mp2629_charger.c 17 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * MP2629 battery charger driver
  4. *
  5. * Copyright 2020 Monolithic Power Systems, Inc
  6. *
  7. * Author: Saravanan Sekar <sravanhome@gmail.com>
  8. */
  9. #include <linux/bits.h>
  10. #include <linux/iio/consumer.h>
  11. #include <linux/iio/types.h>
  12. #include <linux/interrupt.h>
  13. #include <linux/mfd/mp2629.h>
  14. #include <linux/module.h>
  15. #include <linux/mod_devicetable.h>
  16. #include <linux/platform_device.h>
  17. #include <linux/power_supply.h>
  18. #include <linux/regmap.h>
  19. #define MP2629_REG_INPUT_ILIM 0x00
  20. #define MP2629_REG_INPUT_VLIM 0x01
  21. #define MP2629_REG_CHARGE_CTRL 0x04
  22. #define MP2629_REG_CHARGE_ILIM 0x05
  23. #define MP2629_REG_PRECHARGE 0x06
  24. #define MP2629_REG_TERM_CURRENT 0x06
  25. #define MP2629_REG_CHARGE_VLIM 0x07
  26. #define MP2629_REG_TIMER_CTRL 0x08
  27. #define MP2629_REG_IMPEDANCE_COMP 0x09
  28. #define MP2629_REG_INTERRUPT 0x0b
  29. #define MP2629_REG_STATUS 0x0c
  30. #define MP2629_REG_FAULT 0x0d
  31. #define MP2629_MASK_INPUT_TYPE GENMASK(7, 5)
  32. #define MP2629_MASK_CHARGE_TYPE GENMASK(4, 3)
  33. #define MP2629_MASK_CHARGE_CTRL GENMASK(5, 4)
  34. #define MP2629_MASK_WDOG_CTRL GENMASK(5, 4)
  35. #define MP2629_MASK_IMPEDANCE GENMASK(7, 4)
  36. #define MP2629_INPUTSOURCE_CHANGE GENMASK(7, 5)
  37. #define MP2629_CHARGING_CHANGE GENMASK(4, 3)
  38. #define MP2629_FAULT_BATTERY BIT(3)
  39. #define MP2629_FAULT_THERMAL BIT(4)
  40. #define MP2629_FAULT_INPUT BIT(5)
  41. #define MP2629_FAULT_OTG BIT(6)
  42. #define MP2629_MAX_BATT_CAPACITY 100
  43. #define MP2629_PROPS(_idx, _min, _max, _step) \
  44. [_idx] = { \
  45. .min = _min, \
  46. .max = _max, \
  47. .step = _step, \
  48. }
  49. enum mp2629_source_type {
  50. MP2629_SOURCE_TYPE_NO_INPUT,
  51. MP2629_SOURCE_TYPE_NON_STD,
  52. MP2629_SOURCE_TYPE_SDP,
  53. MP2629_SOURCE_TYPE_CDP,
  54. MP2629_SOURCE_TYPE_DCP,
  55. MP2629_SOURCE_TYPE_OTG = 7,
  56. };
  57. enum mp2629_field {
  58. INPUT_ILIM,
  59. INPUT_VLIM,
  60. CHARGE_ILIM,
  61. CHARGE_VLIM,
  62. PRECHARGE,
  63. TERM_CURRENT,
  64. MP2629_MAX_FIELD
  65. };
  66. struct mp2629_charger {
  67. struct device *dev;
  68. int status;
  69. int fault;
  70. struct regmap *regmap;
  71. struct regmap_field *regmap_fields[MP2629_MAX_FIELD];
  72. struct mutex lock;
  73. struct power_supply *usb;
  74. struct power_supply *battery;
  75. struct iio_channel *iiochan[MP2629_ADC_CHAN_END];
  76. };
  77. struct mp2629_prop {
  78. int reg;
  79. int mask;
  80. int min;
  81. int max;
  82. int step;
  83. int shift;
  84. };
  85. static enum power_supply_usb_type mp2629_usb_types[] = {
  86. POWER_SUPPLY_USB_TYPE_SDP,
  87. POWER_SUPPLY_USB_TYPE_DCP,
  88. POWER_SUPPLY_USB_TYPE_CDP,
  89. POWER_SUPPLY_USB_TYPE_PD_DRP,
  90. POWER_SUPPLY_USB_TYPE_UNKNOWN
  91. };
  92. static enum power_supply_property mp2629_charger_usb_props[] = {
  93. POWER_SUPPLY_PROP_ONLINE,
  94. POWER_SUPPLY_PROP_USB_TYPE,
  95. POWER_SUPPLY_PROP_VOLTAGE_NOW,
  96. POWER_SUPPLY_PROP_CURRENT_NOW,
  97. POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
  98. POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
  99. };
  100. static enum power_supply_property mp2629_charger_bat_props[] = {
  101. POWER_SUPPLY_PROP_STATUS,
  102. POWER_SUPPLY_PROP_HEALTH,
  103. POWER_SUPPLY_PROP_CHARGE_TYPE,
  104. POWER_SUPPLY_PROP_VOLTAGE_NOW,
  105. POWER_SUPPLY_PROP_CURRENT_NOW,
  106. POWER_SUPPLY_PROP_CAPACITY,
  107. POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
  108. POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT,
  109. POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
  110. POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
  111. POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
  112. POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
  113. };
  114. static struct mp2629_prop props[] = {
  115. MP2629_PROPS(INPUT_ILIM, 100000, 3250000, 50000),
  116. MP2629_PROPS(INPUT_VLIM, 3800000, 5300000, 100000),
  117. MP2629_PROPS(CHARGE_ILIM, 320000, 4520000, 40000),
  118. MP2629_PROPS(CHARGE_VLIM, 3400000, 4670000, 10000),
  119. MP2629_PROPS(PRECHARGE, 120000, 720000, 40000),
  120. MP2629_PROPS(TERM_CURRENT, 80000, 680000, 40000),
  121. };
  122. static const struct reg_field mp2629_reg_fields[] = {
  123. [INPUT_ILIM] = REG_FIELD(MP2629_REG_INPUT_ILIM, 0, 5),
  124. [INPUT_VLIM] = REG_FIELD(MP2629_REG_INPUT_VLIM, 0, 3),
  125. [CHARGE_ILIM] = REG_FIELD(MP2629_REG_CHARGE_ILIM, 0, 6),
  126. [CHARGE_VLIM] = REG_FIELD(MP2629_REG_CHARGE_VLIM, 1, 7),
  127. [PRECHARGE] = REG_FIELD(MP2629_REG_PRECHARGE, 4, 7),
  128. [TERM_CURRENT] = REG_FIELD(MP2629_REG_TERM_CURRENT, 0, 3),
  129. };
  130. static char *adc_chan_name[] = {
  131. "mp2629-batt-volt",
  132. "mp2629-system-volt",
  133. "mp2629-input-volt",
  134. "mp2629-batt-current",
  135. "mp2629-input-current",
  136. };
  137. static int mp2629_read_adc(struct mp2629_charger *charger,
  138. enum mp2629_adc_chan ch,
  139. union power_supply_propval *val)
  140. {
  141. int ret;
  142. int chval;
  143. ret = iio_read_channel_processed(charger->iiochan[ch], &chval);
  144. if (ret)
  145. return ret;
  146. val->intval = chval * 1000;
  147. return 0;
  148. }
  149. static int mp2629_get_prop(struct mp2629_charger *charger,
  150. enum mp2629_field fld,
  151. union power_supply_propval *val)
  152. {
  153. int ret;
  154. unsigned int rval;
  155. ret = regmap_field_read(charger->regmap_fields[fld], &rval);
  156. if (ret)
  157. return ret;
  158. val->intval = rval * props[fld].step + props[fld].min;
  159. return 0;
  160. }
  161. static int mp2629_set_prop(struct mp2629_charger *charger,
  162. enum mp2629_field fld,
  163. const union power_supply_propval *val)
  164. {
  165. unsigned int rval;
  166. if (val->intval < props[fld].min || val->intval > props[fld].max)
  167. return -EINVAL;
  168. rval = (val->intval - props[fld].min) / props[fld].step;
  169. return regmap_field_write(charger->regmap_fields[fld], rval);
  170. }
  171. static int mp2629_get_battery_capacity(struct mp2629_charger *charger,
  172. union power_supply_propval *val)
  173. {
  174. union power_supply_propval vnow, vlim;
  175. int ret;
  176. ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, &vnow);
  177. if (ret)
  178. return ret;
  179. ret = mp2629_get_prop(charger, CHARGE_VLIM, &vlim);
  180. if (ret)
  181. return ret;
  182. val->intval = (vnow.intval * 100) / vlim.intval;
  183. val->intval = min(val->intval, MP2629_MAX_BATT_CAPACITY);
  184. return 0;
  185. }
  186. static int mp2629_charger_battery_get_prop(struct power_supply *psy,
  187. enum power_supply_property psp,
  188. union power_supply_propval *val)
  189. {
  190. struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
  191. unsigned int rval;
  192. int ret = 0;
  193. switch (psp) {
  194. case POWER_SUPPLY_PROP_VOLTAGE_NOW:
  195. ret = mp2629_read_adc(charger, MP2629_BATT_VOLT, val);
  196. break;
  197. case POWER_SUPPLY_PROP_CURRENT_NOW:
  198. ret = mp2629_read_adc(charger, MP2629_BATT_CURRENT, val);
  199. break;
  200. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
  201. val->intval = 4520000;
  202. break;
  203. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
  204. val->intval = 4670000;
  205. break;
  206. case POWER_SUPPLY_PROP_CAPACITY:
  207. ret = mp2629_get_battery_capacity(charger, val);
  208. break;
  209. case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
  210. ret = mp2629_get_prop(charger, TERM_CURRENT, val);
  211. break;
  212. case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
  213. ret = mp2629_get_prop(charger, PRECHARGE, val);
  214. break;
  215. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
  216. ret = mp2629_get_prop(charger, CHARGE_VLIM, val);
  217. break;
  218. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
  219. ret = mp2629_get_prop(charger, CHARGE_ILIM, val);
  220. break;
  221. case POWER_SUPPLY_PROP_HEALTH:
  222. if (!charger->fault)
  223. val->intval = POWER_SUPPLY_HEALTH_GOOD;
  224. if (MP2629_FAULT_BATTERY & charger->fault)
  225. val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
  226. else if (MP2629_FAULT_THERMAL & charger->fault)
  227. val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
  228. else if (MP2629_FAULT_INPUT & charger->fault)
  229. val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
  230. break;
  231. case POWER_SUPPLY_PROP_STATUS:
  232. ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
  233. if (ret)
  234. break;
  235. rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
  236. switch (rval) {
  237. case 0x00:
  238. val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
  239. break;
  240. case 0x01:
  241. case 0x10:
  242. val->intval = POWER_SUPPLY_STATUS_CHARGING;
  243. break;
  244. case 0x11:
  245. val->intval = POWER_SUPPLY_STATUS_FULL;
  246. }
  247. break;
  248. case POWER_SUPPLY_PROP_CHARGE_TYPE:
  249. ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
  250. if (ret)
  251. break;
  252. rval = (rval & MP2629_MASK_CHARGE_TYPE) >> 3;
  253. switch (rval) {
  254. case 0x00:
  255. val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
  256. break;
  257. case 0x01:
  258. val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
  259. break;
  260. case 0x10:
  261. val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
  262. break;
  263. default:
  264. val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
  265. }
  266. break;
  267. default:
  268. return -EINVAL;
  269. }
  270. return ret;
  271. }
  272. static int mp2629_charger_battery_set_prop(struct power_supply *psy,
  273. enum power_supply_property psp,
  274. const union power_supply_propval *val)
  275. {
  276. struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
  277. switch (psp) {
  278. case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT:
  279. return mp2629_set_prop(charger, TERM_CURRENT, val);
  280. case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
  281. return mp2629_set_prop(charger, PRECHARGE, val);
  282. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
  283. return mp2629_set_prop(charger, CHARGE_VLIM, val);
  284. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
  285. return mp2629_set_prop(charger, CHARGE_ILIM, val);
  286. default:
  287. return -EINVAL;
  288. }
  289. }
  290. static int mp2629_charger_usb_get_prop(struct power_supply *psy,
  291. enum power_supply_property psp,
  292. union power_supply_propval *val)
  293. {
  294. struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
  295. unsigned int rval;
  296. int ret;
  297. switch (psp) {
  298. case POWER_SUPPLY_PROP_ONLINE:
  299. ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
  300. if (ret)
  301. break;
  302. val->intval = !!(rval & MP2629_MASK_INPUT_TYPE);
  303. break;
  304. case POWER_SUPPLY_PROP_USB_TYPE:
  305. ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
  306. if (ret)
  307. break;
  308. rval = (rval & MP2629_MASK_INPUT_TYPE) >> 5;
  309. switch (rval) {
  310. case MP2629_SOURCE_TYPE_SDP:
  311. val->intval = POWER_SUPPLY_USB_TYPE_SDP;
  312. break;
  313. case MP2629_SOURCE_TYPE_CDP:
  314. val->intval = POWER_SUPPLY_USB_TYPE_CDP;
  315. break;
  316. case MP2629_SOURCE_TYPE_DCP:
  317. val->intval = POWER_SUPPLY_USB_TYPE_DCP;
  318. break;
  319. case MP2629_SOURCE_TYPE_OTG:
  320. val->intval = POWER_SUPPLY_USB_TYPE_PD_DRP;
  321. break;
  322. default:
  323. val->intval = POWER_SUPPLY_USB_TYPE_UNKNOWN;
  324. break;
  325. }
  326. break;
  327. case POWER_SUPPLY_PROP_VOLTAGE_NOW:
  328. ret = mp2629_read_adc(charger, MP2629_INPUT_VOLT, val);
  329. break;
  330. case POWER_SUPPLY_PROP_CURRENT_NOW:
  331. ret = mp2629_read_adc(charger, MP2629_INPUT_CURRENT, val);
  332. break;
  333. case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
  334. ret = mp2629_get_prop(charger, INPUT_VLIM, val);
  335. break;
  336. case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
  337. ret = mp2629_get_prop(charger, INPUT_ILIM, val);
  338. break;
  339. default:
  340. return -EINVAL;
  341. }
  342. return ret;
  343. }
  344. static int mp2629_charger_usb_set_prop(struct power_supply *psy,
  345. enum power_supply_property psp,
  346. const union power_supply_propval *val)
  347. {
  348. struct mp2629_charger *charger = dev_get_drvdata(psy->dev.parent);
  349. switch (psp) {
  350. case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT:
  351. return mp2629_set_prop(charger, INPUT_VLIM, val);
  352. case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
  353. return mp2629_set_prop(charger, INPUT_ILIM, val);
  354. default:
  355. return -EINVAL;
  356. }
  357. }
  358. static int mp2629_charger_battery_prop_writeable(struct power_supply *psy,
  359. enum power_supply_property psp)
  360. {
  361. return (psp == POWER_SUPPLY_PROP_PRECHARGE_CURRENT) ||
  362. (psp == POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT) ||
  363. (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT) ||
  364. (psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE);
  365. }
  366. static int mp2629_charger_usb_prop_writeable(struct power_supply *psy,
  367. enum power_supply_property psp)
  368. {
  369. return (psp == POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT) ||
  370. (psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT);
  371. }
  372. static irqreturn_t mp2629_irq_handler(int irq, void *dev_id)
  373. {
  374. struct mp2629_charger *charger = dev_id;
  375. unsigned int rval;
  376. int ret;
  377. mutex_lock(&charger->lock);
  378. ret = regmap_read(charger->regmap, MP2629_REG_FAULT, &rval);
  379. if (ret)
  380. goto unlock;
  381. if (rval) {
  382. charger->fault = rval;
  383. if (MP2629_FAULT_BATTERY & rval)
  384. dev_err(charger->dev, "Battery fault OVP\n");
  385. else if (MP2629_FAULT_THERMAL & rval)
  386. dev_err(charger->dev, "Thermal shutdown fault\n");
  387. else if (MP2629_FAULT_INPUT & rval)
  388. dev_err(charger->dev, "no input or input OVP\n");
  389. else if (MP2629_FAULT_OTG & rval)
  390. dev_err(charger->dev, "VIN overloaded\n");
  391. goto unlock;
  392. }
  393. ret = regmap_read(charger->regmap, MP2629_REG_STATUS, &rval);
  394. if (ret)
  395. goto unlock;
  396. if (rval & MP2629_INPUTSOURCE_CHANGE)
  397. power_supply_changed(charger->usb);
  398. else if (rval & MP2629_CHARGING_CHANGE)
  399. power_supply_changed(charger->battery);
  400. unlock:
  401. mutex_unlock(&charger->lock);
  402. return IRQ_HANDLED;
  403. }
  404. static const struct power_supply_desc mp2629_usb_desc = {
  405. .name = "mp2629_usb",
  406. .type = POWER_SUPPLY_TYPE_USB,
  407. .usb_types = mp2629_usb_types,
  408. .num_usb_types = ARRAY_SIZE(mp2629_usb_types),
  409. .properties = mp2629_charger_usb_props,
  410. .num_properties = ARRAY_SIZE(mp2629_charger_usb_props),
  411. .get_property = mp2629_charger_usb_get_prop,
  412. .set_property = mp2629_charger_usb_set_prop,
  413. .property_is_writeable = mp2629_charger_usb_prop_writeable,
  414. };
  415. static const struct power_supply_desc mp2629_battery_desc = {
  416. .name = "mp2629_battery",
  417. .type = POWER_SUPPLY_TYPE_BATTERY,
  418. .properties = mp2629_charger_bat_props,
  419. .num_properties = ARRAY_SIZE(mp2629_charger_bat_props),
  420. .get_property = mp2629_charger_battery_get_prop,
  421. .set_property = mp2629_charger_battery_set_prop,
  422. .property_is_writeable = mp2629_charger_battery_prop_writeable,
  423. };
  424. static ssize_t batt_impedance_compensation_show(struct device *dev,
  425. struct device_attribute *attr,
  426. char *buf)
  427. {
  428. struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
  429. unsigned int rval;
  430. int ret;
  431. ret = regmap_read(charger->regmap, MP2629_REG_IMPEDANCE_COMP, &rval);
  432. if (ret)
  433. return ret;
  434. rval = (rval >> 4) * 10;
  435. return sprintf(buf, "%d mohm\n", rval);
  436. }
  437. static ssize_t batt_impedance_compensation_store(struct device *dev,
  438. struct device_attribute *attr,
  439. const char *buf,
  440. size_t count)
  441. {
  442. struct mp2629_charger *charger = dev_get_drvdata(dev->parent);
  443. unsigned int val;
  444. int ret;
  445. ret = kstrtouint(buf, 10, &val);
  446. if (ret)
  447. return ret;
  448. if (val > 140)
  449. return -ERANGE;
  450. /* multiples of 10 mohm so round off */
  451. val = val / 10;
  452. ret = regmap_update_bits(charger->regmap, MP2629_REG_IMPEDANCE_COMP,
  453. MP2629_MASK_IMPEDANCE, val << 4);
  454. if (ret)
  455. return ret;
  456. return count;
  457. }
  458. static DEVICE_ATTR_RW(batt_impedance_compensation);
  459. static struct attribute *mp2629_charger_sysfs_attrs[] = {
  460. &dev_attr_batt_impedance_compensation.attr,
  461. NULL
  462. };
  463. ATTRIBUTE_GROUPS(mp2629_charger_sysfs);
  464. static void mp2629_charger_disable(void *data)
  465. {
  466. struct mp2629_charger *charger = data;
  467. regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
  468. MP2629_MASK_CHARGE_CTRL, 0);
  469. }
  470. static int mp2629_charger_probe(struct platform_device *pdev)
  471. {
  472. struct device *dev = &pdev->dev;
  473. struct mp2629_data *ddata = dev_get_drvdata(dev->parent);
  474. struct mp2629_charger *charger;
  475. struct power_supply_config psy_cfg = {};
  476. int ret, i, irq;
  477. charger = devm_kzalloc(dev, sizeof(*charger), GFP_KERNEL);
  478. if (!charger)
  479. return -ENOMEM;
  480. charger->regmap = ddata->regmap;
  481. charger->dev = dev;
  482. platform_set_drvdata(pdev, charger);
  483. irq = platform_get_irq_optional(to_platform_device(dev->parent), 0);
  484. if (irq < 0) {
  485. dev_err(dev, "get irq fail: %d\n", irq);
  486. return irq;
  487. }
  488. for (i = 0; i < MP2629_MAX_FIELD; i++) {
  489. charger->regmap_fields[i] = devm_regmap_field_alloc(dev,
  490. charger->regmap, mp2629_reg_fields[i]);
  491. if (IS_ERR(charger->regmap_fields[i])) {
  492. dev_err(dev, "regmap field alloc fail %d\n", i);
  493. return PTR_ERR(charger->regmap_fields[i]);
  494. }
  495. }
  496. for (i = 0; i < MP2629_ADC_CHAN_END; i++) {
  497. charger->iiochan[i] = devm_iio_channel_get(dev,
  498. adc_chan_name[i]);
  499. if (IS_ERR(charger->iiochan[i])) {
  500. dev_err(dev, "iio chan get %s err\n", adc_chan_name[i]);
  501. return PTR_ERR(charger->iiochan[i]);
  502. }
  503. }
  504. ret = devm_add_action_or_reset(dev, mp2629_charger_disable, charger);
  505. if (ret)
  506. return ret;
  507. charger->usb = devm_power_supply_register(dev, &mp2629_usb_desc, NULL);
  508. if (IS_ERR(charger->usb)) {
  509. dev_err(dev, "power supply register usb failed\n");
  510. return PTR_ERR(charger->usb);
  511. }
  512. psy_cfg.drv_data = charger;
  513. psy_cfg.attr_grp = mp2629_charger_sysfs_groups;
  514. charger->battery = devm_power_supply_register(dev,
  515. &mp2629_battery_desc, &psy_cfg);
  516. if (IS_ERR(charger->battery)) {
  517. dev_err(dev, "power supply register battery failed\n");
  518. return PTR_ERR(charger->battery);
  519. }
  520. ret = regmap_update_bits(charger->regmap, MP2629_REG_CHARGE_CTRL,
  521. MP2629_MASK_CHARGE_CTRL, BIT(4));
  522. if (ret) {
  523. dev_err(dev, "enable charge fail: %d\n", ret);
  524. return ret;
  525. }
  526. regmap_update_bits(charger->regmap, MP2629_REG_TIMER_CTRL,
  527. MP2629_MASK_WDOG_CTRL, 0);
  528. mutex_init(&charger->lock);
  529. ret = devm_request_threaded_irq(dev, irq, NULL, mp2629_irq_handler,
  530. IRQF_ONESHOT | IRQF_TRIGGER_RISING,
  531. "mp2629-charger", charger);
  532. if (ret) {
  533. dev_err(dev, "failed to request gpio IRQ\n");
  534. return ret;
  535. }
  536. regmap_update_bits(charger->regmap, MP2629_REG_INTERRUPT,
  537. GENMASK(6, 5), BIT(6) | BIT(5));
  538. return 0;
  539. }
  540. static const struct of_device_id mp2629_charger_of_match[] = {
  541. { .compatible = "mps,mp2629_charger"},
  542. {}
  543. };
  544. MODULE_DEVICE_TABLE(of, mp2629_charger_of_match);
  545. static struct platform_driver mp2629_charger_driver = {
  546. .driver = {
  547. .name = "mp2629_charger",
  548. .of_match_table = mp2629_charger_of_match,
  549. },
  550. .probe = mp2629_charger_probe,
  551. };
  552. module_platform_driver(mp2629_charger_driver);
  553. MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
  554. MODULE_DESCRIPTION("MP2629 Charger driver");
  555. MODULE_LICENSE("GPL");