, err);
		bus_unregister(&ibmebus_bus_type);

		return err;
	}

	err = ibmebus_create_devices(ibmebus_matches);
	if (err) {
		device_unregister(&ibmebus_bus_device);
		bus_unregister(&ibmebus_bus_type);
		return err;
	}

	return 0;
}
postcore_initcall(ibmebus_bus_init);
Commit	Line	Data
d7a30103 HS	1	/*
	2	* IBM PowerPC IBM eBus Infrastructure Support.
	3	*
	4	* Copyright (c) 2005 IBM Corporation
6bccf755	5	* Joachim Fenkes <fenkes@de.ibm.com>
d7a30103	6	* Heiko J Schick <schickhj@de.ibm.com>
a8308800	7	*
d7a30103 HS	8	* All rights reserved.
d7a30103 HS	9	*
a8308800 JF	10	* This source code is distributed under a dual license of GPL v2.0 and OpenIB
a8308800 JF	11	* BSD.
d7a30103 HS	12	*
	13	* OpenIB BSD License
	14	*
a8308800 JF	15	* Redistribution and use in source and binary forms, with or without
a8308800 JF	16	* modification, are permitted provided that the following conditions are met:
d7a30103	17	*
a8308800 JF	18	* Redistributions of source code must retain the above copyright notice, this
a8308800 JF	19	* list of conditions and the following disclaimer.
d7a30103	20	*
a8308800 JF	21	* Redistributions in binary form must reproduce the above copyright notice,
a8308800 JF	22	* this list of conditions and the following disclaimer in the documentation
d7a30103	23	* and/or other materials
a8308800	24	* provided with the distribution.
d7a30103	25	*
a8308800 JF	26	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	27	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	30	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	31	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
d7a30103 HS	32	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
d7a30103 HS	33	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
a8308800 JF	34	* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
a8308800 JF	35	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
d7a30103 HS	36	* POSSIBILITY OF SUCH DAMAGE.
	37	*/
	38
	39	#include <linux/init.h>
	40	#include <linux/console.h>
	41	#include <linux/kobject.h>
	42	#include <linux/dma-mapping.h>
	43	#include <linux/interrupt.h>
283029d1	44	#include <linux/of.h>
a988c0a6	45	#include <linux/of_platform.h>
d7a30103 HS	46	#include <asm/ibmebus.h>
	47	#include <asm/abs_addr.h>
	48
6bccf755 JF	49	static struct device ibmebus_bus_device = { /* fake "parent" device */
6bccf755 JF	50	.bus_id = "ibmebus",
d7a30103 HS	51	};
d7a30103 HS	52
6bccf755 JF	53	struct bus_type ibmebus_bus_type;
6bccf755 JF	54
55347cc9	55	/* These devices will automatically be added to the bus during init */
1b17adf1	56	static struct of_device_id __initdata ibmebus_matches[] = {
55347cc9 JF	57	{ .compatible = "IBM,lhca" },
	58	{ .compatible = "IBM,lhea" },
	59	{},
	60	};
	61
d7a30103 HS	62	static void ibmebus_alloc_coherent(struct device dev,
	63	size_t size,
	64	dma_addr_t *dma_handle,
	65	gfp_t flag)
	66	{
	67	void *mem;
a8308800	68
d7a30103 HS	69	mem = kmalloc(size, flag);
	70	*dma_handle = (dma_addr_t)mem;
	71
	72	return mem;
	73	}
	74
	75	static void ibmebus_free_coherent(struct device *dev,
a8308800	76	size_t size, void *vaddr,
d7a30103 HS	77	dma_addr_t dma_handle)
	78	{
	79	kfree(vaddr);
	80	}
	81
f9226d57 MN	82	static dma_addr_t ibmebus_map_page(struct device *dev,
	83	struct page *page,
	84	unsigned long offset,
	85	size_t size,
	86	enum dma_data_direction direction,
	87	struct dma_attrs *attrs)
d7a30103	88	{
f9226d57	89	return (dma_addr_t)(page_address(page) + offset);
d7a30103 HS	90	}
d7a30103 HS	91
f9226d57 MN	92	static void ibmebus_unmap_page(struct device *dev,
	93	dma_addr_t dma_addr,
	94	size_t size,
	95	enum dma_data_direction direction,
	96	struct dma_attrs *attrs)
d7a30103 HS	97	{
	98	return;
	99	}
	100
	101	static int ibmebus_map_sg(struct device *dev,
78bdc310	102	struct scatterlist *sgl,
3affedc4 MN	103	int nents, enum dma_data_direction direction,
3affedc4 MN	104	struct dma_attrs *attrs)
d7a30103	105	{
78bdc310	106	struct scatterlist *sg;
d7a30103	107	int i;
a8308800	108
78bdc310	109	for_each_sg(sgl, sg, nents, i) {
58b053e4	110	sg->dma_address = (dma_addr_t) sg_virt(sg);
78bdc310	111	sg->dma_length = sg->length;
d7a30103	112	}
a8308800	113
d7a30103 HS	114	return nents;
	115	}
	116
	117	static void ibmebus_unmap_sg(struct device *dev,
	118	struct scatterlist *sg,
3affedc4 MN	119	int nents, enum dma_data_direction direction,
3affedc4 MN	120	struct dma_attrs *attrs)
d7a30103 HS	121	{
	122	return;
	123	}
	124
	125	static int ibmebus_dma_supported(struct device *dev, u64 mask)
	126	{
	127	return 1;
	128	}
	129
12d04eef	130	static struct dma_mapping_ops ibmebus_dma_ops = {
d7a30103 HS	131	.alloc_coherent = ibmebus_alloc_coherent,
d7a30103 HS	132	.free_coherent = ibmebus_free_coherent,
d7a30103 HS	133	.map_sg = ibmebus_map_sg,
	134	.unmap_sg = ibmebus_unmap_sg,
	135	.dma_supported = ibmebus_dma_supported,
f9226d57 MN	136	.map_page = ibmebus_map_page,
f9226d57 MN	137	.unmap_page = ibmebus_unmap_page,
d7a30103 HS	138	};
d7a30103 HS	139
55347cc9 JF	140	static int ibmebus_match_path(struct device dev, void data)
	141	{
	142	struct device_node *dn = to_of_device(dev)->node;
	143	return (dn->full_name &&
	144	(strcasecmp((char *)data, dn->full_name) == 0));
	145	}
	146
	147	static int ibmebus_match_node(struct device dev, void data)
	148	{
	149	return to_of_device(dev)->node == data;
	150	}
	151
	152	static int ibmebus_create_device(struct device_node *dn)
	153	{
	154	struct of_device *dev;
	155	int ret;
	156
	157	dev = of_device_alloc(dn, NULL, &ibmebus_bus_device);
	158	if (!dev)
	159	return -ENOMEM;
	160
	161	dev->dev.bus = &ibmebus_bus_type;
	162	dev->dev.archdata.dma_ops = &ibmebus_dma_ops;
	163
	164	ret = of_device_register(dev);
	165	if (ret) {
	166	of_device_free(dev);
	167	return ret;
	168	}
	169
	170	return 0;
	171	}
	172
	173	static int ibmebus_create_devices(const struct of_device_id *matches)
	174	{
	175	struct device_node root, child;
	176	int ret = 0;
	177
	178	root = of_find_node_by_path("/");
	179
85e99b9f	180	for_each_child_of_node(root, child) {
55347cc9 JF	181	if (!of_match_node(matches, child))
	182	continue;
	183
	184	if (bus_find_device(&ibmebus_bus_type, NULL, child,
	185	ibmebus_match_node))
	186	continue;
	187
	188	ret = ibmebus_create_device(child);
	189	if (ret) {
	190	printk(KERN_ERR "%s: failed to create device (%i)",
e48b1b45	191	__func__, ret);
55347cc9 JF	192	of_node_put(child);
	193	break;
	194	}
	195	}
	196
	197	of_node_put(root);
	198	return ret;
	199	}
	200
6b08f3ae	201	int ibmebus_register_driver(struct of_platform_driver *drv)
d7a30103	202	{
6b08f3ae JF	203	/* If the driver uses devices that ibmebus doesn't know, add them */
	204	ibmebus_create_devices(drv->match_table);
	205
745c2ef2	206	return of_register_driver(drv, &ibmebus_bus_type);
d7a30103 HS	207	}
	208	EXPORT_SYMBOL(ibmebus_register_driver);
	209
6b08f3ae	210	void ibmebus_unregister_driver(struct of_platform_driver *drv)
a8308800	211	{
745c2ef2	212	of_unregister_driver(drv);
d7a30103 HS	213	}
	214	EXPORT_SYMBOL(ibmebus_unregister_driver);
	215
6b08f3ae JF	216	int ibmebus_request_irq(u32 ist, irq_handler_t handler,
6b08f3ae JF	217	unsigned long irq_flags, const char *devname,
d7a30103 HS	218	void *dev_id)
d7a30103 HS	219	{
6e99e458	220	unsigned int irq = irq_create_mapping(NULL, ist);
a8308800	221
d7a30103 HS	222	if (irq == NO_IRQ)
d7a30103 HS	223	return -EINVAL;
a8308800	224
6b08f3ae	225	return request_irq(irq, handler, irq_flags, devname, dev_id);
d7a30103 HS	226	}
	227	EXPORT_SYMBOL(ibmebus_request_irq);
	228
6b08f3ae	229	void ibmebus_free_irq(u32 ist, void *dev_id)
d7a30103	230	{
0ebfff14	231	unsigned int irq = irq_find_mapping(NULL, ist);
a8308800	232
d7a30103	233	free_irq(irq, dev_id);
d7a30103 HS	234	}
	235	EXPORT_SYMBOL(ibmebus_free_irq);
	236
0727702a JF	237	static char ibmebus_chomp(const char in, size_t count)
0727702a JF	238	{
61a564fd JJ	239	char *out = kmalloc(count + 1, GFP_KERNEL);
61a564fd JJ	240
0727702a JF	241	if (!out)
	242	return NULL;
	243
	244	memcpy(out, in, count);
	245	out[count] = '\0';
	246	if (out[count - 1] == '\n')
	247	out[count - 1] = '\0';
	248
	249	return out;
6bccf755 JF	250	}
	251
	252	static ssize_t ibmebus_store_probe(struct bus_type *bus,
	253	const char *buf, size_t count)
	254	{
	255	struct device_node *dn = NULL;
0727702a	256	char *path;
55347cc9	257	ssize_t rc = 0;
0727702a JF	258
	259	path = ibmebus_chomp(buf, count);
	260	if (!path)
	261	return -ENOMEM;
	262
	263	if (bus_find_device(&ibmebus_bus_type, NULL, path,
74c9b99d	264	ibmebus_match_path)) {
0727702a	265	printk(KERN_WARNING "%s: %s has already been probed\n",
e48b1b45	266	__func__, path);
74c9b99d	267	rc = -EEXIST;
0727702a	268	goto out;
6bccf755 JF	269	}
6bccf755 JF	270
0727702a	271	if ((dn = of_find_node_by_path(path))) {
55347cc9	272	rc = ibmebus_create_device(dn);
0727702a	273	of_node_put(dn);
0727702a JF	274	} else {
0727702a JF	275	printk(KERN_WARNING "%s: no such device node: %s\n",
e48b1b45	276	__func__, path);
0727702a	277	rc = -ENODEV;
6bccf755 JF	278	}
6bccf755 JF	279
0727702a JF	280	out:
0727702a JF	281	kfree(path);
55347cc9 JF	282	if (rc)
	283	return rc;
	284	return count;
6bccf755 JF	285	}
	286
	287	static ssize_t ibmebus_store_remove(struct bus_type *bus,
	288	const char *buf, size_t count)
	289	{
	290	struct device *dev;
0727702a	291	char *path;
6bccf755	292
0727702a JF	293	path = ibmebus_chomp(buf, count);
	294	if (!path)
	295	return -ENOMEM;
	296
	297	if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path,
	298	ibmebus_match_path))) {
55347cc9	299	of_device_unregister(to_of_device(dev));
0727702a JF	300
	301	kfree(path);
	302	return count;
6bccf755	303	} else {
0727702a	304	printk(KERN_WARNING "%s: %s not on the bus\n",
e48b1b45	305	__func__, path);
0727702a JF	306
0727702a JF	307	kfree(path);
6bccf755 JF	308	return -ENODEV;
6bccf755 JF	309	}
6bccf755 JF	310	}
	311
	312	static struct bus_attribute ibmebus_bus_attrs[] = {
	313	__ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe),
	314	__ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove),
	315	__ATTR_NULL
	316	};
	317
d7a30103	318	struct bus_type ibmebus_bus_type = {
55347cc9	319	.uevent = of_device_uevent,
6bccf755	320	.bus_attrs = ibmebus_bus_attrs
d7a30103 HS	321	};
	322	EXPORT_SYMBOL(ibmebus_bus_type);
	323
	324	static int __init ibmebus_bus_init(void)
	325	{
	326	int err;
a8308800	327
d7a30103	328	printk(KERN_INFO "IBM eBus Device Driver\n");
a8308800	329
a988c0a6	330	err = of_bus_type_init(&ibmebus_bus_type, "ibmebus");
d7a30103	331	if (err) {
a988c0a6	332	printk(KERN_ERR "%s: failed to register IBM eBus.\n",
e48b1b45	333	__func__);
d7a30103 HS	334	return err;
d7a30103 HS	335	}
a8308800	336
6bccf755	337	err = device_register(&ibmebus_bus_device);
d7a30103	338	if (err) {
a8308800	339	printk(KERN_WARNING "%s: device_register returned %i\n",
e48b1b45	340	__func__, err);
d7a30103 HS	341	bus_unregister(&ibmebus_bus_type);
	342
	343	return err;
	344	}
a8308800	345
1b17adf1	346	err = ibmebus_create_devices(ibmebus_matches);
55347cc9 JF	347	if (err) {
	348	device_unregister(&ibmebus_bus_device);
	349	bus_unregister(&ibmebus_bus_type);
	350	return err;
	351	}
	352
d7a30103 HS	353	return 0;
d7a30103 HS	354	}
a988c0a6	355	postcore_initcall(ibmebus_bus_init);