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sch5627.c
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1 /***************************************************************************
2  * Copyright (C) 2010-2012 Hans de Goede <[email protected]> *
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 "sch5627"
34 #define DEVNAME DRVNAME /* We only support one model */
35 
36 #define SCH5627_HWMON_ID 0xa5
37 #define SCH5627_COMPANY_ID 0x5c
38 #define SCH5627_PRIMARY_ID 0xa0
39 
40 #define SCH5627_REG_BUILD_CODE 0x39
41 #define SCH5627_REG_BUILD_ID 0x3a
42 #define SCH5627_REG_HWMON_ID 0x3c
43 #define SCH5627_REG_HWMON_REV 0x3d
44 #define SCH5627_REG_COMPANY_ID 0x3e
45 #define SCH5627_REG_PRIMARY_ID 0x3f
46 #define SCH5627_REG_CTRL 0x40
47 
48 #define SCH5627_NO_TEMPS 8
49 #define SCH5627_NO_FANS 4
50 #define SCH5627_NO_IN 5
51 
52 static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
53  0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
54 static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
55  0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
56 static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
57  0, 0, 1, 1, 0, 0, 0, 1 };
58 static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
59  0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
60 static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
61  0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
62 
63 static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
64  0x2C, 0x2E, 0x30, 0x32 };
65 static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
66  0x62, 0x64, 0x66, 0x68 };
67 
68 static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
69  0x22, 0x23, 0x24, 0x25, 0x189 };
70 static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
71  0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
72 static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
73  1, 0, 1, 0, 1 };
74 static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
75  10745, 3660, 9765, 10745, 3660 };
76 static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
77  "VCC", "VTT", "VBAT", "VTR", "V_IN" };
78 
79 struct sch5627_data {
80  unsigned short addr;
81  struct device *hwmon_dev;
82  struct sch56xx_watchdog_data *watchdog;
83  u8 control;
84  u8 temp_max[SCH5627_NO_TEMPS];
85  u8 temp_crit[SCH5627_NO_TEMPS];
86  u16 fan_min[SCH5627_NO_FANS];
87 
88  struct mutex update_lock;
89  unsigned long last_battery; /* In jiffies */
90  char valid; /* !=0 if following fields are valid */
91  unsigned long last_updated; /* In jiffies */
92  u16 temp[SCH5627_NO_TEMPS];
93  u16 fan[SCH5627_NO_FANS];
94  u16 in[SCH5627_NO_IN];
95 };
96 
97 static struct sch5627_data *sch5627_update_device(struct device *dev)
98 {
99  struct sch5627_data *data = dev_get_drvdata(dev);
100  struct sch5627_data *ret = data;
101  int i, val;
102 
103  mutex_lock(&data->update_lock);
104 
105  /* Trigger a Vbat voltage measurement every 5 minutes */
106  if (time_after(jiffies, data->last_battery + 300 * HZ)) {
107  sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
108  data->control | 0x10);
109  data->last_battery = jiffies;
110  }
111 
112  /* Cache the values for 1 second */
113  if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
114  for (i = 0; i < SCH5627_NO_TEMPS; i++) {
115  val = sch56xx_read_virtual_reg12(data->addr,
116  SCH5627_REG_TEMP_MSB[i],
117  SCH5627_REG_TEMP_LSN[i],
118  SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
119  if (unlikely(val < 0)) {
120  ret = ERR_PTR(val);
121  goto abort;
122  }
123  data->temp[i] = val;
124  }
125 
126  for (i = 0; i < SCH5627_NO_FANS; i++) {
127  val = sch56xx_read_virtual_reg16(data->addr,
128  SCH5627_REG_FAN[i]);
129  if (unlikely(val < 0)) {
130  ret = ERR_PTR(val);
131  goto abort;
132  }
133  data->fan[i] = val;
134  }
135 
136  for (i = 0; i < SCH5627_NO_IN; i++) {
137  val = sch56xx_read_virtual_reg12(data->addr,
138  SCH5627_REG_IN_MSB[i],
139  SCH5627_REG_IN_LSN[i],
140  SCH5627_REG_IN_HIGH_NIBBLE[i]);
141  if (unlikely(val < 0)) {
142  ret = ERR_PTR(val);
143  goto abort;
144  }
145  data->in[i] = val;
146  }
147 
148  data->last_updated = jiffies;
149  data->valid = 1;
150  }
151 abort:
152  mutex_unlock(&data->update_lock);
153  return ret;
154 }
155 
156 static int __devinit sch5627_read_limits(struct sch5627_data *data)
157 {
158  int i, val;
159 
160  for (i = 0; i < SCH5627_NO_TEMPS; i++) {
161  /*
162  * Note what SMSC calls ABS, is what lm_sensors calls max
163  * (aka high), and HIGH is what lm_sensors calls crit.
164  */
165  val = sch56xx_read_virtual_reg(data->addr,
166  SCH5627_REG_TEMP_ABS[i]);
167  if (val < 0)
168  return val;
169  data->temp_max[i] = val;
170 
171  val = sch56xx_read_virtual_reg(data->addr,
172  SCH5627_REG_TEMP_HIGH[i]);
173  if (val < 0)
174  return val;
175  data->temp_crit[i] = val;
176  }
177  for (i = 0; i < SCH5627_NO_FANS; i++) {
178  val = sch56xx_read_virtual_reg16(data->addr,
179  SCH5627_REG_FAN_MIN[i]);
180  if (val < 0)
181  return val;
182  data->fan_min[i] = val;
183  }
184 
185  return 0;
186 }
187 
188 static int reg_to_temp(u16 reg)
189 {
190  return (reg * 625) / 10 - 64000;
191 }
192 
193 static int reg_to_temp_limit(u8 reg)
194 {
195  return (reg - 64) * 1000;
196 }
197 
198 static int reg_to_rpm(u16 reg)
199 {
200  if (reg == 0)
201  return -EIO;
202  if (reg == 0xffff)
203  return 0;
204 
205  return 5400540 / reg;
206 }
207 
208 static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
209  char *buf)
210 {
211  return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
212 }
213 
214 static ssize_t show_temp(struct device *dev, struct device_attribute
215  *devattr, char *buf)
216 {
217  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
218  struct sch5627_data *data = sch5627_update_device(dev);
219  int val;
220 
221  if (IS_ERR(data))
222  return PTR_ERR(data);
223 
224  val = reg_to_temp(data->temp[attr->index]);
225  return snprintf(buf, PAGE_SIZE, "%d\n", val);
226 }
227 
228 static ssize_t show_temp_fault(struct device *dev, struct device_attribute
229  *devattr, char *buf)
230 {
231  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
232  struct sch5627_data *data = sch5627_update_device(dev);
233 
234  if (IS_ERR(data))
235  return PTR_ERR(data);
236 
237  return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
238 }
239 
240 static ssize_t show_temp_max(struct device *dev, struct device_attribute
241  *devattr, char *buf)
242 {
243  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
244  struct sch5627_data *data = dev_get_drvdata(dev);
245  int val;
246 
247  val = reg_to_temp_limit(data->temp_max[attr->index]);
248  return snprintf(buf, PAGE_SIZE, "%d\n", val);
249 }
250 
251 static ssize_t show_temp_crit(struct device *dev, struct device_attribute
252  *devattr, char *buf)
253 {
254  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
255  struct sch5627_data *data = dev_get_drvdata(dev);
256  int val;
257 
258  val = reg_to_temp_limit(data->temp_crit[attr->index]);
259  return snprintf(buf, PAGE_SIZE, "%d\n", val);
260 }
261 
262 static ssize_t show_fan(struct device *dev, struct device_attribute
263  *devattr, char *buf)
264 {
265  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
266  struct sch5627_data *data = sch5627_update_device(dev);
267  int val;
268 
269  if (IS_ERR(data))
270  return PTR_ERR(data);
271 
272  val = reg_to_rpm(data->fan[attr->index]);
273  if (val < 0)
274  return val;
275 
276  return snprintf(buf, PAGE_SIZE, "%d\n", val);
277 }
278 
279 static ssize_t show_fan_fault(struct device *dev, struct device_attribute
280  *devattr, char *buf)
281 {
282  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
283  struct sch5627_data *data = sch5627_update_device(dev);
284 
285  if (IS_ERR(data))
286  return PTR_ERR(data);
287 
288  return snprintf(buf, PAGE_SIZE, "%d\n",
289  data->fan[attr->index] == 0xffff);
290 }
291 
292 static ssize_t show_fan_min(struct device *dev, struct device_attribute
293  *devattr, char *buf)
294 {
295  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
296  struct sch5627_data *data = dev_get_drvdata(dev);
297  int val = reg_to_rpm(data->fan_min[attr->index]);
298  if (val < 0)
299  return val;
300 
301  return snprintf(buf, PAGE_SIZE, "%d\n", val);
302 }
303 
304 static ssize_t show_in(struct device *dev, struct device_attribute
305  *devattr, char *buf)
306 {
307  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
308  struct sch5627_data *data = sch5627_update_device(dev);
309  int val;
310 
311  if (IS_ERR(data))
312  return PTR_ERR(data);
313 
314  val = DIV_ROUND_CLOSEST(
315  data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
316  10000);
317  return snprintf(buf, PAGE_SIZE, "%d\n", val);
318 }
319 
320 static ssize_t show_in_label(struct device *dev, struct device_attribute
321  *devattr, char *buf)
322 {
323  struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
324 
325  return snprintf(buf, PAGE_SIZE, "%s\n",
326  SCH5627_IN_LABELS[attr->index]);
327 }
328 
329 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
330 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
331 static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
332 static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
333 static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
334 static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
335 static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
336 static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
337 static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
338 static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
339 static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
340 static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
341 static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
342 static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
343 static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
344 static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
345 static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
346 static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
347 static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
348 static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
349 static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
350 static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
351 static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
352 static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
353 static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
354 static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
355 static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
356 static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
357 static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
358 static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
359 static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
360 static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
361 static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
362 
363 static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
364 static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
365 static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
366 static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
367 static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
368 static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
369 static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
370 static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
371 static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
372 static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
373 static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
374 static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
375 
376 static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
377 static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
378 static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
379 static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
380 static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
381 static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
382 static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
383 static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
384 static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
385 
386 static struct attribute *sch5627_attributes[] = {
387  &dev_attr_name.attr,
388 
389  &sensor_dev_attr_temp1_input.dev_attr.attr,
390  &sensor_dev_attr_temp2_input.dev_attr.attr,
391  &sensor_dev_attr_temp3_input.dev_attr.attr,
392  &sensor_dev_attr_temp4_input.dev_attr.attr,
393  &sensor_dev_attr_temp5_input.dev_attr.attr,
394  &sensor_dev_attr_temp6_input.dev_attr.attr,
395  &sensor_dev_attr_temp7_input.dev_attr.attr,
396  &sensor_dev_attr_temp8_input.dev_attr.attr,
397  &sensor_dev_attr_temp1_fault.dev_attr.attr,
398  &sensor_dev_attr_temp2_fault.dev_attr.attr,
399  &sensor_dev_attr_temp3_fault.dev_attr.attr,
400  &sensor_dev_attr_temp4_fault.dev_attr.attr,
401  &sensor_dev_attr_temp5_fault.dev_attr.attr,
402  &sensor_dev_attr_temp6_fault.dev_attr.attr,
403  &sensor_dev_attr_temp7_fault.dev_attr.attr,
404  &sensor_dev_attr_temp8_fault.dev_attr.attr,
405  &sensor_dev_attr_temp1_max.dev_attr.attr,
406  &sensor_dev_attr_temp2_max.dev_attr.attr,
407  &sensor_dev_attr_temp3_max.dev_attr.attr,
408  &sensor_dev_attr_temp4_max.dev_attr.attr,
409  &sensor_dev_attr_temp5_max.dev_attr.attr,
410  &sensor_dev_attr_temp6_max.dev_attr.attr,
411  &sensor_dev_attr_temp7_max.dev_attr.attr,
412  &sensor_dev_attr_temp8_max.dev_attr.attr,
413  &sensor_dev_attr_temp1_crit.dev_attr.attr,
414  &sensor_dev_attr_temp2_crit.dev_attr.attr,
415  &sensor_dev_attr_temp3_crit.dev_attr.attr,
416  &sensor_dev_attr_temp4_crit.dev_attr.attr,
417  &sensor_dev_attr_temp5_crit.dev_attr.attr,
418  &sensor_dev_attr_temp6_crit.dev_attr.attr,
419  &sensor_dev_attr_temp7_crit.dev_attr.attr,
420  &sensor_dev_attr_temp8_crit.dev_attr.attr,
421 
422  &sensor_dev_attr_fan1_input.dev_attr.attr,
423  &sensor_dev_attr_fan2_input.dev_attr.attr,
424  &sensor_dev_attr_fan3_input.dev_attr.attr,
425  &sensor_dev_attr_fan4_input.dev_attr.attr,
426  &sensor_dev_attr_fan1_fault.dev_attr.attr,
427  &sensor_dev_attr_fan2_fault.dev_attr.attr,
428  &sensor_dev_attr_fan3_fault.dev_attr.attr,
429  &sensor_dev_attr_fan4_fault.dev_attr.attr,
430  &sensor_dev_attr_fan1_min.dev_attr.attr,
431  &sensor_dev_attr_fan2_min.dev_attr.attr,
432  &sensor_dev_attr_fan3_min.dev_attr.attr,
433  &sensor_dev_attr_fan4_min.dev_attr.attr,
434 
435  &sensor_dev_attr_in0_input.dev_attr.attr,
436  &sensor_dev_attr_in1_input.dev_attr.attr,
437  &sensor_dev_attr_in2_input.dev_attr.attr,
438  &sensor_dev_attr_in3_input.dev_attr.attr,
439  &sensor_dev_attr_in4_input.dev_attr.attr,
440  &sensor_dev_attr_in0_label.dev_attr.attr,
441  &sensor_dev_attr_in1_label.dev_attr.attr,
442  &sensor_dev_attr_in2_label.dev_attr.attr,
443  &sensor_dev_attr_in3_label.dev_attr.attr,
444  /* No in4_label as in4 is a generic input pin */
445 
446  NULL
447 };
448 
449 static const struct attribute_group sch5627_group = {
450  .attrs = sch5627_attributes,
451 };
452 
453 static int sch5627_remove(struct platform_device *pdev)
454 {
455  struct sch5627_data *data = platform_get_drvdata(pdev);
456 
457  if (data->watchdog)
458  sch56xx_watchdog_unregister(data->watchdog);
459 
460  if (data->hwmon_dev)
461  hwmon_device_unregister(data->hwmon_dev);
462 
463  sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
464 
465  return 0;
466 }
467 
468 static int __devinit sch5627_probe(struct platform_device *pdev)
469 {
470  struct sch5627_data *data;
471  int err, build_code, build_id, hwmon_rev, val;
472 
473  data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
474  GFP_KERNEL);
475  if (!data)
476  return -ENOMEM;
477 
478  data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
479  mutex_init(&data->update_lock);
480  platform_set_drvdata(pdev, data);
481 
482  val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
483  if (val < 0) {
484  err = val;
485  goto error;
486  }
487  if (val != SCH5627_HWMON_ID) {
488  pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
489  val, SCH5627_HWMON_ID);
490  err = -ENODEV;
491  goto error;
492  }
493 
494  val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
495  if (val < 0) {
496  err = val;
497  goto error;
498  }
499  if (val != SCH5627_COMPANY_ID) {
500  pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
501  val, SCH5627_COMPANY_ID);
502  err = -ENODEV;
503  goto error;
504  }
505 
506  val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
507  if (val < 0) {
508  err = val;
509  goto error;
510  }
511  if (val != SCH5627_PRIMARY_ID) {
512  pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
513  val, SCH5627_PRIMARY_ID);
514  err = -ENODEV;
515  goto error;
516  }
517 
518  build_code = sch56xx_read_virtual_reg(data->addr,
519  SCH5627_REG_BUILD_CODE);
520  if (build_code < 0) {
521  err = build_code;
522  goto error;
523  }
524 
525  build_id = sch56xx_read_virtual_reg16(data->addr,
526  SCH5627_REG_BUILD_ID);
527  if (build_id < 0) {
528  err = build_id;
529  goto error;
530  }
531 
532  hwmon_rev = sch56xx_read_virtual_reg(data->addr,
533  SCH5627_REG_HWMON_REV);
534  if (hwmon_rev < 0) {
535  err = hwmon_rev;
536  goto error;
537  }
538 
539  val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
540  if (val < 0) {
541  err = val;
542  goto error;
543  }
544  data->control = val;
545  if (!(data->control & 0x01)) {
546  pr_err("hardware monitoring not enabled\n");
547  err = -ENODEV;
548  goto error;
549  }
550  /* Trigger a Vbat voltage measurement, so that we get a valid reading
551  the first time we read Vbat */
552  sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
553  data->control | 0x10);
554  data->last_battery = jiffies;
555 
556  /*
557  * Read limits, we do this only once as reading a register on
558  * the sch5627 is quite expensive (and they don't change).
559  */
560  err = sch5627_read_limits(data);
561  if (err)
562  goto error;
563 
564  pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
565  pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
566  build_code, build_id, hwmon_rev);
567 
568  /* Register sysfs interface files */
569  err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
570  if (err)
571  goto error;
572 
573  data->hwmon_dev = hwmon_device_register(&pdev->dev);
574  if (IS_ERR(data->hwmon_dev)) {
575  err = PTR_ERR(data->hwmon_dev);
576  data->hwmon_dev = NULL;
577  goto error;
578  }
579 
580  /* Note failing to register the watchdog is not a fatal error */
581  data->watchdog = sch56xx_watchdog_register(&pdev->dev, data->addr,
582  (build_code << 24) | (build_id << 8) | hwmon_rev,
583  &data->update_lock, 1);
584 
585  return 0;
586 
587 error:
588  sch5627_remove(pdev);
589  return err;
590 }
591 
592 static struct platform_driver sch5627_driver = {
593  .driver = {
594  .owner = THIS_MODULE,
595  .name = DRVNAME,
596  },
597  .probe = sch5627_probe,
598  .remove = sch5627_remove,
599 };
600 
601 module_platform_driver(sch5627_driver);
602 
603 MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
604 MODULE_AUTHOR("Hans de Goede <[email protected]>");
605 MODULE_LICENSE("GPL");
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