xref: /openbmc/linux/drivers/hwmon/sch5636.c (revision 12eb4683)
1 /***************************************************************************
2  *   Copyright (C) 2011-2012 Hans de Goede <hdegoede@redhat.com>           *
3  *                                                                         *
4  *   This program is free software; you can redistribute it and/or modify  *
5  *   it under the terms of the GNU General Public License as published by  *
6  *   the Free Software Foundation; either version 2 of the License, or     *
7  *   (at your option) any later version.                                   *
8  *                                                                         *
9  *   This program is distributed in the hope that it will be useful,       *
10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
12  *   GNU General Public License for more details.                          *
13  *                                                                         *
14  *   You should have received a copy of the GNU General Public License     *
15  *   along with this program; if not, write to the                         *
16  *   Free Software Foundation, Inc.,                                       *
17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
18  ***************************************************************************/
19 
20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/slab.h>
25 #include <linux/jiffies.h>
26 #include <linux/platform_device.h>
27 #include <linux/hwmon.h>
28 #include <linux/hwmon-sysfs.h>
29 #include <linux/err.h>
30 #include <linux/mutex.h>
31 #include "sch56xx-common.h"
32 
33 #define DRVNAME "sch5636"
34 #define DEVNAME "theseus" /* We only support one model for now */
35 
36 #define SCH5636_REG_FUJITSU_ID		0x780
37 #define SCH5636_REG_FUJITSU_REV		0x783
38 
39 #define SCH5636_NO_INS			5
40 #define SCH5636_NO_TEMPS		16
41 #define SCH5636_NO_FANS			8
42 
43 static const u16 SCH5636_REG_IN_VAL[SCH5636_NO_INS] = {
44 	0x22, 0x23, 0x24, 0x25, 0x189 };
45 static const u16 SCH5636_REG_IN_FACTORS[SCH5636_NO_INS] = {
46 	4400, 1500, 4000, 4400, 16000 };
47 static const char * const SCH5636_IN_LABELS[SCH5636_NO_INS] = {
48 	"3.3V", "VREF", "VBAT", "3.3AUX", "12V" };
49 
50 static const u16 SCH5636_REG_TEMP_VAL[SCH5636_NO_TEMPS] = {
51 	0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181,
52 	0x85, 0x86, 0x87, 0x88, 0x89, 0x8A, 0x8B, 0x8C };
53 #define SCH5636_REG_TEMP_CTRL(i)	(0x790 + (i))
54 #define SCH5636_TEMP_WORKING		0x01
55 #define SCH5636_TEMP_ALARM		0x02
56 #define SCH5636_TEMP_DEACTIVATED	0x80
57 
58 static const u16 SCH5636_REG_FAN_VAL[SCH5636_NO_FANS] = {
59 	0x2C, 0x2E, 0x30, 0x32, 0x62, 0x64, 0x66, 0x68 };
60 #define SCH5636_REG_FAN_CTRL(i)		(0x880 + (i))
61 /* FAULT in datasheet, but acts as an alarm */
62 #define SCH5636_FAN_ALARM		0x04
63 #define SCH5636_FAN_NOT_PRESENT		0x08
64 #define SCH5636_FAN_DEACTIVATED		0x80
65 
66 
67 struct sch5636_data {
68 	unsigned short addr;
69 	struct device *hwmon_dev;
70 	struct sch56xx_watchdog_data *watchdog;
71 
72 	struct mutex update_lock;
73 	char valid;			/* !=0 if following fields are valid */
74 	unsigned long last_updated;	/* In jiffies */
75 	u8 in[SCH5636_NO_INS];
76 	u8 temp_val[SCH5636_NO_TEMPS];
77 	u8 temp_ctrl[SCH5636_NO_TEMPS];
78 	u16 fan_val[SCH5636_NO_FANS];
79 	u8 fan_ctrl[SCH5636_NO_FANS];
80 };
81 
82 static struct sch5636_data *sch5636_update_device(struct device *dev)
83 {
84 	struct sch5636_data *data = dev_get_drvdata(dev);
85 	struct sch5636_data *ret = data;
86 	int i, val;
87 
88 	mutex_lock(&data->update_lock);
89 
90 	/* Cache the values for 1 second */
91 	if (data->valid && !time_after(jiffies, data->last_updated + HZ))
92 		goto abort;
93 
94 	for (i = 0; i < SCH5636_NO_INS; i++) {
95 		val = sch56xx_read_virtual_reg(data->addr,
96 					       SCH5636_REG_IN_VAL[i]);
97 		if (unlikely(val < 0)) {
98 			ret = ERR_PTR(val);
99 			goto abort;
100 		}
101 		data->in[i] = val;
102 	}
103 
104 	for (i = 0; i < SCH5636_NO_TEMPS; i++) {
105 		if (data->temp_ctrl[i] & SCH5636_TEMP_DEACTIVATED)
106 			continue;
107 
108 		val = sch56xx_read_virtual_reg(data->addr,
109 					       SCH5636_REG_TEMP_VAL[i]);
110 		if (unlikely(val < 0)) {
111 			ret = ERR_PTR(val);
112 			goto abort;
113 		}
114 		data->temp_val[i] = val;
115 
116 		val = sch56xx_read_virtual_reg(data->addr,
117 					       SCH5636_REG_TEMP_CTRL(i));
118 		if (unlikely(val < 0)) {
119 			ret = ERR_PTR(val);
120 			goto abort;
121 		}
122 		data->temp_ctrl[i] = val;
123 		/* Alarms need to be explicitly write-cleared */
124 		if (val & SCH5636_TEMP_ALARM) {
125 			sch56xx_write_virtual_reg(data->addr,
126 						SCH5636_REG_TEMP_CTRL(i), val);
127 		}
128 	}
129 
130 	for (i = 0; i < SCH5636_NO_FANS; i++) {
131 		if (data->fan_ctrl[i] & SCH5636_FAN_DEACTIVATED)
132 			continue;
133 
134 		val = sch56xx_read_virtual_reg16(data->addr,
135 						 SCH5636_REG_FAN_VAL[i]);
136 		if (unlikely(val < 0)) {
137 			ret = ERR_PTR(val);
138 			goto abort;
139 		}
140 		data->fan_val[i] = val;
141 
142 		val = sch56xx_read_virtual_reg(data->addr,
143 					       SCH5636_REG_FAN_CTRL(i));
144 		if (unlikely(val < 0)) {
145 			ret = ERR_PTR(val);
146 			goto abort;
147 		}
148 		data->fan_ctrl[i] = val;
149 		/* Alarms need to be explicitly write-cleared */
150 		if (val & SCH5636_FAN_ALARM) {
151 			sch56xx_write_virtual_reg(data->addr,
152 						SCH5636_REG_FAN_CTRL(i), val);
153 		}
154 	}
155 
156 	data->last_updated = jiffies;
157 	data->valid = 1;
158 abort:
159 	mutex_unlock(&data->update_lock);
160 	return ret;
161 }
162 
163 static int reg_to_rpm(u16 reg)
164 {
165 	if (reg == 0)
166 		return -EIO;
167 	if (reg == 0xffff)
168 		return 0;
169 
170 	return 5400540 / reg;
171 }
172 
173 static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
174 	char *buf)
175 {
176 	return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
177 }
178 
179 static ssize_t show_in_value(struct device *dev, struct device_attribute
180 	*devattr, char *buf)
181 {
182 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
183 	struct sch5636_data *data = sch5636_update_device(dev);
184 	int val;
185 
186 	if (IS_ERR(data))
187 		return PTR_ERR(data);
188 
189 	val = DIV_ROUND_CLOSEST(
190 		data->in[attr->index] * SCH5636_REG_IN_FACTORS[attr->index],
191 		255);
192 	return snprintf(buf, PAGE_SIZE, "%d\n", val);
193 }
194 
195 static ssize_t show_in_label(struct device *dev, struct device_attribute
196 	*devattr, char *buf)
197 {
198 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
199 
200 	return snprintf(buf, PAGE_SIZE, "%s\n",
201 			SCH5636_IN_LABELS[attr->index]);
202 }
203 
204 static ssize_t show_temp_value(struct device *dev, struct device_attribute
205 	*devattr, char *buf)
206 {
207 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
208 	struct sch5636_data *data = sch5636_update_device(dev);
209 	int val;
210 
211 	if (IS_ERR(data))
212 		return PTR_ERR(data);
213 
214 	val = (data->temp_val[attr->index] - 64) * 1000;
215 	return snprintf(buf, PAGE_SIZE, "%d\n", val);
216 }
217 
218 static ssize_t show_temp_fault(struct device *dev, struct device_attribute
219 	*devattr, char *buf)
220 {
221 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
222 	struct sch5636_data *data = sch5636_update_device(dev);
223 	int val;
224 
225 	if (IS_ERR(data))
226 		return PTR_ERR(data);
227 
228 	val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_WORKING) ? 0 : 1;
229 	return snprintf(buf, PAGE_SIZE, "%d\n", val);
230 }
231 
232 static ssize_t show_temp_alarm(struct device *dev, struct device_attribute
233 	*devattr, char *buf)
234 {
235 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
236 	struct sch5636_data *data = sch5636_update_device(dev);
237 	int val;
238 
239 	if (IS_ERR(data))
240 		return PTR_ERR(data);
241 
242 	val = (data->temp_ctrl[attr->index] & SCH5636_TEMP_ALARM) ? 1 : 0;
243 	return snprintf(buf, PAGE_SIZE, "%d\n", val);
244 }
245 
246 static ssize_t show_fan_value(struct device *dev, struct device_attribute
247 	*devattr, char *buf)
248 {
249 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
250 	struct sch5636_data *data = sch5636_update_device(dev);
251 	int val;
252 
253 	if (IS_ERR(data))
254 		return PTR_ERR(data);
255 
256 	val = reg_to_rpm(data->fan_val[attr->index]);
257 	if (val < 0)
258 		return val;
259 
260 	return snprintf(buf, PAGE_SIZE, "%d\n", val);
261 }
262 
263 static ssize_t show_fan_fault(struct device *dev, struct device_attribute
264 	*devattr, char *buf)
265 {
266 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
267 	struct sch5636_data *data = sch5636_update_device(dev);
268 	int val;
269 
270 	if (IS_ERR(data))
271 		return PTR_ERR(data);
272 
273 	val = (data->fan_ctrl[attr->index] & SCH5636_FAN_NOT_PRESENT) ? 1 : 0;
274 	return snprintf(buf, PAGE_SIZE, "%d\n", val);
275 }
276 
277 static ssize_t show_fan_alarm(struct device *dev, struct device_attribute
278 	*devattr, char *buf)
279 {
280 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
281 	struct sch5636_data *data = sch5636_update_device(dev);
282 	int val;
283 
284 	if (IS_ERR(data))
285 		return PTR_ERR(data);
286 
287 	val = (data->fan_ctrl[attr->index] & SCH5636_FAN_ALARM) ? 1 : 0;
288 	return snprintf(buf, PAGE_SIZE, "%d\n", val);
289 }
290 
291 static struct sensor_device_attribute sch5636_attr[] = {
292 	SENSOR_ATTR(name, 0444, show_name, NULL, 0),
293 	SENSOR_ATTR(in0_input, 0444, show_in_value, NULL, 0),
294 	SENSOR_ATTR(in0_label, 0444, show_in_label, NULL, 0),
295 	SENSOR_ATTR(in1_input, 0444, show_in_value, NULL, 1),
296 	SENSOR_ATTR(in1_label, 0444, show_in_label, NULL, 1),
297 	SENSOR_ATTR(in2_input, 0444, show_in_value, NULL, 2),
298 	SENSOR_ATTR(in2_label, 0444, show_in_label, NULL, 2),
299 	SENSOR_ATTR(in3_input, 0444, show_in_value, NULL, 3),
300 	SENSOR_ATTR(in3_label, 0444, show_in_label, NULL, 3),
301 	SENSOR_ATTR(in4_input, 0444, show_in_value, NULL, 4),
302 	SENSOR_ATTR(in4_label, 0444, show_in_label, NULL, 4),
303 };
304 
305 static struct sensor_device_attribute sch5636_temp_attr[] = {
306 	SENSOR_ATTR(temp1_input, 0444, show_temp_value, NULL, 0),
307 	SENSOR_ATTR(temp1_fault, 0444, show_temp_fault, NULL, 0),
308 	SENSOR_ATTR(temp1_alarm, 0444, show_temp_alarm, NULL, 0),
309 	SENSOR_ATTR(temp2_input, 0444, show_temp_value, NULL, 1),
310 	SENSOR_ATTR(temp2_fault, 0444, show_temp_fault, NULL, 1),
311 	SENSOR_ATTR(temp2_alarm, 0444, show_temp_alarm, NULL, 1),
312 	SENSOR_ATTR(temp3_input, 0444, show_temp_value, NULL, 2),
313 	SENSOR_ATTR(temp3_fault, 0444, show_temp_fault, NULL, 2),
314 	SENSOR_ATTR(temp3_alarm, 0444, show_temp_alarm, NULL, 2),
315 	SENSOR_ATTR(temp4_input, 0444, show_temp_value, NULL, 3),
316 	SENSOR_ATTR(temp4_fault, 0444, show_temp_fault, NULL, 3),
317 	SENSOR_ATTR(temp4_alarm, 0444, show_temp_alarm, NULL, 3),
318 	SENSOR_ATTR(temp5_input, 0444, show_temp_value, NULL, 4),
319 	SENSOR_ATTR(temp5_fault, 0444, show_temp_fault, NULL, 4),
320 	SENSOR_ATTR(temp5_alarm, 0444, show_temp_alarm, NULL, 4),
321 	SENSOR_ATTR(temp6_input, 0444, show_temp_value, NULL, 5),
322 	SENSOR_ATTR(temp6_fault, 0444, show_temp_fault, NULL, 5),
323 	SENSOR_ATTR(temp6_alarm, 0444, show_temp_alarm, NULL, 5),
324 	SENSOR_ATTR(temp7_input, 0444, show_temp_value, NULL, 6),
325 	SENSOR_ATTR(temp7_fault, 0444, show_temp_fault, NULL, 6),
326 	SENSOR_ATTR(temp7_alarm, 0444, show_temp_alarm, NULL, 6),
327 	SENSOR_ATTR(temp8_input, 0444, show_temp_value, NULL, 7),
328 	SENSOR_ATTR(temp8_fault, 0444, show_temp_fault, NULL, 7),
329 	SENSOR_ATTR(temp8_alarm, 0444, show_temp_alarm, NULL, 7),
330 	SENSOR_ATTR(temp9_input, 0444, show_temp_value, NULL, 8),
331 	SENSOR_ATTR(temp9_fault, 0444, show_temp_fault, NULL, 8),
332 	SENSOR_ATTR(temp9_alarm, 0444, show_temp_alarm, NULL, 8),
333 	SENSOR_ATTR(temp10_input, 0444, show_temp_value, NULL, 9),
334 	SENSOR_ATTR(temp10_fault, 0444, show_temp_fault, NULL, 9),
335 	SENSOR_ATTR(temp10_alarm, 0444, show_temp_alarm, NULL, 9),
336 	SENSOR_ATTR(temp11_input, 0444, show_temp_value, NULL, 10),
337 	SENSOR_ATTR(temp11_fault, 0444, show_temp_fault, NULL, 10),
338 	SENSOR_ATTR(temp11_alarm, 0444, show_temp_alarm, NULL, 10),
339 	SENSOR_ATTR(temp12_input, 0444, show_temp_value, NULL, 11),
340 	SENSOR_ATTR(temp12_fault, 0444, show_temp_fault, NULL, 11),
341 	SENSOR_ATTR(temp12_alarm, 0444, show_temp_alarm, NULL, 11),
342 	SENSOR_ATTR(temp13_input, 0444, show_temp_value, NULL, 12),
343 	SENSOR_ATTR(temp13_fault, 0444, show_temp_fault, NULL, 12),
344 	SENSOR_ATTR(temp13_alarm, 0444, show_temp_alarm, NULL, 12),
345 	SENSOR_ATTR(temp14_input, 0444, show_temp_value, NULL, 13),
346 	SENSOR_ATTR(temp14_fault, 0444, show_temp_fault, NULL, 13),
347 	SENSOR_ATTR(temp14_alarm, 0444, show_temp_alarm, NULL, 13),
348 	SENSOR_ATTR(temp15_input, 0444, show_temp_value, NULL, 14),
349 	SENSOR_ATTR(temp15_fault, 0444, show_temp_fault, NULL, 14),
350 	SENSOR_ATTR(temp15_alarm, 0444, show_temp_alarm, NULL, 14),
351 	SENSOR_ATTR(temp16_input, 0444, show_temp_value, NULL, 15),
352 	SENSOR_ATTR(temp16_fault, 0444, show_temp_fault, NULL, 15),
353 	SENSOR_ATTR(temp16_alarm, 0444, show_temp_alarm, NULL, 15),
354 };
355 
356 static struct sensor_device_attribute sch5636_fan_attr[] = {
357 	SENSOR_ATTR(fan1_input, 0444, show_fan_value, NULL, 0),
358 	SENSOR_ATTR(fan1_fault, 0444, show_fan_fault, NULL, 0),
359 	SENSOR_ATTR(fan1_alarm, 0444, show_fan_alarm, NULL, 0),
360 	SENSOR_ATTR(fan2_input, 0444, show_fan_value, NULL, 1),
361 	SENSOR_ATTR(fan2_fault, 0444, show_fan_fault, NULL, 1),
362 	SENSOR_ATTR(fan2_alarm, 0444, show_fan_alarm, NULL, 1),
363 	SENSOR_ATTR(fan3_input, 0444, show_fan_value, NULL, 2),
364 	SENSOR_ATTR(fan3_fault, 0444, show_fan_fault, NULL, 2),
365 	SENSOR_ATTR(fan3_alarm, 0444, show_fan_alarm, NULL, 2),
366 	SENSOR_ATTR(fan4_input, 0444, show_fan_value, NULL, 3),
367 	SENSOR_ATTR(fan4_fault, 0444, show_fan_fault, NULL, 3),
368 	SENSOR_ATTR(fan4_alarm, 0444, show_fan_alarm, NULL, 3),
369 	SENSOR_ATTR(fan5_input, 0444, show_fan_value, NULL, 4),
370 	SENSOR_ATTR(fan5_fault, 0444, show_fan_fault, NULL, 4),
371 	SENSOR_ATTR(fan5_alarm, 0444, show_fan_alarm, NULL, 4),
372 	SENSOR_ATTR(fan6_input, 0444, show_fan_value, NULL, 5),
373 	SENSOR_ATTR(fan6_fault, 0444, show_fan_fault, NULL, 5),
374 	SENSOR_ATTR(fan6_alarm, 0444, show_fan_alarm, NULL, 5),
375 	SENSOR_ATTR(fan7_input, 0444, show_fan_value, NULL, 6),
376 	SENSOR_ATTR(fan7_fault, 0444, show_fan_fault, NULL, 6),
377 	SENSOR_ATTR(fan7_alarm, 0444, show_fan_alarm, NULL, 6),
378 	SENSOR_ATTR(fan8_input, 0444, show_fan_value, NULL, 7),
379 	SENSOR_ATTR(fan8_fault, 0444, show_fan_fault, NULL, 7),
380 	SENSOR_ATTR(fan8_alarm, 0444, show_fan_alarm, NULL, 7),
381 };
382 
383 static int sch5636_remove(struct platform_device *pdev)
384 {
385 	struct sch5636_data *data = platform_get_drvdata(pdev);
386 	int i;
387 
388 	if (data->watchdog)
389 		sch56xx_watchdog_unregister(data->watchdog);
390 
391 	if (data->hwmon_dev)
392 		hwmon_device_unregister(data->hwmon_dev);
393 
394 	for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++)
395 		device_remove_file(&pdev->dev, &sch5636_attr[i].dev_attr);
396 
397 	for (i = 0; i < SCH5636_NO_TEMPS * 3; i++)
398 		device_remove_file(&pdev->dev,
399 				   &sch5636_temp_attr[i].dev_attr);
400 
401 	for (i = 0; i < SCH5636_NO_FANS * 3; i++)
402 		device_remove_file(&pdev->dev,
403 				   &sch5636_fan_attr[i].dev_attr);
404 
405 	return 0;
406 }
407 
408 static int sch5636_probe(struct platform_device *pdev)
409 {
410 	struct sch5636_data *data;
411 	int i, err, val, revision[2];
412 	char id[4];
413 
414 	data = devm_kzalloc(&pdev->dev, sizeof(struct sch5636_data),
415 			    GFP_KERNEL);
416 	if (!data)
417 		return -ENOMEM;
418 
419 	data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
420 	mutex_init(&data->update_lock);
421 	platform_set_drvdata(pdev, data);
422 
423 	for (i = 0; i < 3; i++) {
424 		val = sch56xx_read_virtual_reg(data->addr,
425 					       SCH5636_REG_FUJITSU_ID + i);
426 		if (val < 0) {
427 			pr_err("Could not read Fujitsu id byte at %#x\n",
428 				SCH5636_REG_FUJITSU_ID + i);
429 			err = val;
430 			goto error;
431 		}
432 		id[i] = val;
433 	}
434 	id[i] = '\0';
435 
436 	if (strcmp(id, "THS")) {
437 		pr_err("Unknown Fujitsu id: %02x%02x%02x\n",
438 		       id[0], id[1], id[2]);
439 		err = -ENODEV;
440 		goto error;
441 	}
442 
443 	for (i = 0; i < 2; i++) {
444 		val = sch56xx_read_virtual_reg(data->addr,
445 					       SCH5636_REG_FUJITSU_REV + i);
446 		if (val < 0) {
447 			err = val;
448 			goto error;
449 		}
450 		revision[i] = val;
451 	}
452 	pr_info("Found %s chip at %#hx, revison: %d.%02d\n", DEVNAME,
453 		data->addr, revision[0], revision[1]);
454 
455 	/* Read all temp + fan ctrl registers to determine which are active */
456 	for (i = 0; i < SCH5636_NO_TEMPS; i++) {
457 		val = sch56xx_read_virtual_reg(data->addr,
458 					       SCH5636_REG_TEMP_CTRL(i));
459 		if (unlikely(val < 0)) {
460 			err = val;
461 			goto error;
462 		}
463 		data->temp_ctrl[i] = val;
464 	}
465 
466 	for (i = 0; i < SCH5636_NO_FANS; i++) {
467 		val = sch56xx_read_virtual_reg(data->addr,
468 					       SCH5636_REG_FAN_CTRL(i));
469 		if (unlikely(val < 0)) {
470 			err = val;
471 			goto error;
472 		}
473 		data->fan_ctrl[i] = val;
474 	}
475 
476 	for (i = 0; i < ARRAY_SIZE(sch5636_attr); i++) {
477 		err = device_create_file(&pdev->dev,
478 					 &sch5636_attr[i].dev_attr);
479 		if (err)
480 			goto error;
481 	}
482 
483 	for (i = 0; i < (SCH5636_NO_TEMPS * 3); i++) {
484 		if (data->temp_ctrl[i/3] & SCH5636_TEMP_DEACTIVATED)
485 			continue;
486 
487 		err = device_create_file(&pdev->dev,
488 					&sch5636_temp_attr[i].dev_attr);
489 		if (err)
490 			goto error;
491 	}
492 
493 	for (i = 0; i < (SCH5636_NO_FANS * 3); i++) {
494 		if (data->fan_ctrl[i/3] & SCH5636_FAN_DEACTIVATED)
495 			continue;
496 
497 		err = device_create_file(&pdev->dev,
498 					&sch5636_fan_attr[i].dev_attr);
499 		if (err)
500 			goto error;
501 	}
502 
503 	data->hwmon_dev = hwmon_device_register(&pdev->dev);
504 	if (IS_ERR(data->hwmon_dev)) {
505 		err = PTR_ERR(data->hwmon_dev);
506 		data->hwmon_dev = NULL;
507 		goto error;
508 	}
509 
510 	/* Note failing to register the watchdog is not a fatal error */
511 	data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
512 					(revision[0] << 8) | revision[1],
513 					&data->update_lock, 0);
514 
515 	return 0;
516 
517 error:
518 	sch5636_remove(pdev);
519 	return err;
520 }
521 
522 static struct platform_driver sch5636_driver = {
523 	.driver = {
524 		.owner	= THIS_MODULE,
525 		.name	= DRVNAME,
526 	},
527 	.probe		= sch5636_probe,
528 	.remove		= sch5636_remove,
529 };
530 
531 module_platform_driver(sch5636_driver);
532 
533 MODULE_DESCRIPTION("SMSC SCH5636 Hardware Monitoring Driver");
534 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
535 MODULE_LICENSE("GPL");
536