1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * adm1025.c |
4 | * |
5 | * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> |
6 | * Copyright (C) 2003-2009 Jean Delvare <jdelvare@suse.de> |
7 | * |
8 | * The ADM1025 is a sensor chip made by Analog Devices. It reports up to 6 |
9 | * voltages (including its own power source) and up to two temperatures |
10 | * (its own plus up to one external one). Voltages are scaled internally |
11 | * (which is not the common way) with ratios such that the nominal value |
12 | * of each voltage correspond to a register value of 192 (which means a |
13 | * resolution of about 0.5% of the nominal value). Temperature values are |
14 | * reported with a 1 deg resolution and a 3 deg accuracy. Complete |
15 | * datasheet can be obtained from Analog's website at: |
16 | * https://www.onsemi.com/PowerSolutions/product.do?id=ADM1025 |
17 | * |
18 | * This driver also supports the ADM1025A, which differs from the ADM1025 |
19 | * only in that it has "open-drain VID inputs while the ADM1025 has |
20 | * on-chip 100k pull-ups on the VID inputs". It doesn't make any |
21 | * difference for us. |
22 | * |
23 | * This driver also supports the NE1619, a sensor chip made by Philips. |
24 | * That chip is similar to the ADM1025A, with a few differences. The only |
25 | * difference that matters to us is that the NE1619 has only two possible |
26 | * addresses while the ADM1025A has a third one. Complete datasheet can be |
27 | * obtained from Philips's website at: |
28 | * http://www.semiconductors.philips.com/pip/NE1619DS.html |
29 | * |
30 | * Since the ADM1025 was the first chipset supported by this driver, most |
31 | * comments will refer to this chipset, but are actually general and |
32 | * concern all supported chipsets, unless mentioned otherwise. |
33 | */ |
34 | |
35 | #include <linux/module.h> |
36 | #include <linux/init.h> |
37 | #include <linux/slab.h> |
38 | #include <linux/jiffies.h> |
39 | #include <linux/i2c.h> |
40 | #include <linux/hwmon.h> |
41 | #include <linux/hwmon-sysfs.h> |
42 | #include <linux/hwmon-vid.h> |
43 | #include <linux/err.h> |
44 | #include <linux/mutex.h> |
45 | |
46 | /* |
47 | * Addresses to scan |
48 | * ADM1025 and ADM1025A have three possible addresses: 0x2c, 0x2d and 0x2e. |
49 | * NE1619 has two possible addresses: 0x2c and 0x2d. |
50 | */ |
51 | |
52 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
53 | |
54 | enum chips { adm1025, ne1619 }; |
55 | |
56 | /* |
57 | * The ADM1025 registers |
58 | */ |
59 | |
60 | #define ADM1025_REG_MAN_ID 0x3E |
61 | #define ADM1025_REG_CHIP_ID 0x3F |
62 | #define ADM1025_REG_CONFIG 0x40 |
63 | #define ADM1025_REG_STATUS1 0x41 |
64 | #define ADM1025_REG_STATUS2 0x42 |
65 | #define ADM1025_REG_IN(nr) (0x20 + (nr)) |
66 | #define ADM1025_REG_IN_MAX(nr) (0x2B + (nr) * 2) |
67 | #define ADM1025_REG_IN_MIN(nr) (0x2C + (nr) * 2) |
68 | #define ADM1025_REG_TEMP(nr) (0x26 + (nr)) |
69 | #define ADM1025_REG_TEMP_HIGH(nr) (0x37 + (nr) * 2) |
70 | #define ADM1025_REG_TEMP_LOW(nr) (0x38 + (nr) * 2) |
71 | #define ADM1025_REG_VID 0x47 |
72 | #define ADM1025_REG_VID4 0x49 |
73 | |
74 | /* |
75 | * Conversions and various macros |
76 | * The ADM1025 uses signed 8-bit values for temperatures. |
77 | */ |
78 | |
79 | static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; |
80 | |
81 | #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192) |
82 | #define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \ |
83 | (val) >= (scale) * 255 / 192 ? 255 : \ |
84 | ((val) * 192 + (scale) / 2) / (scale)) |
85 | |
86 | #define TEMP_FROM_REG(reg) ((reg) * 1000) |
87 | #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ |
88 | (val) >= 126500 ? 127 : \ |
89 | (((val) < 0 ? (val) - 500 : \ |
90 | (val) + 500) / 1000)) |
91 | |
92 | /* |
93 | * Client data (each client gets its own) |
94 | */ |
95 | |
96 | struct adm1025_data { |
97 | struct i2c_client *client; |
98 | const struct attribute_group *groups[3]; |
99 | struct mutex update_lock; |
100 | bool valid; /* false until following fields are valid */ |
101 | unsigned long last_updated; /* in jiffies */ |
102 | |
103 | u8 in[6]; /* register value */ |
104 | u8 in_max[6]; /* register value */ |
105 | u8 in_min[6]; /* register value */ |
106 | s8 temp[2]; /* register value */ |
107 | s8 temp_min[2]; /* register value */ |
108 | s8 temp_max[2]; /* register value */ |
109 | u16 alarms; /* register values, combined */ |
110 | u8 vid; /* register values, combined */ |
111 | u8 vrm; |
112 | }; |
113 | |
114 | static struct adm1025_data *adm1025_update_device(struct device *dev) |
115 | { |
116 | struct adm1025_data *data = dev_get_drvdata(dev); |
117 | struct i2c_client *client = data->client; |
118 | |
119 | mutex_lock(&data->update_lock); |
120 | |
121 | if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { |
122 | int i; |
123 | |
124 | dev_dbg(&client->dev, "Updating data.\n" ); |
125 | for (i = 0; i < 6; i++) { |
126 | data->in[i] = i2c_smbus_read_byte_data(client, |
127 | ADM1025_REG_IN(i)); |
128 | data->in_min[i] = i2c_smbus_read_byte_data(client, |
129 | ADM1025_REG_IN_MIN(i)); |
130 | data->in_max[i] = i2c_smbus_read_byte_data(client, |
131 | ADM1025_REG_IN_MAX(i)); |
132 | } |
133 | for (i = 0; i < 2; i++) { |
134 | data->temp[i] = i2c_smbus_read_byte_data(client, |
135 | ADM1025_REG_TEMP(i)); |
136 | data->temp_min[i] = i2c_smbus_read_byte_data(client, |
137 | ADM1025_REG_TEMP_LOW(i)); |
138 | data->temp_max[i] = i2c_smbus_read_byte_data(client, |
139 | ADM1025_REG_TEMP_HIGH(i)); |
140 | } |
141 | data->alarms = i2c_smbus_read_byte_data(client, |
142 | ADM1025_REG_STATUS1) |
143 | | (i2c_smbus_read_byte_data(client, |
144 | ADM1025_REG_STATUS2) << 8); |
145 | data->vid = (i2c_smbus_read_byte_data(client, |
146 | ADM1025_REG_VID) & 0x0f) |
147 | | ((i2c_smbus_read_byte_data(client, |
148 | ADM1025_REG_VID4) & 0x01) << 4); |
149 | |
150 | data->last_updated = jiffies; |
151 | data->valid = true; |
152 | } |
153 | |
154 | mutex_unlock(lock: &data->update_lock); |
155 | |
156 | return data; |
157 | } |
158 | |
159 | /* |
160 | * Sysfs stuff |
161 | */ |
162 | |
163 | static ssize_t |
164 | in_show(struct device *dev, struct device_attribute *attr, char *buf) |
165 | { |
166 | int index = to_sensor_dev_attr(attr)->index; |
167 | struct adm1025_data *data = adm1025_update_device(dev); |
168 | return sprintf(buf, fmt: "%u\n" , IN_FROM_REG(data->in[index], |
169 | in_scale[index])); |
170 | } |
171 | |
172 | static ssize_t |
173 | in_min_show(struct device *dev, struct device_attribute *attr, char *buf) |
174 | { |
175 | int index = to_sensor_dev_attr(attr)->index; |
176 | struct adm1025_data *data = adm1025_update_device(dev); |
177 | return sprintf(buf, fmt: "%u\n" , IN_FROM_REG(data->in_min[index], |
178 | in_scale[index])); |
179 | } |
180 | |
181 | static ssize_t |
182 | in_max_show(struct device *dev, struct device_attribute *attr, char *buf) |
183 | { |
184 | int index = to_sensor_dev_attr(attr)->index; |
185 | struct adm1025_data *data = adm1025_update_device(dev); |
186 | return sprintf(buf, fmt: "%u\n" , IN_FROM_REG(data->in_max[index], |
187 | in_scale[index])); |
188 | } |
189 | |
190 | static ssize_t |
191 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) |
192 | { |
193 | int index = to_sensor_dev_attr(attr)->index; |
194 | struct adm1025_data *data = adm1025_update_device(dev); |
195 | return sprintf(buf, fmt: "%d\n" , TEMP_FROM_REG(data->temp[index])); |
196 | } |
197 | |
198 | static ssize_t |
199 | temp_min_show(struct device *dev, struct device_attribute *attr, char *buf) |
200 | { |
201 | int index = to_sensor_dev_attr(attr)->index; |
202 | struct adm1025_data *data = adm1025_update_device(dev); |
203 | return sprintf(buf, fmt: "%d\n" , TEMP_FROM_REG(data->temp_min[index])); |
204 | } |
205 | |
206 | static ssize_t |
207 | temp_max_show(struct device *dev, struct device_attribute *attr, char *buf) |
208 | { |
209 | int index = to_sensor_dev_attr(attr)->index; |
210 | struct adm1025_data *data = adm1025_update_device(dev); |
211 | return sprintf(buf, fmt: "%d\n" , TEMP_FROM_REG(data->temp_max[index])); |
212 | } |
213 | |
214 | static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, |
215 | const char *buf, size_t count) |
216 | { |
217 | int index = to_sensor_dev_attr(attr)->index; |
218 | struct adm1025_data *data = dev_get_drvdata(dev); |
219 | struct i2c_client *client = data->client; |
220 | long val; |
221 | int err; |
222 | |
223 | err = kstrtol(s: buf, base: 10, res: &val); |
224 | if (err) |
225 | return err; |
226 | |
227 | mutex_lock(&data->update_lock); |
228 | data->in_min[index] = IN_TO_REG(val, in_scale[index]); |
229 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MIN(index), |
230 | value: data->in_min[index]); |
231 | mutex_unlock(lock: &data->update_lock); |
232 | return count; |
233 | } |
234 | |
235 | static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, |
236 | const char *buf, size_t count) |
237 | { |
238 | int index = to_sensor_dev_attr(attr)->index; |
239 | struct adm1025_data *data = dev_get_drvdata(dev); |
240 | struct i2c_client *client = data->client; |
241 | long val; |
242 | int err; |
243 | |
244 | err = kstrtol(s: buf, base: 10, res: &val); |
245 | if (err) |
246 | return err; |
247 | |
248 | mutex_lock(&data->update_lock); |
249 | data->in_max[index] = IN_TO_REG(val, in_scale[index]); |
250 | i2c_smbus_write_byte_data(client, ADM1025_REG_IN_MAX(index), |
251 | value: data->in_max[index]); |
252 | mutex_unlock(lock: &data->update_lock); |
253 | return count; |
254 | } |
255 | |
256 | static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); |
257 | static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); |
258 | static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); |
259 | static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); |
260 | static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); |
261 | static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); |
262 | static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); |
263 | static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); |
264 | static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); |
265 | static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); |
266 | static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); |
267 | static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); |
268 | static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); |
269 | static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); |
270 | static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); |
271 | static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); |
272 | static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); |
273 | static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); |
274 | |
275 | static ssize_t temp_min_store(struct device *dev, |
276 | struct device_attribute *attr, const char *buf, |
277 | size_t count) |
278 | { |
279 | int index = to_sensor_dev_attr(attr)->index; |
280 | struct adm1025_data *data = dev_get_drvdata(dev); |
281 | struct i2c_client *client = data->client; |
282 | long val; |
283 | int err; |
284 | |
285 | err = kstrtol(s: buf, base: 10, res: &val); |
286 | if (err) |
287 | return err; |
288 | |
289 | mutex_lock(&data->update_lock); |
290 | data->temp_min[index] = TEMP_TO_REG(val); |
291 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_LOW(index), |
292 | value: data->temp_min[index]); |
293 | mutex_unlock(lock: &data->update_lock); |
294 | return count; |
295 | } |
296 | |
297 | static ssize_t temp_max_store(struct device *dev, |
298 | struct device_attribute *attr, const char *buf, |
299 | size_t count) |
300 | { |
301 | int index = to_sensor_dev_attr(attr)->index; |
302 | struct adm1025_data *data = dev_get_drvdata(dev); |
303 | struct i2c_client *client = data->client; |
304 | long val; |
305 | int err; |
306 | |
307 | err = kstrtol(s: buf, base: 10, res: &val); |
308 | if (err) |
309 | return err; |
310 | |
311 | mutex_lock(&data->update_lock); |
312 | data->temp_max[index] = TEMP_TO_REG(val); |
313 | i2c_smbus_write_byte_data(client, ADM1025_REG_TEMP_HIGH(index), |
314 | value: data->temp_max[index]); |
315 | mutex_unlock(lock: &data->update_lock); |
316 | return count; |
317 | } |
318 | |
319 | static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); |
320 | static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); |
321 | static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); |
322 | static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); |
323 | static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); |
324 | static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); |
325 | |
326 | static ssize_t |
327 | alarms_show(struct device *dev, struct device_attribute *attr, char *buf) |
328 | { |
329 | struct adm1025_data *data = adm1025_update_device(dev); |
330 | return sprintf(buf, fmt: "%u\n" , data->alarms); |
331 | } |
332 | static DEVICE_ATTR_RO(alarms); |
333 | |
334 | static ssize_t |
335 | alarm_show(struct device *dev, struct device_attribute *attr, char *buf) |
336 | { |
337 | int bitnr = to_sensor_dev_attr(attr)->index; |
338 | struct adm1025_data *data = adm1025_update_device(dev); |
339 | return sprintf(buf, fmt: "%u\n" , (data->alarms >> bitnr) & 1); |
340 | } |
341 | static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0); |
342 | static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 1); |
343 | static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 2); |
344 | static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 3); |
345 | static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 8); |
346 | static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 9); |
347 | static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 5); |
348 | static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 4); |
349 | static SENSOR_DEVICE_ATTR_RO(temp1_fault, alarm, 14); |
350 | |
351 | static ssize_t |
352 | cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) |
353 | { |
354 | struct adm1025_data *data = adm1025_update_device(dev); |
355 | return sprintf(buf, fmt: "%u\n" , vid_from_reg(val: data->vid, vrm: data->vrm)); |
356 | } |
357 | static DEVICE_ATTR_RO(cpu0_vid); |
358 | |
359 | static ssize_t |
360 | vrm_show(struct device *dev, struct device_attribute *attr, char *buf) |
361 | { |
362 | struct adm1025_data *data = dev_get_drvdata(dev); |
363 | return sprintf(buf, fmt: "%u\n" , data->vrm); |
364 | } |
365 | static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, |
366 | const char *buf, size_t count) |
367 | { |
368 | struct adm1025_data *data = dev_get_drvdata(dev); |
369 | unsigned long val; |
370 | int err; |
371 | |
372 | err = kstrtoul(s: buf, base: 10, res: &val); |
373 | if (err) |
374 | return err; |
375 | |
376 | if (val > 255) |
377 | return -EINVAL; |
378 | |
379 | data->vrm = val; |
380 | return count; |
381 | } |
382 | static DEVICE_ATTR_RW(vrm); |
383 | |
384 | /* |
385 | * Real code |
386 | */ |
387 | |
388 | static struct attribute *adm1025_attributes[] = { |
389 | &sensor_dev_attr_in0_input.dev_attr.attr, |
390 | &sensor_dev_attr_in1_input.dev_attr.attr, |
391 | &sensor_dev_attr_in2_input.dev_attr.attr, |
392 | &sensor_dev_attr_in3_input.dev_attr.attr, |
393 | &sensor_dev_attr_in5_input.dev_attr.attr, |
394 | &sensor_dev_attr_in0_min.dev_attr.attr, |
395 | &sensor_dev_attr_in1_min.dev_attr.attr, |
396 | &sensor_dev_attr_in2_min.dev_attr.attr, |
397 | &sensor_dev_attr_in3_min.dev_attr.attr, |
398 | &sensor_dev_attr_in5_min.dev_attr.attr, |
399 | &sensor_dev_attr_in0_max.dev_attr.attr, |
400 | &sensor_dev_attr_in1_max.dev_attr.attr, |
401 | &sensor_dev_attr_in2_max.dev_attr.attr, |
402 | &sensor_dev_attr_in3_max.dev_attr.attr, |
403 | &sensor_dev_attr_in5_max.dev_attr.attr, |
404 | &sensor_dev_attr_in0_alarm.dev_attr.attr, |
405 | &sensor_dev_attr_in1_alarm.dev_attr.attr, |
406 | &sensor_dev_attr_in2_alarm.dev_attr.attr, |
407 | &sensor_dev_attr_in3_alarm.dev_attr.attr, |
408 | &sensor_dev_attr_in5_alarm.dev_attr.attr, |
409 | &sensor_dev_attr_temp1_input.dev_attr.attr, |
410 | &sensor_dev_attr_temp2_input.dev_attr.attr, |
411 | &sensor_dev_attr_temp1_min.dev_attr.attr, |
412 | &sensor_dev_attr_temp2_min.dev_attr.attr, |
413 | &sensor_dev_attr_temp1_max.dev_attr.attr, |
414 | &sensor_dev_attr_temp2_max.dev_attr.attr, |
415 | &sensor_dev_attr_temp1_alarm.dev_attr.attr, |
416 | &sensor_dev_attr_temp2_alarm.dev_attr.attr, |
417 | &sensor_dev_attr_temp1_fault.dev_attr.attr, |
418 | &dev_attr_alarms.attr, |
419 | &dev_attr_cpu0_vid.attr, |
420 | &dev_attr_vrm.attr, |
421 | NULL |
422 | }; |
423 | |
424 | static const struct attribute_group adm1025_group = { |
425 | .attrs = adm1025_attributes, |
426 | }; |
427 | |
428 | static struct attribute *adm1025_attributes_in4[] = { |
429 | &sensor_dev_attr_in4_input.dev_attr.attr, |
430 | &sensor_dev_attr_in4_min.dev_attr.attr, |
431 | &sensor_dev_attr_in4_max.dev_attr.attr, |
432 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
433 | NULL |
434 | }; |
435 | |
436 | static const struct attribute_group adm1025_group_in4 = { |
437 | .attrs = adm1025_attributes_in4, |
438 | }; |
439 | |
440 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
441 | static int adm1025_detect(struct i2c_client *client, |
442 | struct i2c_board_info *info) |
443 | { |
444 | struct i2c_adapter *adapter = client->adapter; |
445 | const char *name; |
446 | u8 man_id, chip_id; |
447 | |
448 | if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
449 | return -ENODEV; |
450 | |
451 | /* Check for unused bits */ |
452 | if ((i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG) & 0x80) |
453 | || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS1) & 0xC0) |
454 | || (i2c_smbus_read_byte_data(client, ADM1025_REG_STATUS2) & 0xBC)) { |
455 | dev_dbg(&adapter->dev, "ADM1025 detection failed at 0x%02x\n" , |
456 | client->addr); |
457 | return -ENODEV; |
458 | } |
459 | |
460 | /* Identification */ |
461 | chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); |
462 | if ((chip_id & 0xF0) != 0x20) |
463 | return -ENODEV; |
464 | |
465 | man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); |
466 | if (man_id == 0x41) |
467 | name = "adm1025" ; |
468 | else if (man_id == 0xA1 && client->addr != 0x2E) |
469 | name = "ne1619" ; |
470 | else |
471 | return -ENODEV; |
472 | |
473 | strscpy(p: info->type, q: name, I2C_NAME_SIZE); |
474 | |
475 | return 0; |
476 | } |
477 | |
478 | static void adm1025_init_client(struct i2c_client *client) |
479 | { |
480 | u8 reg; |
481 | struct adm1025_data *data = i2c_get_clientdata(client); |
482 | int i; |
483 | |
484 | data->vrm = vid_which_vrm(); |
485 | |
486 | /* |
487 | * Set high limits |
488 | * Usually we avoid setting limits on driver init, but it happens |
489 | * that the ADM1025 comes with stupid default limits (all registers |
490 | * set to 0). In case the chip has not gone through any limit |
491 | * setting yet, we better set the high limits to the max so that |
492 | * no alarm triggers. |
493 | */ |
494 | for (i = 0; i < 6; i++) { |
495 | reg = i2c_smbus_read_byte_data(client, |
496 | ADM1025_REG_IN_MAX(i)); |
497 | if (reg == 0) |
498 | i2c_smbus_write_byte_data(client, |
499 | ADM1025_REG_IN_MAX(i), |
500 | value: 0xFF); |
501 | } |
502 | for (i = 0; i < 2; i++) { |
503 | reg = i2c_smbus_read_byte_data(client, |
504 | ADM1025_REG_TEMP_HIGH(i)); |
505 | if (reg == 0) |
506 | i2c_smbus_write_byte_data(client, |
507 | ADM1025_REG_TEMP_HIGH(i), |
508 | value: 0x7F); |
509 | } |
510 | |
511 | /* |
512 | * Start the conversions |
513 | */ |
514 | reg = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); |
515 | if (!(reg & 0x01)) |
516 | i2c_smbus_write_byte_data(client, ADM1025_REG_CONFIG, |
517 | value: (reg&0x7E)|0x01); |
518 | } |
519 | |
520 | static int adm1025_probe(struct i2c_client *client) |
521 | { |
522 | struct device *dev = &client->dev; |
523 | struct device *hwmon_dev; |
524 | struct adm1025_data *data; |
525 | u8 config; |
526 | |
527 | data = devm_kzalloc(dev, size: sizeof(struct adm1025_data), GFP_KERNEL); |
528 | if (!data) |
529 | return -ENOMEM; |
530 | |
531 | i2c_set_clientdata(client, data); |
532 | data->client = client; |
533 | mutex_init(&data->update_lock); |
534 | |
535 | /* Initialize the ADM1025 chip */ |
536 | adm1025_init_client(client); |
537 | |
538 | /* sysfs hooks */ |
539 | data->groups[0] = &adm1025_group; |
540 | /* Pin 11 is either in4 (+12V) or VID4 */ |
541 | config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); |
542 | if (!(config & 0x20)) |
543 | data->groups[1] = &adm1025_group_in4; |
544 | |
545 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, name: client->name, |
546 | drvdata: data, groups: data->groups); |
547 | return PTR_ERR_OR_ZERO(ptr: hwmon_dev); |
548 | } |
549 | |
550 | static const struct i2c_device_id adm1025_id[] = { |
551 | { "adm1025" , adm1025 }, |
552 | { "ne1619" , ne1619 }, |
553 | { } |
554 | }; |
555 | MODULE_DEVICE_TABLE(i2c, adm1025_id); |
556 | |
557 | static struct i2c_driver adm1025_driver = { |
558 | .class = I2C_CLASS_HWMON, |
559 | .driver = { |
560 | .name = "adm1025" , |
561 | }, |
562 | .probe = adm1025_probe, |
563 | .id_table = adm1025_id, |
564 | .detect = adm1025_detect, |
565 | .address_list = normal_i2c, |
566 | }; |
567 | |
568 | module_i2c_driver(adm1025_driver); |
569 | |
570 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>" ); |
571 | MODULE_DESCRIPTION("ADM1025 driver" ); |
572 | MODULE_LICENSE("GPL" ); |
573 | |