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1 | /* | |
2 | * adm1025.c | |
3 | * | |
4 | * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> | |
5 | * Copyright (C) 2003-2009 Jean Delvare <jdelvare@suse.de> | |
6 | * | |
7 | * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6 | |
8 | * voltages (including its own power source) and up to two temperatures | |
9 | * (its own plus up to one external one). Voltages are scaled internally | |
10 | * (which is not the common way) with ratios such that the nominal value | |
11 | * of each voltage correspond to a register value of 192 (which means a | |
12 | * resolution of about 0.5% of the nominal value). Temperature values are | |
13 | * reported with a 1 deg resolution and a 3 deg accuracy. Complete | |
14 | * datasheet can be obtained from Analog's website at: | |
15 | * http://www.onsemi.com/PowerSolutions/product.do?id=ADM1025 | |
16 | * | |
17 | * This driver also supports the ADM1025A, which differs from the ADM1025 | |
18 | * only in that it has "open-drain VID inputs while the ADM1025 has | |
19 | * on-chip 100k pull-ups on the VID inputs". It doesn't make any | |
20 | * difference for us. | |
21 | * | |
22 | * This driver also supports the NE1619, a sensor chip made by Philips. | |
23 | * That chip is similar to the ADM1025A, with a few differences. The only | |
24 | * difference that matters to us is that the NE1619 has only two possible | |
25 | * addresses while the ADM1025A has a third one. Complete datasheet can be | |
26 | * obtained from Philips's website at: | |
27 | * http://www.semiconductors.philips.com/pip/NE1619DS.html | |
28 | * | |
29 | * Since the ADM1025 was the first chipset supported by this driver, most | |
30 | * comments will refer to this chipset, but are actually general and | |
31 | * concern all supported chipsets, unless mentioned otherwise. | |
32 | * | |
33 | * This program is free software; you can redistribute it and/or modify | |
34 | * it under the terms of the GNU General Public License as published by | |
35 | * the Free Software Foundation; either version 2 of the License, or | |
36 | * (at your option) any later version. | |
37 | * | |
38 | * This program is distributed in the hope that it will be useful, | |
39 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
40 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
41 | * GNU General Public License for more details. | |
42 | * | |
43 | * You should have received a copy of the GNU General Public License | |
44 | * along with this program; if not, write to the Free Software | |
45 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
46 | */ | |
47 | ||
48 | #include <linux/module.h> | |
49 | #include <linux/init.h> | |
50 | #include <linux/slab.h> | |
51 | #include <linux/jiffies.h> | |
52 | #include <linux/i2c.h> | |
53 | #include <linux/hwmon.h> | |
54 | #include <linux/hwmon-sysfs.h> | |
55 | #include <linux/hwmon-vid.h> | |
56 | #include <linux/err.h> | |
57 | #include <linux/mutex.h> | |
58 | ||
59 | /* | |
60 | * Addresses to scan | |
61 | * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e. | |
62 | * NE1619 has two possible addresses: 0x2c and 0x2d. | |
63 | */ | |
64 | ||
65 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; | |
66 | ||
67 | enum chips { adm1025, ne1619 }; | |
68 | ||
69 | /* | |
70 | * The ADM1025 registers | |
71 | */ | |
72 | ||
73 | #define ADM1025_REG_MAN_ID 0x3E | |
74 | #define ADM1025_REG_CHIP_ID 0x3F | |
75 | #define ADM1025_REG_CONFIG 0x40 | |
76 | #define ADM1025_REG_STATUS1 0x41 | |
77 | #define ADM1025_REG_STATUS2 0x42 | |
78 | #define ADM1025_REG_IN(nr) (0x20 + (nr)) | |
79 | #define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) | |
80 | #define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) | |
81 | #define ADM1025_REG_TEMP(nr) (0x26 + (nr)) | |
82 | #define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) | |
83 | #define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) | |
84 | #define ADM1025_REG_VID 0x47 | |
85 | #define ADM1025_REG_VID4 0x49 | |
86 | ||
87 | /* | |
88 | * Conversions and various macros | |
89 | * The ADM1025 uses signed 8-bit values for temperatures. | |
90 | */ | |
91 | ||
92 | static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; | |
93 | ||
94 | #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192) | |
95 | #define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \ | |
96 | (val) >= (scale) * 255 / 192 ? 255 : \ | |
97 | ((val) * 192 + (scale) / 2) / (scale)) | |
98 | ||
99 | #define TEMP_FROM_REG(reg) ((reg) * 1000) | |
100 | #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ | |
101 | (val) >= 126500 ? 127 : \ | |
102 | (((val) < 0 ? (val) - 500 : \ | |
103 | (val) + 500) / 1000)) | |
104 | ||
105 | /* | |
106 | * Client data (each client gets its own) | |
107 | */ | |
108 | ||
109 | struct adm1025_data { | |
110 | struct i2c_client *client; | |
111 | const struct attribute_group *groups[3]; | |
112 | struct mutex update_lock; | |
113 | char valid; /* zero until following fields are valid */ | |
114 | unsigned long last_updated; /* in jiffies */ | |
115 | ||
116 | u8 in[6]; /* register value */ | |
117 | u8 in_max[6]; /* register value */ | |
118 | u8 in_min[6]; /* register value */ | |
119 | s8 temp[2]; /* register value */ | |
120 | s8 temp_min[2]; /* register value */ | |
121 | s8 temp_max[2]; /* register value */ | |
122 | u16 alarms; /* register values, combined */ | |
123 | u8 vid; /* register values, combined */ | |
124 | u8 vrm; | |
125 | }; | |
126 | ||
127 | static struct adm1025_data *adm1025_update_device(struct device *dev) | |
128 | { | |
129 | struct adm1025_data *data = dev_get_drvdata(dev); | |
130 | struct i2c_client *client = data->client; | |
131 | ||
132 | mutex_lock(&data->update_lock); | |
133 | ||
134 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { | |
135 | int i; | |
136 | ||
137 | dev_dbg(&client->dev, "Updating data.\n"); | |
138 | for (i = 0; i < 6; i++) { | |
139 | data->in[i] = i2c_smbus_read_byte_data(client, | |
140 | ADM1025_REG_IN(i)); | |
141 | data->in_min[i] = i2c_smbus_read_byte_data(client, | |
142 | ADM1025_REG_IN_MIN(i)); | |
143 | data->in_max[i] = i2c_smbus_read_byte_data(client, | |
144 | ADM1025_REG_IN_MAX(i)); | |
145 | } | |
146 | for (i = 0; i < 2; i++) { | |
147 | data->temp[i] = i2c_smbus_read_byte_data(client, | |
148 | ADM1025_REG_TEMP(i)); | |
149 | data->temp_min[i] = i2c_smbus_read_byte_data(client, | |
150 | ADM1025_REG_TEMP_LOW(i)); | |
151 | data->temp_max[i] = i2c_smbus_read_byte_data(client, | |
152 | ADM1025_REG_TEMP_HIGH(i)); | |
153 | } | |
154 | data->alarms = i2c_smbus_read_byte_data(client, | |
155 | ADM1025_REG_STATUS1) | |
156 | | (i2c_smbus_read_byte_data(client, | |
157 | ADM1025_REG_STATUS2) << 8); | |
158 | data->vid = (i2c_smbus_read_byte_data(client, | |
159 | ADM1025_REG_VID) & 0x0f) | |
160 | | ((i2c_smbus_read_byte_data(client, | |
161 | ADM1025_REG_VID4) & 0x01) << 4); | |
162 | ||
163 | data->last_updated = jiffies; | |
164 | data->valid = 1; | |
165 | } | |
166 | ||
167 | mutex_unlock(&data->update_lock); | |
168 | ||
169 | return data; | |
170 | } | |
171 | ||
172 | /* | |
173 | * Sysfs stuff | |
174 | */ | |
175 | ||
176 | static ssize_t | |
177 | show_in(struct device *dev, struct device_attribute *attr, char *buf) | |
178 | { | |
179 | int index = to_sensor_dev_attr(attr)->index; | |
180 | struct adm1025_data *data = adm1025_update_device(dev); | |
181 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index], | |
182 | in_scale[index])); | |
183 | } | |
184 | ||
185 | static ssize_t | |
186 | show_in_min(struct device *dev, struct device_attribute *attr, char *buf) | |
187 | { | |
188 | int index = to_sensor_dev_attr(attr)->index; | |
189 | struct adm1025_data *data = adm1025_update_device(dev); | |
190 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index], | |
191 | in_scale[index])); | |
192 | } | |
193 | ||
194 | static ssize_t | |
195 | show_in_max(struct device *dev, struct device_attribute *attr, char *buf) | |
196 | { | |
197 | int index = to_sensor_dev_attr(attr)->index; | |
198 | struct adm1025_data *data = adm1025_update_device(dev); | |
199 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index], | |
200 | in_scale[index])); | |
201 | } | |
202 | ||
203 | static ssize_t | |
204 | show_temp(struct device *dev, struct device_attribute *attr, char *buf) | |
205 | { | |
206 | int index = to_sensor_dev_attr(attr)->index; | |
207 | struct adm1025_data *data = adm1025_update_device(dev); | |
208 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); | |
209 | } | |
210 | ||
211 | static ssize_t | |
212 | show_temp_min(struct device *dev, struct device_attribute *attr, char *buf) | |
213 | { | |
214 | int index = to_sensor_dev_attr(attr)->index; | |
215 | struct adm1025_data *data = adm1025_update_device(dev); | |
216 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index])); | |
217 | } | |
218 | ||
219 | static ssize_t | |
220 | show_temp_max(struct device *dev, struct device_attribute *attr, char *buf) | |
221 | { | |
222 | int index = to_sensor_dev_attr(attr)->index; | |
223 | struct adm1025_data *data = adm1025_update_device(dev); | |
224 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index])); | |
225 | } | |
226 | ||
227 | static ssize_t set_in_min(struct device *dev, struct device_attribute *attr, | |
228 | const char *buf, size_t count) | |
229 | { | |
230 | int index = to_sensor_dev_attr(attr)->index; | |
231 | struct adm1025_data *data = dev_get_drvdata(dev); | |
232 | struct i2c_client *client = data->client; | |
233 | long val; | |
234 | int err; | |
235 | ||
236 | err = kstrtol(buf, 10, &val); | |
237 | if (err) | |
238 | return err; | |
239 | ||
240 | mutex_lock(&data->update_lock); | |
241 | data->in_min[index] = IN_TO_REG(val, in_scale[index]); | |
242 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), | |
243 | data->in_min[index]); | |
244 | mutex_unlock(&data->update_lock); | |
245 | return count; | |
246 | } | |
247 | ||
248 | static ssize_t set_in_max(struct device *dev, struct device_attribute *attr, | |
249 | const char *buf, size_t count) | |
250 | { | |
251 | int index = to_sensor_dev_attr(attr)->index; | |
252 | struct adm1025_data *data = dev_get_drvdata(dev); | |
253 | struct i2c_client *client = data->client; | |
254 | long val; | |
255 | int err; | |
256 | ||
257 | err = kstrtol(buf, 10, &val); | |
258 | if (err) | |
259 | return err; | |
260 | ||
261 | mutex_lock(&data->update_lock); | |
262 | data->in_max[index] = IN_TO_REG(val, in_scale[index]); | |
263 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), | |
264 | data->in_max[index]); | |
265 | mutex_unlock(&data->update_lock); | |
266 | return count; | |
267 | } | |
268 | ||
269 | #define set_in(offset) \ | |
270 | static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \ | |
271 | show_in, NULL, offset); \ | |
272 | static SENSOR_DEVICE_ATTR(in##offset##_min, S_IWUSR | S_IRUGO, \ | |
273 | show_in_min, set_in_min, offset); \ | |
274 | static SENSOR_DEVICE_ATTR(in##offset##_max, S_IWUSR | S_IRUGO, \ | |
275 | show_in_max, set_in_max, offset) | |
276 | set_in(0); | |
277 | set_in(1); | |
278 | set_in(2); | |
279 | set_in(3); | |
280 | set_in(4); | |
281 | set_in(5); | |
282 | ||
283 | static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr, | |
284 | const char *buf, size_t count) | |
285 | { | |
286 | int index = to_sensor_dev_attr(attr)->index; | |
287 | struct adm1025_data *data = dev_get_drvdata(dev); | |
288 | struct i2c_client *client = data->client; | |
289 | long val; | |
290 | int err; | |
291 | ||
292 | err = kstrtol(buf, 10, &val); | |
293 | if (err) | |
294 | return err; | |
295 | ||
296 | mutex_lock(&data->update_lock); | |
297 | data->temp_min[index] = TEMP_TO_REG(val); | |
298 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), | |
299 | data->temp_min[index]); | |
300 | mutex_unlock(&data->update_lock); | |
301 | return count; | |
302 | } | |
303 | ||
304 | static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr, | |
305 | const char *buf, size_t count) | |
306 | { | |
307 | int index = to_sensor_dev_attr(attr)->index; | |
308 | struct adm1025_data *data = dev_get_drvdata(dev); | |
309 | struct i2c_client *client = data->client; | |
310 | long val; | |
311 | int err; | |
312 | ||
313 | err = kstrtol(buf, 10, &val); | |
314 | if (err) | |
315 | return err; | |
316 | ||
317 | mutex_lock(&data->update_lock); | |
318 | data->temp_max[index] = TEMP_TO_REG(val); | |
319 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), | |
320 | data->temp_max[index]); | |
321 | mutex_unlock(&data->update_lock); | |
322 | return count; | |
323 | } | |
324 | ||
325 | #define set_temp(offset) \ | |
326 | static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \ | |
327 | show_temp, NULL, offset - 1); \ | |
328 | static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IWUSR | S_IRUGO, \ | |
329 | show_temp_min, set_temp_min, offset - 1); \ | |
330 | static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IWUSR | S_IRUGO, \ | |
331 | show_temp_max, set_temp_max, offset - 1) | |
332 | set_temp(1); | |
333 | set_temp(2); | |
334 | ||
335 | static ssize_t | |
336 | alarms_show(struct device *dev, struct device_attribute *attr, char *buf) | |
337 | { | |
338 | struct adm1025_data *data = adm1025_update_device(dev); | |
339 | return sprintf(buf, "%u\n", data->alarms); | |
340 | } | |
341 | static DEVICE_ATTR_RO(alarms); | |
342 | ||
343 | static ssize_t | |
344 | show_alarm(struct device *dev, struct device_attribute *attr, char *buf) | |
345 | { | |
346 | int bitnr = to_sensor_dev_attr(attr)->index; | |
347 | struct adm1025_data *data = adm1025_update_device(dev); | |
348 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
349 | } | |
350 | static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0); | |
351 | static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 1); | |
352 | static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 2); | |
353 | static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 3); | |
354 | static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 8); | |
355 | static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 9); | |
356 | static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 5); | |
357 | static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 4); | |
358 | static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_alarm, NULL, 14); | |
359 | ||
360 | static ssize_t | |
361 | cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) | |
362 | { | |
363 | struct adm1025_data *data = adm1025_update_device(dev); | |
364 | return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); | |
365 | } | |
366 | static DEVICE_ATTR_RO(cpu0_vid); | |
367 | ||
368 | static ssize_t | |
369 | vrm_show(struct device *dev, struct device_attribute *attr, char *buf) | |
370 | { | |
371 | struct adm1025_data *data = dev_get_drvdata(dev); | |
372 | return sprintf(buf, "%u\n", data->vrm); | |
373 | } | |
374 | static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, | |
375 | const char *buf, size_t count) | |
376 | { | |
377 | struct adm1025_data *data = dev_get_drvdata(dev); | |
378 | unsigned long val; | |
379 | int err; | |
380 | ||
381 | err = kstrtoul(buf, 10, &val); | |
382 | if (err) | |
383 | return err; | |
384 | ||
385 | if (val > 255) | |
386 | return -EINVAL; | |
387 | ||
388 | data->vrm = val; | |
389 | return count; | |
390 | } | |
391 | static DEVICE_ATTR_RW(vrm); | |
392 | ||
393 | /* | |
394 | * Real code | |
395 | */ | |
396 | ||
397 | static struct attribute *adm1025_attributes[] = { | |
398 | &sensor_dev_attr_in0_input.dev_attr.attr, | |
399 | &sensor_dev_attr_in1_input.dev_attr.attr, | |
400 | &sensor_dev_attr_in2_input.dev_attr.attr, | |
401 | &sensor_dev_attr_in3_input.dev_attr.attr, | |
402 | &sensor_dev_attr_in5_input.dev_attr.attr, | |
403 | &sensor_dev_attr_in0_min.dev_attr.attr, | |
404 | &sensor_dev_attr_in1_min.dev_attr.attr, | |
405 | &sensor_dev_attr_in2_min.dev_attr.attr, | |
406 | &sensor_dev_attr_in3_min.dev_attr.attr, | |
407 | &sensor_dev_attr_in5_min.dev_attr.attr, | |
408 | &sensor_dev_attr_in0_max.dev_attr.attr, | |
409 | &sensor_dev_attr_in1_max.dev_attr.attr, | |
410 | &sensor_dev_attr_in2_max.dev_attr.attr, | |
411 | &sensor_dev_attr_in3_max.dev_attr.attr, | |
412 | &sensor_dev_attr_in5_max.dev_attr.attr, | |
413 | &sensor_dev_attr_in0_alarm.dev_attr.attr, | |
414 | &sensor_dev_attr_in1_alarm.dev_attr.attr, | |
415 | &sensor_dev_attr_in2_alarm.dev_attr.attr, | |
416 | &sensor_dev_attr_in3_alarm.dev_attr.attr, | |
417 | &sensor_dev_attr_in5_alarm.dev_attr.attr, | |
418 | &sensor_dev_attr_temp1_input.dev_attr.attr, | |
419 | &sensor_dev_attr_temp2_input.dev_attr.attr, | |
420 | &sensor_dev_attr_temp1_min.dev_attr.attr, | |
421 | &sensor_dev_attr_temp2_min.dev_attr.attr, | |
422 | &sensor_dev_attr_temp1_max.dev_attr.attr, | |
423 | &sensor_dev_attr_temp2_max.dev_attr.attr, | |
424 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, | |
425 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, | |
426 | &sensor_dev_attr_temp1_fault.dev_attr.attr, | |
427 | &dev_attr_alarms.attr, | |
428 | &dev_attr_cpu0_vid.attr, | |
429 | &dev_attr_vrm.attr, | |
430 | NULL | |
431 | }; | |
432 | ||
433 | static const struct attribute_group adm1025_group = { | |
434 | .attrs = adm1025_attributes, | |
435 | }; | |
436 | ||
437 | static struct attribute *adm1025_attributes_in4[] = { | |
438 | &sensor_dev_attr_in4_input.dev_attr.attr, | |
439 | &sensor_dev_attr_in4_min.dev_attr.attr, | |
440 | &sensor_dev_attr_in4_max.dev_attr.attr, | |
441 | &sensor_dev_attr_in4_alarm.dev_attr.attr, | |
442 | NULL | |
443 | }; | |
444 | ||
445 | static const struct attribute_group adm1025_group_in4 = { | |
446 | .attrs = adm1025_attributes_in4, | |
447 | }; | |
448 | ||
449 | /* Return 0 if detection is successful, -ENODEV otherwise */ | |
450 | static int adm1025_detect(struct i2c_client *client, | |
451 | struct i2c_board_info *info) | |
452 | { | |
453 | struct i2c_adapter *adapter = client->adapter; | |
454 | const char *name; | |
455 | u8 man_id, chip_id; | |
456 | ||
457 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
458 | return -ENODEV; | |
459 | ||
460 | /* Check for unused bits */ | |
461 | if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80) | |
462 | || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0) | |
463 | || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) { | |
464 | dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n", | |
465 | client->addr); | |
466 | return -ENODEV; | |
467 | } | |
468 | ||
469 | /* Identification */ | |
470 | chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); | |
471 | if ((chip_id & 0xF0) != 0x20) | |
472 | return -ENODEV; | |
473 | ||
474 | man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); | |
475 | if (man_id == 0x41) | |
476 | name = "adm1025"; | |
477 | else if (man_id == 0xA1 && client->addr != 0x2E) | |
478 | name = "ne1619"; | |
479 | else | |
480 | return -ENODEV; | |
481 | ||
482 | strlcpy(info->type, name, I2C_NAME_SIZE); | |
483 | ||
484 | return 0; | |
485 | } | |
486 | ||
487 | static void adm1025_init_client(struct i2c_client *client) | |
488 | { | |
489 | u8 reg; | |
490 | struct adm1025_data *data = i2c_get_clientdata(client); | |
491 | int i; | |
492 | ||
493 | data->vrm = vid_which_vrm(); | |
494 | ||
495 | /* | |
496 | * Set high limits | |
497 | * Usually we avoid setting limits on driver init, but it happens | |
498 | * that the ADM1025 comes with stupid default limits (all registers | |
499 | * set to 0). In case the chip has not gone through any limit | |
500 | * setting yet, we better set the high limits to the max so that | |
501 | * no alarm triggers. | |
502 | */ | |
503 | for (i = 0; i < 6; i++) { | |
504 | reg = i2c_smbus_read_byte_data(client, | |
505 | ADM1025_REG_IN_MAX(i)); | |
506 | if (reg == 0) | |
507 | i2c_smbus_write_byte_data(client, | |
508 | ADM1025_REG_IN_MAX(i), | |
509 | 0xFF); | |
510 | } | |
511 | for (i = 0; i < 2; i++) { | |
512 | reg = i2c_smbus_read_byte_data(client, | |
513 | ADM1025_REG_TEMP_HIGH(i)); | |
514 | if (reg == 0) | |
515 | i2c_smbus_write_byte_data(client, | |
516 | ADM1025_REG_TEMP_HIGH(i), | |
517 | 0x7F); | |
518 | } | |
519 | ||
520 | /* | |
521 | * Start the conversions | |
522 | */ | |
523 | reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); | |
524 | if (!(reg & 0x01)) | |
525 | i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, | |
526 | (reg&0x7E)|0x01); | |
527 | } | |
528 | ||
529 | static int adm1025_probe(struct i2c_client *client, | |
530 | const struct i2c_device_id *id) | |
531 | { | |
532 | struct device *dev = &client->dev; | |
533 | struct device *hwmon_dev; | |
534 | struct adm1025_data *data; | |
535 | u8 config; | |
536 | ||
537 | data = devm_kzalloc(dev, sizeof(struct adm1025_data), GFP_KERNEL); | |
538 | if (!data) | |
539 | return -ENOMEM; | |
540 | ||
541 | i2c_set_clientdata(client, data); | |
542 | data->client = client; | |
543 | mutex_init(&data->update_lock); | |
544 | ||
545 | /* Initialize the ADM1025 chip */ | |
546 | adm1025_init_client(client); | |
547 | ||
548 | /* sysfs hooks */ | |
549 | data->groups[0] = &adm1025_group; | |
550 | /* Pin 11 is either in4 (+12V) or VID4 */ | |
551 | config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); | |
552 | if (!(config & 0x20)) | |
553 | data->groups[1] = &adm1025_group_in4; | |
554 | ||
555 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, | |
556 | data, data->groups); | |
557 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
558 | } | |
559 | ||
560 | static const struct i2c_device_id adm1025_id[] = { | |
561 | { "adm1025", adm1025 }, | |
562 | { "ne1619", ne1619 }, | |
563 | { } | |
564 | }; | |
565 | MODULE_DEVICE_TABLE(i2c, adm1025_id); | |
566 | ||
567 | static struct i2c_driver adm1025_driver = { | |
568 | .class = I2C_CLASS_HWMON, | |
569 | .driver = { | |
570 | .name = "adm1025", | |
571 | }, | |
572 | .probe = adm1025_probe, | |
573 | .id_table = adm1025_id, | |
574 | .detect = adm1025_detect, | |
575 | .address_list = normal_i2c, | |
576 | }; | |
577 | ||
578 | module_i2c_driver(adm1025_driver); | |
579 | ||
580 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); | |
581 | MODULE_DESCRIPTION("ADM1025 driver"); | |
582 | MODULE_LICENSE("GPL"); |