max8907-regulator.c 11 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * max8907-regulator.c -- support regulators in max8907
  4. *
  5. * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
  6. * Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
  7. *
  8. * Portions based on drivers/regulator/tps65910-regulator.c,
  9. * Copyright 2010 Texas Instruments Inc.
  10. * Author: Graeme Gregory <gg@slimlogic.co.uk>
  11. * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
  12. */
  13. #include <linux/err.h>
  14. #include <linux/init.h>
  15. #include <linux/mfd/core.h>
  16. #include <linux/mfd/max8907.h>
  17. #include <linux/module.h>
  18. #include <linux/of.h>
  19. #include <linux/platform_device.h>
  20. #include <linux/regulator/driver.h>
  21. #include <linux/regulator/machine.h>
  22. #include <linux/regulator/of_regulator.h>
  23. #include <linux/regmap.h>
  24. #include <linux/slab.h>
  25. #define MAX8907_II2RR_VERSION_MASK 0xF0
  26. #define MAX8907_II2RR_VERSION_REV_A 0x00
  27. #define MAX8907_II2RR_VERSION_REV_B 0x10
  28. #define MAX8907_II2RR_VERSION_REV_C 0x30
  29. struct max8907_regulator {
  30. struct regulator_desc desc[MAX8907_NUM_REGULATORS];
  31. };
  32. #define REG_MBATT() \
  33. [MAX8907_MBATT] = { \
  34. .name = "MBATT", \
  35. .supply_name = "mbatt", \
  36. .id = MAX8907_MBATT, \
  37. .ops = &max8907_mbatt_ops, \
  38. .type = REGULATOR_VOLTAGE, \
  39. .owner = THIS_MODULE, \
  40. }
  41. #define REG_LDO(ids, supply, base, min, max, step) \
  42. [MAX8907_##ids] = { \
  43. .name = #ids, \
  44. .supply_name = supply, \
  45. .id = MAX8907_##ids, \
  46. .n_voltages = ((max) - (min)) / (step) + 1, \
  47. .ops = &max8907_ldo_ops, \
  48. .type = REGULATOR_VOLTAGE, \
  49. .owner = THIS_MODULE, \
  50. .min_uV = (min), \
  51. .uV_step = (step), \
  52. .vsel_reg = (base) + MAX8907_VOUT, \
  53. .vsel_mask = 0x3f, \
  54. .enable_reg = (base) + MAX8907_CTL, \
  55. .enable_mask = MAX8907_MASK_LDO_EN, \
  56. }
  57. #define REG_FIXED(ids, supply, voltage) \
  58. [MAX8907_##ids] = { \
  59. .name = #ids, \
  60. .supply_name = supply, \
  61. .id = MAX8907_##ids, \
  62. .n_voltages = 1, \
  63. .ops = &max8907_fixed_ops, \
  64. .type = REGULATOR_VOLTAGE, \
  65. .owner = THIS_MODULE, \
  66. .min_uV = (voltage), \
  67. }
  68. #define REG_OUT5V(ids, supply, base, voltage) \
  69. [MAX8907_##ids] = { \
  70. .name = #ids, \
  71. .supply_name = supply, \
  72. .id = MAX8907_##ids, \
  73. .n_voltages = 1, \
  74. .ops = &max8907_out5v_ops, \
  75. .type = REGULATOR_VOLTAGE, \
  76. .owner = THIS_MODULE, \
  77. .min_uV = (voltage), \
  78. .enable_reg = (base), \
  79. .enable_mask = MAX8907_MASK_OUT5V_EN, \
  80. }
  81. #define REG_BBAT(ids, supply, base, min, max, step) \
  82. [MAX8907_##ids] = { \
  83. .name = #ids, \
  84. .supply_name = supply, \
  85. .id = MAX8907_##ids, \
  86. .n_voltages = ((max) - (min)) / (step) + 1, \
  87. .ops = &max8907_bbat_ops, \
  88. .type = REGULATOR_VOLTAGE, \
  89. .owner = THIS_MODULE, \
  90. .min_uV = (min), \
  91. .uV_step = (step), \
  92. .vsel_reg = (base), \
  93. .vsel_mask = MAX8907_MASK_VBBATTCV, \
  94. }
  95. #define LDO_750_50(id, supply, base) REG_LDO(id, supply, (base), \
  96. 750000, 3900000, 50000)
  97. #define LDO_650_25(id, supply, base) REG_LDO(id, supply, (base), \
  98. 650000, 2225000, 25000)
  99. static const struct regulator_ops max8907_mbatt_ops = {
  100. };
  101. static const struct regulator_ops max8907_ldo_ops = {
  102. .list_voltage = regulator_list_voltage_linear,
  103. .set_voltage_sel = regulator_set_voltage_sel_regmap,
  104. .get_voltage_sel = regulator_get_voltage_sel_regmap,
  105. .enable = regulator_enable_regmap,
  106. .disable = regulator_disable_regmap,
  107. .is_enabled = regulator_is_enabled_regmap,
  108. };
  109. static const struct regulator_ops max8907_ldo_hwctl_ops = {
  110. .list_voltage = regulator_list_voltage_linear,
  111. .set_voltage_sel = regulator_set_voltage_sel_regmap,
  112. .get_voltage_sel = regulator_get_voltage_sel_regmap,
  113. };
  114. static const struct regulator_ops max8907_fixed_ops = {
  115. .list_voltage = regulator_list_voltage_linear,
  116. };
  117. static const struct regulator_ops max8907_out5v_ops = {
  118. .list_voltage = regulator_list_voltage_linear,
  119. .enable = regulator_enable_regmap,
  120. .disable = regulator_disable_regmap,
  121. .is_enabled = regulator_is_enabled_regmap,
  122. };
  123. static const struct regulator_ops max8907_out5v_hwctl_ops = {
  124. .list_voltage = regulator_list_voltage_linear,
  125. };
  126. static const struct regulator_ops max8907_bbat_ops = {
  127. .list_voltage = regulator_list_voltage_linear,
  128. .set_voltage_sel = regulator_set_voltage_sel_regmap,
  129. .get_voltage_sel = regulator_get_voltage_sel_regmap,
  130. };
  131. static const struct regulator_desc max8907_regulators[] = {
  132. REG_MBATT(),
  133. REG_LDO(SD1, "in-v1", MAX8907_REG_SDCTL1, 650000, 2225000, 25000),
  134. REG_LDO(SD2, "in-v2", MAX8907_REG_SDCTL2, 637500, 1425000, 12500),
  135. REG_LDO(SD3, "in-v3", MAX8907_REG_SDCTL3, 750000, 3900000, 50000),
  136. LDO_750_50(LDO1, "in1", MAX8907_REG_LDOCTL1),
  137. LDO_650_25(LDO2, "in2", MAX8907_REG_LDOCTL2),
  138. LDO_650_25(LDO3, "in3", MAX8907_REG_LDOCTL3),
  139. LDO_750_50(LDO4, "in4", MAX8907_REG_LDOCTL4),
  140. LDO_750_50(LDO5, "in5", MAX8907_REG_LDOCTL5),
  141. LDO_750_50(LDO6, "in6", MAX8907_REG_LDOCTL6),
  142. LDO_750_50(LDO7, "in7", MAX8907_REG_LDOCTL7),
  143. LDO_750_50(LDO8, "in8", MAX8907_REG_LDOCTL8),
  144. LDO_750_50(LDO9, "in9", MAX8907_REG_LDOCTL9),
  145. LDO_750_50(LDO10, "in10", MAX8907_REG_LDOCTL10),
  146. LDO_750_50(LDO11, "in11", MAX8907_REG_LDOCTL11),
  147. LDO_750_50(LDO12, "in12", MAX8907_REG_LDOCTL12),
  148. LDO_750_50(LDO13, "in13", MAX8907_REG_LDOCTL13),
  149. LDO_750_50(LDO14, "in14", MAX8907_REG_LDOCTL14),
  150. LDO_750_50(LDO15, "in15", MAX8907_REG_LDOCTL15),
  151. LDO_750_50(LDO16, "in16", MAX8907_REG_LDOCTL16),
  152. LDO_650_25(LDO17, "in17", MAX8907_REG_LDOCTL17),
  153. LDO_650_25(LDO18, "in18", MAX8907_REG_LDOCTL18),
  154. LDO_750_50(LDO19, "in19", MAX8907_REG_LDOCTL19),
  155. LDO_750_50(LDO20, "in20", MAX8907_REG_LDOCTL20),
  156. REG_OUT5V(OUT5V, "mbatt", MAX8907_REG_OUT5VEN, 5000000),
  157. REG_OUT5V(OUT33V, "mbatt", MAX8907_REG_OUT33VEN, 3300000),
  158. REG_BBAT(BBAT, "MBATT", MAX8907_REG_BBAT_CNFG,
  159. 2400000, 3000000, 200000),
  160. REG_FIXED(SDBY, "MBATT", 1200000),
  161. REG_FIXED(VRTC, "MBATT", 3300000),
  162. };
  163. #ifdef CONFIG_OF
  164. #define MATCH(_name, _id) \
  165. [MAX8907_##_id] = { \
  166. .name = #_name, \
  167. .driver_data = (void *)&max8907_regulators[MAX8907_##_id], \
  168. }
  169. static struct of_regulator_match max8907_matches[] = {
  170. MATCH(mbatt, MBATT),
  171. MATCH(sd1, SD1),
  172. MATCH(sd2, SD2),
  173. MATCH(sd3, SD3),
  174. MATCH(ldo1, LDO1),
  175. MATCH(ldo2, LDO2),
  176. MATCH(ldo3, LDO3),
  177. MATCH(ldo4, LDO4),
  178. MATCH(ldo5, LDO5),
  179. MATCH(ldo6, LDO6),
  180. MATCH(ldo7, LDO7),
  181. MATCH(ldo8, LDO8),
  182. MATCH(ldo9, LDO9),
  183. MATCH(ldo10, LDO10),
  184. MATCH(ldo11, LDO11),
  185. MATCH(ldo12, LDO12),
  186. MATCH(ldo13, LDO13),
  187. MATCH(ldo14, LDO14),
  188. MATCH(ldo15, LDO15),
  189. MATCH(ldo16, LDO16),
  190. MATCH(ldo17, LDO17),
  191. MATCH(ldo18, LDO18),
  192. MATCH(ldo19, LDO19),
  193. MATCH(ldo20, LDO20),
  194. MATCH(out5v, OUT5V),
  195. MATCH(out33v, OUT33V),
  196. MATCH(bbat, BBAT),
  197. MATCH(sdby, SDBY),
  198. MATCH(vrtc, VRTC),
  199. };
  200. static int max8907_regulator_parse_dt(struct platform_device *pdev)
  201. {
  202. struct device_node *np, *regulators;
  203. int ret;
  204. np = pdev->dev.parent->of_node;
  205. if (!np)
  206. return 0;
  207. regulators = of_get_child_by_name(np, "regulators");
  208. if (!regulators) {
  209. dev_err(&pdev->dev, "regulators node not found\n");
  210. return -EINVAL;
  211. }
  212. ret = of_regulator_match(&pdev->dev, regulators, max8907_matches,
  213. ARRAY_SIZE(max8907_matches));
  214. of_node_put(regulators);
  215. if (ret < 0) {
  216. dev_err(&pdev->dev, "Error parsing regulator init data: %d\n",
  217. ret);
  218. return ret;
  219. }
  220. return 0;
  221. }
  222. static inline struct regulator_init_data *match_init_data(int index)
  223. {
  224. return max8907_matches[index].init_data;
  225. }
  226. static inline struct device_node *match_of_node(int index)
  227. {
  228. return max8907_matches[index].of_node;
  229. }
  230. #else
  231. static int max8907_regulator_parse_dt(struct platform_device *pdev)
  232. {
  233. return 0;
  234. }
  235. static inline struct regulator_init_data *match_init_data(int index)
  236. {
  237. return NULL;
  238. }
  239. static inline struct device_node *match_of_node(int index)
  240. {
  241. return NULL;
  242. }
  243. #endif
  244. static int max8907_regulator_probe(struct platform_device *pdev)
  245. {
  246. struct max8907 *max8907 = dev_get_drvdata(pdev->dev.parent);
  247. struct max8907_platform_data *pdata = dev_get_platdata(max8907->dev);
  248. int ret;
  249. struct max8907_regulator *pmic;
  250. unsigned int val;
  251. int i;
  252. struct regulator_config config = {};
  253. struct regulator_init_data *idata;
  254. const char *mbatt_rail_name = NULL;
  255. ret = max8907_regulator_parse_dt(pdev);
  256. if (ret)
  257. return ret;
  258. pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL);
  259. if (!pmic)
  260. return -ENOMEM;
  261. platform_set_drvdata(pdev, pmic);
  262. memcpy(pmic->desc, max8907_regulators, sizeof(pmic->desc));
  263. /* Backwards compatibility with MAX8907B; SD1 uses different voltages */
  264. ret = regmap_read(max8907->regmap_gen, MAX8907_REG_II2RR, &val);
  265. if (ret)
  266. return ret;
  267. if ((val & MAX8907_II2RR_VERSION_MASK) ==
  268. MAX8907_II2RR_VERSION_REV_B) {
  269. pmic->desc[MAX8907_SD1].min_uV = 637500;
  270. pmic->desc[MAX8907_SD1].uV_step = 12500;
  271. pmic->desc[MAX8907_SD1].n_voltages =
  272. (1425000 - 637500) / 12500 + 1;
  273. }
  274. for (i = 0; i < MAX8907_NUM_REGULATORS; i++) {
  275. struct regulator_dev *rdev;
  276. config.dev = pdev->dev.parent;
  277. if (pdata)
  278. idata = pdata->init_data[i];
  279. else
  280. idata = match_init_data(i);
  281. config.init_data = idata;
  282. config.driver_data = pmic;
  283. config.regmap = max8907->regmap_gen;
  284. config.of_node = match_of_node(i);
  285. switch (pmic->desc[i].id) {
  286. case MAX8907_MBATT:
  287. if (idata && idata->constraints.name)
  288. mbatt_rail_name = idata->constraints.name;
  289. else
  290. mbatt_rail_name = pmic->desc[i].name;
  291. break;
  292. case MAX8907_BBAT:
  293. case MAX8907_SDBY:
  294. case MAX8907_VRTC:
  295. idata->supply_regulator = mbatt_rail_name;
  296. break;
  297. }
  298. if (pmic->desc[i].ops == &max8907_ldo_ops) {
  299. ret = regmap_read(config.regmap, pmic->desc[i].enable_reg,
  300. &val);
  301. if (ret)
  302. return ret;
  303. if ((val & MAX8907_MASK_LDO_SEQ) !=
  304. MAX8907_MASK_LDO_SEQ)
  305. pmic->desc[i].ops = &max8907_ldo_hwctl_ops;
  306. } else if (pmic->desc[i].ops == &max8907_out5v_ops) {
  307. ret = regmap_read(config.regmap, pmic->desc[i].enable_reg,
  308. &val);
  309. if (ret)
  310. return ret;
  311. if ((val & (MAX8907_MASK_OUT5V_VINEN |
  312. MAX8907_MASK_OUT5V_ENSRC)) !=
  313. MAX8907_MASK_OUT5V_ENSRC)
  314. pmic->desc[i].ops = &max8907_out5v_hwctl_ops;
  315. }
  316. rdev = devm_regulator_register(&pdev->dev,
  317. &pmic->desc[i], &config);
  318. if (IS_ERR(rdev)) {
  319. dev_err(&pdev->dev,
  320. "failed to register %s regulator\n",
  321. pmic->desc[i].name);
  322. return PTR_ERR(rdev);
  323. }
  324. }
  325. return 0;
  326. }
  327. static struct platform_driver max8907_regulator_driver = {
  328. .driver = {
  329. .name = "max8907-regulator",
  330. },
  331. .probe = max8907_regulator_probe,
  332. };
  333. static int __init max8907_regulator_init(void)
  334. {
  335. return platform_driver_register(&max8907_regulator_driver);
  336. }
  337. subsys_initcall(max8907_regulator_init);
  338. static void __exit max8907_reg_exit(void)
  339. {
  340. platform_driver_unregister(&max8907_regulator_driver);
  341. }
  342. module_exit(max8907_reg_exit);
  343. MODULE_DESCRIPTION("MAX8907 regulator driver");
  344. MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");
  345. MODULE_LICENSE("GPL v2");
  346. MODULE_ALIAS("platform:max8907-regulator");