1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Copyright (C) 2011 Alexander Stein <alexander.stein@systec-electronic.com> |
4 | * |
5 | * The LM95245 is a sensor chip made by TI / National Semiconductor. |
6 | * It reports up to two temperatures (its own plus an external one). |
7 | * |
8 | * This driver is based on lm95241.c |
9 | */ |
10 | |
11 | #include <linux/err.h> |
12 | #include <linux/init.h> |
13 | #include <linux/hwmon.h> |
14 | #include <linux/i2c.h> |
15 | #include <linux/module.h> |
16 | #include <linux/mutex.h> |
17 | #include <linux/regmap.h> |
18 | #include <linux/slab.h> |
19 | |
20 | static const unsigned short normal_i2c[] = { |
21 | 0x18, 0x19, 0x29, 0x4c, 0x4d, I2C_CLIENT_END }; |
22 | |
23 | /* LM95245 registers */ |
24 | /* general registers */ |
25 | #define LM95245_REG_RW_CONFIG1 0x03 |
26 | #define LM95245_REG_RW_CONVERS_RATE 0x04 |
27 | #define LM95245_REG_W_ONE_SHOT 0x0F |
28 | |
29 | /* diode configuration */ |
30 | #define LM95245_REG_RW_CONFIG2 0xBF |
31 | #define LM95245_REG_RW_REMOTE_OFFH 0x11 |
32 | #define LM95245_REG_RW_REMOTE_OFFL 0x12 |
33 | |
34 | /* status registers */ |
35 | #define LM95245_REG_R_STATUS1 0x02 |
36 | #define LM95245_REG_R_STATUS2 0x33 |
37 | |
38 | /* limit registers */ |
39 | #define LM95245_REG_RW_REMOTE_OS_LIMIT 0x07 |
40 | #define LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT 0x20 |
41 | #define LM95245_REG_RW_REMOTE_TCRIT_LIMIT 0x19 |
42 | #define LM95245_REG_RW_COMMON_HYSTERESIS 0x21 |
43 | |
44 | /* temperature signed */ |
45 | #define LM95245_REG_R_LOCAL_TEMPH_S 0x00 |
46 | #define LM95245_REG_R_LOCAL_TEMPL_S 0x30 |
47 | #define LM95245_REG_R_REMOTE_TEMPH_S 0x01 |
48 | #define LM95245_REG_R_REMOTE_TEMPL_S 0x10 |
49 | /* temperature unsigned */ |
50 | #define LM95245_REG_R_REMOTE_TEMPH_U 0x31 |
51 | #define LM95245_REG_R_REMOTE_TEMPL_U 0x32 |
52 | |
53 | /* id registers */ |
54 | #define LM95245_REG_R_MAN_ID 0xFE |
55 | #define LM95245_REG_R_CHIP_ID 0xFF |
56 | |
57 | /* LM95245 specific bitfields */ |
58 | #define CFG_STOP 0x40 |
59 | #define CFG_REMOTE_TCRIT_MASK 0x10 |
60 | #define CFG_REMOTE_OS_MASK 0x08 |
61 | #define CFG_LOCAL_TCRIT_MASK 0x04 |
62 | #define CFG_LOCAL_OS_MASK 0x02 |
63 | |
64 | #define CFG2_OS_A0 0x40 |
65 | #define CFG2_DIODE_FAULT_OS 0x20 |
66 | #define CFG2_DIODE_FAULT_TCRIT 0x10 |
67 | #define CFG2_REMOTE_TT 0x08 |
68 | #define CFG2_REMOTE_FILTER_DIS 0x00 |
69 | #define CFG2_REMOTE_FILTER_EN 0x06 |
70 | |
71 | /* conversation rate in ms */ |
72 | #define RATE_CR0063 0x00 |
73 | #define RATE_CR0364 0x01 |
74 | #define RATE_CR1000 0x02 |
75 | #define RATE_CR2500 0x03 |
76 | |
77 | #define STATUS1_ROS 0x10 |
78 | #define STATUS1_DIODE_FAULT 0x04 |
79 | #define STATUS1_RTCRIT 0x02 |
80 | #define STATUS1_LOC 0x01 |
81 | |
82 | #define MANUFACTURER_ID 0x01 |
83 | #define LM95235_REVISION 0xB1 |
84 | #define LM95245_REVISION 0xB3 |
85 | |
86 | /* Client data (each client gets its own) */ |
87 | struct lm95245_data { |
88 | struct regmap *regmap; |
89 | struct mutex update_lock; |
90 | int interval; /* in msecs */ |
91 | }; |
92 | |
93 | /* Conversions */ |
94 | static int temp_from_reg_unsigned(u8 val_h, u8 val_l) |
95 | { |
96 | return val_h * 1000 + val_l * 1000 / 256; |
97 | } |
98 | |
99 | static int temp_from_reg_signed(u8 val_h, u8 val_l) |
100 | { |
101 | if (val_h & 0x80) |
102 | return (val_h - 0x100) * 1000; |
103 | return temp_from_reg_unsigned(val_h, val_l); |
104 | } |
105 | |
106 | static int lm95245_read_conversion_rate(struct lm95245_data *data) |
107 | { |
108 | unsigned int rate; |
109 | int ret; |
110 | |
111 | ret = regmap_read(map: data->regmap, LM95245_REG_RW_CONVERS_RATE, val: &rate); |
112 | if (ret < 0) |
113 | return ret; |
114 | |
115 | switch (rate) { |
116 | case RATE_CR0063: |
117 | data->interval = 63; |
118 | break; |
119 | case RATE_CR0364: |
120 | data->interval = 364; |
121 | break; |
122 | case RATE_CR1000: |
123 | data->interval = 1000; |
124 | break; |
125 | case RATE_CR2500: |
126 | default: |
127 | data->interval = 2500; |
128 | break; |
129 | } |
130 | return 0; |
131 | } |
132 | |
133 | static int lm95245_set_conversion_rate(struct lm95245_data *data, long interval) |
134 | { |
135 | int ret, rate; |
136 | |
137 | if (interval <= 63) { |
138 | interval = 63; |
139 | rate = RATE_CR0063; |
140 | } else if (interval <= 364) { |
141 | interval = 364; |
142 | rate = RATE_CR0364; |
143 | } else if (interval <= 1000) { |
144 | interval = 1000; |
145 | rate = RATE_CR1000; |
146 | } else { |
147 | interval = 2500; |
148 | rate = RATE_CR2500; |
149 | } |
150 | |
151 | ret = regmap_write(map: data->regmap, LM95245_REG_RW_CONVERS_RATE, val: rate); |
152 | if (ret < 0) |
153 | return ret; |
154 | |
155 | data->interval = interval; |
156 | return 0; |
157 | } |
158 | |
159 | static int lm95245_read_temp(struct device *dev, u32 attr, int channel, |
160 | long *val) |
161 | { |
162 | struct lm95245_data *data = dev_get_drvdata(dev); |
163 | struct regmap *regmap = data->regmap; |
164 | int ret, regl, regh, regvall, regvalh; |
165 | |
166 | switch (attr) { |
167 | case hwmon_temp_input: |
168 | regl = channel ? LM95245_REG_R_REMOTE_TEMPL_S : |
169 | LM95245_REG_R_LOCAL_TEMPL_S; |
170 | regh = channel ? LM95245_REG_R_REMOTE_TEMPH_S : |
171 | LM95245_REG_R_LOCAL_TEMPH_S; |
172 | ret = regmap_read(map: regmap, reg: regl, val: ®vall); |
173 | if (ret < 0) |
174 | return ret; |
175 | ret = regmap_read(map: regmap, reg: regh, val: ®valh); |
176 | if (ret < 0) |
177 | return ret; |
178 | /* |
179 | * Local temp is always signed. |
180 | * Remote temp has both signed and unsigned data. |
181 | * Use signed calculation for remote if signed bit is set |
182 | * or if reported temperature is below signed limit. |
183 | */ |
184 | if (!channel || (regvalh & 0x80) || regvalh < 0x7f) { |
185 | *val = temp_from_reg_signed(val_h: regvalh, val_l: regvall); |
186 | return 0; |
187 | } |
188 | ret = regmap_read(map: regmap, LM95245_REG_R_REMOTE_TEMPL_U, |
189 | val: ®vall); |
190 | if (ret < 0) |
191 | return ret; |
192 | ret = regmap_read(map: regmap, LM95245_REG_R_REMOTE_TEMPH_U, |
193 | val: ®valh); |
194 | if (ret < 0) |
195 | return ret; |
196 | *val = temp_from_reg_unsigned(val_h: regvalh, val_l: regvall); |
197 | return 0; |
198 | case hwmon_temp_max: |
199 | ret = regmap_read(map: regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, |
200 | val: ®valh); |
201 | if (ret < 0) |
202 | return ret; |
203 | *val = regvalh * 1000; |
204 | return 0; |
205 | case hwmon_temp_crit: |
206 | regh = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : |
207 | LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; |
208 | ret = regmap_read(map: regmap, reg: regh, val: ®valh); |
209 | if (ret < 0) |
210 | return ret; |
211 | *val = regvalh * 1000; |
212 | return 0; |
213 | case hwmon_temp_max_hyst: |
214 | ret = regmap_read(map: regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, |
215 | val: ®valh); |
216 | if (ret < 0) |
217 | return ret; |
218 | ret = regmap_read(map: regmap, LM95245_REG_RW_COMMON_HYSTERESIS, |
219 | val: ®vall); |
220 | if (ret < 0) |
221 | return ret; |
222 | *val = (regvalh - regvall) * 1000; |
223 | return 0; |
224 | case hwmon_temp_crit_hyst: |
225 | regh = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : |
226 | LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; |
227 | ret = regmap_read(map: regmap, reg: regh, val: ®valh); |
228 | if (ret < 0) |
229 | return ret; |
230 | ret = regmap_read(map: regmap, LM95245_REG_RW_COMMON_HYSTERESIS, |
231 | val: ®vall); |
232 | if (ret < 0) |
233 | return ret; |
234 | *val = (regvalh - regvall) * 1000; |
235 | return 0; |
236 | case hwmon_temp_type: |
237 | ret = regmap_read(map: regmap, LM95245_REG_RW_CONFIG2, val: ®valh); |
238 | if (ret < 0) |
239 | return ret; |
240 | *val = (regvalh & CFG2_REMOTE_TT) ? 1 : 2; |
241 | return 0; |
242 | case hwmon_temp_offset: |
243 | ret = regmap_read(map: regmap, LM95245_REG_RW_REMOTE_OFFL, |
244 | val: ®vall); |
245 | if (ret < 0) |
246 | return ret; |
247 | ret = regmap_read(map: regmap, LM95245_REG_RW_REMOTE_OFFH, |
248 | val: ®valh); |
249 | if (ret < 0) |
250 | return ret; |
251 | *val = temp_from_reg_signed(val_h: regvalh, val_l: regvall); |
252 | return 0; |
253 | case hwmon_temp_max_alarm: |
254 | ret = regmap_read(map: regmap, LM95245_REG_R_STATUS1, val: ®valh); |
255 | if (ret < 0) |
256 | return ret; |
257 | *val = !!(regvalh & STATUS1_ROS); |
258 | return 0; |
259 | case hwmon_temp_crit_alarm: |
260 | ret = regmap_read(map: regmap, LM95245_REG_R_STATUS1, val: ®valh); |
261 | if (ret < 0) |
262 | return ret; |
263 | *val = !!(regvalh & (channel ? STATUS1_RTCRIT : STATUS1_LOC)); |
264 | return 0; |
265 | case hwmon_temp_fault: |
266 | ret = regmap_read(map: regmap, LM95245_REG_R_STATUS1, val: ®valh); |
267 | if (ret < 0) |
268 | return ret; |
269 | *val = !!(regvalh & STATUS1_DIODE_FAULT); |
270 | return 0; |
271 | default: |
272 | return -EOPNOTSUPP; |
273 | } |
274 | } |
275 | |
276 | static int lm95245_write_temp(struct device *dev, u32 attr, int channel, |
277 | long val) |
278 | { |
279 | struct lm95245_data *data = dev_get_drvdata(dev); |
280 | struct regmap *regmap = data->regmap; |
281 | unsigned int regval; |
282 | int ret, reg; |
283 | |
284 | switch (attr) { |
285 | case hwmon_temp_max: |
286 | val = clamp_val(val / 1000, 0, 255); |
287 | ret = regmap_write(map: regmap, LM95245_REG_RW_REMOTE_OS_LIMIT, val); |
288 | return ret; |
289 | case hwmon_temp_crit: |
290 | reg = channel ? LM95245_REG_RW_REMOTE_TCRIT_LIMIT : |
291 | LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT; |
292 | val = clamp_val(val / 1000, 0, channel ? 255 : 127); |
293 | ret = regmap_write(map: regmap, reg, val); |
294 | return ret; |
295 | case hwmon_temp_crit_hyst: |
296 | mutex_lock(&data->update_lock); |
297 | ret = regmap_read(map: regmap, LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT, |
298 | val: ®val); |
299 | if (ret < 0) { |
300 | mutex_unlock(lock: &data->update_lock); |
301 | return ret; |
302 | } |
303 | /* Clamp to reasonable range to prevent overflow */ |
304 | val = clamp_val(val, -1000000, 1000000); |
305 | val = regval - val / 1000; |
306 | val = clamp_val(val, 0, 31); |
307 | ret = regmap_write(map: regmap, LM95245_REG_RW_COMMON_HYSTERESIS, |
308 | val); |
309 | mutex_unlock(lock: &data->update_lock); |
310 | return ret; |
311 | case hwmon_temp_offset: |
312 | val = clamp_val(val, -128000, 127875); |
313 | val = val * 256 / 1000; |
314 | mutex_lock(&data->update_lock); |
315 | ret = regmap_write(map: regmap, LM95245_REG_RW_REMOTE_OFFL, |
316 | val: val & 0xe0); |
317 | if (ret < 0) { |
318 | mutex_unlock(lock: &data->update_lock); |
319 | return ret; |
320 | } |
321 | ret = regmap_write(map: regmap, LM95245_REG_RW_REMOTE_OFFH, |
322 | val: (val >> 8) & 0xff); |
323 | mutex_unlock(lock: &data->update_lock); |
324 | return ret; |
325 | case hwmon_temp_type: |
326 | if (val != 1 && val != 2) |
327 | return -EINVAL; |
328 | ret = regmap_update_bits(map: regmap, LM95245_REG_RW_CONFIG2, |
329 | CFG2_REMOTE_TT, |
330 | val: val == 1 ? CFG2_REMOTE_TT : 0); |
331 | return ret; |
332 | default: |
333 | return -EOPNOTSUPP; |
334 | } |
335 | } |
336 | |
337 | static int lm95245_read_chip(struct device *dev, u32 attr, int channel, |
338 | long *val) |
339 | { |
340 | struct lm95245_data *data = dev_get_drvdata(dev); |
341 | |
342 | switch (attr) { |
343 | case hwmon_chip_update_interval: |
344 | *val = data->interval; |
345 | return 0; |
346 | default: |
347 | return -EOPNOTSUPP; |
348 | } |
349 | } |
350 | |
351 | static int lm95245_write_chip(struct device *dev, u32 attr, int channel, |
352 | long val) |
353 | { |
354 | struct lm95245_data *data = dev_get_drvdata(dev); |
355 | int ret; |
356 | |
357 | switch (attr) { |
358 | case hwmon_chip_update_interval: |
359 | mutex_lock(&data->update_lock); |
360 | ret = lm95245_set_conversion_rate(data, interval: val); |
361 | mutex_unlock(lock: &data->update_lock); |
362 | return ret; |
363 | default: |
364 | return -EOPNOTSUPP; |
365 | } |
366 | } |
367 | |
368 | static int lm95245_read(struct device *dev, enum hwmon_sensor_types type, |
369 | u32 attr, int channel, long *val) |
370 | { |
371 | switch (type) { |
372 | case hwmon_chip: |
373 | return lm95245_read_chip(dev, attr, channel, val); |
374 | case hwmon_temp: |
375 | return lm95245_read_temp(dev, attr, channel, val); |
376 | default: |
377 | return -EOPNOTSUPP; |
378 | } |
379 | } |
380 | |
381 | static int lm95245_write(struct device *dev, enum hwmon_sensor_types type, |
382 | u32 attr, int channel, long val) |
383 | { |
384 | switch (type) { |
385 | case hwmon_chip: |
386 | return lm95245_write_chip(dev, attr, channel, val); |
387 | case hwmon_temp: |
388 | return lm95245_write_temp(dev, attr, channel, val); |
389 | default: |
390 | return -EOPNOTSUPP; |
391 | } |
392 | } |
393 | |
394 | static umode_t lm95245_temp_is_visible(const void *data, u32 attr, int channel) |
395 | { |
396 | switch (attr) { |
397 | case hwmon_temp_input: |
398 | case hwmon_temp_max_alarm: |
399 | case hwmon_temp_max_hyst: |
400 | case hwmon_temp_crit_alarm: |
401 | case hwmon_temp_fault: |
402 | return 0444; |
403 | case hwmon_temp_type: |
404 | case hwmon_temp_max: |
405 | case hwmon_temp_crit: |
406 | case hwmon_temp_offset: |
407 | return 0644; |
408 | case hwmon_temp_crit_hyst: |
409 | return (channel == 0) ? 0644 : 0444; |
410 | default: |
411 | return 0; |
412 | } |
413 | } |
414 | |
415 | static umode_t lm95245_is_visible(const void *data, |
416 | enum hwmon_sensor_types type, |
417 | u32 attr, int channel) |
418 | { |
419 | switch (type) { |
420 | case hwmon_chip: |
421 | switch (attr) { |
422 | case hwmon_chip_update_interval: |
423 | return 0644; |
424 | default: |
425 | return 0; |
426 | } |
427 | case hwmon_temp: |
428 | return lm95245_temp_is_visible(data, attr, channel); |
429 | default: |
430 | return 0; |
431 | } |
432 | } |
433 | |
434 | /* Return 0 if detection is successful, -ENODEV otherwise */ |
435 | static int lm95245_detect(struct i2c_client *new_client, |
436 | struct i2c_board_info *info) |
437 | { |
438 | struct i2c_adapter *adapter = new_client->adapter; |
439 | int address = new_client->addr; |
440 | const char *name; |
441 | int rev, id; |
442 | |
443 | if (!i2c_check_functionality(adap: adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
444 | return -ENODEV; |
445 | |
446 | id = i2c_smbus_read_byte_data(client: new_client, LM95245_REG_R_MAN_ID); |
447 | if (id != MANUFACTURER_ID) |
448 | return -ENODEV; |
449 | |
450 | rev = i2c_smbus_read_byte_data(client: new_client, LM95245_REG_R_CHIP_ID); |
451 | switch (rev) { |
452 | case LM95235_REVISION: |
453 | if (address != 0x18 && address != 0x29 && address != 0x4c) |
454 | return -ENODEV; |
455 | name = "lm95235" ; |
456 | break; |
457 | case LM95245_REVISION: |
458 | name = "lm95245" ; |
459 | break; |
460 | default: |
461 | return -ENODEV; |
462 | } |
463 | |
464 | strscpy(info->type, name, I2C_NAME_SIZE); |
465 | return 0; |
466 | } |
467 | |
468 | static int lm95245_init_client(struct lm95245_data *data) |
469 | { |
470 | int ret; |
471 | |
472 | ret = lm95245_read_conversion_rate(data); |
473 | if (ret < 0) |
474 | return ret; |
475 | |
476 | return regmap_update_bits(map: data->regmap, LM95245_REG_RW_CONFIG1, |
477 | CFG_STOP, val: 0); |
478 | } |
479 | |
480 | static bool lm95245_is_writeable_reg(struct device *dev, unsigned int reg) |
481 | { |
482 | switch (reg) { |
483 | case LM95245_REG_RW_CONFIG1: |
484 | case LM95245_REG_RW_CONVERS_RATE: |
485 | case LM95245_REG_W_ONE_SHOT: |
486 | case LM95245_REG_RW_CONFIG2: |
487 | case LM95245_REG_RW_REMOTE_OFFH: |
488 | case LM95245_REG_RW_REMOTE_OFFL: |
489 | case LM95245_REG_RW_REMOTE_OS_LIMIT: |
490 | case LM95245_REG_RW_LOCAL_OS_TCRIT_LIMIT: |
491 | case LM95245_REG_RW_REMOTE_TCRIT_LIMIT: |
492 | case LM95245_REG_RW_COMMON_HYSTERESIS: |
493 | return true; |
494 | default: |
495 | return false; |
496 | } |
497 | } |
498 | |
499 | static bool lm95245_is_volatile_reg(struct device *dev, unsigned int reg) |
500 | { |
501 | switch (reg) { |
502 | case LM95245_REG_R_STATUS1: |
503 | case LM95245_REG_R_STATUS2: |
504 | case LM95245_REG_R_LOCAL_TEMPH_S: |
505 | case LM95245_REG_R_LOCAL_TEMPL_S: |
506 | case LM95245_REG_R_REMOTE_TEMPH_S: |
507 | case LM95245_REG_R_REMOTE_TEMPL_S: |
508 | case LM95245_REG_R_REMOTE_TEMPH_U: |
509 | case LM95245_REG_R_REMOTE_TEMPL_U: |
510 | return true; |
511 | default: |
512 | return false; |
513 | } |
514 | } |
515 | |
516 | static const struct regmap_config lm95245_regmap_config = { |
517 | .reg_bits = 8, |
518 | .val_bits = 8, |
519 | .writeable_reg = lm95245_is_writeable_reg, |
520 | .volatile_reg = lm95245_is_volatile_reg, |
521 | .cache_type = REGCACHE_MAPLE, |
522 | .use_single_read = true, |
523 | .use_single_write = true, |
524 | }; |
525 | |
526 | static const struct hwmon_channel_info * const lm95245_info[] = { |
527 | HWMON_CHANNEL_INFO(chip, |
528 | HWMON_C_UPDATE_INTERVAL), |
529 | HWMON_CHANNEL_INFO(temp, |
530 | HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_CRIT_HYST | |
531 | HWMON_T_CRIT_ALARM, |
532 | HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_MAX_HYST | |
533 | HWMON_T_CRIT | HWMON_T_CRIT_HYST | HWMON_T_FAULT | |
534 | HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | |
535 | HWMON_T_TYPE | HWMON_T_OFFSET), |
536 | NULL |
537 | }; |
538 | |
539 | static const struct hwmon_ops lm95245_hwmon_ops = { |
540 | .is_visible = lm95245_is_visible, |
541 | .read = lm95245_read, |
542 | .write = lm95245_write, |
543 | }; |
544 | |
545 | static const struct hwmon_chip_info lm95245_chip_info = { |
546 | .ops = &lm95245_hwmon_ops, |
547 | .info = lm95245_info, |
548 | }; |
549 | |
550 | static int lm95245_probe(struct i2c_client *client) |
551 | { |
552 | struct device *dev = &client->dev; |
553 | struct lm95245_data *data; |
554 | struct device *hwmon_dev; |
555 | int ret; |
556 | |
557 | data = devm_kzalloc(dev, size: sizeof(struct lm95245_data), GFP_KERNEL); |
558 | if (!data) |
559 | return -ENOMEM; |
560 | |
561 | data->regmap = devm_regmap_init_i2c(client, &lm95245_regmap_config); |
562 | if (IS_ERR(ptr: data->regmap)) |
563 | return PTR_ERR(ptr: data->regmap); |
564 | |
565 | mutex_init(&data->update_lock); |
566 | |
567 | /* Initialize the LM95245 chip */ |
568 | ret = lm95245_init_client(data); |
569 | if (ret < 0) |
570 | return ret; |
571 | |
572 | hwmon_dev = devm_hwmon_device_register_with_info(dev, name: client->name, |
573 | drvdata: data, |
574 | info: &lm95245_chip_info, |
575 | NULL); |
576 | return PTR_ERR_OR_ZERO(ptr: hwmon_dev); |
577 | } |
578 | |
579 | /* Driver data (common to all clients) */ |
580 | static const struct i2c_device_id lm95245_id[] = { |
581 | { "lm95235" , 0 }, |
582 | { "lm95245" , 0 }, |
583 | { } |
584 | }; |
585 | MODULE_DEVICE_TABLE(i2c, lm95245_id); |
586 | |
587 | static const struct of_device_id __maybe_unused lm95245_of_match[] = { |
588 | { .compatible = "national,lm95235" }, |
589 | { .compatible = "national,lm95245" }, |
590 | { }, |
591 | }; |
592 | MODULE_DEVICE_TABLE(of, lm95245_of_match); |
593 | |
594 | static struct i2c_driver lm95245_driver = { |
595 | .class = I2C_CLASS_HWMON, |
596 | .driver = { |
597 | .name = "lm95245" , |
598 | .of_match_table = of_match_ptr(lm95245_of_match), |
599 | }, |
600 | .probe = lm95245_probe, |
601 | .id_table = lm95245_id, |
602 | .detect = lm95245_detect, |
603 | .address_list = normal_i2c, |
604 | }; |
605 | |
606 | module_i2c_driver(lm95245_driver); |
607 | |
608 | MODULE_AUTHOR("Alexander Stein <alexander.stein@systec-electronic.com>" ); |
609 | MODULE_DESCRIPTION("LM95235/LM95245 sensor driver" ); |
610 | MODULE_LICENSE("GPL" ); |
611 | |