adt7411.c 18 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor)
  4. *
  5. * Copyright (C) 2008, 2010 Pengutronix
  6. *
  7. * TODO: SPI, use power-down mode for suspend?, interrupt handling?
  8. */
  9. #include <linux/kernel.h>
  10. #include <linux/module.h>
  11. #include <linux/init.h>
  12. #include <linux/err.h>
  13. #include <linux/mutex.h>
  14. #include <linux/jiffies.h>
  15. #include <linux/i2c.h>
  16. #include <linux/hwmon.h>
  17. #include <linux/hwmon-sysfs.h>
  18. #include <linux/slab.h>
  19. #define ADT7411_REG_STAT_1 0x00
  20. #define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0)
  21. #define ADT7411_STAT_1_INT_TEMP_LOW BIT(1)
  22. #define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2)
  23. #define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3)
  24. #define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4)
  25. #define ADT7411_STAT_1_AIN2 BIT(5)
  26. #define ADT7411_STAT_1_AIN3 BIT(6)
  27. #define ADT7411_STAT_1_AIN4 BIT(7)
  28. #define ADT7411_REG_STAT_2 0x01
  29. #define ADT7411_STAT_2_AIN5 BIT(0)
  30. #define ADT7411_STAT_2_AIN6 BIT(1)
  31. #define ADT7411_STAT_2_AIN7 BIT(2)
  32. #define ADT7411_STAT_2_AIN8 BIT(3)
  33. #define ADT7411_STAT_2_VDD BIT(4)
  34. #define ADT7411_REG_INT_TEMP_VDD_LSB 0x03
  35. #define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04
  36. #define ADT7411_REG_VDD_MSB 0x06
  37. #define ADT7411_REG_INT_TEMP_MSB 0x07
  38. #define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08
  39. #define ADT7411_REG_CFG1 0x18
  40. #define ADT7411_CFG1_START_MONITOR BIT(0)
  41. #define ADT7411_CFG1_RESERVED_BIT1 BIT(1)
  42. #define ADT7411_CFG1_EXT_TDM BIT(2)
  43. #define ADT7411_CFG1_RESERVED_BIT3 BIT(3)
  44. #define ADT7411_REG_CFG2 0x19
  45. #define ADT7411_CFG2_DISABLE_AVG BIT(5)
  46. #define ADT7411_REG_CFG3 0x1a
  47. #define ADT7411_CFG3_ADC_CLK_225 BIT(0)
  48. #define ADT7411_CFG3_RESERVED_BIT1 BIT(1)
  49. #define ADT7411_CFG3_RESERVED_BIT2 BIT(2)
  50. #define ADT7411_CFG3_RESERVED_BIT3 BIT(3)
  51. #define ADT7411_CFG3_REF_VDD BIT(4)
  52. #define ADT7411_REG_VDD_HIGH 0x23
  53. #define ADT7411_REG_VDD_LOW 0x24
  54. #define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr))
  55. #define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr))
  56. #define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \
  57. ? 0x2b + 2 * ((nr)-2) \
  58. : 0x27)
  59. #define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \
  60. ? 0x2c + 2 * ((nr)-2) \
  61. : 0x28)
  62. #define ADT7411_REG_DEVICE_ID 0x4d
  63. #define ADT7411_REG_MANUFACTURER_ID 0x4e
  64. #define ADT7411_DEVICE_ID 0x2
  65. #define ADT7411_MANUFACTURER_ID 0x41
  66. static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END };
  67. static const u8 adt7411_in_alarm_reg[] = {
  68. ADT7411_REG_STAT_2,
  69. ADT7411_REG_STAT_1,
  70. ADT7411_REG_STAT_1,
  71. ADT7411_REG_STAT_1,
  72. ADT7411_REG_STAT_1,
  73. ADT7411_REG_STAT_2,
  74. ADT7411_REG_STAT_2,
  75. ADT7411_REG_STAT_2,
  76. ADT7411_REG_STAT_2,
  77. };
  78. static const u8 adt7411_in_alarm_bits[] = {
  79. ADT7411_STAT_2_VDD,
  80. ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1,
  81. ADT7411_STAT_1_AIN2,
  82. ADT7411_STAT_1_AIN3,
  83. ADT7411_STAT_1_AIN4,
  84. ADT7411_STAT_2_AIN5,
  85. ADT7411_STAT_2_AIN6,
  86. ADT7411_STAT_2_AIN7,
  87. ADT7411_STAT_2_AIN8,
  88. };
  89. struct adt7411_data {
  90. struct mutex device_lock; /* for "atomic" device accesses */
  91. struct mutex update_lock;
  92. unsigned long next_update;
  93. long vref_cached;
  94. struct i2c_client *client;
  95. bool use_ext_temp;
  96. };
  97. /*
  98. * When reading a register containing (up to 4) lsb, all associated
  99. * msb-registers get locked by the hardware. After _one_ of those msb is read,
  100. * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb
  101. * is protected here with a mutex, too.
  102. */
  103. static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg,
  104. u8 msb_reg, u8 lsb_shift)
  105. {
  106. struct adt7411_data *data = i2c_get_clientdata(client);
  107. int val, tmp;
  108. mutex_lock(&data->device_lock);
  109. val = i2c_smbus_read_byte_data(client, lsb_reg);
  110. if (val < 0)
  111. goto exit_unlock;
  112. tmp = (val >> lsb_shift) & 3;
  113. val = i2c_smbus_read_byte_data(client, msb_reg);
  114. if (val >= 0)
  115. val = (val << 2) | tmp;
  116. exit_unlock:
  117. mutex_unlock(&data->device_lock);
  118. return val;
  119. }
  120. static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit,
  121. bool flag)
  122. {
  123. struct adt7411_data *data = i2c_get_clientdata(client);
  124. int ret, val;
  125. mutex_lock(&data->device_lock);
  126. ret = i2c_smbus_read_byte_data(client, reg);
  127. if (ret < 0)
  128. goto exit_unlock;
  129. if (flag)
  130. val = ret | bit;
  131. else
  132. val = ret & ~bit;
  133. ret = i2c_smbus_write_byte_data(client, reg, val);
  134. exit_unlock:
  135. mutex_unlock(&data->device_lock);
  136. return ret;
  137. }
  138. static ssize_t adt7411_show_bit(struct device *dev,
  139. struct device_attribute *attr, char *buf)
  140. {
  141. struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr);
  142. struct adt7411_data *data = dev_get_drvdata(dev);
  143. struct i2c_client *client = data->client;
  144. int ret = i2c_smbus_read_byte_data(client, attr2->index);
  145. return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr));
  146. }
  147. static ssize_t adt7411_set_bit(struct device *dev,
  148. struct device_attribute *attr, const char *buf,
  149. size_t count)
  150. {
  151. struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr);
  152. struct adt7411_data *data = dev_get_drvdata(dev);
  153. struct i2c_client *client = data->client;
  154. int ret;
  155. unsigned long flag;
  156. ret = kstrtoul(buf, 0, &flag);
  157. if (ret || flag > 1)
  158. return -EINVAL;
  159. ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag);
  160. /* force update */
  161. mutex_lock(&data->update_lock);
  162. data->next_update = jiffies;
  163. mutex_unlock(&data->update_lock);
  164. return ret < 0 ? ret : count;
  165. }
  166. #define ADT7411_BIT_ATTR(__name, __reg, __bit) \
  167. SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \
  168. adt7411_set_bit, __bit, __reg)
  169. static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG);
  170. static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225);
  171. static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD);
  172. static struct attribute *adt7411_attrs[] = {
  173. &sensor_dev_attr_no_average.dev_attr.attr,
  174. &sensor_dev_attr_fast_sampling.dev_attr.attr,
  175. &sensor_dev_attr_adc_ref_vdd.dev_attr.attr,
  176. NULL
  177. };
  178. ATTRIBUTE_GROUPS(adt7411);
  179. static int adt7411_read_in_alarm(struct device *dev, int channel, long *val)
  180. {
  181. struct adt7411_data *data = dev_get_drvdata(dev);
  182. struct i2c_client *client = data->client;
  183. int ret;
  184. ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]);
  185. if (ret < 0)
  186. return ret;
  187. *val = !!(ret & adt7411_in_alarm_bits[channel]);
  188. return 0;
  189. }
  190. static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val)
  191. {
  192. struct adt7411_data *data = dev_get_drvdata(dev);
  193. struct i2c_client *client = data->client;
  194. int ret;
  195. switch (attr) {
  196. case hwmon_in_input:
  197. ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB,
  198. ADT7411_REG_VDD_MSB, 2);
  199. if (ret < 0)
  200. return ret;
  201. *val = ret * 7000 / 1024;
  202. return 0;
  203. case hwmon_in_min:
  204. ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW);
  205. if (ret < 0)
  206. return ret;
  207. *val = ret * 7000 / 256;
  208. return 0;
  209. case hwmon_in_max:
  210. ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH);
  211. if (ret < 0)
  212. return ret;
  213. *val = ret * 7000 / 256;
  214. return 0;
  215. case hwmon_in_alarm:
  216. return adt7411_read_in_alarm(dev, 0, val);
  217. default:
  218. return -EOPNOTSUPP;
  219. }
  220. }
  221. static int adt7411_update_vref(struct device *dev)
  222. {
  223. struct adt7411_data *data = dev_get_drvdata(dev);
  224. struct i2c_client *client = data->client;
  225. int val;
  226. if (time_after_eq(jiffies, data->next_update)) {
  227. val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3);
  228. if (val < 0)
  229. return val;
  230. if (val & ADT7411_CFG3_REF_VDD) {
  231. val = adt7411_read_in_vdd(dev, hwmon_in_input,
  232. &data->vref_cached);
  233. if (val < 0)
  234. return val;
  235. } else {
  236. data->vref_cached = 2250;
  237. }
  238. data->next_update = jiffies + HZ;
  239. }
  240. return 0;
  241. }
  242. static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel,
  243. long *val)
  244. {
  245. struct adt7411_data *data = dev_get_drvdata(dev);
  246. struct i2c_client *client = data->client;
  247. int ret;
  248. int reg, lsb_reg, lsb_shift;
  249. int nr = channel - 1;
  250. mutex_lock(&data->update_lock);
  251. ret = adt7411_update_vref(dev);
  252. if (ret < 0)
  253. goto exit_unlock;
  254. switch (attr) {
  255. case hwmon_in_input:
  256. lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2);
  257. lsb_shift = 2 * (nr & 0x03);
  258. ret = adt7411_read_10_bit(client, lsb_reg,
  259. ADT7411_REG_EXT_TEMP_AIN1_MSB + nr,
  260. lsb_shift);
  261. if (ret < 0)
  262. goto exit_unlock;
  263. *val = ret * data->vref_cached / 1024;
  264. ret = 0;
  265. break;
  266. case hwmon_in_min:
  267. case hwmon_in_max:
  268. reg = (attr == hwmon_in_min)
  269. ? ADT7411_REG_IN_LOW(channel)
  270. : ADT7411_REG_IN_HIGH(channel);
  271. ret = i2c_smbus_read_byte_data(client, reg);
  272. if (ret < 0)
  273. goto exit_unlock;
  274. *val = ret * data->vref_cached / 256;
  275. ret = 0;
  276. break;
  277. case hwmon_in_alarm:
  278. ret = adt7411_read_in_alarm(dev, channel, val);
  279. break;
  280. default:
  281. ret = -EOPNOTSUPP;
  282. break;
  283. }
  284. exit_unlock:
  285. mutex_unlock(&data->update_lock);
  286. return ret;
  287. }
  288. static int adt7411_read_in(struct device *dev, u32 attr, int channel,
  289. long *val)
  290. {
  291. if (channel == 0)
  292. return adt7411_read_in_vdd(dev, attr, val);
  293. else
  294. return adt7411_read_in_chan(dev, attr, channel, val);
  295. }
  296. static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel,
  297. long *val)
  298. {
  299. struct adt7411_data *data = dev_get_drvdata(dev);
  300. struct i2c_client *client = data->client;
  301. int ret, bit;
  302. ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1);
  303. if (ret < 0)
  304. return ret;
  305. switch (attr) {
  306. case hwmon_temp_min_alarm:
  307. bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW
  308. : ADT7411_STAT_1_INT_TEMP_LOW;
  309. break;
  310. case hwmon_temp_max_alarm:
  311. bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1
  312. : ADT7411_STAT_1_INT_TEMP_HIGH;
  313. break;
  314. case hwmon_temp_fault:
  315. bit = ADT7411_STAT_1_EXT_TEMP_FAULT;
  316. break;
  317. default:
  318. return -EOPNOTSUPP;
  319. }
  320. *val = !!(ret & bit);
  321. return 0;
  322. }
  323. static int adt7411_read_temp(struct device *dev, u32 attr, int channel,
  324. long *val)
  325. {
  326. struct adt7411_data *data = dev_get_drvdata(dev);
  327. struct i2c_client *client = data->client;
  328. int ret, reg, regl, regh;
  329. switch (attr) {
  330. case hwmon_temp_input:
  331. regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB :
  332. ADT7411_REG_INT_TEMP_VDD_LSB;
  333. regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB :
  334. ADT7411_REG_INT_TEMP_MSB;
  335. ret = adt7411_read_10_bit(client, regl, regh, 0);
  336. if (ret < 0)
  337. return ret;
  338. ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */
  339. *val = ret * 250;
  340. return 0;
  341. case hwmon_temp_min:
  342. case hwmon_temp_max:
  343. reg = (attr == hwmon_temp_min)
  344. ? ADT7411_REG_TEMP_LOW(channel)
  345. : ADT7411_REG_TEMP_HIGH(channel);
  346. ret = i2c_smbus_read_byte_data(client, reg);
  347. if (ret < 0)
  348. return ret;
  349. ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */
  350. *val = ret * 1000;
  351. return 0;
  352. case hwmon_temp_min_alarm:
  353. case hwmon_temp_max_alarm:
  354. case hwmon_temp_fault:
  355. return adt7411_read_temp_alarm(dev, attr, channel, val);
  356. default:
  357. return -EOPNOTSUPP;
  358. }
  359. }
  360. static int adt7411_read(struct device *dev, enum hwmon_sensor_types type,
  361. u32 attr, int channel, long *val)
  362. {
  363. switch (type) {
  364. case hwmon_in:
  365. return adt7411_read_in(dev, attr, channel, val);
  366. case hwmon_temp:
  367. return adt7411_read_temp(dev, attr, channel, val);
  368. default:
  369. return -EOPNOTSUPP;
  370. }
  371. }
  372. static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val)
  373. {
  374. struct adt7411_data *data = dev_get_drvdata(dev);
  375. struct i2c_client *client = data->client;
  376. int reg;
  377. val = clamp_val(val, 0, 255 * 7000 / 256);
  378. val = DIV_ROUND_CLOSEST(val * 256, 7000);
  379. switch (attr) {
  380. case hwmon_in_min:
  381. reg = ADT7411_REG_VDD_LOW;
  382. break;
  383. case hwmon_in_max:
  384. reg = ADT7411_REG_VDD_HIGH;
  385. break;
  386. default:
  387. return -EOPNOTSUPP;
  388. }
  389. return i2c_smbus_write_byte_data(client, reg, val);
  390. }
  391. static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel,
  392. long val)
  393. {
  394. struct adt7411_data *data = dev_get_drvdata(dev);
  395. struct i2c_client *client = data->client;
  396. int ret, reg;
  397. mutex_lock(&data->update_lock);
  398. ret = adt7411_update_vref(dev);
  399. if (ret < 0)
  400. goto exit_unlock;
  401. val = clamp_val(val, 0, 255 * data->vref_cached / 256);
  402. val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached);
  403. switch (attr) {
  404. case hwmon_in_min:
  405. reg = ADT7411_REG_IN_LOW(channel);
  406. break;
  407. case hwmon_in_max:
  408. reg = ADT7411_REG_IN_HIGH(channel);
  409. break;
  410. default:
  411. ret = -EOPNOTSUPP;
  412. goto exit_unlock;
  413. }
  414. ret = i2c_smbus_write_byte_data(client, reg, val);
  415. exit_unlock:
  416. mutex_unlock(&data->update_lock);
  417. return ret;
  418. }
  419. static int adt7411_write_in(struct device *dev, u32 attr, int channel,
  420. long val)
  421. {
  422. if (channel == 0)
  423. return adt7411_write_in_vdd(dev, attr, val);
  424. else
  425. return adt7411_write_in_chan(dev, attr, channel, val);
  426. }
  427. static int adt7411_write_temp(struct device *dev, u32 attr, int channel,
  428. long val)
  429. {
  430. struct adt7411_data *data = dev_get_drvdata(dev);
  431. struct i2c_client *client = data->client;
  432. int reg;
  433. val = clamp_val(val, -128000, 127000);
  434. val = DIV_ROUND_CLOSEST(val, 1000);
  435. switch (attr) {
  436. case hwmon_temp_min:
  437. reg = ADT7411_REG_TEMP_LOW(channel);
  438. break;
  439. case hwmon_temp_max:
  440. reg = ADT7411_REG_TEMP_HIGH(channel);
  441. break;
  442. default:
  443. return -EOPNOTSUPP;
  444. }
  445. return i2c_smbus_write_byte_data(client, reg, val);
  446. }
  447. static int adt7411_write(struct device *dev, enum hwmon_sensor_types type,
  448. u32 attr, int channel, long val)
  449. {
  450. switch (type) {
  451. case hwmon_in:
  452. return adt7411_write_in(dev, attr, channel, val);
  453. case hwmon_temp:
  454. return adt7411_write_temp(dev, attr, channel, val);
  455. default:
  456. return -EOPNOTSUPP;
  457. }
  458. }
  459. static umode_t adt7411_is_visible(const void *_data,
  460. enum hwmon_sensor_types type,
  461. u32 attr, int channel)
  462. {
  463. const struct adt7411_data *data = _data;
  464. bool visible;
  465. switch (type) {
  466. case hwmon_in:
  467. visible = channel == 0 || channel >= 3 || !data->use_ext_temp;
  468. switch (attr) {
  469. case hwmon_in_input:
  470. case hwmon_in_alarm:
  471. return visible ? S_IRUGO : 0;
  472. case hwmon_in_min:
  473. case hwmon_in_max:
  474. return visible ? S_IRUGO | S_IWUSR : 0;
  475. }
  476. break;
  477. case hwmon_temp:
  478. visible = channel == 0 || data->use_ext_temp;
  479. switch (attr) {
  480. case hwmon_temp_input:
  481. case hwmon_temp_min_alarm:
  482. case hwmon_temp_max_alarm:
  483. case hwmon_temp_fault:
  484. return visible ? S_IRUGO : 0;
  485. case hwmon_temp_min:
  486. case hwmon_temp_max:
  487. return visible ? S_IRUGO | S_IWUSR : 0;
  488. }
  489. break;
  490. default:
  491. break;
  492. }
  493. return 0;
  494. }
  495. static int adt7411_detect(struct i2c_client *client,
  496. struct i2c_board_info *info)
  497. {
  498. int val;
  499. if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
  500. return -ENODEV;
  501. val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID);
  502. if (val < 0 || val != ADT7411_MANUFACTURER_ID) {
  503. dev_dbg(&client->dev,
  504. "Wrong manufacturer ID. Got %d, expected %d\n",
  505. val, ADT7411_MANUFACTURER_ID);
  506. return -ENODEV;
  507. }
  508. val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID);
  509. if (val < 0 || val != ADT7411_DEVICE_ID) {
  510. dev_dbg(&client->dev,
  511. "Wrong device ID. Got %d, expected %d\n",
  512. val, ADT7411_DEVICE_ID);
  513. return -ENODEV;
  514. }
  515. strlcpy(info->type, "adt7411", I2C_NAME_SIZE);
  516. return 0;
  517. }
  518. static int adt7411_init_device(struct adt7411_data *data)
  519. {
  520. int ret;
  521. u8 val;
  522. ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3);
  523. if (ret < 0)
  524. return ret;
  525. /*
  526. * We must only write zero to bit 1 and bit 2 and only one to bit 3
  527. * according to the datasheet.
  528. */
  529. val = ret;
  530. val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2);
  531. val |= ADT7411_CFG3_RESERVED_BIT3;
  532. ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val);
  533. if (ret < 0)
  534. return ret;
  535. ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1);
  536. if (ret < 0)
  537. return ret;
  538. data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM;
  539. /*
  540. * We must only write zero to bit 1 and only one to bit 3 according to
  541. * the datasheet.
  542. */
  543. val = ret;
  544. val &= ~ADT7411_CFG1_RESERVED_BIT1;
  545. val |= ADT7411_CFG1_RESERVED_BIT3;
  546. /* enable monitoring */
  547. val |= ADT7411_CFG1_START_MONITOR;
  548. return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val);
  549. }
  550. static const struct hwmon_channel_info *adt7411_info[] = {
  551. HWMON_CHANNEL_INFO(in,
  552. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
  553. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
  554. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
  555. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
  556. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
  557. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
  558. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
  559. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM,
  560. HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM),
  561. HWMON_CHANNEL_INFO(temp,
  562. HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
  563. HWMON_T_MAX | HWMON_T_MAX_ALARM,
  564. HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM |
  565. HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT),
  566. NULL
  567. };
  568. static const struct hwmon_ops adt7411_hwmon_ops = {
  569. .is_visible = adt7411_is_visible,
  570. .read = adt7411_read,
  571. .write = adt7411_write,
  572. };
  573. static const struct hwmon_chip_info adt7411_chip_info = {
  574. .ops = &adt7411_hwmon_ops,
  575. .info = adt7411_info,
  576. };
  577. static int adt7411_probe(struct i2c_client *client)
  578. {
  579. struct device *dev = &client->dev;
  580. struct adt7411_data *data;
  581. struct device *hwmon_dev;
  582. int ret;
  583. data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
  584. if (!data)
  585. return -ENOMEM;
  586. i2c_set_clientdata(client, data);
  587. data->client = client;
  588. mutex_init(&data->device_lock);
  589. mutex_init(&data->update_lock);
  590. ret = adt7411_init_device(data);
  591. if (ret < 0)
  592. return ret;
  593. /* force update on first occasion */
  594. data->next_update = jiffies;
  595. hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,
  596. data,
  597. &adt7411_chip_info,
  598. adt7411_groups);
  599. return PTR_ERR_OR_ZERO(hwmon_dev);
  600. }
  601. static const struct i2c_device_id adt7411_id[] = {
  602. { "adt7411", 0 },
  603. { }
  604. };
  605. MODULE_DEVICE_TABLE(i2c, adt7411_id);
  606. static struct i2c_driver adt7411_driver = {
  607. .driver = {
  608. .name = "adt7411",
  609. },
  610. .probe_new = adt7411_probe,
  611. .id_table = adt7411_id,
  612. .detect = adt7411_detect,
  613. .address_list = normal_i2c,
  614. .class = I2C_CLASS_HWMON,
  615. };
  616. module_i2c_driver(adt7411_driver);
  617. MODULE_AUTHOR("Sascha Hauer, Wolfram Sang <kernel@pengutronix.de>");
  618. MODULE_DESCRIPTION("ADT7411 driver");
  619. MODULE_LICENSE("GPL v2");