helpers.c 23 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881
  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. //
  3. // helpers.c -- Voltage/Current Regulator framework helper functions.
  4. //
  5. // Copyright 2007, 2008 Wolfson Microelectronics PLC.
  6. // Copyright 2008 SlimLogic Ltd.
  7. #include <linux/kernel.h>
  8. #include <linux/err.h>
  9. #include <linux/delay.h>
  10. #include <linux/regmap.h>
  11. #include <linux/regulator/consumer.h>
  12. #include <linux/regulator/driver.h>
  13. #include <linux/module.h>
  14. #include "internal.h"
  15. /**
  16. * regulator_is_enabled_regmap - standard is_enabled() for regmap users
  17. *
  18. * @rdev: regulator to operate on
  19. *
  20. * Regulators that use regmap for their register I/O can set the
  21. * enable_reg and enable_mask fields in their descriptor and then use
  22. * this as their is_enabled operation, saving some code.
  23. */
  24. int regulator_is_enabled_regmap(struct regulator_dev *rdev)
  25. {
  26. unsigned int val;
  27. int ret;
  28. ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
  29. if (ret != 0)
  30. return ret;
  31. val &= rdev->desc->enable_mask;
  32. if (rdev->desc->enable_is_inverted) {
  33. if (rdev->desc->enable_val)
  34. return val != rdev->desc->enable_val;
  35. return val == 0;
  36. } else {
  37. if (rdev->desc->enable_val)
  38. return val == rdev->desc->enable_val;
  39. return val != 0;
  40. }
  41. }
  42. EXPORT_SYMBOL_GPL(regulator_is_enabled_regmap);
  43. /**
  44. * regulator_enable_regmap - standard enable() for regmap users
  45. *
  46. * @rdev: regulator to operate on
  47. *
  48. * Regulators that use regmap for their register I/O can set the
  49. * enable_reg and enable_mask fields in their descriptor and then use
  50. * this as their enable() operation, saving some code.
  51. */
  52. int regulator_enable_regmap(struct regulator_dev *rdev)
  53. {
  54. unsigned int val;
  55. if (rdev->desc->enable_is_inverted) {
  56. val = rdev->desc->disable_val;
  57. } else {
  58. val = rdev->desc->enable_val;
  59. if (!val)
  60. val = rdev->desc->enable_mask;
  61. }
  62. return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
  63. rdev->desc->enable_mask, val);
  64. }
  65. EXPORT_SYMBOL_GPL(regulator_enable_regmap);
  66. /**
  67. * regulator_disable_regmap - standard disable() for regmap users
  68. *
  69. * @rdev: regulator to operate on
  70. *
  71. * Regulators that use regmap for their register I/O can set the
  72. * enable_reg and enable_mask fields in their descriptor and then use
  73. * this as their disable() operation, saving some code.
  74. */
  75. int regulator_disable_regmap(struct regulator_dev *rdev)
  76. {
  77. unsigned int val;
  78. if (rdev->desc->enable_is_inverted) {
  79. val = rdev->desc->enable_val;
  80. if (!val)
  81. val = rdev->desc->enable_mask;
  82. } else {
  83. val = rdev->desc->disable_val;
  84. }
  85. return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
  86. rdev->desc->enable_mask, val);
  87. }
  88. EXPORT_SYMBOL_GPL(regulator_disable_regmap);
  89. static int regulator_range_selector_to_index(struct regulator_dev *rdev,
  90. unsigned int rval)
  91. {
  92. int i;
  93. if (!rdev->desc->linear_range_selectors)
  94. return -EINVAL;
  95. rval &= rdev->desc->vsel_range_mask;
  96. for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
  97. if (rdev->desc->linear_range_selectors[i] == rval)
  98. return i;
  99. }
  100. return -EINVAL;
  101. }
  102. /**
  103. * regulator_get_voltage_sel_pickable_regmap - pickable range get_voltage_sel
  104. *
  105. * @rdev: regulator to operate on
  106. *
  107. * Regulators that use regmap for their register I/O and use pickable
  108. * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
  109. * fields in their descriptor and then use this as their get_voltage_vsel
  110. * operation, saving some code.
  111. */
  112. int regulator_get_voltage_sel_pickable_regmap(struct regulator_dev *rdev)
  113. {
  114. unsigned int r_val;
  115. int range;
  116. unsigned int val;
  117. int ret;
  118. unsigned int voltages = 0;
  119. const struct linear_range *r = rdev->desc->linear_ranges;
  120. if (!r)
  121. return -EINVAL;
  122. ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
  123. if (ret != 0)
  124. return ret;
  125. ret = regmap_read(rdev->regmap, rdev->desc->vsel_range_reg, &r_val);
  126. if (ret != 0)
  127. return ret;
  128. val &= rdev->desc->vsel_mask;
  129. val >>= ffs(rdev->desc->vsel_mask) - 1;
  130. range = regulator_range_selector_to_index(rdev, r_val);
  131. if (range < 0)
  132. return -EINVAL;
  133. voltages = linear_range_values_in_range_array(r, range);
  134. return val + voltages;
  135. }
  136. EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_pickable_regmap);
  137. /**
  138. * regulator_set_voltage_sel_pickable_regmap - pickable range set_voltage_sel
  139. *
  140. * @rdev: regulator to operate on
  141. * @sel: Selector to set
  142. *
  143. * Regulators that use regmap for their register I/O and use pickable
  144. * ranges can set the vsel_reg, vsel_mask, vsel_range_reg and vsel_range_mask
  145. * fields in their descriptor and then use this as their set_voltage_vsel
  146. * operation, saving some code.
  147. */
  148. int regulator_set_voltage_sel_pickable_regmap(struct regulator_dev *rdev,
  149. unsigned int sel)
  150. {
  151. unsigned int range;
  152. int ret, i;
  153. unsigned int voltages_in_range = 0;
  154. for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
  155. const struct linear_range *r;
  156. r = &rdev->desc->linear_ranges[i];
  157. voltages_in_range = linear_range_values_in_range(r);
  158. if (sel < voltages_in_range)
  159. break;
  160. sel -= voltages_in_range;
  161. }
  162. if (i == rdev->desc->n_linear_ranges)
  163. return -EINVAL;
  164. sel <<= ffs(rdev->desc->vsel_mask) - 1;
  165. sel += rdev->desc->linear_ranges[i].min_sel;
  166. range = rdev->desc->linear_range_selectors[i];
  167. if (rdev->desc->vsel_reg == rdev->desc->vsel_range_reg) {
  168. ret = regmap_update_bits(rdev->regmap,
  169. rdev->desc->vsel_reg,
  170. rdev->desc->vsel_range_mask |
  171. rdev->desc->vsel_mask, sel | range);
  172. } else {
  173. ret = regmap_update_bits(rdev->regmap,
  174. rdev->desc->vsel_range_reg,
  175. rdev->desc->vsel_range_mask, range);
  176. if (ret)
  177. return ret;
  178. ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
  179. rdev->desc->vsel_mask, sel);
  180. }
  181. if (ret)
  182. return ret;
  183. if (rdev->desc->apply_bit)
  184. ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
  185. rdev->desc->apply_bit,
  186. rdev->desc->apply_bit);
  187. return ret;
  188. }
  189. EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_pickable_regmap);
  190. /**
  191. * regulator_get_voltage_sel_regmap - standard get_voltage_sel for regmap users
  192. *
  193. * @rdev: regulator to operate on
  194. *
  195. * Regulators that use regmap for their register I/O can set the
  196. * vsel_reg and vsel_mask fields in their descriptor and then use this
  197. * as their get_voltage_vsel operation, saving some code.
  198. */
  199. int regulator_get_voltage_sel_regmap(struct regulator_dev *rdev)
  200. {
  201. unsigned int val;
  202. int ret;
  203. ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val);
  204. if (ret != 0)
  205. return ret;
  206. val &= rdev->desc->vsel_mask;
  207. val >>= ffs(rdev->desc->vsel_mask) - 1;
  208. return val;
  209. }
  210. EXPORT_SYMBOL_GPL(regulator_get_voltage_sel_regmap);
  211. /**
  212. * regulator_set_voltage_sel_regmap - standard set_voltage_sel for regmap users
  213. *
  214. * @rdev: regulator to operate on
  215. * @sel: Selector to set
  216. *
  217. * Regulators that use regmap for their register I/O can set the
  218. * vsel_reg and vsel_mask fields in their descriptor and then use this
  219. * as their set_voltage_vsel operation, saving some code.
  220. */
  221. int regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
  222. {
  223. int ret;
  224. sel <<= ffs(rdev->desc->vsel_mask) - 1;
  225. ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg,
  226. rdev->desc->vsel_mask, sel);
  227. if (ret)
  228. return ret;
  229. if (rdev->desc->apply_bit)
  230. ret = regmap_update_bits(rdev->regmap, rdev->desc->apply_reg,
  231. rdev->desc->apply_bit,
  232. rdev->desc->apply_bit);
  233. return ret;
  234. }
  235. EXPORT_SYMBOL_GPL(regulator_set_voltage_sel_regmap);
  236. /**
  237. * regulator_map_voltage_iterate - map_voltage() based on list_voltage()
  238. *
  239. * @rdev: Regulator to operate on
  240. * @min_uV: Lower bound for voltage
  241. * @max_uV: Upper bound for voltage
  242. *
  243. * Drivers implementing set_voltage_sel() and list_voltage() can use
  244. * this as their map_voltage() operation. It will find a suitable
  245. * voltage by calling list_voltage() until it gets something in bounds
  246. * for the requested voltages.
  247. */
  248. int regulator_map_voltage_iterate(struct regulator_dev *rdev,
  249. int min_uV, int max_uV)
  250. {
  251. int best_val = INT_MAX;
  252. int selector = 0;
  253. int i, ret;
  254. /* Find the smallest voltage that falls within the specified
  255. * range.
  256. */
  257. for (i = 0; i < rdev->desc->n_voltages; i++) {
  258. ret = rdev->desc->ops->list_voltage(rdev, i);
  259. if (ret < 0)
  260. continue;
  261. if (ret < best_val && ret >= min_uV && ret <= max_uV) {
  262. best_val = ret;
  263. selector = i;
  264. }
  265. }
  266. if (best_val != INT_MAX)
  267. return selector;
  268. else
  269. return -EINVAL;
  270. }
  271. EXPORT_SYMBOL_GPL(regulator_map_voltage_iterate);
  272. /**
  273. * regulator_map_voltage_ascend - map_voltage() for ascendant voltage list
  274. *
  275. * @rdev: Regulator to operate on
  276. * @min_uV: Lower bound for voltage
  277. * @max_uV: Upper bound for voltage
  278. *
  279. * Drivers that have ascendant voltage list can use this as their
  280. * map_voltage() operation.
  281. */
  282. int regulator_map_voltage_ascend(struct regulator_dev *rdev,
  283. int min_uV, int max_uV)
  284. {
  285. int i, ret;
  286. for (i = 0; i < rdev->desc->n_voltages; i++) {
  287. ret = rdev->desc->ops->list_voltage(rdev, i);
  288. if (ret < 0)
  289. continue;
  290. if (ret > max_uV)
  291. break;
  292. if (ret >= min_uV && ret <= max_uV)
  293. return i;
  294. }
  295. return -EINVAL;
  296. }
  297. EXPORT_SYMBOL_GPL(regulator_map_voltage_ascend);
  298. /**
  299. * regulator_map_voltage_linear - map_voltage() for simple linear mappings
  300. *
  301. * @rdev: Regulator to operate on
  302. * @min_uV: Lower bound for voltage
  303. * @max_uV: Upper bound for voltage
  304. *
  305. * Drivers providing min_uV and uV_step in their regulator_desc can
  306. * use this as their map_voltage() operation.
  307. */
  308. int regulator_map_voltage_linear(struct regulator_dev *rdev,
  309. int min_uV, int max_uV)
  310. {
  311. int ret, voltage;
  312. /* Allow uV_step to be 0 for fixed voltage */
  313. if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) {
  314. if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV)
  315. return 0;
  316. else
  317. return -EINVAL;
  318. }
  319. if (!rdev->desc->uV_step) {
  320. BUG_ON(!rdev->desc->uV_step);
  321. return -EINVAL;
  322. }
  323. if (min_uV < rdev->desc->min_uV)
  324. min_uV = rdev->desc->min_uV;
  325. ret = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
  326. if (ret < 0)
  327. return ret;
  328. ret += rdev->desc->linear_min_sel;
  329. /* Map back into a voltage to verify we're still in bounds */
  330. voltage = rdev->desc->ops->list_voltage(rdev, ret);
  331. if (voltage < min_uV || voltage > max_uV)
  332. return -EINVAL;
  333. return ret;
  334. }
  335. EXPORT_SYMBOL_GPL(regulator_map_voltage_linear);
  336. /**
  337. * regulator_map_voltage_linear_range - map_voltage() for multiple linear ranges
  338. *
  339. * @rdev: Regulator to operate on
  340. * @min_uV: Lower bound for voltage
  341. * @max_uV: Upper bound for voltage
  342. *
  343. * Drivers providing linear_ranges in their descriptor can use this as
  344. * their map_voltage() callback.
  345. */
  346. int regulator_map_voltage_linear_range(struct regulator_dev *rdev,
  347. int min_uV, int max_uV)
  348. {
  349. const struct linear_range *range;
  350. int ret = -EINVAL;
  351. unsigned int sel;
  352. bool found;
  353. int voltage, i;
  354. if (!rdev->desc->n_linear_ranges) {
  355. BUG_ON(!rdev->desc->n_linear_ranges);
  356. return -EINVAL;
  357. }
  358. for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
  359. range = &rdev->desc->linear_ranges[i];
  360. ret = linear_range_get_selector_high(range, min_uV, &sel,
  361. &found);
  362. if (ret)
  363. continue;
  364. ret = sel;
  365. /*
  366. * Map back into a voltage to verify we're still in bounds.
  367. * If we are not, then continue checking rest of the ranges.
  368. */
  369. voltage = rdev->desc->ops->list_voltage(rdev, sel);
  370. if (voltage >= min_uV && voltage <= max_uV)
  371. break;
  372. }
  373. if (i == rdev->desc->n_linear_ranges)
  374. return -EINVAL;
  375. return ret;
  376. }
  377. EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range);
  378. /**
  379. * regulator_map_voltage_pickable_linear_range - map_voltage, pickable ranges
  380. *
  381. * @rdev: Regulator to operate on
  382. * @min_uV: Lower bound for voltage
  383. * @max_uV: Upper bound for voltage
  384. *
  385. * Drivers providing pickable linear_ranges in their descriptor can use
  386. * this as their map_voltage() callback.
  387. */
  388. int regulator_map_voltage_pickable_linear_range(struct regulator_dev *rdev,
  389. int min_uV, int max_uV)
  390. {
  391. const struct linear_range *range;
  392. int ret = -EINVAL;
  393. int voltage, i;
  394. unsigned int selector = 0;
  395. if (!rdev->desc->n_linear_ranges) {
  396. BUG_ON(!rdev->desc->n_linear_ranges);
  397. return -EINVAL;
  398. }
  399. for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
  400. int linear_max_uV;
  401. bool found;
  402. unsigned int sel;
  403. range = &rdev->desc->linear_ranges[i];
  404. linear_max_uV = linear_range_get_max_value(range);
  405. if (!(min_uV <= linear_max_uV && max_uV >= range->min)) {
  406. selector += linear_range_values_in_range(range);
  407. continue;
  408. }
  409. ret = linear_range_get_selector_high(range, min_uV, &sel,
  410. &found);
  411. if (ret) {
  412. selector += linear_range_values_in_range(range);
  413. continue;
  414. }
  415. ret = selector + sel - range->min_sel;
  416. voltage = rdev->desc->ops->list_voltage(rdev, ret);
  417. /*
  418. * Map back into a voltage to verify we're still in bounds.
  419. * We may have overlapping voltage ranges. Hence we don't
  420. * exit but retry until we have checked all ranges.
  421. */
  422. if (voltage < min_uV || voltage > max_uV)
  423. selector += linear_range_values_in_range(range);
  424. else
  425. break;
  426. }
  427. if (i == rdev->desc->n_linear_ranges)
  428. return -EINVAL;
  429. return ret;
  430. }
  431. EXPORT_SYMBOL_GPL(regulator_map_voltage_pickable_linear_range);
  432. /**
  433. * regulator_list_voltage_linear - List voltages with simple calculation
  434. *
  435. * @rdev: Regulator device
  436. * @selector: Selector to convert into a voltage
  437. *
  438. * Regulators with a simple linear mapping between voltages and
  439. * selectors can set min_uV and uV_step in the regulator descriptor
  440. * and then use this function as their list_voltage() operation,
  441. */
  442. int regulator_list_voltage_linear(struct regulator_dev *rdev,
  443. unsigned int selector)
  444. {
  445. if (selector >= rdev->desc->n_voltages)
  446. return -EINVAL;
  447. if (selector < rdev->desc->linear_min_sel)
  448. return 0;
  449. selector -= rdev->desc->linear_min_sel;
  450. return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
  451. }
  452. EXPORT_SYMBOL_GPL(regulator_list_voltage_linear);
  453. /**
  454. * regulator_list_voltage_pickable_linear_range - pickable range list voltages
  455. *
  456. * @rdev: Regulator device
  457. * @selector: Selector to convert into a voltage
  458. *
  459. * list_voltage() operation, intended to be used by drivers utilizing pickable
  460. * ranges helpers.
  461. */
  462. int regulator_list_voltage_pickable_linear_range(struct regulator_dev *rdev,
  463. unsigned int selector)
  464. {
  465. const struct linear_range *range;
  466. int i;
  467. unsigned int all_sels = 0;
  468. if (!rdev->desc->n_linear_ranges) {
  469. BUG_ON(!rdev->desc->n_linear_ranges);
  470. return -EINVAL;
  471. }
  472. for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
  473. unsigned int sel_indexes;
  474. range = &rdev->desc->linear_ranges[i];
  475. sel_indexes = linear_range_values_in_range(range) - 1;
  476. if (all_sels + sel_indexes >= selector) {
  477. selector -= all_sels;
  478. /*
  479. * As we see here, pickable ranges work only as
  480. * long as the first selector for each pickable
  481. * range is 0, and the each subsequent range for
  482. * this 'pick' follow immediately at next unused
  483. * selector (Eg. there is no gaps between ranges).
  484. * I think this is fine but it probably should be
  485. * documented. OTOH, whole pickable range stuff
  486. * might benefit from some documentation
  487. */
  488. return range->min + (range->step * selector);
  489. }
  490. all_sels += (sel_indexes + 1);
  491. }
  492. return -EINVAL;
  493. }
  494. EXPORT_SYMBOL_GPL(regulator_list_voltage_pickable_linear_range);
  495. /**
  496. * regulator_desc_list_voltage_linear_range - List voltages for linear ranges
  497. *
  498. * @desc: Regulator desc for regulator which volatges are to be listed
  499. * @selector: Selector to convert into a voltage
  500. *
  501. * Regulators with a series of simple linear mappings between voltages
  502. * and selectors who have set linear_ranges in the regulator descriptor
  503. * can use this function prior regulator registration to list voltages.
  504. * This is useful when voltages need to be listed during device-tree
  505. * parsing.
  506. */
  507. int regulator_desc_list_voltage_linear_range(const struct regulator_desc *desc,
  508. unsigned int selector)
  509. {
  510. unsigned int val;
  511. int ret;
  512. BUG_ON(!desc->n_linear_ranges);
  513. ret = linear_range_get_value_array(desc->linear_ranges,
  514. desc->n_linear_ranges, selector,
  515. &val);
  516. if (ret)
  517. return ret;
  518. return val;
  519. }
  520. EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear_range);
  521. /**
  522. * regulator_list_voltage_linear_range - List voltages for linear ranges
  523. *
  524. * @rdev: Regulator device
  525. * @selector: Selector to convert into a voltage
  526. *
  527. * Regulators with a series of simple linear mappings between voltages
  528. * and selectors can set linear_ranges in the regulator descriptor and
  529. * then use this function as their list_voltage() operation,
  530. */
  531. int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
  532. unsigned int selector)
  533. {
  534. return regulator_desc_list_voltage_linear_range(rdev->desc, selector);
  535. }
  536. EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range);
  537. /**
  538. * regulator_list_voltage_table - List voltages with table based mapping
  539. *
  540. * @rdev: Regulator device
  541. * @selector: Selector to convert into a voltage
  542. *
  543. * Regulators with table based mapping between voltages and
  544. * selectors can set volt_table in the regulator descriptor
  545. * and then use this function as their list_voltage() operation.
  546. */
  547. int regulator_list_voltage_table(struct regulator_dev *rdev,
  548. unsigned int selector)
  549. {
  550. if (!rdev->desc->volt_table) {
  551. BUG_ON(!rdev->desc->volt_table);
  552. return -EINVAL;
  553. }
  554. if (selector >= rdev->desc->n_voltages)
  555. return -EINVAL;
  556. return rdev->desc->volt_table[selector];
  557. }
  558. EXPORT_SYMBOL_GPL(regulator_list_voltage_table);
  559. /**
  560. * regulator_set_bypass_regmap - Default set_bypass() using regmap
  561. *
  562. * @rdev: device to operate on.
  563. * @enable: state to set.
  564. */
  565. int regulator_set_bypass_regmap(struct regulator_dev *rdev, bool enable)
  566. {
  567. unsigned int val;
  568. if (enable) {
  569. val = rdev->desc->bypass_val_on;
  570. if (!val)
  571. val = rdev->desc->bypass_mask;
  572. } else {
  573. val = rdev->desc->bypass_val_off;
  574. }
  575. return regmap_update_bits(rdev->regmap, rdev->desc->bypass_reg,
  576. rdev->desc->bypass_mask, val);
  577. }
  578. EXPORT_SYMBOL_GPL(regulator_set_bypass_regmap);
  579. /**
  580. * regulator_set_soft_start_regmap - Default set_soft_start() using regmap
  581. *
  582. * @rdev: device to operate on.
  583. */
  584. int regulator_set_soft_start_regmap(struct regulator_dev *rdev)
  585. {
  586. unsigned int val;
  587. val = rdev->desc->soft_start_val_on;
  588. if (!val)
  589. val = rdev->desc->soft_start_mask;
  590. return regmap_update_bits(rdev->regmap, rdev->desc->soft_start_reg,
  591. rdev->desc->soft_start_mask, val);
  592. }
  593. EXPORT_SYMBOL_GPL(regulator_set_soft_start_regmap);
  594. /**
  595. * regulator_set_pull_down_regmap - Default set_pull_down() using regmap
  596. *
  597. * @rdev: device to operate on.
  598. */
  599. int regulator_set_pull_down_regmap(struct regulator_dev *rdev)
  600. {
  601. unsigned int val;
  602. val = rdev->desc->pull_down_val_on;
  603. if (!val)
  604. val = rdev->desc->pull_down_mask;
  605. return regmap_update_bits(rdev->regmap, rdev->desc->pull_down_reg,
  606. rdev->desc->pull_down_mask, val);
  607. }
  608. EXPORT_SYMBOL_GPL(regulator_set_pull_down_regmap);
  609. /**
  610. * regulator_get_bypass_regmap - Default get_bypass() using regmap
  611. *
  612. * @rdev: device to operate on.
  613. * @enable: current state.
  614. */
  615. int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
  616. {
  617. unsigned int val;
  618. unsigned int val_on = rdev->desc->bypass_val_on;
  619. int ret;
  620. ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
  621. if (ret != 0)
  622. return ret;
  623. if (!val_on)
  624. val_on = rdev->desc->bypass_mask;
  625. *enable = (val & rdev->desc->bypass_mask) == val_on;
  626. return 0;
  627. }
  628. EXPORT_SYMBOL_GPL(regulator_get_bypass_regmap);
  629. /**
  630. * regulator_set_active_discharge_regmap - Default set_active_discharge()
  631. * using regmap
  632. *
  633. * @rdev: device to operate on.
  634. * @enable: state to set, 0 to disable and 1 to enable.
  635. */
  636. int regulator_set_active_discharge_regmap(struct regulator_dev *rdev,
  637. bool enable)
  638. {
  639. unsigned int val;
  640. if (enable)
  641. val = rdev->desc->active_discharge_on;
  642. else
  643. val = rdev->desc->active_discharge_off;
  644. return regmap_update_bits(rdev->regmap,
  645. rdev->desc->active_discharge_reg,
  646. rdev->desc->active_discharge_mask, val);
  647. }
  648. EXPORT_SYMBOL_GPL(regulator_set_active_discharge_regmap);
  649. /**
  650. * regulator_set_current_limit_regmap - set_current_limit for regmap users
  651. *
  652. * @rdev: regulator to operate on
  653. * @min_uA: Lower bound for current limit
  654. * @max_uA: Upper bound for current limit
  655. *
  656. * Regulators that use regmap for their register I/O can set curr_table,
  657. * csel_reg and csel_mask fields in their descriptor and then use this
  658. * as their set_current_limit operation, saving some code.
  659. */
  660. int regulator_set_current_limit_regmap(struct regulator_dev *rdev,
  661. int min_uA, int max_uA)
  662. {
  663. unsigned int n_currents = rdev->desc->n_current_limits;
  664. int i, sel = -1;
  665. if (n_currents == 0)
  666. return -EINVAL;
  667. if (rdev->desc->curr_table) {
  668. const unsigned int *curr_table = rdev->desc->curr_table;
  669. bool ascend = curr_table[n_currents - 1] > curr_table[0];
  670. /* search for closest to maximum */
  671. if (ascend) {
  672. for (i = n_currents - 1; i >= 0; i--) {
  673. if (min_uA <= curr_table[i] &&
  674. curr_table[i] <= max_uA) {
  675. sel = i;
  676. break;
  677. }
  678. }
  679. } else {
  680. for (i = 0; i < n_currents; i++) {
  681. if (min_uA <= curr_table[i] &&
  682. curr_table[i] <= max_uA) {
  683. sel = i;
  684. break;
  685. }
  686. }
  687. }
  688. }
  689. if (sel < 0)
  690. return -EINVAL;
  691. sel <<= ffs(rdev->desc->csel_mask) - 1;
  692. return regmap_update_bits(rdev->regmap, rdev->desc->csel_reg,
  693. rdev->desc->csel_mask, sel);
  694. }
  695. EXPORT_SYMBOL_GPL(regulator_set_current_limit_regmap);
  696. /**
  697. * regulator_get_current_limit_regmap - get_current_limit for regmap users
  698. *
  699. * @rdev: regulator to operate on
  700. *
  701. * Regulators that use regmap for their register I/O can set the
  702. * csel_reg and csel_mask fields in their descriptor and then use this
  703. * as their get_current_limit operation, saving some code.
  704. */
  705. int regulator_get_current_limit_regmap(struct regulator_dev *rdev)
  706. {
  707. unsigned int val;
  708. int ret;
  709. ret = regmap_read(rdev->regmap, rdev->desc->csel_reg, &val);
  710. if (ret != 0)
  711. return ret;
  712. val &= rdev->desc->csel_mask;
  713. val >>= ffs(rdev->desc->csel_mask) - 1;
  714. if (rdev->desc->curr_table) {
  715. if (val >= rdev->desc->n_current_limits)
  716. return -EINVAL;
  717. return rdev->desc->curr_table[val];
  718. }
  719. return -EINVAL;
  720. }
  721. EXPORT_SYMBOL_GPL(regulator_get_current_limit_regmap);
  722. /**
  723. * regulator_bulk_set_supply_names - initialize the 'supply' fields in an array
  724. * of regulator_bulk_data structs
  725. *
  726. * @consumers: array of regulator_bulk_data entries to initialize
  727. * @supply_names: array of supply name strings
  728. * @num_supplies: number of supply names to initialize
  729. *
  730. * Note: the 'consumers' array must be the size of 'num_supplies'.
  731. */
  732. void regulator_bulk_set_supply_names(struct regulator_bulk_data *consumers,
  733. const char *const *supply_names,
  734. unsigned int num_supplies)
  735. {
  736. unsigned int i;
  737. for (i = 0; i < num_supplies; i++)
  738. consumers[i].supply = supply_names[i];
  739. }
  740. EXPORT_SYMBOL_GPL(regulator_bulk_set_supply_names);
  741. /**
  742. * regulator_is_equal - test whether two regulators are the same
  743. *
  744. * @reg1: first regulator to operate on
  745. * @reg2: second regulator to operate on
  746. */
  747. bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2)
  748. {
  749. return reg1->rdev == reg2->rdev;
  750. }
  751. EXPORT_SYMBOL_GPL(regulator_is_equal);