[linux-2.6-block.git] / drivers / macintosh / windfarm_smu_sat.c

/*
 * Windfarm PowerMac thermal control.  SMU "satellite" controller sensors.
 *
 * Copyright (C) 2005 Paul Mackerras, IBM Corp. <paulus@samba.org>
 *
 * Released under the terms of the GNU GPL v2.
 */

#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/wait.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <asm/prom.h>
#include <asm/smu.h>
#include <asm/pmac_low_i2c.h>

#include "windfarm.h"

#define VERSION "1.0"

/* If the cache is older than 800ms we'll refetch it */
#define MAX_AGE		msecs_to_jiffies(800)

struct wf_sat {
	struct kref		ref;
	int			nr;
	struct mutex		mutex;
	unsigned long		last_read; /* jiffies when cache last updated */
	u8			cache[16];
	struct list_head	sensors;
	struct i2c_client	*i2c;
	struct device_node	*node;
};

static struct wf_sat *sats[2];

struct wf_sat_sensor {
	struct list_head	link;
	int			index;
	int			index2;		/* used for power sensors */
	int			shift;
	struct wf_sat		*sat;
	struct wf_sensor 	sens;
};

#define wf_to_sat(c)	container_of(c, struct wf_sat_sensor, sens)

struct smu_sdbp_header *smu_sat_get_sdb_partition(unsigned int sat_id, int id,
						  unsigned int *size)
{
	struct wf_sat *sat;
	int err;
	unsigned int i, len;
	u8 *buf;
	u8 data[4];

	/* TODO: Add the resulting partition to the device-tree */

	if (sat_id > 1 || (sat = sats[sat_id]) == NULL)
		return NULL;

	err = i2c_smbus_write_word_data(sat->i2c, 8, id << 8);
	if (err) {
		printk(KERN_ERR "smu_sat_get_sdb_part wr error %d\n", err);
		return NULL;
	}

	err = i2c_smbus_read_word_data(sat->i2c, 9);
	if (err < 0) {
		printk(KERN_ERR "smu_sat_get_sdb_part rd len error\n");
		return NULL;
	}
	len = err;
	if (len == 0) {
		printk(KERN_ERR "smu_sat_get_sdb_part no partition %x\n", id);
		return NULL;
	}

	len = le16_to_cpu(len);
	len = (len + 3) & ~3;
	buf = kmalloc(len, GFP_KERNEL);
	if (buf == NULL)
		return NULL;

	for (i = 0; i < len; i += 4) {
		err = i2c_smbus_read_i2c_block_data(sat->i2c, 0xa, 4, data);
		if (err < 0) {
			printk(KERN_ERR "smu_sat_get_sdb_part rd err %d\n",
			       err);
			goto fail;
		}
		buf[i] = data[1];
		buf[i+1] = data[0];
		buf[i+2] = data[3];
		buf[i+3] = data[2];
	}

	printk(KERN_DEBUG "sat %d partition %x:", sat_id, id);
	print_hex_dump(KERN_DEBUG, "  ", DUMP_PREFIX_OFFSET,
		       16, 1, buf, len, false);
	if (size)
		*size = len;
	return (struct smu_sdbp_header *) buf;

 fail:
	kfree(buf);
	return NULL;
}
EXPORT_SYMBOL_GPL(smu_sat_get_sdb_partition);

/* refresh the cache */
static int wf_sat_read_cache(struct wf_sat *sat)
{
	int err;

	err = i2c_smbus_read_i2c_block_data(sat->i2c, 0x3f, 16, sat->cache);
	if (err < 0)
		return err;
	sat->last_read = jiffies;

#ifdef LOTSA_DEBUG
	{
		int i;
		printk(KERN_DEBUG "wf_sat_get: data is");
		print_hex_dump(KERN_DEBUG, "  ", DUMP_PREFIX_OFFSET,
			       16, 1, sat->cache, 16, false);
	}
#endif
	return 0;
}

static int wf_sat_sensor_get(struct wf_sensor *sr, s32 *value)
{
	struct wf_sat_sensor *sens = wf_to_sat(sr);
	struct wf_sat *sat = sens->sat;
	int i, err;
	s32 val;

	if (sat->i2c == NULL)
		return -ENODEV;

	mutex_lock(&sat->mutex);
	if (time_after(jiffies, (sat->last_read + MAX_AGE))) {
		err = wf_sat_read_cache(sat);
		if (err)
			goto fail;
	}

	i = sens->index * 2;
	val = ((sat->cache[i] << 8) + sat->cache[i+1]) << sens->shift;
	if (sens->index2 >= 0) {
		i = sens->index2 * 2;
		/* 4.12 * 8.8 -> 12.20; shift right 4 to get 16.16 */
		val = (val * ((sat->cache[i] << 8) + sat->cache[i+1])) >> 4;
	}

	*value = val;
	err = 0;

 fail:
	mutex_unlock(&sat->mutex);
	return err;
}

static void wf_sat_release(struct kref *ref)
{
	struct wf_sat *sat = container_of(ref, struct wf_sat, ref);

	if (sat->nr >= 0)
		sats[sat->nr] = NULL;
	kfree(sat);
}

static void wf_sat_sensor_release(struct wf_sensor *sr)
{
	struct wf_sat_sensor *sens = wf_to_sat(sr);
	struct wf_sat *sat = sens->sat;

	kfree(sens);
	kref_put(&sat->ref, wf_sat_release);
}

static const struct wf_sensor_ops wf_sat_ops = {
	.get_value	= wf_sat_sensor_get,
	.release	= wf_sat_sensor_release,
	.owner		= THIS_MODULE,
};

static int wf_sat_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct device_node *dev = client->dev.of_node;
	struct wf_sat *sat;
	struct wf_sat_sensor *sens;
	const u32 *reg;
	const char *loc, *type;
	u8 chip, core;
	struct device_node *child;
	int shift, cpu, index;
	char *name;
	int vsens[2], isens[2];

	sat = kzalloc(sizeof(struct wf_sat), GFP_KERNEL);
	if (sat == NULL)
		return -ENOMEM;
	sat->nr = -1;
	sat->node = of_node_get(dev);
	kref_init(&sat->ref);
	mutex_init(&sat->mutex);
	sat->i2c = client;
	INIT_LIST_HEAD(&sat->sensors);
	i2c_set_clientdata(client, sat);

	vsens[0] = vsens[1] = -1;
	isens[0] = isens[1] = -1;
	child = NULL;
	while ((child = of_get_next_child(dev, child)) != NULL) {
		reg = of_get_property(child, "reg", NULL);
		type = of_get_property(child, "device_type", NULL);
		loc = of_get_property(child, "location", NULL);
		if (reg == NULL || loc == NULL)
			continue;

		/* the cooked sensors are between 0x30 and 0x37 */
		if (*reg < 0x30 || *reg > 0x37)
			continue;
		index = *reg - 0x30;

		/* expect location to be CPU [AB][01] ... */
		if (strncmp(loc, "CPU ", 4) != 0)
			continue;
		chip = loc[4] - 'A';
		core = loc[5] - '0';
		if (chip > 1 || core > 1) {
			printk(KERN_ERR "wf_sat_create: don't understand "
			       "location %s for %pOF\n", loc, child);
			continue;
		}
		cpu = 2 * chip + core;
		if (sat->nr < 0)
			sat->nr = chip;
		else if (sat->nr != chip) {
			printk(KERN_ERR "wf_sat_create: can't cope with "
			       "multiple CPU chips on one SAT (%s)\n", loc);
			continue;
		}

		if (strcmp(type, "voltage-sensor") == 0) {
			name = "cpu-voltage";
			shift = 4;
			vsens[core] = index;
		} else if (strcmp(type, "current-sensor") == 0) {
			name = "cpu-current";
			shift = 8;
			isens[core] = index;
		} else if (strcmp(type, "temp-sensor") == 0) {
			name = "cpu-temp";
			shift = 10;
		} else
			continue;	/* hmmm shouldn't happen */

		/* the +16 is enough for "cpu-voltage-n" */
		sens = kzalloc(sizeof(struct wf_sat_sensor) + 16, GFP_KERNEL);
		if (sens == NULL) {
			printk(KERN_ERR "wf_sat_create: couldn't create "
			       "%s sensor %d (no memory)\n", name, cpu);
			continue;
		}
		sens->index = index;
		sens->index2 = -1;
		sens->shift = shift;
		sens->sat = sat;
		sens->sens.ops = &wf_sat_ops;
		sens->sens.name = (char *) (sens + 1);
		snprintf((char *)sens->sens.name, 16, "%s-%d", name, cpu);

		if (wf_register_sensor(&sens->sens))
			kfree(sens);
		else {
			list_add(&sens->link, &sat->sensors);
			kref_get(&sat->ref);
		}
	}

	/* make the power sensors */
	for (core = 0; core < 2; ++core) {
		if (vsens[core] < 0 || isens[core] < 0)
			continue;
		cpu = 2 * sat->nr + core;
		sens = kzalloc(sizeof(struct wf_sat_sensor) + 16, GFP_KERNEL);
		if (sens == NULL) {
			printk(KERN_ERR "wf_sat_create: couldn't create power "
			       "sensor %d (no memory)\n", cpu);
			continue;
		}
		sens->index = vsens[core];
		sens->index2 = isens[core];
		sens->shift = 0;
		sens->sat = sat;
		sens->sens.ops = &wf_sat_ops;
		sens->sens.name = (char *) (sens + 1);
		snprintf((char *)sens->sens.name, 16, "cpu-power-%d", cpu);

		if (wf_register_sensor(&sens->sens))
			kfree(sens);
		else {
			list_add(&sens->link, &sat->sensors);
			kref_get(&sat->ref);
		}
	}

	if (sat->nr >= 0)
		sats[sat->nr] = sat;

	return 0;
}

static int wf_sat_remove(struct i2c_client *client)
{
	struct wf_sat *sat = i2c_get_clientdata(client);
	struct wf_sat_sensor *sens;

	/* release sensors */
	while(!list_empty(&sat->sensors)) {
		sens = list_first_entry(&sat->sensors,
					struct wf_sat_sensor, link);
		list_del(&sens->link);
		wf_unregister_sensor(&sens->sens);
	}
	sat->i2c = NULL;
	kref_put(&sat->ref, wf_sat_release);

	return 0;
}

static const struct i2c_device_id wf_sat_id[] = {
	{ "MAC,smu-sat", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wf_sat_id);

static struct i2c_driver wf_sat_driver = {
	.driver = {
		.name		= "wf_smu_sat",
	},
	.probe		= wf_sat_probe,
	.remove		= wf_sat_remove,
	.id_table	= wf_sat_id,
};

module_i2c_driver(wf_sat_driver);

MODULE_AUTHOR("Paul Mackerras <paulus@samba.org>");
MODULE_DESCRIPTION("SMU satellite sensors for PowerMac thermal control");
MODULE_LICENSE("GPL");
Commit	Line	Data
ac171c46 BH	1	/*
	2	* Windfarm PowerMac thermal control. SMU "satellite" controller sensors.
	3	*
	4	* Copyright (C) 2005 Paul Mackerras, IBM Corp. <paulus@samba.org>
	5	*
	6	* Released under the terms of the GNU GPL v2.
	7	*/
	8
	9	#include <linux/types.h>
	10	#include <linux/errno.h>
	11	#include <linux/kernel.h>
	12	#include <linux/slab.h>
	13	#include <linux/init.h>
	14	#include <linux/wait.h>
	15	#include <linux/i2c.h>
56783c5e	16	#include <linux/mutex.h>
ac171c46 BH	17	#include <asm/prom.h>
	18	#include <asm/smu.h>
	19	#include <asm/pmac_low_i2c.h>
	20
	21	#include "windfarm.h"
	22
e326b30f	23	#define VERSION "1.0"
ac171c46	24
ac171c46 BH	25	/* If the cache is older than 800ms we'll refetch it */
	26	#define MAX_AGE msecs_to_jiffies(800)
	27
	28	struct wf_sat {
e326b30f	29	struct kref ref;
ac171c46	30	int nr;
56783c5e	31	struct mutex mutex;
ac171c46 BH	32	unsigned long last_read; /* jiffies when cache last updated */
ac171c46 BH	33	u8 cache[16];
e326b30f	34	struct list_head sensors;
351ca3e3	35	struct i2c_client *i2c;
ac171c46 BH	36	struct device_node *node;
	37	};
	38
	39	static struct wf_sat *sats[2];
	40
	41	struct wf_sat_sensor {
e326b30f BH	42	struct list_head link;
	43	int index;
	44	int index2; /* used for power sensors */
	45	int shift;
	46	struct wf_sat *sat;
	47	struct wf_sensor sens;
ac171c46 BH	48	};
	49
	50	#define wf_to_sat(c) container_of(c, struct wf_sat_sensor, sens)
ac171c46	51
ac171c46 BH	52	struct smu_sdbp_header *smu_sat_get_sdb_partition(unsigned int sat_id, int id,
	53	unsigned int *size)
	54	{
	55	struct wf_sat *sat;
	56	int err;
	57	unsigned int i, len;
	58	u8 *buf;
	59	u8 data[4];
	60
	61	/* TODO: Add the resulting partition to the device-tree */
	62
	63	if (sat_id > 1 \|\| (sat = sats[sat_id]) == NULL)
	64	return NULL;
	65
351ca3e3	66	err = i2c_smbus_write_word_data(sat->i2c, 8, id << 8);
ac171c46 BH	67	if (err) {
	68	printk(KERN_ERR "smu_sat_get_sdb_part wr error %d\n", err);
	69	return NULL;
	70	}
	71
351ca3e3	72	err = i2c_smbus_read_word_data(sat->i2c, 9);
2fd091f3	73	if (err < 0) {
ac171c46 BH	74	printk(KERN_ERR "smu_sat_get_sdb_part rd len error\n");
	75	return NULL;
	76	}
2fd091f3	77	len = err;
ac171c46 BH	78	if (len == 0) {
	79	printk(KERN_ERR "smu_sat_get_sdb_part no partition %x\n", id);
	80	return NULL;
	81	}
	82
	83	len = le16_to_cpu(len);
	84	len = (len + 3) & ~3;
	85	buf = kmalloc(len, GFP_KERNEL);
	86	if (buf == NULL)
	87	return NULL;
	88
	89	for (i = 0; i < len; i += 4) {
351ca3e3	90	err = i2c_smbus_read_i2c_block_data(sat->i2c, 0xa, 4, data);
4b2643d7	91	if (err < 0) {
ac171c46 BH	92	printk(KERN_ERR "smu_sat_get_sdb_part rd err %d\n",
	93	err);
	94	goto fail;
	95	}
	96	buf[i] = data[1];
	97	buf[i+1] = data[0];
	98	buf[i+2] = data[3];
	99	buf[i+3] = data[2];
	100	}
ac171c46	101
fc0c8b36 BH	102	printk(KERN_DEBUG "sat %d partition %x:", sat_id, id);
	103	print_hex_dump(KERN_DEBUG, " ", DUMP_PREFIX_OFFSET,
	104	16, 1, buf, len, false);
ac171c46 BH	105	if (size)
	106	*size = len;
	107	return (struct smu_sdbp_header *) buf;
	108
	109	fail:
	110	kfree(buf);
	111	return NULL;
	112	}
9127dd1a	113	EXPORT_SYMBOL_GPL(smu_sat_get_sdb_partition);
ac171c46 BH	114
	115	/* refresh the cache */
	116	static int wf_sat_read_cache(struct wf_sat *sat)
	117	{
	118	int err;
	119
351ca3e3	120	err = i2c_smbus_read_i2c_block_data(sat->i2c, 0x3f, 16, sat->cache);
4b2643d7	121	if (err < 0)
ac171c46 BH	122	return err;
ac171c46 BH	123	sat->last_read = jiffies;
fc0c8b36	124
ac171c46 BH	125	#ifdef LOTSA_DEBUG
	126	{
	127	int i;
fc0c8b36 BH	128	printk(KERN_DEBUG "wf_sat_get: data is");
	129	print_hex_dump(KERN_DEBUG, " ", DUMP_PREFIX_OFFSET,
	130	16, 1, sat->cache, 16, false);
ac171c46 BH	131	}
	132	#endif
	133	return 0;
	134	}
	135
e326b30f	136	static int wf_sat_sensor_get(struct wf_sensor sr, s32 value)
ac171c46 BH	137	{
	138	struct wf_sat_sensor *sens = wf_to_sat(sr);
	139	struct wf_sat *sat = sens->sat;
	140	int i, err;
	141	s32 val;
	142
351ca3e3	143	if (sat->i2c == NULL)
ac171c46 BH	144	return -ENODEV;
ac171c46 BH	145
56783c5e	146	mutex_lock(&sat->mutex);
ac171c46 BH	147	if (time_after(jiffies, (sat->last_read + MAX_AGE))) {
	148	err = wf_sat_read_cache(sat);
	149	if (err)
	150	goto fail;
	151	}
	152
	153	i = sens->index * 2;
	154	val = ((sat->cache[i] << 8) + sat->cache[i+1]) << sens->shift;
	155	if (sens->index2 >= 0) {
	156	i = sens->index2 * 2;
	157	/* 4.12 * 8.8 -> 12.20; shift right 4 to get 16.16 */
	158	val = (val * ((sat->cache[i] << 8) + sat->cache[i+1])) >> 4;
	159	}
	160
	161	*value = val;
	162	err = 0;
	163
	164	fail:
56783c5e	165	mutex_unlock(&sat->mutex);
ac171c46 BH	166	return err;
	167	}
	168
e326b30f BH	169	static void wf_sat_release(struct kref *ref)
	170	{
	171	struct wf_sat *sat = container_of(ref, struct wf_sat, ref);
	172
	173	if (sat->nr >= 0)
	174	sats[sat->nr] = NULL;
	175	kfree(sat);
	176	}
	177
	178	static void wf_sat_sensor_release(struct wf_sensor *sr)
ac171c46 BH	179	{
	180	struct wf_sat_sensor *sens = wf_to_sat(sr);
	181	struct wf_sat *sat = sens->sat;
	182
ac171c46	183	kfree(sens);
e326b30f	184	kref_put(&sat->ref, wf_sat_release);
ac171c46 BH	185	}
ac171c46 BH	186
de854e54	187	static const struct wf_sensor_ops wf_sat_ops = {
e326b30f BH	188	.get_value = wf_sat_sensor_get,
e326b30f BH	189	.release = wf_sat_sensor_release,
ac171c46 BH	190	.owner = THIS_MODULE,
	191	};
	192
351ca3e3 JD	193	static int wf_sat_probe(struct i2c_client *client,
	194	const struct i2c_device_id *id)
	195	{
9525a08b	196	struct device_node *dev = client->dev.of_node;
ac171c46 BH	197	struct wf_sat *sat;
ac171c46 BH	198	struct wf_sat_sensor *sens;
018a3d1d JK	199	const u32 *reg;
018a3d1d JK	200	const char loc, type;
351ca3e3	201	u8 chip, core;
ac171c46 BH	202	struct device_node *child;
	203	int shift, cpu, index;
	204	char *name;
	205	int vsens[2], isens[2];
	206
ac171c46 BH	207	sat = kzalloc(sizeof(struct wf_sat), GFP_KERNEL);
ac171c46 BH	208	if (sat == NULL)
351ca3e3	209	return -ENOMEM;
ac171c46 BH	210	sat->nr = -1;
ac171c46 BH	211	sat->node = of_node_get(dev);
e326b30f	212	kref_init(&sat->ref);
56783c5e	213	mutex_init(&sat->mutex);
351ca3e3	214	sat->i2c = client;
e326b30f	215	INIT_LIST_HEAD(&sat->sensors);
351ca3e3	216	i2c_set_clientdata(client, sat);
ac171c46 BH	217
	218	vsens[0] = vsens[1] = -1;
	219	isens[0] = isens[1] = -1;
	220	child = NULL;
	221	while ((child = of_get_next_child(dev, child)) != NULL) {
01b2726d SR	222	reg = of_get_property(child, "reg", NULL);
	223	type = of_get_property(child, "device_type", NULL);
	224	loc = of_get_property(child, "location", NULL);
ac171c46 BH	225	if (reg == NULL \|\| loc == NULL)
	226	continue;
	227
	228	/* the cooked sensors are between 0x30 and 0x37 */
	229	if (reg < 0x30 \|\| reg > 0x37)
	230	continue;
	231	index = *reg - 0x30;
	232
	233	/* expect location to be CPU [AB][01] ... */
	234	if (strncmp(loc, "CPU ", 4) != 0)
	235	continue;
	236	chip = loc[4] - 'A';
	237	core = loc[5] - '0';
	238	if (chip > 1 \|\| core > 1) {
	239	printk(KERN_ERR "wf_sat_create: don't understand "
b6a945ae	240	"location %s for %pOF\n", loc, child);
ac171c46 BH	241	continue;
	242	}
	243	cpu = 2 * chip + core;
	244	if (sat->nr < 0)
	245	sat->nr = chip;
	246	else if (sat->nr != chip) {
	247	printk(KERN_ERR "wf_sat_create: can't cope with "
	248	"multiple CPU chips on one SAT (%s)\n", loc);
	249	continue;
	250	}
	251
	252	if (strcmp(type, "voltage-sensor") == 0) {
	253	name = "cpu-voltage";
	254	shift = 4;
	255	vsens[core] = index;
	256	} else if (strcmp(type, "current-sensor") == 0) {
	257	name = "cpu-current";
	258	shift = 8;
	259	isens[core] = index;
	260	} else if (strcmp(type, "temp-sensor") == 0) {
	261	name = "cpu-temp";
	262	shift = 10;
	263	} else
	264	continue; /* hmmm shouldn't happen */
	265
	266	/* the +16 is enough for "cpu-voltage-n" */
	267	sens = kzalloc(sizeof(struct wf_sat_sensor) + 16, GFP_KERNEL);
	268	if (sens == NULL) {
	269	printk(KERN_ERR "wf_sat_create: couldn't create "
	270	"%s sensor %d (no memory)\n", name, cpu);
	271	continue;
	272	}
	273	sens->index = index;
	274	sens->index2 = -1;
	275	sens->shift = shift;
	276	sens->sat = sat;
ac171c46 BH	277	sens->sens.ops = &wf_sat_ops;
ac171c46 BH	278	sens->sens.name = (char *) (sens + 1);
43671cc9	279	snprintf((char *)sens->sens.name, 16, "%s-%d", name, cpu);
ac171c46	280
e326b30f	281	if (wf_register_sensor(&sens->sens))
ac171c46	282	kfree(sens);
e326b30f BH	283	else {
	284	list_add(&sens->link, &sat->sensors);
	285	kref_get(&sat->ref);
ac171c46 BH	286	}
	287	}
	288
	289	/* make the power sensors */
	290	for (core = 0; core < 2; ++core) {
	291	if (vsens[core] < 0 \|\| isens[core] < 0)
	292	continue;
	293	cpu = 2 * sat->nr + core;
	294	sens = kzalloc(sizeof(struct wf_sat_sensor) + 16, GFP_KERNEL);
	295	if (sens == NULL) {
	296	printk(KERN_ERR "wf_sat_create: couldn't create power "
	297	"sensor %d (no memory)\n", cpu);
	298	continue;
	299	}
	300	sens->index = vsens[core];
	301	sens->index2 = isens[core];
	302	sens->shift = 0;
	303	sens->sat = sat;
ac171c46 BH	304	sens->sens.ops = &wf_sat_ops;
ac171c46 BH	305	sens->sens.name = (char *) (sens + 1);
43671cc9	306	snprintf((char *)sens->sens.name, 16, "cpu-power-%d", cpu);
ac171c46	307
e326b30f	308	if (wf_register_sensor(&sens->sens))
ac171c46	309	kfree(sens);
e326b30f BH	310	else {
	311	list_add(&sens->link, &sat->sensors);
	312	kref_get(&sat->ref);
ac171c46 BH	313	}
	314	}
	315
	316	if (sat->nr >= 0)
	317	sats[sat->nr] = sat;
	318
351ca3e3	319	return 0;
ac171c46 BH	320	}
ac171c46 BH	321
351ca3e3	322	static int wf_sat_remove(struct i2c_client *client)
ac171c46	323	{
351ca3e3	324	struct wf_sat *sat = i2c_get_clientdata(client);
e326b30f	325	struct wf_sat_sensor *sens;
ac171c46	326
e326b30f BH	327	/* release sensors */
	328	while(!list_empty(&sat->sensors)) {
	329	sens = list_first_entry(&sat->sensors,
	330	struct wf_sat_sensor, link);
	331	list_del(&sens->link);
	332	wf_unregister_sensor(&sens->sens);
	333	}
351ca3e3	334	sat->i2c = NULL;
e326b30f BH	335	kref_put(&sat->ref, wf_sat_release);
e326b30f BH	336
ac171c46 BH	337	return 0;
	338	}
	339
351ca3e3	340	static const struct i2c_device_id wf_sat_id[] = {
e326b30f	341	{ "MAC,smu-sat", 0 },
351ca3e3 JD	342	{ }
351ca3e3 JD	343	};
e326b30f	344	MODULE_DEVICE_TABLE(i2c, wf_sat_id);
351ca3e3 JD	345
	346	static struct i2c_driver wf_sat_driver = {
	347	.driver = {
	348	.name = "wf_smu_sat",
	349	},
351ca3e3 JD	350	.probe = wf_sat_probe,
	351	.remove = wf_sat_remove,
	352	.id_table = wf_sat_id,
	353	};
	354
f7fb862b	355	module_i2c_driver(wf_sat_driver);
ac171c46 BH	356
	357	MODULE_AUTHOR("Paul Mackerras <paulus@samba.org>");
	358	MODULE_DESCRIPTION("SMU satellite sensors for PowerMac thermal control");
	359	MODULE_LICENSE("GPL");