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74ba9207 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * adm1025.c | |
4 | * | |
5 | * Copyright (C) 2000 Chen-Yuan Wu <gwu@esoft.com> | |
7c81c60f | 6 | * Copyright (C) 2003-2009 Jean Delvare <jdelvare@suse.de> |
1da177e4 LT |
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: | |
0303d063 | 16 | * https://www.onsemi.com/PowerSolutions/product.do?id=ADM1025 |
1da177e4 LT |
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. | |
1da177e4 LT |
33 | */ |
34 | ||
1da177e4 LT |
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> | |
943b0830 | 40 | #include <linux/hwmon.h> |
d8543e7f | 41 | #include <linux/hwmon-sysfs.h> |
303760b4 | 42 | #include <linux/hwmon-vid.h> |
943b0830 | 43 | #include <linux/err.h> |
9a61bf63 | 44 | #include <linux/mutex.h> |
1da177e4 LT |
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 | ||
25e9c86d | 52 | static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END }; |
1da177e4 | 53 | |
e5e9f44c | 54 | enum chips { adm1025, ne1619 }; |
1da177e4 LT |
55 | |
56 | /* | |
57 | * The ADM1025 registers | |
58 | */ | |
59 | ||
60 | #define ADM1025_REG_MAN_ID 0x3E | |
4e952799 | 61 | #define ADM1025_REG_CHIP_ID 0x3F |
1da177e4 LT |
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 | ||
4e952799 | 79 | static const int in_scale[6] = { 2500, 2250, 3300, 5000, 12000, 3300 }; |
1da177e4 | 80 | |
2b22de51 GR |
81 | #define IN_FROM_REG(reg, scale) (((reg) * (scale) + 96) / 192) |
82 | #define IN_TO_REG(val, scale) ((val) <= 0 ? 0 : \ | |
7cb53e28 | 83 | (val) >= (scale) * 255 / 192 ? 255 : \ |
2b22de51 | 84 | ((val) * 192 + (scale) / 2) / (scale)) |
1da177e4 LT |
85 | |
86 | #define TEMP_FROM_REG(reg) ((reg) * 1000) | |
87 | #define TEMP_TO_REG(val) ((val) <= -127500 ? -128 : \ | |
88 | (val) >= 126500 ? 127 : \ | |
2b22de51 GR |
89 | (((val) < 0 ? (val) - 500 : \ |
90 | (val) + 500) / 1000)) | |
1da177e4 | 91 | |
1da177e4 LT |
92 | /* |
93 | * Client data (each client gets its own) | |
94 | */ | |
95 | ||
96 | struct adm1025_data { | |
aab3f57a AL |
97 | struct i2c_client *client; |
98 | const struct attribute_group *groups[3]; | |
9a61bf63 | 99 | struct mutex update_lock; |
1da177e4 LT |
100 | char valid; /* zero 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 | ||
851a7afa AL |
114 | static struct adm1025_data *adm1025_update_device(struct device *dev) |
115 | { | |
aab3f57a AL |
116 | struct adm1025_data *data = dev_get_drvdata(dev); |
117 | struct i2c_client *client = data->client; | |
851a7afa AL |
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 = 1; | |
152 | } | |
153 | ||
154 | mutex_unlock(&data->update_lock); | |
155 | ||
156 | return data; | |
157 | } | |
158 | ||
1da177e4 LT |
159 | /* |
160 | * Sysfs stuff | |
161 | */ | |
162 | ||
d8543e7f | 163 | static ssize_t |
66efcd2b | 164 | in_show(struct device *dev, struct device_attribute *attr, char *buf) |
d8543e7f JD |
165 | { |
166 | int index = to_sensor_dev_attr(attr)->index; | |
167 | struct adm1025_data *data = adm1025_update_device(dev); | |
168 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in[index], | |
169 | in_scale[index])); | |
170 | } | |
171 | ||
172 | static ssize_t | |
66efcd2b | 173 | in_min_show(struct device *dev, struct device_attribute *attr, char *buf) |
d8543e7f JD |
174 | { |
175 | int index = to_sensor_dev_attr(attr)->index; | |
176 | struct adm1025_data *data = adm1025_update_device(dev); | |
177 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_min[index], | |
178 | in_scale[index])); | |
179 | } | |
180 | ||
181 | static ssize_t | |
66efcd2b | 182 | in_max_show(struct device *dev, struct device_attribute *attr, char *buf) |
d8543e7f JD |
183 | { |
184 | int index = to_sensor_dev_attr(attr)->index; | |
185 | struct adm1025_data *data = adm1025_update_device(dev); | |
186 | return sprintf(buf, "%u\n", IN_FROM_REG(data->in_max[index], | |
187 | in_scale[index])); | |
188 | } | |
189 | ||
190 | static ssize_t | |
66efcd2b | 191 | temp_show(struct device *dev, struct device_attribute *attr, char *buf) |
d8543e7f JD |
192 | { |
193 | int index = to_sensor_dev_attr(attr)->index; | |
194 | struct adm1025_data *data = adm1025_update_device(dev); | |
195 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[index])); | |
196 | } | |
197 | ||
198 | static ssize_t | |
66efcd2b | 199 | temp_min_show(struct device *dev, struct device_attribute *attr, char *buf) |
d8543e7f JD |
200 | { |
201 | int index = to_sensor_dev_attr(attr)->index; | |
202 | struct adm1025_data *data = adm1025_update_device(dev); | |
203 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[index])); | |
204 | } | |
205 | ||
206 | static ssize_t | |
66efcd2b | 207 | temp_max_show(struct device *dev, struct device_attribute *attr, char *buf) |
d8543e7f JD |
208 | { |
209 | int index = to_sensor_dev_attr(attr)->index; | |
210 | struct adm1025_data *data = adm1025_update_device(dev); | |
211 | return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[index])); | |
212 | } | |
213 | ||
66efcd2b GR |
214 | static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, |
215 | const char *buf, size_t count) | |
d8543e7f JD |
216 | { |
217 | int index = to_sensor_dev_attr(attr)->index; | |
aab3f57a AL |
218 | struct adm1025_data *data = dev_get_drvdata(dev); |
219 | struct i2c_client *client = data->client; | |
2b22de51 GR |
220 | long val; |
221 | int err; | |
222 | ||
223 | err = kstrtol(buf, 10, &val); | |
224 | if (err) | |
225 | return err; | |
d8543e7f JD |
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 | data->in_min[index]); | |
231 | mutex_unlock(&data->update_lock); | |
232 | return count; | |
233 | } | |
234 | ||
66efcd2b GR |
235 | static ssize_t in_max_store(struct device *dev, struct device_attribute *attr, |
236 | const char *buf, size_t count) | |
d8543e7f JD |
237 | { |
238 | int index = to_sensor_dev_attr(attr)->index; | |
aab3f57a AL |
239 | struct adm1025_data *data = dev_get_drvdata(dev); |
240 | struct i2c_client *client = data->client; | |
2b22de51 GR |
241 | long val; |
242 | int err; | |
243 | ||
244 | err = kstrtol(buf, 10, &val); | |
245 | if (err) | |
246 | return err; | |
d8543e7f JD |
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 | data->in_max[index]); | |
252 | mutex_unlock(&data->update_lock); | |
253 | return count; | |
254 | } | |
1da177e4 | 255 | |
66efcd2b GR |
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) | |
d8543e7f JD |
278 | { |
279 | int index = to_sensor_dev_attr(attr)->index; | |
aab3f57a AL |
280 | struct adm1025_data *data = dev_get_drvdata(dev); |
281 | struct i2c_client *client = data->client; | |
2b22de51 GR |
282 | long val; |
283 | int err; | |
284 | ||
285 | err = kstrtol(buf, 10, &val); | |
286 | if (err) | |
287 | return err; | |
d8543e7f JD |
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 | data->temp_min[index]); | |
293 | mutex_unlock(&data->update_lock); | |
294 | return count; | |
295 | } | |
296 | ||
66efcd2b GR |
297 | static ssize_t temp_max_store(struct device *dev, |
298 | struct device_attribute *attr, const char *buf, | |
299 | size_t count) | |
d8543e7f JD |
300 | { |
301 | int index = to_sensor_dev_attr(attr)->index; | |
aab3f57a AL |
302 | struct adm1025_data *data = dev_get_drvdata(dev); |
303 | struct i2c_client *client = data->client; | |
2b22de51 GR |
304 | long val; |
305 | int err; | |
306 | ||
307 | err = kstrtol(buf, 10, &val); | |
308 | if (err) | |
309 | return err; | |
d8543e7f JD |
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 | data->temp_max[index]); | |
315 | mutex_unlock(&data->update_lock); | |
316 | return count; | |
317 | } | |
318 | ||
66efcd2b GR |
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); | |
1da177e4 | 325 | |
4e952799 | 326 | static ssize_t |
41919a55 | 327 | alarms_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
328 | { |
329 | struct adm1025_data *data = adm1025_update_device(dev); | |
330 | return sprintf(buf, "%u\n", data->alarms); | |
331 | } | |
41919a55 | 332 | static DEVICE_ATTR_RO(alarms); |
1da177e4 | 333 | |
bb081300 | 334 | static ssize_t |
66efcd2b | 335 | alarm_show(struct device *dev, struct device_attribute *attr, char *buf) |
bb081300 JD |
336 | { |
337 | int bitnr = to_sensor_dev_attr(attr)->index; | |
338 | struct adm1025_data *data = adm1025_update_device(dev); | |
339 | return sprintf(buf, "%u\n", (data->alarms >> bitnr) & 1); | |
340 | } | |
66efcd2b GR |
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); | |
bb081300 | 350 | |
4e952799 | 351 | static ssize_t |
41919a55 | 352 | cpu0_vid_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
353 | { |
354 | struct adm1025_data *data = adm1025_update_device(dev); | |
355 | return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm)); | |
356 | } | |
41919a55 | 357 | static DEVICE_ATTR_RO(cpu0_vid); |
1da177e4 | 358 | |
4e952799 | 359 | static ssize_t |
41919a55 | 360 | vrm_show(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 | 361 | { |
90d6619a | 362 | struct adm1025_data *data = dev_get_drvdata(dev); |
1da177e4 LT |
363 | return sprintf(buf, "%u\n", data->vrm); |
364 | } | |
41919a55 JL |
365 | static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, |
366 | const char *buf, size_t count) | |
1da177e4 | 367 | { |
8f74efe8 | 368 | struct adm1025_data *data = dev_get_drvdata(dev); |
2b22de51 GR |
369 | unsigned long val; |
370 | int err; | |
371 | ||
372 | err = kstrtoul(buf, 10, &val); | |
373 | if (err) | |
374 | return err; | |
375 | ||
9c8ae728 AL |
376 | if (val > 255) |
377 | return -EINVAL; | |
378 | ||
2b22de51 | 379 | data->vrm = val; |
1da177e4 LT |
380 | return count; |
381 | } | |
41919a55 | 382 | static DEVICE_ATTR_RW(vrm); |
1da177e4 LT |
383 | |
384 | /* | |
385 | * Real code | |
386 | */ | |
387 | ||
681c6f7a | 388 | static struct attribute *adm1025_attributes[] = { |
d8543e7f JD |
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, | |
bb081300 JD |
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, | |
d8543e7f JD |
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, | |
bb081300 JD |
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, | |
681c6f7a MH |
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 | ||
4e952799 | 428 | static struct attribute *adm1025_attributes_in4[] = { |
d8543e7f JD |
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, | |
bb081300 | 432 | &sensor_dev_attr_in4_alarm.dev_attr.attr, |
681c6f7a MH |
433 | NULL |
434 | }; | |
435 | ||
4e952799 JD |
436 | static const struct attribute_group adm1025_group_in4 = { |
437 | .attrs = adm1025_attributes_in4, | |
681c6f7a MH |
438 | }; |
439 | ||
7dbafe02 | 440 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
310ec792 | 441 | static int adm1025_detect(struct i2c_client *client, |
7dbafe02 | 442 | struct i2c_board_info *info) |
1da177e4 | 443 | { |
7dbafe02 | 444 | struct i2c_adapter *adapter = client->adapter; |
95606723 JD |
445 | const char *name; |
446 | u8 man_id, chip_id; | |
1da177e4 LT |
447 | |
448 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
7dbafe02 | 449 | return -ENODEV; |
1da177e4 | 450 | |
95606723 JD |
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; | |
1da177e4 LT |
458 | } |
459 | ||
95606723 JD |
460 | /* Identification */ |
461 | chip_id = i2c_smbus_read_byte_data(client, ADM1025_REG_CHIP_ID); | |
462 | if ((chip_id & 0xF0) != 0x20) | |
463 | return -ENODEV; | |
1da177e4 | 464 | |
95606723 JD |
465 | man_id = i2c_smbus_read_byte_data(client, ADM1025_REG_MAN_ID); |
466 | if (man_id == 0x41) | |
1da177e4 | 467 | name = "adm1025"; |
95606723 | 468 | else if (man_id == 0xA1 && client->addr != 0x2E) |
1da177e4 | 469 | name = "ne1619"; |
95606723 JD |
470 | else |
471 | return -ENODEV; | |
472 | ||
7dbafe02 | 473 | strlcpy(info->type, name, I2C_NAME_SIZE); |
1da177e4 | 474 | |
7dbafe02 JD |
475 | return 0; |
476 | } | |
1da177e4 | 477 | |
851a7afa AL |
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 | 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 | 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 | (reg&0x7E)|0x01); | |
518 | } | |
519 | ||
67487038 | 520 | static int adm1025_probe(struct i2c_client *client) |
7dbafe02 | 521 | { |
aab3f57a AL |
522 | struct device *dev = &client->dev; |
523 | struct device *hwmon_dev; | |
7dbafe02 | 524 | struct adm1025_data *data; |
7dbafe02 JD |
525 | u8 config; |
526 | ||
aab3f57a | 527 | data = devm_kzalloc(dev, sizeof(struct adm1025_data), GFP_KERNEL); |
6702c998 GR |
528 | if (!data) |
529 | return -ENOMEM; | |
7dbafe02 JD |
530 | |
531 | i2c_set_clientdata(client, data); | |
aab3f57a | 532 | data->client = client; |
7dbafe02 | 533 | mutex_init(&data->update_lock); |
1da177e4 LT |
534 | |
535 | /* Initialize the ADM1025 chip */ | |
4e952799 | 536 | adm1025_init_client(client); |
1da177e4 | 537 | |
aab3f57a AL |
538 | /* sysfs hooks */ |
539 | data->groups[0] = &adm1025_group; | |
1da177e4 | 540 | /* Pin 11 is either in4 (+12V) or VID4 */ |
7dbafe02 | 541 | config = i2c_smbus_read_byte_data(client, ADM1025_REG_CONFIG); |
aab3f57a AL |
542 | if (!(config & 0x20)) |
543 | data->groups[1] = &adm1025_group_in4; | |
1da177e4 | 544 | |
aab3f57a AL |
545 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
546 | data, data->groups); | |
547 | return PTR_ERR_OR_ZERO(hwmon_dev); | |
1da177e4 LT |
548 | } |
549 | ||
851a7afa AL |
550 | static const struct i2c_device_id adm1025_id[] = { |
551 | { "adm1025", adm1025 }, | |
552 | { "ne1619", ne1619 }, | |
553 | { } | |
554 | }; | |
555 | MODULE_DEVICE_TABLE(i2c, adm1025_id); | |
1da177e4 | 556 | |
851a7afa AL |
557 | static struct i2c_driver adm1025_driver = { |
558 | .class = I2C_CLASS_HWMON, | |
559 | .driver = { | |
560 | .name = "adm1025", | |
561 | }, | |
67487038 | 562 | .probe_new = adm1025_probe, |
851a7afa AL |
563 | .id_table = adm1025_id, |
564 | .detect = adm1025_detect, | |
565 | .address_list = normal_i2c, | |
566 | }; | |
1da177e4 | 567 | |
f0967eea | 568 | module_i2c_driver(adm1025_driver); |
1da177e4 | 569 | |
7c81c60f | 570 | MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>"); |
1da177e4 LT |
571 | MODULE_DESCRIPTION("ADM1025 driver"); |
572 | MODULE_LICENSE("GPL"); |