bq2515x_charger.c 29 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. // BQ2515X Battery Charger Driver
  3. // Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/
  4. #include <linux/err.h>
  5. #include <linux/i2c.h>
  6. #include <linux/init.h>
  7. #include <linux/kernel.h>
  8. #include <linux/module.h>
  9. #include <linux/gpio/consumer.h>
  10. #include <linux/power_supply.h>
  11. #include <linux/regmap.h>
  12. #include <linux/types.h>
  13. #define BQ2515X_MANUFACTURER "Texas Instruments"
  14. #define BQ2515X_STAT0 0x00
  15. #define BQ2515X_STAT1 0x01
  16. #define BQ2515X_STAT2 0x02
  17. #define BQ2515X_FLAG0 0x03
  18. #define BQ2515X_FLAG1 0x04
  19. #define BQ2515X_FLAG2 0x05
  20. #define BQ2515X_FLAG3 0x06
  21. #define BQ2515X_MASK0 0x07
  22. #define BQ2515X_MASK1 0x08
  23. #define BQ2515X_MASK2 0x09
  24. #define BQ2515X_MASK3 0x0a
  25. #define BQ2515X_VBAT_CTRL 0x12
  26. #define BQ2515X_ICHG_CTRL 0x13
  27. #define BQ2515X_PCHRGCTRL 0x14
  28. #define BQ2515X_TERMCTRL 0x15
  29. #define BQ2515X_BUVLO 0x16
  30. #define BQ2515X_CHARGERCTRL0 0x17
  31. #define BQ2515X_CHARGERCTRL1 0x18
  32. #define BQ2515X_ILIMCTRL 0x19
  33. #define BQ2515X_LDOCTRL 0x1d
  34. #define BQ2515X_MRCTRL 0x30
  35. #define BQ2515X_ICCTRL0 0x35
  36. #define BQ2515X_ICCTRL1 0x36
  37. #define BQ2515X_ICCTRL2 0x37
  38. #define BQ2515X_ADCCTRL0 0x40
  39. #define BQ2515X_ADCCTRL1 0x41
  40. #define BQ2515X_ADC_VBAT_M 0x42
  41. #define BQ2515X_ADC_VBAT_L 0x43
  42. #define BQ2515X_ADC_TS_M 0x44
  43. #define BQ2515X_ADC_TS_L 0x45
  44. #define BQ2515X_ADC_ICHG_M 0x46
  45. #define BQ2515X_ADC_ICHG_L 0x47
  46. #define BQ2515X_ADC_ADCIN_M 0x48
  47. #define BQ2515X_ADC_ADCIN_L 0x49
  48. #define BQ2515X_ADC_VIN_M 0x4a
  49. #define BQ2515X_ADC_VIN_L 0x4b
  50. #define BQ2515X_ADC_PMID_M 0x4c
  51. #define BQ2515X_ADC_PMID_L 0x4d
  52. #define BQ2515X_ADC_IIN_M 0x4e
  53. #define BQ2515X_ADC_IIN_L 0x4f
  54. #define BQ2515X_ADC_COMP1_M 0x52
  55. #define BQ2515X_ADC_COMP1_L 0X53
  56. #define BQ2515X_ADC_COMP2_M 0X54
  57. #define BQ2515X_ADC_COMP2_L 0x55
  58. #define BQ2515X_ADC_COMP3_M 0x56
  59. #define BQ2515X_ADC_COMP3_L 0x57
  60. #define BQ2515X_ADC_READ_EN 0x58
  61. #define BQ2515X_TS_FASTCHGCTRL 0x61
  62. #define BQ2515X_TS_COLD 0x62
  63. #define BQ2515X_TS_COOL 0x63
  64. #define BQ2515X_TS_WARM 0x64
  65. #define BQ2515X_TS_HOT 0x65
  66. #define BQ2515X_DEVICE_ID 0x6f
  67. #define BQ2515X_DEFAULT_ICHG_UA 10000
  68. #define BQ25150_DEFAULT_ILIM_UA 100000
  69. #define BQ25155_DEFAULT_ILIM_UA 500000
  70. #define BQ2515X_DEFAULT_VBAT_REG_UV 4200000
  71. #define BQ2515X_DEFAULT_IPRECHARGE_UA 2500
  72. #define BQ2515X_DIVISOR 65536
  73. #define BQ2515X_VBAT_BASE_VOLT 3600000
  74. #define BQ2515X_VBAT_REG_MAX 4600000
  75. #define BQ2515X_VBAT_REG_MIN 3600000
  76. #define BQ2515X_VBAT_STEP_UV 10000
  77. #define BQ2515X_UV_FACTOR 1000000
  78. #define BQ2515X_VBAT_MULTIPLIER 6
  79. #define BQ2515X_ICHG_DIVISOR 52429
  80. #define BQ2515X_ICHG_CURR_STEP_THRESH_UA 318750
  81. #define BQ2515X_ICHG_MIN_UA 0
  82. #define BQ2515X_ICHG_MAX_UA 500000
  83. #define BQ2515X_ICHG_RNG_1B0_UA 1250
  84. #define BQ2515X_ICHG_RNG_1B1_UA 2500
  85. #define BQ2515X_VLOWV_SEL_1B0_UV 3000000
  86. #define BQ2515X_VLOWV_SEL_1B1_UV 2800000
  87. #define BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA 18750
  88. #define BQ2515X_PRECHRG_ICHRG_RNGE_3750_UA 37500
  89. #define BQ2515X_TWAKE2_MIN_US 1700000
  90. #define BQ2515X_TWAKE2_MAX_US 2300000
  91. #define BQ2515X_ILIM_150MA 0x2
  92. #define BQ2515X_ILIM_MASK 0x7
  93. #define BQ2515X_ILIM_MIN 50000
  94. #define BQ2515X_ILIM_MAX 600000
  95. #define BQ2515X_HEALTH_MASK 0xf
  96. #define BQ2515X_ICHGRNG_MASK 0x80
  97. #define BQ2515X_STAT0_MASK 0x0f
  98. #define BQ2515X_STAT1_MASK 0x1f
  99. #define BQ2515X_PRECHARGE_MASK 0x1f
  100. #define BQ2515X_TS_HOT_STAT BIT(0)
  101. #define BQ2515X_TS_WARM_STAT BIT(1)
  102. #define BQ2515X_TS_COOL_STAT BIT(2)
  103. #define BQ2515X_TS_COLD_STAT BIT(3)
  104. #define BQ2515X_SAFETY_TIMER_EXP BIT(5)
  105. #define BQ2515X_EN_VBAT_READ BIT(3)
  106. #define BQ2515X_EN_ICHG_READ BIT(5)
  107. #define BQ2515X_VIN_GOOD BIT(0)
  108. #define BQ2515X_CHRG_DONE BIT(5)
  109. #define BQ2515X_CV_CHRG_MODE BIT(6)
  110. #define BQ2515X_VIN_OVP_FAULT_STAT BIT(7)
  111. #define BQ2515X_WATCHDOG_DISABLE BIT(4)
  112. #define BQ2515X_ICHARGE_RANGE BIT(7)
  113. #define BQ2515X_VLOWV_SEL BIT(5)
  114. #define BQ2515X_CHARGER_DISABLE BIT(0)
  115. #define BQ2515X_HWRESET_14S_WD BIT(1)
  116. static const int bq2515x_ilim_lvl_values[] = {
  117. 50000, 100000, 150000, 200000, 300000, 400000, 500000, 600000
  118. };
  119. /**
  120. * struct bq2515x_init_data -
  121. * @ilim: input current limit
  122. * @ichg: fast charge current
  123. * @vbatreg: battery regulation voltage
  124. * @iprechg: precharge current
  125. */
  126. struct bq2515x_init_data {
  127. int ilim;
  128. int ichg;
  129. int vbatreg;
  130. int iprechg;
  131. };
  132. enum bq2515x_id {
  133. BQ25150,
  134. BQ25155,
  135. };
  136. /**
  137. * struct bq2515x_device -
  138. * @mains: mains properties
  139. * @battery: battery properties
  140. * @regmap: register map structure
  141. * @dev: device structure
  142. *
  143. * @reset_gpio: manual reset (MR) pin
  144. * @powerdown_gpio: low power mode pin
  145. * @ac_detect_gpio: power good (PG) pin
  146. * @ce_gpio: charge enable (CE) pin
  147. *
  148. * @model_name: string value describing device model
  149. * @device_id: value of device_id
  150. * @mains_online: boolean value indicating power supply online
  151. *
  152. * @init_data: charger initialization data structure
  153. */
  154. struct bq2515x_device {
  155. struct power_supply *mains;
  156. struct power_supply *battery;
  157. struct regmap *regmap;
  158. struct device *dev;
  159. struct gpio_desc *reset_gpio;
  160. struct gpio_desc *powerdown_gpio;
  161. struct gpio_desc *ac_detect_gpio;
  162. struct gpio_desc *ce_gpio;
  163. char model_name[I2C_NAME_SIZE];
  164. int device_id;
  165. bool mains_online;
  166. struct bq2515x_init_data init_data;
  167. };
  168. static const struct reg_default bq25150_reg_defaults[] = {
  169. {BQ2515X_FLAG0, 0x0},
  170. {BQ2515X_FLAG1, 0x0},
  171. {BQ2515X_FLAG2, 0x0},
  172. {BQ2515X_FLAG3, 0x0},
  173. {BQ2515X_MASK0, 0x0},
  174. {BQ2515X_MASK1, 0x0},
  175. {BQ2515X_MASK2, 0x71},
  176. {BQ2515X_MASK3, 0x0},
  177. {BQ2515X_VBAT_CTRL, 0x3C},
  178. {BQ2515X_ICHG_CTRL, 0x8},
  179. {BQ2515X_PCHRGCTRL, 0x2},
  180. {BQ2515X_TERMCTRL, 0x14},
  181. {BQ2515X_BUVLO, 0x0},
  182. {BQ2515X_CHARGERCTRL0, 0x82},
  183. {BQ2515X_CHARGERCTRL1, 0x42},
  184. {BQ2515X_ILIMCTRL, 0x1},
  185. {BQ2515X_LDOCTRL, 0xB0},
  186. {BQ2515X_MRCTRL, 0x2A},
  187. {BQ2515X_ICCTRL0, 0x10},
  188. {BQ2515X_ICCTRL1, 0x0},
  189. {BQ2515X_ICCTRL2, 0x0},
  190. {BQ2515X_ADCCTRL0, 0x2},
  191. {BQ2515X_ADCCTRL1, 0x40},
  192. {BQ2515X_ADC_COMP1_M, 0x23},
  193. {BQ2515X_ADC_COMP1_L, 0x20},
  194. {BQ2515X_ADC_COMP2_M, 0x38},
  195. {BQ2515X_ADC_COMP2_L, 0x90},
  196. {BQ2515X_ADC_COMP3_M, 0x0},
  197. {BQ2515X_ADC_COMP3_L, 0x0},
  198. {BQ2515X_ADC_READ_EN, 0x0},
  199. {BQ2515X_TS_FASTCHGCTRL, 0x34},
  200. {BQ2515X_TS_COLD, 0x7C},
  201. {BQ2515X_TS_COOL, 0x6D},
  202. {BQ2515X_TS_WARM, 0x38},
  203. {BQ2515X_TS_HOT, 0x27},
  204. {BQ2515X_DEVICE_ID, 0x20},
  205. };
  206. static const struct reg_default bq25155_reg_defaults[] = {
  207. {BQ2515X_FLAG0, 0x0},
  208. {BQ2515X_FLAG1, 0x0},
  209. {BQ2515X_FLAG2, 0x0},
  210. {BQ2515X_FLAG3, 0x0},
  211. {BQ2515X_MASK0, 0x0},
  212. {BQ2515X_MASK1, 0x0},
  213. {BQ2515X_MASK2, 0x71},
  214. {BQ2515X_MASK3, 0x0},
  215. {BQ2515X_VBAT_CTRL, 0x3C},
  216. {BQ2515X_ICHG_CTRL, 0x8},
  217. {BQ2515X_PCHRGCTRL, 0x2},
  218. {BQ2515X_TERMCTRL, 0x14},
  219. {BQ2515X_BUVLO, 0x0},
  220. {BQ2515X_CHARGERCTRL0, 0x82},
  221. {BQ2515X_CHARGERCTRL1, 0xC2},
  222. {BQ2515X_ILIMCTRL, 0x6},
  223. {BQ2515X_LDOCTRL, 0xB0},
  224. {BQ2515X_MRCTRL, 0x2A},
  225. {BQ2515X_ICCTRL0, 0x10},
  226. {BQ2515X_ICCTRL1, 0x0},
  227. {BQ2515X_ICCTRL2, 0x40},
  228. {BQ2515X_ADCCTRL0, 0x2},
  229. {BQ2515X_ADCCTRL1, 0x40},
  230. {BQ2515X_ADC_COMP1_M, 0x23},
  231. {BQ2515X_ADC_COMP1_L, 0x20},
  232. {BQ2515X_ADC_COMP2_M, 0x38},
  233. {BQ2515X_ADC_COMP2_L, 0x90},
  234. {BQ2515X_ADC_COMP3_M, 0x0},
  235. {BQ2515X_ADC_COMP3_L, 0x0},
  236. {BQ2515X_ADC_READ_EN, 0x0},
  237. {BQ2515X_TS_FASTCHGCTRL, 0x34},
  238. {BQ2515X_TS_COLD, 0x7C},
  239. {BQ2515X_TS_COOL, 0x6D},
  240. {BQ2515X_TS_WARM, 0x38},
  241. {BQ2515X_TS_HOT, 0x27},
  242. {BQ2515X_DEVICE_ID, 0x35},
  243. };
  244. static int bq2515x_wake_up(struct bq2515x_device *bq2515x)
  245. {
  246. int ret;
  247. int val;
  248. /* Read the STAT register if we can read it then the device is out
  249. * of ship mode. If the register cannot be read then attempt to wake
  250. * it up and enable the ADC.
  251. */
  252. ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val);
  253. if (ret)
  254. return ret;
  255. /* Need to toggle LP and bring device out of ship mode. The device
  256. * will exit the ship mode when the MR pin is held low for at least
  257. * t_WAKE2 as shown in section 8.3.7.1 of the datasheet.
  258. */
  259. gpiod_set_value_cansleep(bq2515x->powerdown_gpio, 0);
  260. gpiod_set_value_cansleep(bq2515x->reset_gpio, 0);
  261. usleep_range(BQ2515X_TWAKE2_MIN_US, BQ2515X_TWAKE2_MAX_US);
  262. gpiod_set_value_cansleep(bq2515x->reset_gpio, 1);
  263. return regmap_write(bq2515x->regmap, BQ2515X_ADC_READ_EN,
  264. (BQ2515X_EN_VBAT_READ | BQ2515X_EN_ICHG_READ));
  265. }
  266. static int bq2515x_update_ps_status(struct bq2515x_device *bq2515x)
  267. {
  268. bool dc = false;
  269. unsigned int val;
  270. int ret;
  271. if (bq2515x->ac_detect_gpio)
  272. val = gpiod_get_value_cansleep(bq2515x->ac_detect_gpio);
  273. else {
  274. ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &val);
  275. if (ret)
  276. return ret;
  277. }
  278. dc = val & BQ2515X_VIN_GOOD;
  279. ret = bq2515x->mains_online != dc;
  280. bq2515x->mains_online = dc;
  281. return ret;
  282. }
  283. static int bq2515x_disable_watchdog_timers(struct bq2515x_device *bq2515x)
  284. {
  285. int ret;
  286. ret = regmap_update_bits(bq2515x->regmap, BQ2515X_CHARGERCTRL0,
  287. BQ2515X_WATCHDOG_DISABLE, BQ2515X_WATCHDOG_DISABLE);
  288. if (ret)
  289. return ret;
  290. return regmap_update_bits(bq2515x->regmap, BQ2515X_ICCTRL2,
  291. BQ2515X_HWRESET_14S_WD, 0);
  292. }
  293. static int bq2515x_get_battery_voltage_now(struct bq2515x_device *bq2515x)
  294. {
  295. int ret;
  296. int vbat_msb;
  297. int vbat_lsb;
  298. uint32_t vbat_measurement;
  299. if (!bq2515x->mains_online)
  300. bq2515x_wake_up(bq2515x);
  301. ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_M, &vbat_msb);
  302. if (ret)
  303. return ret;
  304. ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_VBAT_L, &vbat_lsb);
  305. if (ret)
  306. return ret;
  307. vbat_measurement = (vbat_msb << 8) | vbat_lsb;
  308. return vbat_measurement * (BQ2515X_UV_FACTOR / BQ2515X_DIVISOR) *
  309. BQ2515X_VBAT_MULTIPLIER;
  310. }
  311. static int bq2515x_get_battery_current_now(struct bq2515x_device *bq2515x)
  312. {
  313. int ret;
  314. int ichg_msb;
  315. int ichg_lsb;
  316. uint32_t ichg_measurement;
  317. u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
  318. unsigned int ichg_reg_code, reg_code;
  319. unsigned int icharge_range = 0, pchrgctrl;
  320. unsigned int buvlo, vlowv_sel, vlowv = BQ2515X_VLOWV_SEL_1B0_UV;
  321. if (!bq2515x->mains_online)
  322. return -ENODATA;
  323. ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_ICHG_M, &ichg_msb);
  324. if (ret)
  325. return ret;
  326. ret = regmap_read(bq2515x->regmap, BQ2515X_ADC_ICHG_L, &ichg_lsb);
  327. if (ret)
  328. return ret;
  329. ichg_measurement = (ichg_msb << 8) | ichg_lsb;
  330. ret = regmap_read(bq2515x->regmap, BQ2515X_BUVLO, &buvlo);
  331. if (ret)
  332. return ret;
  333. vlowv_sel = buvlo & BQ2515X_VLOWV_SEL;
  334. if (vlowv_sel)
  335. vlowv = BQ2515X_VLOWV_SEL_1B1_UV;
  336. if (bq2515x_get_battery_voltage_now(bq2515x) < vlowv) {
  337. ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL,
  338. &pchrgctrl);
  339. if (ret)
  340. return ret;
  341. reg_code = pchrgctrl & BQ2515X_PRECHARGE_MASK;
  342. } else {
  343. ret = regmap_read(bq2515x->regmap, BQ2515X_ICHG_CTRL,
  344. &ichg_reg_code);
  345. if (ret)
  346. return ret;
  347. reg_code = ichg_reg_code;
  348. }
  349. ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
  350. if (ret)
  351. return ret;
  352. icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
  353. if (icharge_range)
  354. ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
  355. return reg_code * (ichg_multiplier * ichg_measurement /
  356. BQ2515X_ICHG_DIVISOR);
  357. }
  358. static bool bq2515x_get_charge_disable(struct bq2515x_device *bq2515x)
  359. {
  360. int ret;
  361. int ce_pin;
  362. int icctrl2;
  363. int charger_disable;
  364. ce_pin = gpiod_get_value_cansleep(bq2515x->ce_gpio);
  365. ret = regmap_read(bq2515x->regmap, BQ2515X_ICCTRL2, &icctrl2);
  366. if (ret)
  367. return ret;
  368. charger_disable = icctrl2 & BQ2515X_CHARGER_DISABLE;
  369. if (charger_disable || ce_pin)
  370. return true;
  371. return false;
  372. }
  373. static int bq2515x_set_charge_disable(struct bq2515x_device *bq2515x, int val)
  374. {
  375. gpiod_set_value_cansleep(bq2515x->ce_gpio, val);
  376. return regmap_update_bits(bq2515x->regmap, BQ2515X_ICCTRL2,
  377. BQ2515X_CHARGER_DISABLE, val);
  378. }
  379. static int bq2515x_get_const_charge_current(struct bq2515x_device *bq2515x)
  380. {
  381. int ret;
  382. u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
  383. unsigned int ichg_reg_code;
  384. unsigned int pchrgctrl;
  385. unsigned int icharge_range;
  386. ret = regmap_read(bq2515x->regmap, BQ2515X_ICHG_CTRL, &ichg_reg_code);
  387. if (ret)
  388. return ret;
  389. ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
  390. if (ret)
  391. return ret;
  392. icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
  393. if (icharge_range)
  394. ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
  395. return ichg_reg_code * ichg_multiplier;
  396. }
  397. static int bq2515x_set_const_charge_current(struct bq2515x_device *bq2515x,
  398. int val)
  399. {
  400. int ret;
  401. unsigned int ichg_reg_code;
  402. u16 ichg_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
  403. unsigned int icharge_range = 0;
  404. if (val > BQ2515X_ICHG_MAX_UA || val < BQ2515X_ICHG_MIN_UA)
  405. return -EINVAL;
  406. if (val > BQ2515X_ICHG_CURR_STEP_THRESH_UA) {
  407. ichg_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
  408. icharge_range = BQ2515X_ICHARGE_RANGE;
  409. }
  410. bq2515x_set_charge_disable(bq2515x, 1);
  411. ret = regmap_update_bits(bq2515x->regmap, BQ2515X_PCHRGCTRL,
  412. BQ2515X_ICHARGE_RANGE, icharge_range);
  413. if (ret)
  414. return ret;
  415. ichg_reg_code = val / ichg_multiplier;
  416. ret = regmap_write(bq2515x->regmap, BQ2515X_ICHG_CTRL, ichg_reg_code);
  417. if (ret)
  418. return ret;
  419. return bq2515x_set_charge_disable(bq2515x, 0);
  420. }
  421. static int bq2515x_get_precharge_current(struct bq2515x_device *bq2515x)
  422. {
  423. int ret;
  424. unsigned int pchrgctrl;
  425. unsigned int icharge_range;
  426. u16 precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
  427. unsigned int precharge_reg_code;
  428. ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
  429. if (ret)
  430. return ret;
  431. icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
  432. if (icharge_range)
  433. precharge_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
  434. precharge_reg_code = pchrgctrl & BQ2515X_PRECHARGE_MASK;
  435. return precharge_reg_code * precharge_multiplier;
  436. }
  437. static int bq2515x_set_precharge_current(struct bq2515x_device *bq2515x,
  438. int val)
  439. {
  440. int ret;
  441. unsigned int pchrgctrl;
  442. unsigned int icharge_range;
  443. unsigned int precharge_reg_code;
  444. unsigned int precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
  445. unsigned int precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA;
  446. ret = regmap_read(bq2515x->regmap, BQ2515X_PCHRGCTRL, &pchrgctrl);
  447. if (ret)
  448. return ret;
  449. icharge_range = pchrgctrl & BQ2515X_ICHARGE_RANGE;
  450. if (icharge_range) {
  451. precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_3750_UA;
  452. precharge_multiplier = BQ2515X_ICHG_RNG_1B1_UA;
  453. } else {
  454. precharge_max_ua = BQ2515X_PRECHRG_ICHRG_RNGE_1875_UA;
  455. precharge_multiplier = BQ2515X_ICHG_RNG_1B0_UA;
  456. }
  457. if (val > precharge_max_ua || val < BQ2515X_ICHG_MIN_UA)
  458. return -EINVAL;
  459. precharge_reg_code = val / precharge_multiplier;
  460. ret = bq2515x_set_charge_disable(bq2515x, 1);
  461. if (ret)
  462. return ret;
  463. ret = regmap_update_bits(bq2515x->regmap, BQ2515X_PCHRGCTRL,
  464. BQ2515X_PRECHARGE_MASK, precharge_reg_code);
  465. if (ret)
  466. return ret;
  467. return bq2515x_set_charge_disable(bq2515x, 0);
  468. }
  469. static int bq2515x_charging_status(struct bq2515x_device *bq2515x,
  470. union power_supply_propval *val)
  471. {
  472. bool status0_no_fault;
  473. bool status1_no_fault;
  474. bool ce_status;
  475. bool charge_done;
  476. unsigned int status;
  477. int ret;
  478. if (!bq2515x->mains_online) {
  479. val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
  480. return 0;
  481. }
  482. ret = regmap_read(bq2515x->regmap, BQ2515X_STAT0, &status);
  483. if (ret)
  484. return ret;
  485. /*
  486. * The code block below is used to determine if any faults from the
  487. * STAT0 register are disbaling charging or if the charge has completed
  488. * according to the CHARGE_DONE_STAT bit.
  489. */
  490. if (((status & BQ2515X_STAT0_MASK) == true) &
  491. ((status & BQ2515X_CHRG_DONE) == false)) {
  492. status0_no_fault = true;
  493. charge_done = false;
  494. } else if (status & BQ2515X_CHRG_DONE) {
  495. charge_done = true;
  496. status0_no_fault = false;
  497. } else {
  498. status0_no_fault = false;
  499. charge_done = false;
  500. }
  501. ret = regmap_read(bq2515x->regmap, BQ2515X_STAT1, &status);
  502. if (ret)
  503. return ret;
  504. /*
  505. * The code block below is used to determine if any faults from the
  506. * STAT1 register are disbaling charging
  507. */
  508. if ((status & BQ2515X_STAT1_MASK) == false)
  509. status1_no_fault = true;
  510. else
  511. status1_no_fault = false;
  512. ce_status = (!bq2515x_get_charge_disable(bq2515x));
  513. /*
  514. * If there are no faults and charging is enabled, then status is
  515. * charging. Otherwise, if charging is complete, then status is full.
  516. * Otherwise, if a fault exists or charging is disabled, then status is
  517. * not charging
  518. */
  519. if (status0_no_fault & status1_no_fault & ce_status)
  520. val->intval = POWER_SUPPLY_STATUS_CHARGING;
  521. else if (charge_done)
  522. val->intval = POWER_SUPPLY_STATUS_FULL;
  523. else if (!(status0_no_fault & status1_no_fault & ce_status))
  524. val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
  525. return 0;
  526. }
  527. static int bq2515x_get_batt_reg(struct bq2515x_device *bq2515x)
  528. {
  529. int vbat_reg_code;
  530. int ret;
  531. ret = regmap_read(bq2515x->regmap, BQ2515X_VBAT_CTRL, &vbat_reg_code);
  532. if (ret)
  533. return ret;
  534. return BQ2515X_VBAT_BASE_VOLT + vbat_reg_code * BQ2515X_VBAT_STEP_UV;
  535. }
  536. static int bq2515x_set_batt_reg(struct bq2515x_device *bq2515x, int val)
  537. {
  538. int vbat_reg_code;
  539. if (val > BQ2515X_VBAT_REG_MAX || val < BQ2515X_VBAT_REG_MIN)
  540. return -EINVAL;
  541. vbat_reg_code = (val - BQ2515X_VBAT_BASE_VOLT) / BQ2515X_VBAT_STEP_UV;
  542. return regmap_write(bq2515x->regmap, BQ2515X_VBAT_CTRL, vbat_reg_code);
  543. }
  544. static int bq2515x_get_ilim_lvl(struct bq2515x_device *bq2515x)
  545. {
  546. int ret;
  547. int ilimctrl;
  548. ret = regmap_read(bq2515x->regmap, BQ2515X_ILIMCTRL, &ilimctrl);
  549. if (ret)
  550. return ret;
  551. return bq2515x_ilim_lvl_values[ilimctrl & BQ2515X_ILIM_MASK];
  552. }
  553. static int bq2515x_set_ilim_lvl(struct bq2515x_device *bq2515x, int val)
  554. {
  555. int i = 0;
  556. unsigned int array_size = ARRAY_SIZE(bq2515x_ilim_lvl_values);
  557. for (i = array_size - 1; i > 0; i--) {
  558. if (val >= bq2515x_ilim_lvl_values[i])
  559. break;
  560. }
  561. return regmap_write(bq2515x->regmap, BQ2515X_ILIMCTRL, i);
  562. }
  563. static int bq2515x_power_supply_property_is_writeable(struct power_supply *psy,
  564. enum power_supply_property prop)
  565. {
  566. switch (prop) {
  567. case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
  568. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
  569. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
  570. case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
  571. return true;
  572. default:
  573. return false;
  574. }
  575. }
  576. static int bq2515x_charger_get_health(struct bq2515x_device *bq2515x,
  577. union power_supply_propval *val)
  578. {
  579. int health = POWER_SUPPLY_HEALTH_GOOD;
  580. int ret;
  581. unsigned int stat1;
  582. unsigned int flag3;
  583. if (!bq2515x->mains_online)
  584. bq2515x_wake_up(bq2515x);
  585. ret = regmap_read(bq2515x->regmap, BQ2515X_FLAG3, &flag3);
  586. if (ret)
  587. return ret;
  588. ret = regmap_read(bq2515x->regmap, BQ2515X_STAT1, &stat1);
  589. if (ret)
  590. return ret;
  591. if (stat1 & BQ2515X_HEALTH_MASK) {
  592. switch (stat1 & BQ2515X_HEALTH_MASK) {
  593. case BQ2515X_TS_HOT_STAT:
  594. health = POWER_SUPPLY_HEALTH_HOT;
  595. break;
  596. case BQ2515X_TS_WARM_STAT:
  597. health = POWER_SUPPLY_HEALTH_WARM;
  598. break;
  599. case BQ2515X_TS_COOL_STAT:
  600. health = POWER_SUPPLY_HEALTH_COOL;
  601. break;
  602. case BQ2515X_TS_COLD_STAT:
  603. health = POWER_SUPPLY_HEALTH_COLD;
  604. break;
  605. default:
  606. health = POWER_SUPPLY_HEALTH_UNKNOWN;
  607. break;
  608. }
  609. }
  610. if (stat1 & BQ2515X_VIN_OVP_FAULT_STAT)
  611. health = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
  612. if (flag3 & BQ2515X_SAFETY_TIMER_EXP)
  613. health = POWER_SUPPLY_HEALTH_SAFETY_TIMER_EXPIRE;
  614. val->intval = health;
  615. return 0;
  616. }
  617. static int bq2515x_mains_set_property(struct power_supply *psy,
  618. enum power_supply_property prop,
  619. const union power_supply_propval *val)
  620. {
  621. struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
  622. int ret;
  623. switch (prop) {
  624. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
  625. ret = bq2515x_set_batt_reg(bq2515x, val->intval);
  626. break;
  627. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
  628. ret = bq2515x_set_const_charge_current(bq2515x, val->intval);
  629. break;
  630. case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
  631. ret = bq2515x_set_ilim_lvl(bq2515x, val->intval);
  632. break;
  633. case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
  634. ret = bq2515x_set_precharge_current(bq2515x, val->intval);
  635. break;
  636. default:
  637. return -EINVAL;
  638. }
  639. return ret;
  640. }
  641. static int bq2515x_mains_get_property(struct power_supply *psy,
  642. enum power_supply_property prop,
  643. union power_supply_propval *val)
  644. {
  645. struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
  646. int ret = 0;
  647. switch (prop) {
  648. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
  649. ret = bq2515x_get_const_charge_current(bq2515x);
  650. if (ret < 0)
  651. return ret;
  652. val->intval = ret;
  653. break;
  654. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
  655. ret = bq2515x_get_batt_reg(bq2515x);
  656. if (ret < 0)
  657. return ret;
  658. val->intval = ret;
  659. break;
  660. case POWER_SUPPLY_PROP_PRECHARGE_CURRENT:
  661. ret = bq2515x_get_precharge_current(bq2515x);
  662. if (ret < 0)
  663. return ret;
  664. val->intval = ret;
  665. break;
  666. case POWER_SUPPLY_PROP_ONLINE:
  667. val->intval = bq2515x->mains_online;
  668. break;
  669. case POWER_SUPPLY_PROP_HEALTH:
  670. ret = bq2515x_charger_get_health(bq2515x, val);
  671. if (ret)
  672. val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
  673. break;
  674. case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
  675. ret = bq2515x_get_ilim_lvl(bq2515x);
  676. if (ret < 0)
  677. return ret;
  678. val->intval = ret;
  679. break;
  680. case POWER_SUPPLY_PROP_MODEL_NAME:
  681. val->strval = bq2515x->model_name;
  682. break;
  683. case POWER_SUPPLY_PROP_MANUFACTURER:
  684. val->strval = BQ2515X_MANUFACTURER;
  685. break;
  686. case POWER_SUPPLY_PROP_STATUS:
  687. ret = bq2515x_charging_status(bq2515x, val);
  688. if (ret)
  689. return ret;
  690. break;
  691. default:
  692. return -EINVAL;
  693. }
  694. return ret;
  695. }
  696. static int bq2515x_battery_get_property(struct power_supply *psy,
  697. enum power_supply_property prop,
  698. union power_supply_propval *val)
  699. {
  700. struct bq2515x_device *bq2515x = power_supply_get_drvdata(psy);
  701. int ret;
  702. ret = bq2515x_update_ps_status(bq2515x);
  703. if (ret)
  704. return ret;
  705. switch (prop) {
  706. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX:
  707. ret = bq2515x->init_data.vbatreg;
  708. if (ret < 0)
  709. return ret;
  710. val->intval = ret;
  711. break;
  712. case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
  713. ret = bq2515x->init_data.ichg;
  714. if (ret < 0)
  715. return ret;
  716. val->intval = ret;
  717. break;
  718. case POWER_SUPPLY_PROP_VOLTAGE_NOW:
  719. ret = bq2515x_get_battery_voltage_now(bq2515x);
  720. if (ret < 0)
  721. return ret;
  722. val->intval = ret;
  723. break;
  724. case POWER_SUPPLY_PROP_CURRENT_NOW:
  725. ret = bq2515x_get_battery_current_now(bq2515x);
  726. if (ret < 0)
  727. return ret;
  728. val->intval = ret;
  729. break;
  730. default:
  731. return -EINVAL;
  732. }
  733. return 0;
  734. }
  735. static const enum power_supply_property bq2515x_battery_properties[] = {
  736. POWER_SUPPLY_PROP_VOLTAGE_NOW,
  737. POWER_SUPPLY_PROP_CURRENT_NOW,
  738. POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
  739. POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX,
  740. };
  741. static const enum power_supply_property bq2515x_mains_properties[] = {
  742. POWER_SUPPLY_PROP_ONLINE,
  743. POWER_SUPPLY_PROP_STATUS,
  744. POWER_SUPPLY_PROP_HEALTH,
  745. POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
  746. POWER_SUPPLY_PROP_MODEL_NAME,
  747. POWER_SUPPLY_PROP_MANUFACTURER,
  748. POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
  749. POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
  750. POWER_SUPPLY_PROP_PRECHARGE_CURRENT,
  751. };
  752. static const struct power_supply_desc bq2515x_mains_desc = {
  753. .name = "bq2515x-mains",
  754. .type = POWER_SUPPLY_TYPE_MAINS,
  755. .get_property = bq2515x_mains_get_property,
  756. .set_property = bq2515x_mains_set_property,
  757. .properties = bq2515x_mains_properties,
  758. .num_properties = ARRAY_SIZE(bq2515x_mains_properties),
  759. .property_is_writeable = bq2515x_power_supply_property_is_writeable,
  760. };
  761. static const struct power_supply_desc bq2515x_battery_desc = {
  762. .name = "bq2515x-battery",
  763. .type = POWER_SUPPLY_TYPE_BATTERY,
  764. .get_property = bq2515x_battery_get_property,
  765. .properties = bq2515x_battery_properties,
  766. .num_properties = ARRAY_SIZE(bq2515x_battery_properties),
  767. .property_is_writeable = bq2515x_power_supply_property_is_writeable,
  768. };
  769. static int bq2515x_power_supply_register(struct bq2515x_device *bq2515x,
  770. struct device *dev, struct power_supply_config psy_cfg)
  771. {
  772. bq2515x->mains = devm_power_supply_register(bq2515x->dev,
  773. &bq2515x_mains_desc,
  774. &psy_cfg);
  775. if (IS_ERR(bq2515x->mains))
  776. return -EINVAL;
  777. bq2515x->battery = devm_power_supply_register(bq2515x->dev,
  778. &bq2515x_battery_desc,
  779. &psy_cfg);
  780. if (IS_ERR(bq2515x->battery))
  781. return -EINVAL;
  782. return 0;
  783. }
  784. static int bq2515x_hw_init(struct bq2515x_device *bq2515x)
  785. {
  786. int ret;
  787. struct power_supply_battery_info bat_info = { };
  788. ret = bq2515x_disable_watchdog_timers(bq2515x);
  789. if (ret)
  790. return ret;
  791. if (bq2515x->init_data.ilim) {
  792. ret = bq2515x_set_ilim_lvl(bq2515x, bq2515x->init_data.ilim);
  793. if (ret)
  794. return ret;
  795. }
  796. ret = power_supply_get_battery_info(bq2515x->mains, &bat_info);
  797. if (ret) {
  798. dev_warn(bq2515x->dev, "battery info missing, default values will be applied\n");
  799. bq2515x->init_data.ichg = BQ2515X_DEFAULT_ICHG_UA;
  800. bq2515x->init_data.vbatreg = BQ2515X_DEFAULT_VBAT_REG_UV;
  801. bq2515x->init_data.iprechg = BQ2515X_DEFAULT_IPRECHARGE_UA;
  802. } else {
  803. bq2515x->init_data.ichg =
  804. bat_info.constant_charge_current_max_ua;
  805. bq2515x->init_data.vbatreg =
  806. bat_info.constant_charge_voltage_max_uv;
  807. bq2515x->init_data.iprechg =
  808. bat_info.precharge_current_ua;
  809. }
  810. ret = bq2515x_set_const_charge_current(bq2515x,
  811. bq2515x->init_data.ichg);
  812. if (ret)
  813. return ret;
  814. ret = bq2515x_set_batt_reg(bq2515x, bq2515x->init_data.vbatreg);
  815. if (ret)
  816. return ret;
  817. return bq2515x_set_precharge_current(bq2515x,
  818. bq2515x->init_data.iprechg);
  819. }
  820. static int bq2515x_read_properties(struct bq2515x_device *bq2515x)
  821. {
  822. int ret;
  823. ret = device_property_read_u32(bq2515x->dev,
  824. "input-current-limit-microamp",
  825. &bq2515x->init_data.ilim);
  826. if (ret) {
  827. switch (bq2515x->device_id) {
  828. case BQ25150:
  829. bq2515x->init_data.ilim = BQ25150_DEFAULT_ILIM_UA;
  830. break;
  831. case BQ25155:
  832. bq2515x->init_data.ilim = BQ25155_DEFAULT_ILIM_UA;
  833. break;
  834. }
  835. }
  836. bq2515x->ac_detect_gpio = devm_gpiod_get_optional(bq2515x->dev,
  837. "ac-detect", GPIOD_IN);
  838. if (IS_ERR(bq2515x->ac_detect_gpio)) {
  839. ret = PTR_ERR(bq2515x->ac_detect_gpio);
  840. dev_err(bq2515x->dev, "Failed to get ac detect");
  841. return ret;
  842. }
  843. bq2515x->reset_gpio = devm_gpiod_get_optional(bq2515x->dev,
  844. "reset", GPIOD_OUT_LOW);
  845. if (IS_ERR(bq2515x->reset_gpio)) {
  846. ret = PTR_ERR(bq2515x->reset_gpio);
  847. dev_err(bq2515x->dev, "Failed to get reset");
  848. return ret;
  849. }
  850. bq2515x->powerdown_gpio = devm_gpiod_get_optional(bq2515x->dev,
  851. "powerdown", GPIOD_OUT_LOW);
  852. if (IS_ERR(bq2515x->powerdown_gpio)) {
  853. ret = PTR_ERR(bq2515x->powerdown_gpio);
  854. dev_err(bq2515x->dev, "Failed to get powerdown");
  855. return ret;
  856. }
  857. bq2515x->ce_gpio = devm_gpiod_get_optional(bq2515x->dev,
  858. "charge-enable",
  859. GPIOD_OUT_LOW);
  860. if (IS_ERR(bq2515x->ce_gpio)) {
  861. ret = PTR_ERR(bq2515x->ce_gpio);
  862. dev_err(bq2515x->dev, "Failed to get ce");
  863. return ret;
  864. }
  865. return 0;
  866. }
  867. static bool bq2515x_volatile_register(struct device *dev, unsigned int reg)
  868. {
  869. switch (reg) {
  870. case BQ2515X_STAT0 ... BQ2515X_FLAG3:
  871. case BQ2515X_ADC_VBAT_M ... BQ2515X_ADC_IIN_L:
  872. return true;
  873. default:
  874. return false;
  875. }
  876. }
  877. static const struct regmap_config bq25150_regmap_config = {
  878. .reg_bits = 8,
  879. .val_bits = 8,
  880. .max_register = BQ2515X_DEVICE_ID,
  881. .reg_defaults = bq25150_reg_defaults,
  882. .num_reg_defaults = ARRAY_SIZE(bq25150_reg_defaults),
  883. .cache_type = REGCACHE_RBTREE,
  884. .volatile_reg = bq2515x_volatile_register,
  885. };
  886. static const struct regmap_config bq25155_regmap_config = {
  887. .reg_bits = 8,
  888. .val_bits = 8,
  889. .max_register = BQ2515X_DEVICE_ID,
  890. .reg_defaults = bq25155_reg_defaults,
  891. .num_reg_defaults = ARRAY_SIZE(bq25155_reg_defaults),
  892. .cache_type = REGCACHE_RBTREE,
  893. .volatile_reg = bq2515x_volatile_register,
  894. };
  895. static int bq2515x_probe(struct i2c_client *client,
  896. const struct i2c_device_id *id)
  897. {
  898. struct device *dev = &client->dev;
  899. struct bq2515x_device *bq2515x;
  900. struct power_supply_config charger_cfg = {};
  901. int ret;
  902. bq2515x = devm_kzalloc(dev, sizeof(*bq2515x), GFP_KERNEL);
  903. if (!bq2515x)
  904. return -ENOMEM;
  905. bq2515x->dev = dev;
  906. strncpy(bq2515x->model_name, id->name, I2C_NAME_SIZE);
  907. bq2515x->device_id = id->driver_data;
  908. switch (bq2515x->device_id) {
  909. case BQ25150:
  910. bq2515x->regmap = devm_regmap_init_i2c(client,
  911. &bq25150_regmap_config);
  912. break;
  913. case BQ25155:
  914. bq2515x->regmap = devm_regmap_init_i2c(client,
  915. &bq25155_regmap_config);
  916. break;
  917. }
  918. if (IS_ERR(bq2515x->regmap)) {
  919. dev_err(dev, "failed to allocate register map\n");
  920. return PTR_ERR(bq2515x->regmap);
  921. }
  922. i2c_set_clientdata(client, bq2515x);
  923. charger_cfg.drv_data = bq2515x;
  924. charger_cfg.of_node = dev->of_node;
  925. ret = bq2515x_read_properties(bq2515x);
  926. if (ret) {
  927. dev_err(dev, "Failed to read device tree properties %d\n",
  928. ret);
  929. return ret;
  930. }
  931. ret = bq2515x_power_supply_register(bq2515x, dev, charger_cfg);
  932. if (ret) {
  933. dev_err(dev, "failed to register power supply\n");
  934. return ret;
  935. }
  936. ret = bq2515x_hw_init(bq2515x);
  937. if (ret) {
  938. dev_err(dev, "Cannot initialize the chip\n");
  939. return ret;
  940. }
  941. return 0;
  942. }
  943. static const struct i2c_device_id bq2515x_i2c_ids[] = {
  944. { "bq25150", BQ25150, },
  945. { "bq25155", BQ25155, },
  946. {},
  947. };
  948. MODULE_DEVICE_TABLE(i2c, bq2515x_i2c_ids);
  949. static const struct of_device_id bq2515x_of_match[] = {
  950. { .compatible = "ti,bq25150", },
  951. { .compatible = "ti,bq25155", },
  952. { },
  953. };
  954. MODULE_DEVICE_TABLE(of, bq2515x_of_match);
  955. static struct i2c_driver bq2515x_driver = {
  956. .driver = {
  957. .name = "bq2515x-charger",
  958. .of_match_table = bq2515x_of_match,
  959. },
  960. .probe = bq2515x_probe,
  961. .id_table = bq2515x_i2c_ids,
  962. };
  963. module_i2c_driver(bq2515x_driver);
  964. MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
  965. MODULE_AUTHOR("Ricardo Rivera-Matos <r-rivera-matos@ti.com>");
  966. MODULE_DESCRIPTION("BQ2515X charger driver");
  967. MODULE_LICENSE("GPL v2");