da9055-regulator.c 15 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. //
  3. // Regulator driver for DA9055 PMIC
  4. //
  5. // Copyright(c) 2012 Dialog Semiconductor Ltd.
  6. //
  7. // Author: David Dajun Chen <dchen@diasemi.com>
  8. #include <linux/module.h>
  9. #include <linux/init.h>
  10. #include <linux/err.h>
  11. #include <linux/gpio.h>
  12. #include <linux/gpio/consumer.h>
  13. #include <linux/platform_device.h>
  14. #include <linux/regulator/driver.h>
  15. #include <linux/regulator/machine.h>
  16. #include <linux/of.h>
  17. #include <linux/regulator/of_regulator.h>
  18. #include <linux/mfd/da9055/core.h>
  19. #include <linux/mfd/da9055/reg.h>
  20. #include <linux/mfd/da9055/pdata.h>
  21. #define DA9055_MIN_UA 0
  22. #define DA9055_MAX_UA 3
  23. #define DA9055_LDO_MODE_SYNC 0
  24. #define DA9055_LDO_MODE_SLEEP 1
  25. #define DA9055_BUCK_MODE_SLEEP 1
  26. #define DA9055_BUCK_MODE_SYNC 2
  27. #define DA9055_BUCK_MODE_AUTO 3
  28. /* DA9055 REGULATOR IDs */
  29. #define DA9055_ID_BUCK1 0
  30. #define DA9055_ID_BUCK2 1
  31. #define DA9055_ID_LDO1 2
  32. #define DA9055_ID_LDO2 3
  33. #define DA9055_ID_LDO3 4
  34. #define DA9055_ID_LDO4 5
  35. #define DA9055_ID_LDO5 6
  36. #define DA9055_ID_LDO6 7
  37. /* DA9055 BUCK current limit */
  38. static const unsigned int da9055_current_limits[] = {
  39. 500000, 600000, 700000, 800000
  40. };
  41. struct da9055_conf_reg {
  42. int reg;
  43. int sel_mask;
  44. int en_mask;
  45. };
  46. struct da9055_volt_reg {
  47. int reg_a;
  48. int reg_b;
  49. int sl_shift;
  50. int v_mask;
  51. };
  52. struct da9055_mode_reg {
  53. int reg;
  54. int mask;
  55. int shift;
  56. };
  57. struct da9055_regulator_info {
  58. struct regulator_desc reg_desc;
  59. struct da9055_conf_reg conf;
  60. struct da9055_volt_reg volt;
  61. struct da9055_mode_reg mode;
  62. };
  63. struct da9055_regulator {
  64. struct da9055 *da9055;
  65. struct da9055_regulator_info *info;
  66. struct regulator_dev *rdev;
  67. enum gpio_select reg_rselect;
  68. };
  69. static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev)
  70. {
  71. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  72. struct da9055_regulator_info *info = regulator->info;
  73. int ret, mode = 0;
  74. ret = da9055_reg_read(regulator->da9055, info->mode.reg);
  75. if (ret < 0)
  76. return ret;
  77. switch ((ret & info->mode.mask) >> info->mode.shift) {
  78. case DA9055_BUCK_MODE_SYNC:
  79. mode = REGULATOR_MODE_FAST;
  80. break;
  81. case DA9055_BUCK_MODE_AUTO:
  82. mode = REGULATOR_MODE_NORMAL;
  83. break;
  84. case DA9055_BUCK_MODE_SLEEP:
  85. mode = REGULATOR_MODE_STANDBY;
  86. break;
  87. }
  88. return mode;
  89. }
  90. static int da9055_buck_set_mode(struct regulator_dev *rdev,
  91. unsigned int mode)
  92. {
  93. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  94. struct da9055_regulator_info *info = regulator->info;
  95. int val = 0;
  96. switch (mode) {
  97. case REGULATOR_MODE_FAST:
  98. val = DA9055_BUCK_MODE_SYNC << info->mode.shift;
  99. break;
  100. case REGULATOR_MODE_NORMAL:
  101. val = DA9055_BUCK_MODE_AUTO << info->mode.shift;
  102. break;
  103. case REGULATOR_MODE_STANDBY:
  104. val = DA9055_BUCK_MODE_SLEEP << info->mode.shift;
  105. break;
  106. }
  107. return da9055_reg_update(regulator->da9055, info->mode.reg,
  108. info->mode.mask, val);
  109. }
  110. static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev)
  111. {
  112. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  113. struct da9055_regulator_info *info = regulator->info;
  114. int ret;
  115. ret = da9055_reg_read(regulator->da9055, info->volt.reg_b);
  116. if (ret < 0)
  117. return ret;
  118. if (ret >> info->volt.sl_shift)
  119. return REGULATOR_MODE_STANDBY;
  120. else
  121. return REGULATOR_MODE_NORMAL;
  122. }
  123. static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
  124. {
  125. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  126. struct da9055_regulator_info *info = regulator->info;
  127. struct da9055_volt_reg volt = info->volt;
  128. int val = 0;
  129. switch (mode) {
  130. case REGULATOR_MODE_NORMAL:
  131. case REGULATOR_MODE_FAST:
  132. val = DA9055_LDO_MODE_SYNC;
  133. break;
  134. case REGULATOR_MODE_STANDBY:
  135. val = DA9055_LDO_MODE_SLEEP;
  136. break;
  137. }
  138. return da9055_reg_update(regulator->da9055, volt.reg_b,
  139. 1 << volt.sl_shift,
  140. val << volt.sl_shift);
  141. }
  142. static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev)
  143. {
  144. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  145. struct da9055_regulator_info *info = regulator->info;
  146. struct da9055_volt_reg volt = info->volt;
  147. int ret, sel;
  148. /*
  149. * There are two voltage register set A & B for voltage ramping but
  150. * either one of then can be active therefore we first determine
  151. * the active register set.
  152. */
  153. ret = da9055_reg_read(regulator->da9055, info->conf.reg);
  154. if (ret < 0)
  155. return ret;
  156. ret &= info->conf.sel_mask;
  157. /* Get the voltage for the active register set A/B */
  158. if (ret == DA9055_REGUALTOR_SET_A)
  159. ret = da9055_reg_read(regulator->da9055, volt.reg_a);
  160. else
  161. ret = da9055_reg_read(regulator->da9055, volt.reg_b);
  162. if (ret < 0)
  163. return ret;
  164. sel = (ret & volt.v_mask);
  165. return sel;
  166. }
  167. static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev,
  168. unsigned int selector)
  169. {
  170. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  171. struct da9055_regulator_info *info = regulator->info;
  172. int ret;
  173. /*
  174. * Regulator register set A/B is not selected through GPIO therefore
  175. * we use default register set A for voltage ramping.
  176. */
  177. if (regulator->reg_rselect == NO_GPIO) {
  178. /* Select register set A */
  179. ret = da9055_reg_update(regulator->da9055, info->conf.reg,
  180. info->conf.sel_mask, DA9055_SEL_REG_A);
  181. if (ret < 0)
  182. return ret;
  183. /* Set the voltage */
  184. return da9055_reg_update(regulator->da9055, info->volt.reg_a,
  185. info->volt.v_mask, selector);
  186. }
  187. /*
  188. * Here regulator register set A/B is selected through GPIO.
  189. * Therefore we first determine the selected register set A/B and
  190. * then set the desired voltage for that register set A/B.
  191. */
  192. ret = da9055_reg_read(regulator->da9055, info->conf.reg);
  193. if (ret < 0)
  194. return ret;
  195. ret &= info->conf.sel_mask;
  196. /* Set the voltage */
  197. if (ret == DA9055_REGUALTOR_SET_A)
  198. return da9055_reg_update(regulator->da9055, info->volt.reg_a,
  199. info->volt.v_mask, selector);
  200. else
  201. return da9055_reg_update(regulator->da9055, info->volt.reg_b,
  202. info->volt.v_mask, selector);
  203. }
  204. static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev,
  205. int uV)
  206. {
  207. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  208. struct da9055_regulator_info *info = regulator->info;
  209. int ret;
  210. /* Select register set B for suspend voltage ramping. */
  211. if (regulator->reg_rselect == NO_GPIO) {
  212. ret = da9055_reg_update(regulator->da9055, info->conf.reg,
  213. info->conf.sel_mask, DA9055_SEL_REG_B);
  214. if (ret < 0)
  215. return ret;
  216. }
  217. ret = regulator_map_voltage_linear(rdev, uV, uV);
  218. if (ret < 0)
  219. return ret;
  220. return da9055_reg_update(regulator->da9055, info->volt.reg_b,
  221. info->volt.v_mask, ret);
  222. }
  223. static int da9055_suspend_enable(struct regulator_dev *rdev)
  224. {
  225. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  226. struct da9055_regulator_info *info = regulator->info;
  227. /* Select register set B for voltage ramping. */
  228. if (regulator->reg_rselect == NO_GPIO)
  229. return da9055_reg_update(regulator->da9055, info->conf.reg,
  230. info->conf.sel_mask, DA9055_SEL_REG_B);
  231. else
  232. return 0;
  233. }
  234. static int da9055_suspend_disable(struct regulator_dev *rdev)
  235. {
  236. struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
  237. struct da9055_regulator_info *info = regulator->info;
  238. /* Diselect register set B. */
  239. if (regulator->reg_rselect == NO_GPIO)
  240. return da9055_reg_update(regulator->da9055, info->conf.reg,
  241. info->conf.sel_mask, DA9055_SEL_REG_A);
  242. else
  243. return 0;
  244. }
  245. static const struct regulator_ops da9055_buck_ops = {
  246. .get_mode = da9055_buck_get_mode,
  247. .set_mode = da9055_buck_set_mode,
  248. .get_current_limit = regulator_get_current_limit_regmap,
  249. .set_current_limit = regulator_set_current_limit_regmap,
  250. .get_voltage_sel = da9055_regulator_get_voltage_sel,
  251. .set_voltage_sel = da9055_regulator_set_voltage_sel,
  252. .list_voltage = regulator_list_voltage_linear,
  253. .map_voltage = regulator_map_voltage_linear,
  254. .is_enabled = regulator_is_enabled_regmap,
  255. .enable = regulator_enable_regmap,
  256. .disable = regulator_disable_regmap,
  257. .set_suspend_voltage = da9055_regulator_set_suspend_voltage,
  258. .set_suspend_enable = da9055_suspend_enable,
  259. .set_suspend_disable = da9055_suspend_disable,
  260. .set_suspend_mode = da9055_buck_set_mode,
  261. };
  262. static const struct regulator_ops da9055_ldo_ops = {
  263. .get_mode = da9055_ldo_get_mode,
  264. .set_mode = da9055_ldo_set_mode,
  265. .get_voltage_sel = da9055_regulator_get_voltage_sel,
  266. .set_voltage_sel = da9055_regulator_set_voltage_sel,
  267. .list_voltage = regulator_list_voltage_linear,
  268. .map_voltage = regulator_map_voltage_linear,
  269. .is_enabled = regulator_is_enabled_regmap,
  270. .enable = regulator_enable_regmap,
  271. .disable = regulator_disable_regmap,
  272. .set_suspend_voltage = da9055_regulator_set_suspend_voltage,
  273. .set_suspend_enable = da9055_suspend_enable,
  274. .set_suspend_disable = da9055_suspend_disable,
  275. .set_suspend_mode = da9055_ldo_set_mode,
  276. };
  277. #define DA9055_LDO(_id, step, min, max, vbits, voffset) \
  278. {\
  279. .reg_desc = {\
  280. .name = #_id,\
  281. .of_match = of_match_ptr(#_id),\
  282. .regulators_node = of_match_ptr("regulators"),\
  283. .ops = &da9055_ldo_ops,\
  284. .type = REGULATOR_VOLTAGE,\
  285. .id = DA9055_ID_##_id,\
  286. .n_voltages = (max - min) / step + 1 + (voffset), \
  287. .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
  288. .enable_mask = 1, \
  289. .min_uV = (min) * 1000,\
  290. .uV_step = (step) * 1000,\
  291. .linear_min_sel = (voffset),\
  292. .owner = THIS_MODULE,\
  293. },\
  294. .conf = {\
  295. .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
  296. .sel_mask = (1 << 4),\
  297. .en_mask = 1,\
  298. },\
  299. .volt = {\
  300. .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
  301. .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
  302. .sl_shift = 7,\
  303. .v_mask = (1 << (vbits)) - 1,\
  304. },\
  305. }
  306. #define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \
  307. {\
  308. .reg_desc = {\
  309. .name = #_id,\
  310. .of_match = of_match_ptr(#_id),\
  311. .regulators_node = of_match_ptr("regulators"),\
  312. .ops = &da9055_buck_ops,\
  313. .type = REGULATOR_VOLTAGE,\
  314. .id = DA9055_ID_##_id,\
  315. .n_voltages = (max - min) / step + 1 + (voffset), \
  316. .enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
  317. .enable_mask = 1,\
  318. .min_uV = (min) * 1000,\
  319. .uV_step = (step) * 1000,\
  320. .linear_min_sel = (voffset),\
  321. .owner = THIS_MODULE,\
  322. .curr_table = da9055_current_limits,\
  323. .n_current_limits = ARRAY_SIZE(da9055_current_limits),\
  324. .csel_reg = DA9055_REG_BUCK_LIM,\
  325. .csel_mask = (mbits),\
  326. },\
  327. .conf = {\
  328. .reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
  329. .sel_mask = (1 << 4),\
  330. .en_mask = 1,\
  331. },\
  332. .volt = {\
  333. .reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
  334. .reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
  335. .sl_shift = 7,\
  336. .v_mask = (1 << (vbits)) - 1,\
  337. },\
  338. .mode = {\
  339. .reg = DA9055_REG_BCORE_MODE,\
  340. .mask = (mbits),\
  341. .shift = (sbits),\
  342. },\
  343. }
  344. static struct da9055_regulator_info da9055_regulator_info[] = {
  345. DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2),
  346. DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0),
  347. DA9055_LDO(LDO1, 50, 900, 3300, 6, 2),
  348. DA9055_LDO(LDO2, 50, 900, 3300, 6, 3),
  349. DA9055_LDO(LDO3, 50, 900, 3300, 6, 2),
  350. DA9055_LDO(LDO4, 50, 900, 3300, 6, 2),
  351. DA9055_LDO(LDO5, 50, 900, 2750, 6, 2),
  352. DA9055_LDO(LDO6, 20, 900, 3300, 7, 0),
  353. };
  354. /*
  355. * Configures regulator to be controlled either through GPIO 1 or 2.
  356. * GPIO can control regulator state and/or select the regulator register
  357. * set A/B for voltage ramping.
  358. */
  359. static int da9055_gpio_init(struct da9055_regulator *regulator,
  360. struct regulator_config *config,
  361. struct da9055_pdata *pdata, int id)
  362. {
  363. struct da9055_regulator_info *info = regulator->info;
  364. int ret = 0;
  365. if (!pdata)
  366. return 0;
  367. if (pdata->gpio_ren && pdata->gpio_ren[id]) {
  368. char name[18];
  369. int gpio_mux = pdata->gpio_ren[id];
  370. config->ena_gpiod = pdata->ena_gpiods[id];
  371. /*
  372. * GPI pin is muxed with regulator to control the
  373. * regulator state.
  374. */
  375. sprintf(name, "DA9055 GPI %d", gpio_mux);
  376. ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
  377. name);
  378. if (ret < 0)
  379. goto err;
  380. /*
  381. * Let the regulator know that its state is controlled
  382. * through GPI.
  383. */
  384. ret = da9055_reg_update(regulator->da9055, info->conf.reg,
  385. DA9055_E_GPI_MASK,
  386. pdata->reg_ren[id]
  387. << DA9055_E_GPI_SHIFT);
  388. if (ret < 0)
  389. goto err;
  390. }
  391. if (pdata->gpio_rsel && pdata->gpio_rsel[id]) {
  392. char name[18];
  393. int gpio_mux = pdata->gpio_rsel[id];
  394. regulator->reg_rselect = pdata->reg_rsel[id];
  395. /*
  396. * GPI pin is muxed with regulator to select the
  397. * regulator register set A/B for voltage ramping.
  398. */
  399. sprintf(name, "DA9055 GPI %d", gpio_mux);
  400. ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
  401. name);
  402. if (ret < 0)
  403. goto err;
  404. /*
  405. * Let the regulator know that its register set A/B
  406. * will be selected through GPI for voltage ramping.
  407. */
  408. ret = da9055_reg_update(regulator->da9055, info->conf.reg,
  409. DA9055_V_GPI_MASK,
  410. pdata->reg_rsel[id]
  411. << DA9055_V_GPI_SHIFT);
  412. }
  413. err:
  414. return ret;
  415. }
  416. static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data)
  417. {
  418. struct da9055_regulator *regulator = data;
  419. regulator_notifier_call_chain(regulator->rdev,
  420. REGULATOR_EVENT_OVER_CURRENT, NULL);
  421. return IRQ_HANDLED;
  422. }
  423. static inline struct da9055_regulator_info *find_regulator_info(int id)
  424. {
  425. struct da9055_regulator_info *info;
  426. int i;
  427. for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) {
  428. info = &da9055_regulator_info[i];
  429. if (info->reg_desc.id == id)
  430. return info;
  431. }
  432. return NULL;
  433. }
  434. static int da9055_regulator_probe(struct platform_device *pdev)
  435. {
  436. struct regulator_config config = { };
  437. struct da9055_regulator *regulator;
  438. struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
  439. struct da9055_pdata *pdata = dev_get_platdata(da9055->dev);
  440. int ret, irq;
  441. regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator),
  442. GFP_KERNEL);
  443. if (!regulator)
  444. return -ENOMEM;
  445. regulator->info = find_regulator_info(pdev->id);
  446. if (regulator->info == NULL) {
  447. dev_err(&pdev->dev, "invalid regulator ID specified\n");
  448. return -EINVAL;
  449. }
  450. regulator->da9055 = da9055;
  451. config.dev = da9055->dev;
  452. config.driver_data = regulator;
  453. config.regmap = da9055->regmap;
  454. if (pdata)
  455. config.init_data = pdata->regulators[pdev->id];
  456. ret = da9055_gpio_init(regulator, &config, pdata, pdev->id);
  457. if (ret < 0)
  458. return ret;
  459. regulator->rdev = devm_regulator_register(&pdev->dev,
  460. &regulator->info->reg_desc,
  461. &config);
  462. if (IS_ERR(regulator->rdev)) {
  463. dev_err(&pdev->dev, "Failed to register regulator %s\n",
  464. regulator->info->reg_desc.name);
  465. return PTR_ERR(regulator->rdev);
  466. }
  467. /* Only LDO 5 and 6 has got the over current interrupt */
  468. if (pdev->id == DA9055_ID_LDO5 || pdev->id == DA9055_ID_LDO6) {
  469. irq = platform_get_irq_byname(pdev, "REGULATOR");
  470. if (irq < 0)
  471. return irq;
  472. ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
  473. da9055_ldo5_6_oc_irq,
  474. IRQF_TRIGGER_HIGH |
  475. IRQF_ONESHOT |
  476. IRQF_PROBE_SHARED,
  477. pdev->name, regulator);
  478. if (ret != 0) {
  479. if (ret != -EBUSY) {
  480. dev_err(&pdev->dev,
  481. "Failed to request Regulator IRQ %d: %d\n",
  482. irq, ret);
  483. return ret;
  484. }
  485. }
  486. }
  487. platform_set_drvdata(pdev, regulator);
  488. return 0;
  489. }
  490. static struct platform_driver da9055_regulator_driver = {
  491. .probe = da9055_regulator_probe,
  492. .driver = {
  493. .name = "da9055-regulator",
  494. },
  495. };
  496. static int __init da9055_regulator_init(void)
  497. {
  498. return platform_driver_register(&da9055_regulator_driver);
  499. }
  500. subsys_initcall(da9055_regulator_init);
  501. static void __exit da9055_regulator_exit(void)
  502. {
  503. platform_driver_unregister(&da9055_regulator_driver);
  504. }
  505. module_exit(da9055_regulator_exit);
  506. MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
  507. MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC");
  508. MODULE_LICENSE("GPL");
  509. MODULE_ALIAS("platform:da9055-regulator");