[linux-2.6-block.git] / drivers / hwmon / ultra45_env.c

/* ultra45_env.c: Driver for Ultra45 PIC16F747 environmental monitor.
 *
 * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <linux/io.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>

#define DRV_MODULE_VERSION	"0.1"

MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
MODULE_DESCRIPTION("Ultra45 environmental monitor driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_MODULE_VERSION);

/* PIC device registers */
#define REG_CMD		0x00UL
#define  REG_CMD_RESET	0x80
#define  REG_CMD_ESTAR	0x01
#define REG_STAT	0x01UL
#define  REG_STAT_FWVER	0xf0
#define  REG_STAT_TGOOD	0x08
#define  REG_STAT_STALE	0x04
#define  REG_STAT_BUSY	0x02
#define  REG_STAT_FAULT	0x01
#define REG_DATA	0x40UL
#define REG_ADDR	0x41UL
#define REG_SIZE	0x42UL

/* Registers accessed indirectly via REG_DATA/REG_ADDR */
#define IREG_FAN0		0x00
#define IREG_FAN1		0x01
#define IREG_FAN2		0x02
#define IREG_FAN3		0x03
#define IREG_FAN4		0x04
#define IREG_FAN5		0x05
#define IREG_LCL_TEMP		0x06
#define IREG_RMT1_TEMP		0x07
#define IREG_RMT2_TEMP		0x08
#define IREG_RMT3_TEMP		0x09
#define IREG_LM95221_TEMP	0x0a
#define IREG_FIRE_TEMP		0x0b
#define IREG_LSI1064_TEMP	0x0c
#define IREG_FRONT_TEMP		0x0d
#define IREG_FAN_STAT		0x0e
#define IREG_VCORE0		0x0f
#define IREG_VCORE1		0x10
#define IREG_VMEM0		0x11
#define IREG_VMEM1		0x12
#define IREG_PSU_TEMP		0x13

struct env {
	void __iomem	*regs;
	spinlock_t	lock;

	struct device	*hwmon_dev;
};

static u8 env_read(struct env *p, u8 ireg)
{
	u8 ret;

	spin_lock(&p->lock);
	writeb(ireg, p->regs + REG_ADDR);
	ret = readb(p->regs + REG_DATA);
	spin_unlock(&p->lock);

	return ret;
}

static void env_write(struct env *p, u8 ireg, u8 val)
{
	spin_lock(&p->lock);
	writeb(ireg, p->regs + REG_ADDR);
	writeb(val, p->regs + REG_DATA);
	spin_unlock(&p->lock);
}

/* There seems to be a adr7462 providing these values, thus a lot
 * of these calculations are borrowed from the adt7470 driver.
 */
#define FAN_PERIOD_TO_RPM(x)	((90000 * 60) / (x))
#define FAN_RPM_TO_PERIOD	FAN_PERIOD_TO_RPM
#define FAN_PERIOD_INVALID	(0xff << 8)
#define FAN_DATA_VALID(x)	((x) && (x) != FAN_PERIOD_INVALID)

static ssize_t show_fan_speed(struct device *dev, struct device_attribute *attr, char *buf)
{
	int fan_nr = to_sensor_dev_attr(attr)->index;
	struct env *p = dev_get_drvdata(dev);
	int rpm, period;
	u8 val;

	val = env_read(p, IREG_FAN0 + fan_nr);
	period = (int) val << 8;
	if (FAN_DATA_VALID(period))
		rpm = FAN_PERIOD_TO_RPM(period);
	else
		rpm = 0;

	return sprintf(buf, "%d\n", rpm);
}

static ssize_t set_fan_speed(struct device *dev, struct device_attribute *attr,
			     const char *buf, size_t count)
{
	int fan_nr = to_sensor_dev_attr(attr)->index;
	int rpm = simple_strtol(buf, NULL, 10);
	struct env *p = dev_get_drvdata(dev);
	int period;
	u8 val;

	if (!rpm)
		return -EINVAL;

	period = FAN_RPM_TO_PERIOD(rpm);
	val = period >> 8;
	env_write(p, IREG_FAN0 + fan_nr, val);

	return count;
}

static ssize_t show_fan_fault(struct device *dev, struct device_attribute *attr, char *buf)
{
	int fan_nr = to_sensor_dev_attr(attr)->index;
	struct env *p = dev_get_drvdata(dev);
	u8 val = env_read(p, IREG_FAN_STAT);
	return sprintf(buf, "%d\n", (val & (1 << fan_nr)) ? 1 : 0);
}

#define fan(index)							\
static SENSOR_DEVICE_ATTR(fan##index##_speed, S_IRUGO | S_IWUSR,	\
		show_fan_speed, set_fan_speed, index);			\
static SENSOR_DEVICE_ATTR(fan##index##_fault, S_IRUGO,			\
		show_fan_fault, NULL, index)

fan(0);
fan(1);
fan(2);
fan(3);
fan(4);

static SENSOR_DEVICE_ATTR(psu_fan_fault, S_IRUGO, show_fan_fault, NULL, 6);

static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf)
{
	int temp_nr = to_sensor_dev_attr(attr)->index;
	struct env *p = dev_get_drvdata(dev);
	s8 val;

	val = env_read(p, IREG_LCL_TEMP + temp_nr);
	return sprintf(buf, "%d\n", ((int) val) - 64);
}

static SENSOR_DEVICE_ATTR(adt7462_local_temp, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(cpu0_temp, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(cpu1_temp, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(motherboard_temp, S_IRUGO, show_temp, NULL, 3);
static SENSOR_DEVICE_ATTR(lm95221_local_temp, S_IRUGO, show_temp, NULL, 4);
static SENSOR_DEVICE_ATTR(fire_temp, S_IRUGO, show_temp, NULL, 5);
static SENSOR_DEVICE_ATTR(lsi1064_local_temp, S_IRUGO, show_temp, NULL, 6);
static SENSOR_DEVICE_ATTR(front_panel_temp, S_IRUGO, show_temp, NULL, 7);
static SENSOR_DEVICE_ATTR(psu_temp, S_IRUGO, show_temp, NULL, 13);

static ssize_t show_stat_bit(struct device *dev, struct device_attribute *attr, char *buf)
{
	int index = to_sensor_dev_attr(attr)->index;
	struct env *p = dev_get_drvdata(dev);
	u8 val;

	val = readb(p->regs + REG_STAT);
	return sprintf(buf, "%d\n", (val & (1 << index)) ? 1 : 0);
}

static SENSOR_DEVICE_ATTR(fan_failure, S_IRUGO, show_stat_bit, NULL, 0);
static SENSOR_DEVICE_ATTR(env_bus_busy, S_IRUGO, show_stat_bit, NULL, 1);
static SENSOR_DEVICE_ATTR(env_data_stale, S_IRUGO, show_stat_bit, NULL, 2);
static SENSOR_DEVICE_ATTR(tpm_self_test_passed, S_IRUGO, show_stat_bit, NULL, 3);

static ssize_t show_fwver(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct env *p = dev_get_drvdata(dev);
	u8 val;

	val = readb(p->regs + REG_STAT);
	return sprintf(buf, "%d\n", val >> 4);
}

static SENSOR_DEVICE_ATTR(firmware_version, S_IRUGO, show_fwver, NULL, 0);

static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf)
{
	return sprintf(buf, "ultra45\n");
}

static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);

static struct attribute *env_attributes[] = {
	&sensor_dev_attr_fan0_speed.dev_attr.attr,
	&sensor_dev_attr_fan0_fault.dev_attr.attr,
	&sensor_dev_attr_fan1_speed.dev_attr.attr,
	&sensor_dev_attr_fan1_fault.dev_attr.attr,
	&sensor_dev_attr_fan2_speed.dev_attr.attr,
	&sensor_dev_attr_fan2_fault.dev_attr.attr,
	&sensor_dev_attr_fan3_speed.dev_attr.attr,
	&sensor_dev_attr_fan3_fault.dev_attr.attr,
	&sensor_dev_attr_fan4_speed.dev_attr.attr,
	&sensor_dev_attr_fan4_fault.dev_attr.attr,
	&sensor_dev_attr_psu_fan_fault.dev_attr.attr,
	&sensor_dev_attr_adt7462_local_temp.dev_attr.attr,
	&sensor_dev_attr_cpu0_temp.dev_attr.attr,
	&sensor_dev_attr_cpu1_temp.dev_attr.attr,
	&sensor_dev_attr_motherboard_temp.dev_attr.attr,
	&sensor_dev_attr_lm95221_local_temp.dev_attr.attr,
	&sensor_dev_attr_fire_temp.dev_attr.attr,
	&sensor_dev_attr_lsi1064_local_temp.dev_attr.attr,
	&sensor_dev_attr_front_panel_temp.dev_attr.attr,
	&sensor_dev_attr_psu_temp.dev_attr.attr,
	&sensor_dev_attr_fan_failure.dev_attr.attr,
	&sensor_dev_attr_env_bus_busy.dev_attr.attr,
	&sensor_dev_attr_env_data_stale.dev_attr.attr,
	&sensor_dev_attr_tpm_self_test_passed.dev_attr.attr,
	&sensor_dev_attr_firmware_version.dev_attr.attr,
	&sensor_dev_attr_name.dev_attr.attr,
	NULL,
};

static const struct attribute_group env_group = {
	.attrs = env_attributes,
};

static int __devinit env_probe(struct of_device *op,
			       const struct of_device_id *match)
{
	struct env *p = kzalloc(sizeof(*p), GFP_KERNEL);
	int err = -ENOMEM;

	if (!p)
		goto out;

	spin_lock_init(&p->lock);

	p->regs = of_ioremap(&op->resource[0], 0, REG_SIZE, "pic16f747");
	if (!p->regs)
		goto out_free;

	err = sysfs_create_group(&op->dev.kobj, &env_group);
	if (err)
		goto out_iounmap;

	p->hwmon_dev = hwmon_device_register(&op->dev);
	if (IS_ERR(p->hwmon_dev)) {
		err = PTR_ERR(p->hwmon_dev);
		goto out_sysfs_remove_group;
	}

	dev_set_drvdata(&op->dev, p);
	err = 0;

out:
	return err;

out_sysfs_remove_group:
	sysfs_remove_group(&op->dev.kobj, &env_group);

out_iounmap:
	of_iounmap(&op->resource[0], p->regs, REG_SIZE);

out_free:
	kfree(p);
	goto out;
}

static int __devexit env_remove(struct of_device *op)
{
	struct env *p = dev_get_drvdata(&op->dev);

	if (p) {
		sysfs_remove_group(&op->dev.kobj, &env_group);
		hwmon_device_unregister(p->hwmon_dev);
		of_iounmap(&op->resource[0], p->regs, REG_SIZE);
		kfree(p);
	}

	return 0;
}

static const struct of_device_id env_match[] = {
	{
		.name = "env-monitor",
		.compatible = "SUNW,ebus-pic16f747-env",
	},
	{},
};
MODULE_DEVICE_TABLE(of, env_match);

static struct of_platform_driver env_driver = {
	.name		= "ultra45_env",
	.match_table	= env_match,
	.probe		= env_probe,
	.remove		= __devexit_p(env_remove),
};

static int __init env_init(void)
{
	return of_register_driver(&env_driver, &of_bus_type);
}

static void __exit env_exit(void)
{
	of_unregister_driver(&env_driver);
}

module_init(env_init);
module_exit(env_exit);
Commit	Line	Data
e0418088 DM	1	/* ultra45_env.c: Driver for Ultra45 PIC16F747 environmental monitor.
	2	*
	3	* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
	4	*/
	5
	6	#include <linux/kernel.h>
	7	#include <linux/types.h>
	8	#include <linux/slab.h>
	9	#include <linux/of_device.h>
	10	#include <linux/io.h>
	11	#include <linux/hwmon.h>
	12	#include <linux/hwmon-sysfs.h>
	13
	14	#define DRV_MODULE_VERSION "0.1"
	15
	16	MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
	17	MODULE_DESCRIPTION("Ultra45 environmental monitor driver");
	18	MODULE_LICENSE("GPL");
	19	MODULE_VERSION(DRV_MODULE_VERSION);
	20
	21	/* PIC device registers */
	22	#define REG_CMD 0x00UL
	23	#define REG_CMD_RESET 0x80
	24	#define REG_CMD_ESTAR 0x01
	25	#define REG_STAT 0x01UL
	26	#define REG_STAT_FWVER 0xf0
	27	#define REG_STAT_TGOOD 0x08
	28	#define REG_STAT_STALE 0x04
	29	#define REG_STAT_BUSY 0x02
	30	#define REG_STAT_FAULT 0x01
	31	#define REG_DATA 0x40UL
	32	#define REG_ADDR 0x41UL
	33	#define REG_SIZE 0x42UL
	34
	35	/* Registers accessed indirectly via REG_DATA/REG_ADDR */
	36	#define IREG_FAN0 0x00
	37	#define IREG_FAN1 0x01
	38	#define IREG_FAN2 0x02
	39	#define IREG_FAN3 0x03
	40	#define IREG_FAN4 0x04
	41	#define IREG_FAN5 0x05
	42	#define IREG_LCL_TEMP 0x06
	43	#define IREG_RMT1_TEMP 0x07
	44	#define IREG_RMT2_TEMP 0x08
	45	#define IREG_RMT3_TEMP 0x09
	46	#define IREG_LM95221_TEMP 0x0a
	47	#define IREG_FIRE_TEMP 0x0b
	48	#define IREG_LSI1064_TEMP 0x0c
	49	#define IREG_FRONT_TEMP 0x0d
	50	#define IREG_FAN_STAT 0x0e
	51	#define IREG_VCORE0 0x0f
	52	#define IREG_VCORE1 0x10
	53	#define IREG_VMEM0 0x11
	54	#define IREG_VMEM1 0x12
	55	#define IREG_PSU_TEMP 0x13
	56
	57	struct env {
	58	void __iomem *regs;
	59	spinlock_t lock;
	60
	61	struct device *hwmon_dev;
	62	};
	63
	64	static u8 env_read(struct env *p, u8 ireg)
65	{
66	u8 ret;
67
68	spin_lock(&p->lock);
69	writeb(ireg, p->regs + REG_ADDR);
70	ret = readb(p->regs + REG_DATA);
71	spin_unlock(&p->lock);
72
73	return ret;
74	}
75
76	static void env_write(struct env *p, u8 ireg, u8 val)
77	{
78	spin_lock(&p->lock);
79	writeb(ireg, p->regs + REG_ADDR);
80	writeb(val, p->regs + REG_DATA);
81	spin_unlock(&p->lock);
82	}
83
84	/* There seems to be a adr7462 providing these values, thus a lot
85	* of these calculations are borrowed from the adt7470 driver.
86	*/
87	#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
88	#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
89	#define FAN_PERIOD_INVALID (0xff << 8)
90	#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
91
92	static ssize_t show_fan_speed(struct device dev, struct device_attribute attr, char *buf)
93	{
94	int fan_nr = to_sensor_dev_attr(attr)->index;
95	struct env *p = dev_get_drvdata(dev);
96	int rpm, period;
97	u8 val;
98
99	val = env_read(p, IREG_FAN0 + fan_nr);
100	period = (int) val << 8;
101	if (FAN_DATA_VALID(period))
102	rpm = FAN_PERIOD_TO_RPM(period);
103	else
104	rpm = 0;
105
106	return sprintf(buf, "%d\n", rpm);
107	}
108
109	static ssize_t set_fan_speed(struct device dev, struct device_attribute attr,
110	const char *buf, size_t count)
111	{
112	int fan_nr = to_sensor_dev_attr(attr)->index;
113	int rpm = simple_strtol(buf, NULL, 10);
114	struct env *p = dev_get_drvdata(dev);
115	int period;
116	u8 val;
117
118	if (!rpm)
119	return -EINVAL;
120
121	period = FAN_RPM_TO_PERIOD(rpm);
122	val = period >> 8;
123	env_write(p, IREG_FAN0 + fan_nr, val);
124
125	return count;
126	}
127
128	static ssize_t show_fan_fault(struct device dev, struct device_attribute attr, char *buf)
129	{
130	int fan_nr = to_sensor_dev_attr(attr)->index;
131	struct env *p = dev_get_drvdata(dev);
132	u8 val = env_read(p, IREG_FAN_STAT);
133	return sprintf(buf, "%d\n", (val & (1 << fan_nr)) ? 1 : 0);
134	}
135
136	#define fan(index) \
137	static SENSOR_DEVICE_ATTR(fan##index##_speed, S_IRUGO \| S_IWUSR, \
138	show_fan_speed, set_fan_speed, index); \
139	static SENSOR_DEVICE_ATTR(fan##index##_fault, S_IRUGO, \
140	show_fan_fault, NULL, index)
141
142	fan(0);
143	fan(1);
144	fan(2);
145	fan(3);
146	fan(4);
147
148	static SENSOR_DEVICE_ATTR(psu_fan_fault, S_IRUGO, show_fan_fault, NULL, 6);
149
150	static ssize_t show_temp(struct device dev, struct device_attribute attr, char *buf)
151	{
152	int temp_nr = to_sensor_dev_attr(attr)->index;
153	struct env *p = dev_get_drvdata(dev);
154	s8 val;
155
156	val = env_read(p, IREG_LCL_TEMP + temp_nr);
157	return sprintf(buf, "%d\n", ((int) val) - 64);
158	}
159
160	static SENSOR_DEVICE_ATTR(adt7462_local_temp, S_IRUGO, show_temp, NULL, 0);
161	static SENSOR_DEVICE_ATTR(cpu0_temp, S_IRUGO, show_temp, NULL, 1);
162	static SENSOR_DEVICE_ATTR(cpu1_temp, S_IRUGO, show_temp, NULL, 2);
163	static SENSOR_DEVICE_ATTR(motherboard_temp, S_IRUGO, show_temp, NULL, 3);
164	static SENSOR_DEVICE_ATTR(lm95221_local_temp, S_IRUGO, show_temp, NULL, 4);
165	static SENSOR_DEVICE_ATTR(fire_temp, S_IRUGO, show_temp, NULL, 5);
166	static SENSOR_DEVICE_ATTR(lsi1064_local_temp, S_IRUGO, show_temp, NULL, 6);
167	static SENSOR_DEVICE_ATTR(front_panel_temp, S_IRUGO, show_temp, NULL, 7);
168	static SENSOR_DEVICE_ATTR(psu_temp, S_IRUGO, show_temp, NULL, 13);
169
170	static ssize_t show_stat_bit(struct device dev, struct device_attribute attr, char *buf)
171	{
172	int index = to_sensor_dev_attr(attr)->index;
173	struct env *p = dev_get_drvdata(dev);
174	u8 val;
175
176	val = readb(p->regs + REG_STAT);
177	return sprintf(buf, "%d\n", (val & (1 << index)) ? 1 : 0);
178	}
179
180	static SENSOR_DEVICE_ATTR(fan_failure, S_IRUGO, show_stat_bit, NULL, 0);
181	static SENSOR_DEVICE_ATTR(env_bus_busy, S_IRUGO, show_stat_bit, NULL, 1);
182	static SENSOR_DEVICE_ATTR(env_data_stale, S_IRUGO, show_stat_bit, NULL, 2);
183	static SENSOR_DEVICE_ATTR(tpm_self_test_passed, S_IRUGO, show_stat_bit, NULL, 3);
184
185	static ssize_t show_fwver(struct device dev, struct device_attribute attr, char *buf)
186	{
187	struct env *p = dev_get_drvdata(dev);
188	u8 val;
189
190	val = readb(p->regs + REG_STAT);
191	return sprintf(buf, "%d\n", val >> 4);
192	}
193
194	static SENSOR_DEVICE_ATTR(firmware_version, S_IRUGO, show_fwver, NULL, 0);
195
196	static ssize_t show_name(struct device dev, struct device_attribute attr, char *buf)
197	{
198	return sprintf(buf, "ultra45\n");
199	}
200
201	static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
202
203	static struct attribute *env_attributes[] = {
204	&sensor_dev_attr_fan0_speed.dev_attr.attr,
205	&sensor_dev_attr_fan0_fault.dev_attr.attr,
206	&sensor_dev_attr_fan1_speed.dev_attr.attr,
207	&sensor_dev_attr_fan1_fault.dev_attr.attr,
208	&sensor_dev_attr_fan2_speed.dev_attr.attr,
209	&sensor_dev_attr_fan2_fault.dev_attr.attr,
210	&sensor_dev_attr_fan3_speed.dev_attr.attr,
211	&sensor_dev_attr_fan3_fault.dev_attr.attr,
212	&sensor_dev_attr_fan4_speed.dev_attr.attr,
213	&sensor_dev_attr_fan4_fault.dev_attr.attr,
214	&sensor_dev_attr_psu_fan_fault.dev_attr.attr,
215	&sensor_dev_attr_adt7462_local_temp.dev_attr.attr,
216	&sensor_dev_attr_cpu0_temp.dev_attr.attr,
217	&sensor_dev_attr_cpu1_temp.dev_attr.attr,
218	&sensor_dev_attr_motherboard_temp.dev_attr.attr,
219	&sensor_dev_attr_lm95221_local_temp.dev_attr.attr,
220	&sensor_dev_attr_fire_temp.dev_attr.attr,
221	&sensor_dev_attr_lsi1064_local_temp.dev_attr.attr,
222	&sensor_dev_attr_front_panel_temp.dev_attr.attr,
223	&sensor_dev_attr_psu_temp.dev_attr.attr,
224	&sensor_dev_attr_fan_failure.dev_attr.attr,
225	&sensor_dev_attr_env_bus_busy.dev_attr.attr,
226	&sensor_dev_attr_env_data_stale.dev_attr.attr,
227	&sensor_dev_attr_tpm_self_test_passed.dev_attr.attr,
228	&sensor_dev_attr_firmware_version.dev_attr.attr,
229	&sensor_dev_attr_name.dev_attr.attr,
230	NULL,
231	};
232
233	static const struct attribute_group env_group = {
234	.attrs = env_attributes,
235	};
236
237	static int __devinit env_probe(struct of_device *op,
238	const struct of_device_id *match)
239	{
240	struct env p = kzalloc(sizeof(p), GFP_KERNEL);
241	int err = -ENOMEM;
242
243	if (!p)
244	goto out;
245
246	spin_lock_init(&p->lock);
247
248	p->regs = of_ioremap(&op->resource[0], 0, REG_SIZE, "pic16f747");
249	if (!p->regs)
250	goto out_free;
251
252	err = sysfs_create_group(&op->dev.kobj, &env_group);
253	if (err)
254	goto out_iounmap;
255
256	p->hwmon_dev = hwmon_device_register(&op->dev);
257	if (IS_ERR(p->hwmon_dev)) {
258	err = PTR_ERR(p->hwmon_dev);
259	goto out_sysfs_remove_group;
260	}
261
262	dev_set_drvdata(&op->dev, p);
263	err = 0;
264
265	out:
266	return err;
267
268	out_sysfs_remove_group:
269	sysfs_remove_group(&op->dev.kobj, &env_group);
270
271	out_iounmap:
272	of_iounmap(&op->resource[0], p->regs, REG_SIZE);
273
274	out_free:
275	kfree(p);
276	goto out;
277	}
278
279	static int __devexit env_remove(struct of_device *op)
280	{
281	struct env *p = dev_get_drvdata(&op->dev);
282
283	if (p) {
284	sysfs_remove_group(&op->dev.kobj, &env_group);
285	hwmon_device_unregister(p->hwmon_dev);
286	of_iounmap(&op->resource[0], p->regs, REG_SIZE);
287	kfree(p);
288	}
289
290	return 0;
291	}
292
fd098316	293	static const struct of_device_id env_match[] = {
e0418088 DM	294	{
	295	.name = "env-monitor",
	296	.compatible = "SUNW,ebus-pic16f747-env",
	297	},
	298	{},
	299	};
	300	MODULE_DEVICE_TABLE(of, env_match);
	301
	302	static struct of_platform_driver env_driver = {
	303	.name = "ultra45_env",
	304	.match_table = env_match,
	305	.probe = env_probe,
	306	.remove = __devexit_p(env_remove),
	307	};
	308
	309	static int __init env_init(void)
	310	{
	311	return of_register_driver(&env_driver, &of_bus_type);
	312	}
	313
	314	static void __exit env_exit(void)
	315	{
	316	of_unregister_driver(&env_driver);
	317	}
	318
	319	module_init(env_init);
	320	module_exit(env_exit);