[mirror_ubuntu-bionic-kernel.git] / drivers / input / misc / sparcspkr.c

/*
 *  Driver for PC-speaker like devices found on various Sparc systems.
 *
 *  Copyright (c) 2002 Vojtech Pavlik
 *  Copyright (c) 2002, 2006, 2008 David S. Miller (davem@davemloft.net)
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/of_device.h>

#include <asm/io.h>

MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_DESCRIPTION("Sparc Speaker beeper driver");
MODULE_LICENSE("GPL");

struct grover_beep_info {
	void __iomem	*freq_regs;
	void __iomem	*enable_reg;
};

struct bbc_beep_info {
	u32		clock_freq;
	void __iomem	*regs;
};

struct sparcspkr_state {
	const char		*name;
	int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
	spinlock_t		lock;
	struct input_dev	*input_dev;
	union {
		struct grover_beep_info grover;
		struct bbc_beep_info bbc;
	} u;
};

static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
{
	u32 val, clock_freq = info->clock_freq;
	int i;

	if (!count)
		return 0;

	if (count <= clock_freq >> 20)
		return 1 << 18;

	if (count >= clock_freq >> 12)
		return 1 << 10;

	val = 1 << 18;
	for (i = 19; i >= 11; i--) {
		val >>= 1;
		if (count <= clock_freq >> i)
			break;
	}

	return val;
}

static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
	struct bbc_beep_info *info = &state->u.bbc;
	unsigned int count = 0;
	unsigned long flags;

	if (type != EV_SND)
		return -1;

	switch (code) {
		case SND_BELL: if (value) value = 1000;
		case SND_TONE: break;
		default: return -1;
	}

	if (value > 20 && value < 32767)
		count = 1193182 / value;

	count = bbc_count_to_reg(info, count);

	spin_lock_irqsave(&state->lock, flags);

	if (count) {
		outb(0x01,                 info->regs + 0);
		outb(0x00,                 info->regs + 2);
		outb((count >> 16) & 0xff, info->regs + 3);
		outb((count >>  8) & 0xff, info->regs + 4);
		outb(0x00,                 info->regs + 5);
	} else {
		outb(0x00,                 info->regs + 0);
	}

	spin_unlock_irqrestore(&state->lock, flags);

	return 0;
}

static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
	struct grover_beep_info *info = &state->u.grover;
	unsigned int count = 0;
	unsigned long flags;

	if (type != EV_SND)
		return -1;

	switch (code) {
		case SND_BELL: if (value) value = 1000;
		case SND_TONE: break;
		default: return -1;
	}

	if (value > 20 && value < 32767)
		count = 1193182 / value;

	spin_lock_irqsave(&state->lock, flags);

	if (count) {
		/* enable counter 2 */
		outb(inb(info->enable_reg) | 3, info->enable_reg);
		/* set command for counter 2, 2 byte write */
		outb(0xB6, info->freq_regs + 1);
		/* select desired HZ */
		outb(count & 0xff, info->freq_regs + 0);
		outb((count >> 8) & 0xff, info->freq_regs + 0);
	} else {
		/* disable counter 2 */
		outb(inb_p(info->enable_reg) & 0xFC, info->enable_reg);
	}

	spin_unlock_irqrestore(&state->lock, flags);

	return 0;
}

static int __devinit sparcspkr_probe(struct device *dev)
{
	struct sparcspkr_state *state = dev_get_drvdata(dev);
	struct input_dev *input_dev;
	int error;

	input_dev = input_allocate_device();
	if (!input_dev)
		return -ENOMEM;

	input_dev->name = state->name;
	input_dev->phys = "sparc/input0";
	input_dev->id.bustype = BUS_ISA;
	input_dev->id.vendor = 0x001f;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->dev.parent = dev;

	input_dev->evbit[0] = BIT_MASK(EV_SND);
	input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);

	input_dev->event = state->event;

	error = input_register_device(input_dev);
	if (error) {
		input_free_device(input_dev);
		return error;
	}

	state->input_dev = input_dev;

	return 0;
}

static int sparcspkr_shutdown(struct of_device *dev)
{
	struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
	struct input_dev *input_dev = state->input_dev;

	/* turn off the speaker */
	state->event(input_dev, EV_SND, SND_BELL, 0);

	return 0;
}

static int __devinit bbc_beep_probe(struct of_device *op, const struct of_device_id *match)
{
	struct sparcspkr_state *state;
	struct bbc_beep_info *info;
	struct device_node *dp;
	int err = -ENOMEM;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		goto out_err;

	state->name = "Sparc BBC Speaker";
	state->event = bbc_spkr_event;
	spin_lock_init(&state->lock);

	dp = of_find_node_by_path("/");
	err = -ENODEV;
	if (!dp)
		goto out_free;

	info = &state->u.bbc;
	info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
	if (!info->clock_freq)
		goto out_free;

	info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
	if (!info->regs)
		goto out_free;

	dev_set_drvdata(&op->dev, state);

	err = sparcspkr_probe(&op->dev);
	if (err)
		goto out_clear_drvdata;

	return 0;

out_clear_drvdata:
	dev_set_drvdata(&op->dev, NULL);
	of_iounmap(&op->resource[0], info->regs, 6);

out_free:
	kfree(state);
out_err:
	return err;
}

static int bbc_remove(struct of_device *op)
{
	struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
	struct input_dev *input_dev = state->input_dev;
	struct bbc_beep_info *info = &state->u.bbc;

	/* turn off the speaker */
	state->event(input_dev, EV_SND, SND_BELL, 0);

	input_unregister_device(input_dev);

	of_iounmap(&op->resource[0], info->regs, 6);

	dev_set_drvdata(&op->dev, NULL);
	kfree(state);

	return 0;
}

static const struct of_device_id bbc_beep_match[] = {
	{
		.name = "beep",
		.compatible = "SUNW,bbc-beep",
	},
	{},
};

static struct of_platform_driver bbc_beep_driver = {
	.name		= "bbcbeep",
	.match_table	= bbc_beep_match,
	.probe		= bbc_beep_probe,
	.remove		= __devexit_p(bbc_remove),
	.shutdown	= sparcspkr_shutdown,
};

static int __devinit grover_beep_probe(struct of_device *op, const struct of_device_id *match)
{
	struct sparcspkr_state *state;
	struct grover_beep_info *info;
	int err = -ENOMEM;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		goto out_err;

	state->name = "Sparc Grover Speaker";
	state->event = grover_spkr_event;
	spin_lock_init(&state->lock);

	info = &state->u.grover;
	info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
	if (!info->freq_regs)
		goto out_free;

	info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable");
	if (!info->enable_reg)
		goto out_unmap_freq_regs;

	dev_set_drvdata(&op->dev, state);

	err = sparcspkr_probe(&op->dev);
	if (err)
		goto out_clear_drvdata;

	return 0;

out_clear_drvdata:
	dev_set_drvdata(&op->dev, NULL);
	of_iounmap(&op->resource[3], info->enable_reg, 1);

out_unmap_freq_regs:
	of_iounmap(&op->resource[2], info->freq_regs, 2);
out_free:
	kfree(state);
out_err:
	return err;
}

static int grover_remove(struct of_device *op)
{
	struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
	struct grover_beep_info *info = &state->u.grover;
	struct input_dev *input_dev = state->input_dev;

	/* turn off the speaker */
	state->event(input_dev, EV_SND, SND_BELL, 0);

	input_unregister_device(input_dev);

	of_iounmap(&op->resource[3], info->enable_reg, 1);
	of_iounmap(&op->resource[2], info->freq_regs, 2);

	dev_set_drvdata(&op->dev, NULL);
	kfree(state);

	return 0;
}

static const struct of_device_id grover_beep_match[] = {
	{
		.name = "beep",
		.compatible = "SUNW,smbus-beep",
	},
	{},
};

static struct of_platform_driver grover_beep_driver = {
	.name		= "groverbeep",
	.match_table	= grover_beep_match,
	.probe		= grover_beep_probe,
	.remove		= __devexit_p(grover_remove),
	.shutdown	= sparcspkr_shutdown,
};

static int __init sparcspkr_init(void)
{
	int err = of_register_driver(&bbc_beep_driver,
				     &of_platform_bus_type);

	if (!err) {
		err = of_register_driver(&grover_beep_driver,
					 &of_platform_bus_type);
		if (err)
			of_unregister_driver(&bbc_beep_driver);
	}

	return err;
}

static void __exit sparcspkr_exit(void)
{
	of_unregister_driver(&bbc_beep_driver);
	of_unregister_driver(&grover_beep_driver);
}

module_init(sparcspkr_init);
module_exit(sparcspkr_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Driver for PC-speaker like devices found on various Sparc systems.
	3	*
	4	* Copyright (c) 2002 Vojtech Pavlik
9c1a5077	5	* Copyright (c) 2002, 2006, 2008 David S. Miller (davem@davemloft.net)
1da177e4	6	*/
1da177e4 LT	7	#include <linux/kernel.h>
	8	#include <linux/module.h>
	9	#include <linux/init.h>
	10	#include <linux/input.h>
9c1a5077	11	#include <linux/of_device.h>
1da177e4 LT	12
1da177e4 LT	13	#include <asm/io.h>
1da177e4	14
a2bd4fd1	15	MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
76b7cddf	16	MODULE_DESCRIPTION("Sparc Speaker beeper driver");
1da177e4 LT	17	MODULE_LICENSE("GPL");
1da177e4 LT	18
9c1a5077 DM	19	struct grover_beep_info {
	20	void __iomem *freq_regs;
	21	void __iomem *enable_reg;
	22	};
	23
	24	struct bbc_beep_info {
	25	u32 clock_freq;
	26	void __iomem *regs;
	27	};
	28
a2bd4fd1 DM	29	struct sparcspkr_state {
a2bd4fd1 DM	30	const char *name;
a2bd4fd1 DM	31	int (event)(struct input_dev dev, unsigned int type, unsigned int code, int value);
	32	spinlock_t lock;
	33	struct input_dev *input_dev;
9c1a5077 DM	34	union {
	35	struct grover_beep_info grover;
	36	struct bbc_beep_info bbc;
	37	} u;
a2bd4fd1	38	};
1da177e4	39
9c1a5077 DM	40	static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
	41	{
	42	u32 val, clock_freq = info->clock_freq;
	43	int i;
	44
	45	if (!count)
	46	return 0;
	47
	48	if (count <= clock_freq >> 20)
	49	return 1 << 18;
	50
	51	if (count >= clock_freq >> 12)
	52	return 1 << 10;
	53
	54	val = 1 << 18;
	55	for (i = 19; i >= 11; i--) {
	56	val >>= 1;
	57	if (count <= clock_freq >> i)
	58	break;
	59	}
	60
	61	return val;
	62	}
	63
	64	static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
1da177e4	65	{
293e6392	66	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
9c1a5077	67	struct bbc_beep_info *info = &state->u.bbc;
1da177e4 LT	68	unsigned int count = 0;
	69	unsigned long flags;
	70
	71	if (type != EV_SND)
	72	return -1;
	73
	74	switch (code) {
	75	case SND_BELL: if (value) value = 1000;
	76	case SND_TONE: break;
	77	default: return -1;
	78	}
	79
	80	if (value > 20 && value < 32767)
	81	count = 1193182 / value;
	82
9c1a5077 DM	83	count = bbc_count_to_reg(info, count);
9c1a5077 DM	84
a2bd4fd1	85	spin_lock_irqsave(&state->lock, flags);
1da177e4	86
9c1a5077 DM	87	if (count) {
	88	outb(0x01, info->regs + 0);
	89	outb(0x00, info->regs + 2);
	90	outb((count >> 16) & 0xff, info->regs + 3);
	91	outb((count >> 8) & 0xff, info->regs + 4);
	92	outb(0x00, info->regs + 5);
	93	} else {
	94	outb(0x00, info->regs + 0);
	95	}
1da177e4	96
a2bd4fd1	97	spin_unlock_irqrestore(&state->lock, flags);
1da177e4 LT	98
	99	return 0;
	100	}
	101
9c1a5077	102	static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
1da177e4	103	{
293e6392	104	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
9c1a5077	105	struct grover_beep_info *info = &state->u.grover;
1da177e4 LT	106	unsigned int count = 0;
	107	unsigned long flags;
	108
	109	if (type != EV_SND)
	110	return -1;
	111
	112	switch (code) {
	113	case SND_BELL: if (value) value = 1000;
	114	case SND_TONE: break;
	115	default: return -1;
	116	}
	117
	118	if (value > 20 && value < 32767)
	119	count = 1193182 / value;
	120
a2bd4fd1	121	spin_lock_irqsave(&state->lock, flags);
1da177e4 LT	122
	123	if (count) {
	124	/* enable counter 2 */
9c1a5077	125	outb(inb(info->enable_reg) \| 3, info->enable_reg);
1da177e4	126	/* set command for counter 2, 2 byte write */
9c1a5077	127	outb(0xB6, info->freq_regs + 1);
1da177e4	128	/* select desired HZ */
9c1a5077 DM	129	outb(count & 0xff, info->freq_regs + 0);
9c1a5077 DM	130	outb((count >> 8) & 0xff, info->freq_regs + 0);
1da177e4 LT	131	} else {
1da177e4 LT	132	/* disable counter 2 */
9c1a5077	133	outb(inb_p(info->enable_reg) & 0xFC, info->enable_reg);
1da177e4 LT	134	}
1da177e4 LT	135
a2bd4fd1	136	spin_unlock_irqrestore(&state->lock, flags);
1da177e4 LT	137
	138	return 0;
	139	}
	140
a2bd4fd1	141	static int __devinit sparcspkr_probe(struct device *dev)
1da177e4	142	{
a2bd4fd1	143	struct sparcspkr_state *state = dev_get_drvdata(dev);
f5b64078 DT	144	struct input_dev *input_dev;
f5b64078 DT	145	int error;
1da177e4	146
f5b64078 DT	147	input_dev = input_allocate_device();
f5b64078 DT	148	if (!input_dev)
76b7cddf DT	149	return -ENOMEM;
76b7cddf DT	150
a2bd4fd1	151	input_dev->name = state->name;
f5b64078 DT	152	input_dev->phys = "sparc/input0";
	153	input_dev->id.bustype = BUS_ISA;
	154	input_dev->id.vendor = 0x001f;
	155	input_dev->id.product = 0x0001;
	156	input_dev->id.version = 0x0100;
293e6392	157	input_dev->dev.parent = dev;
1da177e4	158
7b19ada2 JS	159	input_dev->evbit[0] = BIT_MASK(EV_SND);
7b19ada2 JS	160	input_dev->sndbit[0] = BIT_MASK(SND_BELL) \| BIT_MASK(SND_TONE);
1da177e4	161
a2bd4fd1	162	input_dev->event = state->event;
f5b64078 DT	163
	164	error = input_register_device(input_dev);
	165	if (error) {
	166	input_free_device(input_dev);
	167	return error;
	168	}
	169
a2bd4fd1	170	state->input_dev = input_dev;
1da177e4	171
1da177e4 LT	172	return 0;
1da177e4 LT	173	}
f5b64078	174
9c1a5077	175	static int sparcspkr_shutdown(struct of_device *dev)
f5b64078	176	{
a2bd4fd1 DM	177	struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
a2bd4fd1 DM	178	struct input_dev *input_dev = state->input_dev;
f5b64078	179
f5b64078	180	/* turn off the speaker */
a2bd4fd1 DM	181	state->event(input_dev, EV_SND, SND_BELL, 0);
a2bd4fd1 DM	182
f5b64078 DT	183	return 0;
	184	}
	185
9c1a5077	186	static int __devinit bbc_beep_probe(struct of_device op, const struct of_device_id match)
f5b64078	187	{
9c1a5077 DM	188	struct sparcspkr_state *state;
	189	struct bbc_beep_info *info;
	190	struct device_node *dp;
	191	int err = -ENOMEM;
a2bd4fd1	192
9c1a5077 DM	193	state = kzalloc(sizeof(*state), GFP_KERNEL);
	194	if (!state)
	195	goto out_err;
	196
	197	state->name = "Sparc BBC Speaker";
	198	state->event = bbc_spkr_event;
	199	spin_lock_init(&state->lock);
	200
	201	dp = of_find_node_by_path("/");
	202	err = -ENODEV;
	203	if (!dp)
	204	goto out_free;
	205
	206	info = &state->u.bbc;
	207	info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
	208	if (!info->clock_freq)
	209	goto out_free;
	210
	211	info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
	212	if (!info->regs)
	213	goto out_free;
	214
	215	dev_set_drvdata(&op->dev, state);
	216
	217	err = sparcspkr_probe(&op->dev);
	218	if (err)
	219	goto out_clear_drvdata;
a2bd4fd1 DM	220
a2bd4fd1 DM	221	return 0;
9c1a5077 DM	222
	223	out_clear_drvdata:
	224	dev_set_drvdata(&op->dev, NULL);
	225	of_iounmap(&op->resource[0], info->regs, 6);
	226
	227	out_free:
	228	kfree(state);
	229	out_err:
	230	return err;
a2bd4fd1 DM	231	}
a2bd4fd1 DM	232
9c1a5077	233	static int bbc_remove(struct of_device *op)
a2bd4fd1	234	{
9c1a5077 DM	235	struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
	236	struct input_dev *input_dev = state->input_dev;
	237	struct bbc_beep_info *info = &state->u.bbc;
a2bd4fd1	238
9c1a5077 DM	239	/* turn off the speaker */
9c1a5077 DM	240	state->event(input_dev, EV_SND, SND_BELL, 0);
a2bd4fd1	241
9c1a5077	242	input_unregister_device(input_dev);
a2bd4fd1	243
9c1a5077	244	of_iounmap(&op->resource[0], info->regs, 6);
a2bd4fd1	245
9c1a5077 DM	246	dev_set_drvdata(&op->dev, NULL);
9c1a5077 DM	247	kfree(state);
a2bd4fd1 DM	248
a2bd4fd1 DM	249	return 0;
f5b64078 DT	250	}
f5b64078 DT	251
fd098316	252	static const struct of_device_id bbc_beep_match[] = {
a2bd4fd1 DM	253	{
a2bd4fd1 DM	254	.name = "beep",
9c1a5077	255	.compatible = "SUNW,bbc-beep",
f5b64078	256	},
a2bd4fd1	257	{},
f5b64078 DT	258	};
f5b64078 DT	259
9c1a5077 DM	260	static struct of_platform_driver bbc_beep_driver = {
	261	.name = "bbcbeep",
	262	.match_table = bbc_beep_match,
	263	.probe = bbc_beep_probe,
	264	.remove = __devexit_p(bbc_remove),
a2bd4fd1 DM	265	.shutdown = sparcspkr_shutdown,
a2bd4fd1 DM	266	};
f5b64078	267
9c1a5077	268	static int __devinit grover_beep_probe(struct of_device op, const struct of_device_id match)
f5b64078	269	{
a2bd4fd1	270	struct sparcspkr_state *state;
9c1a5077 DM	271	struct grover_beep_info *info;
9c1a5077 DM	272	int err = -ENOMEM;
f5b64078	273
a2bd4fd1 DM	274	state = kzalloc(sizeof(*state), GFP_KERNEL);
a2bd4fd1 DM	275	if (!state)
9c1a5077	276	goto out_err;
f5b64078	277
9c1a5077 DM	278	state->name = "Sparc Grover Speaker";
9c1a5077 DM	279	state->event = grover_spkr_event;
a2bd4fd1 DM	280	spin_lock_init(&state->lock);
a2bd4fd1 DM	281
9c1a5077 DM	282	info = &state->u.grover;
	283	info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
	284	if (!info->freq_regs)
	285	goto out_free;
f5b64078	286
9c1a5077 DM	287	info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable");
	288	if (!info->enable_reg)
	289	goto out_unmap_freq_regs;
	290
	291	dev_set_drvdata(&op->dev, state);
	292
	293	err = sparcspkr_probe(&op->dev);
	294	if (err)
	295	goto out_clear_drvdata;
	296
	297	return 0;
	298
	299	out_clear_drvdata:
	300	dev_set_drvdata(&op->dev, NULL);
	301	of_iounmap(&op->resource[3], info->enable_reg, 1);
	302
	303	out_unmap_freq_regs:
	304	of_iounmap(&op->resource[2], info->freq_regs, 2);
	305	out_free:
	306	kfree(state);
	307	out_err:
	308	return err;
	309	}
	310
	311	static int grover_remove(struct of_device *op)
	312	{
	313	struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
	314	struct grover_beep_info *info = &state->u.grover;
	315	struct input_dev *input_dev = state->input_dev;
	316
	317	/* turn off the speaker */
	318	state->event(input_dev, EV_SND, SND_BELL, 0);
	319
	320	input_unregister_device(input_dev);
	321
	322	of_iounmap(&op->resource[3], info->enable_reg, 1);
	323	of_iounmap(&op->resource[2], info->freq_regs, 2);
	324
	325	dev_set_drvdata(&op->dev, NULL);
	326	kfree(state);
f5b64078 DT	327
f5b64078 DT	328	return 0;
a2bd4fd1	329	}
f5b64078	330
fd098316	331	static const struct of_device_id grover_beep_match[] = {
a2bd4fd1	332	{
9c1a5077 DM	333	.name = "beep",
9c1a5077 DM	334	.compatible = "SUNW,smbus-beep",
a2bd4fd1 DM	335	},
	336	{},
	337	};
f5b64078	338
9c1a5077 DM	339	static struct of_platform_driver grover_beep_driver = {
	340	.name = "groverbeep",
	341	.match_table = grover_beep_match,
	342	.probe = grover_beep_probe,
	343	.remove = __devexit_p(grover_remove),
a2bd4fd1 DM	344	.shutdown = sparcspkr_shutdown,
a2bd4fd1 DM	345	};
1da177e4 LT	346
	347	static int __init sparcspkr_init(void)
	348	{
9c1a5077 DM	349	int err = of_register_driver(&bbc_beep_driver,
9c1a5077 DM	350	&of_platform_bus_type);
a2bd4fd1 DM	351
a2bd4fd1 DM	352	if (!err) {
9c1a5077 DM	353	err = of_register_driver(&grover_beep_driver,
9c1a5077 DM	354	&of_platform_bus_type);
a2bd4fd1	355	if (err)
9c1a5077	356	of_unregister_driver(&bbc_beep_driver);
1da177e4	357	}
1da177e4	358
a2bd4fd1	359	return err;
1da177e4 LT	360	}
	361
	362	static void __exit sparcspkr_exit(void)
	363	{
9c1a5077 DM	364	of_unregister_driver(&bbc_beep_driver);
9c1a5077 DM	365	of_unregister_driver(&grover_beep_driver);
1da177e4 LT	366	}
	367
	368	module_init(sparcspkr_init);
	369	module_exit(sparcspkr_exit);