arizona-micsupp.c 9.9 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. //
  3. // arizona-micsupp.c -- Microphone supply for Arizona devices
  4. //
  5. // Copyright 2012 Wolfson Microelectronics PLC.
  6. //
  7. // Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  8. #include <linux/module.h>
  9. #include <linux/moduleparam.h>
  10. #include <linux/init.h>
  11. #include <linux/bitops.h>
  12. #include <linux/err.h>
  13. #include <linux/of.h>
  14. #include <linux/platform_device.h>
  15. #include <linux/regulator/driver.h>
  16. #include <linux/regulator/machine.h>
  17. #include <linux/regulator/of_regulator.h>
  18. #include <linux/slab.h>
  19. #include <linux/workqueue.h>
  20. #include <sound/soc.h>
  21. #include <linux/mfd/arizona/core.h>
  22. #include <linux/mfd/arizona/pdata.h>
  23. #include <linux/mfd/arizona/registers.h>
  24. #include <linux/mfd/madera/core.h>
  25. #include <linux/mfd/madera/pdata.h>
  26. #include <linux/mfd/madera/registers.h>
  27. #include <linux/regulator/arizona-micsupp.h>
  28. struct arizona_micsupp {
  29. struct regulator_dev *regulator;
  30. struct regmap *regmap;
  31. struct snd_soc_dapm_context **dapm;
  32. unsigned int enable_reg;
  33. struct device *dev;
  34. struct regulator_consumer_supply supply;
  35. struct regulator_init_data init_data;
  36. struct work_struct check_cp_work;
  37. };
  38. static void arizona_micsupp_check_cp(struct work_struct *work)
  39. {
  40. struct arizona_micsupp *micsupp =
  41. container_of(work, struct arizona_micsupp, check_cp_work);
  42. struct snd_soc_dapm_context *dapm = *micsupp->dapm;
  43. struct snd_soc_component *component;
  44. unsigned int val;
  45. int ret;
  46. ret = regmap_read(micsupp->regmap, micsupp->enable_reg, &val);
  47. if (ret != 0) {
  48. dev_err(micsupp->dev,
  49. "Failed to read CP state: %d\n", ret);
  50. return;
  51. }
  52. if (dapm) {
  53. component = snd_soc_dapm_to_component(dapm);
  54. if ((val & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) ==
  55. ARIZONA_CPMIC_ENA)
  56. snd_soc_component_force_enable_pin(component,
  57. "MICSUPP");
  58. else
  59. snd_soc_component_disable_pin(component, "MICSUPP");
  60. snd_soc_dapm_sync(dapm);
  61. }
  62. }
  63. static int arizona_micsupp_enable(struct regulator_dev *rdev)
  64. {
  65. struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
  66. int ret;
  67. ret = regulator_enable_regmap(rdev);
  68. if (ret == 0)
  69. schedule_work(&micsupp->check_cp_work);
  70. return ret;
  71. }
  72. static int arizona_micsupp_disable(struct regulator_dev *rdev)
  73. {
  74. struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
  75. int ret;
  76. ret = regulator_disable_regmap(rdev);
  77. if (ret == 0)
  78. schedule_work(&micsupp->check_cp_work);
  79. return ret;
  80. }
  81. static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
  82. {
  83. struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
  84. int ret;
  85. ret = regulator_set_bypass_regmap(rdev, ena);
  86. if (ret == 0)
  87. schedule_work(&micsupp->check_cp_work);
  88. return ret;
  89. }
  90. static const struct regulator_ops arizona_micsupp_ops = {
  91. .enable = arizona_micsupp_enable,
  92. .disable = arizona_micsupp_disable,
  93. .is_enabled = regulator_is_enabled_regmap,
  94. .list_voltage = regulator_list_voltage_linear_range,
  95. .map_voltage = regulator_map_voltage_linear_range,
  96. .get_voltage_sel = regulator_get_voltage_sel_regmap,
  97. .set_voltage_sel = regulator_set_voltage_sel_regmap,
  98. .get_bypass = regulator_get_bypass_regmap,
  99. .set_bypass = arizona_micsupp_set_bypass,
  100. };
  101. static const struct linear_range arizona_micsupp_ranges[] = {
  102. REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000),
  103. REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
  104. };
  105. static const struct regulator_desc arizona_micsupp = {
  106. .name = "MICVDD",
  107. .supply_name = "CPVDD",
  108. .type = REGULATOR_VOLTAGE,
  109. .n_voltages = 32,
  110. .ops = &arizona_micsupp_ops,
  111. .vsel_reg = ARIZONA_LDO2_CONTROL_1,
  112. .vsel_mask = ARIZONA_LDO2_VSEL_MASK,
  113. .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
  114. .enable_mask = ARIZONA_CPMIC_ENA,
  115. .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
  116. .bypass_mask = ARIZONA_CPMIC_BYPASS,
  117. .linear_ranges = arizona_micsupp_ranges,
  118. .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),
  119. .enable_time = 3000,
  120. .owner = THIS_MODULE,
  121. };
  122. static const struct linear_range arizona_micsupp_ext_ranges[] = {
  123. REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000),
  124. REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
  125. };
  126. static const struct regulator_desc arizona_micsupp_ext = {
  127. .name = "MICVDD",
  128. .supply_name = "CPVDD",
  129. .type = REGULATOR_VOLTAGE,
  130. .n_voltages = 40,
  131. .ops = &arizona_micsupp_ops,
  132. .vsel_reg = ARIZONA_LDO2_CONTROL_1,
  133. .vsel_mask = ARIZONA_LDO2_VSEL_MASK,
  134. .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
  135. .enable_mask = ARIZONA_CPMIC_ENA,
  136. .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
  137. .bypass_mask = ARIZONA_CPMIC_BYPASS,
  138. .linear_ranges = arizona_micsupp_ext_ranges,
  139. .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
  140. .enable_time = 3000,
  141. .owner = THIS_MODULE,
  142. };
  143. static const struct regulator_init_data arizona_micsupp_default = {
  144. .constraints = {
  145. .valid_ops_mask = REGULATOR_CHANGE_STATUS |
  146. REGULATOR_CHANGE_VOLTAGE |
  147. REGULATOR_CHANGE_BYPASS,
  148. .min_uV = 1700000,
  149. .max_uV = 3300000,
  150. },
  151. .num_consumer_supplies = 1,
  152. };
  153. static const struct regulator_init_data arizona_micsupp_ext_default = {
  154. .constraints = {
  155. .valid_ops_mask = REGULATOR_CHANGE_STATUS |
  156. REGULATOR_CHANGE_VOLTAGE |
  157. REGULATOR_CHANGE_BYPASS,
  158. .min_uV = 900000,
  159. .max_uV = 3300000,
  160. },
  161. .num_consumer_supplies = 1,
  162. };
  163. static const struct regulator_desc madera_micsupp = {
  164. .name = "MICVDD",
  165. .supply_name = "CPVDD1",
  166. .type = REGULATOR_VOLTAGE,
  167. .n_voltages = 40,
  168. .ops = &arizona_micsupp_ops,
  169. .vsel_reg = MADERA_LDO2_CONTROL_1,
  170. .vsel_mask = MADERA_LDO2_VSEL_MASK,
  171. .enable_reg = MADERA_MIC_CHARGE_PUMP_1,
  172. .enable_mask = MADERA_CPMIC_ENA,
  173. .bypass_reg = MADERA_MIC_CHARGE_PUMP_1,
  174. .bypass_mask = MADERA_CPMIC_BYPASS,
  175. .linear_ranges = arizona_micsupp_ext_ranges,
  176. .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
  177. .enable_time = 3000,
  178. .owner = THIS_MODULE,
  179. };
  180. static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata,
  181. struct regulator_config *config,
  182. const struct regulator_desc *desc)
  183. {
  184. struct arizona_micsupp *micsupp = config->driver_data;
  185. struct device_node *np;
  186. struct regulator_init_data *init_data;
  187. np = of_get_child_by_name(config->dev->of_node, "micvdd");
  188. if (np) {
  189. config->of_node = np;
  190. init_data = of_get_regulator_init_data(config->dev, np, desc);
  191. if (init_data) {
  192. init_data->consumer_supplies = &micsupp->supply;
  193. init_data->num_consumer_supplies = 1;
  194. pdata->init_data = init_data;
  195. }
  196. }
  197. return 0;
  198. }
  199. static int arizona_micsupp_common_init(struct platform_device *pdev,
  200. struct arizona_micsupp *micsupp,
  201. const struct regulator_desc *desc,
  202. struct arizona_micsupp_pdata *pdata)
  203. {
  204. struct regulator_config config = { };
  205. int ret;
  206. INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
  207. micsupp->init_data.consumer_supplies = &micsupp->supply;
  208. micsupp->supply.supply = "MICVDD";
  209. micsupp->supply.dev_name = dev_name(micsupp->dev);
  210. micsupp->enable_reg = desc->enable_reg;
  211. config.dev = micsupp->dev;
  212. config.driver_data = micsupp;
  213. config.regmap = micsupp->regmap;
  214. if (IS_ENABLED(CONFIG_OF)) {
  215. if (!dev_get_platdata(micsupp->dev)) {
  216. ret = arizona_micsupp_of_get_pdata(pdata, &config,
  217. desc);
  218. if (ret < 0)
  219. return ret;
  220. }
  221. }
  222. if (pdata->init_data)
  223. config.init_data = pdata->init_data;
  224. else
  225. config.init_data = &micsupp->init_data;
  226. /* Default to regulated mode */
  227. regmap_update_bits(micsupp->regmap, micsupp->enable_reg,
  228. ARIZONA_CPMIC_BYPASS, 0);
  229. micsupp->regulator = devm_regulator_register(&pdev->dev,
  230. desc,
  231. &config);
  232. of_node_put(config.of_node);
  233. if (IS_ERR(micsupp->regulator)) {
  234. ret = PTR_ERR(micsupp->regulator);
  235. dev_err(micsupp->dev, "Failed to register mic supply: %d\n",
  236. ret);
  237. return ret;
  238. }
  239. platform_set_drvdata(pdev, micsupp);
  240. return 0;
  241. }
  242. static int arizona_micsupp_probe(struct platform_device *pdev)
  243. {
  244. struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
  245. const struct regulator_desc *desc;
  246. struct arizona_micsupp *micsupp;
  247. micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
  248. if (!micsupp)
  249. return -ENOMEM;
  250. micsupp->regmap = arizona->regmap;
  251. micsupp->dapm = &arizona->dapm;
  252. micsupp->dev = arizona->dev;
  253. /*
  254. * Since the chip usually supplies itself we provide some
  255. * default init_data for it. This will be overridden with
  256. * platform data if provided.
  257. */
  258. switch (arizona->type) {
  259. case WM5110:
  260. case WM8280:
  261. desc = &arizona_micsupp_ext;
  262. micsupp->init_data = arizona_micsupp_ext_default;
  263. break;
  264. default:
  265. desc = &arizona_micsupp;
  266. micsupp->init_data = arizona_micsupp_default;
  267. break;
  268. }
  269. return arizona_micsupp_common_init(pdev, micsupp, desc,
  270. &arizona->pdata.micvdd);
  271. }
  272. static int madera_micsupp_probe(struct platform_device *pdev)
  273. {
  274. struct madera *madera = dev_get_drvdata(pdev->dev.parent);
  275. struct arizona_micsupp *micsupp;
  276. micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
  277. if (!micsupp)
  278. return -ENOMEM;
  279. micsupp->regmap = madera->regmap;
  280. micsupp->dapm = &madera->dapm;
  281. micsupp->dev = madera->dev;
  282. micsupp->init_data = arizona_micsupp_ext_default;
  283. return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp,
  284. &madera->pdata.micvdd);
  285. }
  286. static struct platform_driver arizona_micsupp_driver = {
  287. .probe = arizona_micsupp_probe,
  288. .driver = {
  289. .name = "arizona-micsupp",
  290. },
  291. };
  292. static struct platform_driver madera_micsupp_driver = {
  293. .probe = madera_micsupp_probe,
  294. .driver = {
  295. .name = "madera-micsupp",
  296. },
  297. };
  298. static struct platform_driver * const arizona_micsupp_drivers[] = {
  299. &arizona_micsupp_driver,
  300. &madera_micsupp_driver,
  301. };
  302. static int __init arizona_micsupp_init(void)
  303. {
  304. return platform_register_drivers(arizona_micsupp_drivers,
  305. ARRAY_SIZE(arizona_micsupp_drivers));
  306. }
  307. module_init(arizona_micsupp_init);
  308. static void __exit arizona_micsupp_exit(void)
  309. {
  310. platform_unregister_drivers(arizona_micsupp_drivers,
  311. ARRAY_SIZE(arizona_micsupp_drivers));
  312. }
  313. module_exit(arizona_micsupp_exit);
  314. /* Module information */
  315. MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
  316. MODULE_DESCRIPTION("Arizona microphone supply driver");
  317. MODULE_LICENSE("GPL");
  318. MODULE_ALIAS("platform:arizona-micsupp");
  319. MODULE_ALIAS("platform:madera-micsupp");