lp873x_regulator.c 6.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2016
  4. * Texas Instruments Incorporated, <www.ti.com>
  5. *
  6. * Keerthy <j-keerthy@ti.com>
  7. */
  8. #include <common.h>
  9. #include <fdtdec.h>
  10. #include <errno.h>
  11. #include <dm.h>
  12. #include <i2c.h>
  13. #include <power/pmic.h>
  14. #include <power/regulator.h>
  15. #include <power/lp873x.h>
  16. static const char lp873x_buck_ctrl[LP873X_BUCK_NUM] = {0x2, 0x4};
  17. static const char lp873x_buck_volt[LP873X_BUCK_NUM] = {0x6, 0x7};
  18. static const char lp873x_ldo_ctrl[LP873X_LDO_NUM] = {0x8, 0x9};
  19. static const char lp873x_ldo_volt[LP873X_LDO_NUM] = {0xA, 0xB};
  20. static int lp873x_buck_enable(struct udevice *dev, int op, bool *enable)
  21. {
  22. int ret;
  23. unsigned int adr;
  24. struct dm_regulator_uclass_plat *uc_pdata;
  25. uc_pdata = dev_get_uclass_plat(dev);
  26. adr = uc_pdata->ctrl_reg;
  27. ret = pmic_reg_read(dev->parent, adr);
  28. if (ret < 0)
  29. return ret;
  30. if (op == PMIC_OP_GET) {
  31. ret &= LP873X_BUCK_MODE_MASK;
  32. if (ret)
  33. *enable = true;
  34. else
  35. *enable = false;
  36. return 0;
  37. } else if (op == PMIC_OP_SET) {
  38. if (*enable)
  39. ret |= LP873X_BUCK_MODE_MASK;
  40. else
  41. ret &= ~(LP873X_BUCK_MODE_MASK);
  42. ret = pmic_reg_write(dev->parent, adr, ret);
  43. if (ret)
  44. return ret;
  45. }
  46. return 0;
  47. }
  48. static int lp873x_buck_volt2hex(int uV)
  49. {
  50. if (uV > LP873X_BUCK_VOLT_MAX)
  51. return -EINVAL;
  52. else if (uV > 1400000)
  53. return (uV - 1420000) / 20000 + 0x9E;
  54. else if (uV > 730000)
  55. return (uV - 735000) / 5000 + 0x18;
  56. else if (uV >= 700000)
  57. return (uV - 700000) / 10000 + 0x1;
  58. else
  59. return -EINVAL;
  60. }
  61. static int lp873x_buck_hex2volt(int hex)
  62. {
  63. if (hex > LP873X_BUCK_VOLT_MAX_HEX)
  64. return -EINVAL;
  65. else if (hex > 0x9D)
  66. return 1400000 + (hex - 0x9D) * 20000;
  67. else if (hex > 0x17)
  68. return 730000 + (hex - 0x17) * 5000;
  69. else if (hex >= 0x14)
  70. return 700000 + (hex - 0x14) * 10000;
  71. else
  72. return -EINVAL;
  73. }
  74. static int lp873x_buck_val(struct udevice *dev, int op, int *uV)
  75. {
  76. unsigned int hex, adr;
  77. int ret;
  78. struct dm_regulator_uclass_plat *uc_pdata;
  79. uc_pdata = dev_get_uclass_plat(dev);
  80. if (op == PMIC_OP_GET)
  81. *uV = 0;
  82. adr = uc_pdata->volt_reg;
  83. ret = pmic_reg_read(dev->parent, adr);
  84. if (ret < 0)
  85. return ret;
  86. if (op == PMIC_OP_GET) {
  87. ret &= LP873X_BUCK_VOLT_MASK;
  88. ret = lp873x_buck_hex2volt(ret);
  89. if (ret < 0)
  90. return ret;
  91. *uV = ret;
  92. return 0;
  93. }
  94. hex = lp873x_buck_volt2hex(*uV);
  95. if (hex < 0)
  96. return hex;
  97. ret &= 0x0;
  98. ret |= hex;
  99. ret = pmic_reg_write(dev->parent, adr, ret);
  100. return ret;
  101. }
  102. static int lp873x_ldo_enable(struct udevice *dev, int op, bool *enable)
  103. {
  104. int ret;
  105. unsigned int adr;
  106. struct dm_regulator_uclass_plat *uc_pdata;
  107. uc_pdata = dev_get_uclass_plat(dev);
  108. adr = uc_pdata->ctrl_reg;
  109. ret = pmic_reg_read(dev->parent, adr);
  110. if (ret < 0)
  111. return ret;
  112. if (op == PMIC_OP_GET) {
  113. ret &= LP873X_LDO_MODE_MASK;
  114. if (ret)
  115. *enable = true;
  116. else
  117. *enable = false;
  118. return 0;
  119. } else if (op == PMIC_OP_SET) {
  120. if (*enable)
  121. ret |= LP873X_LDO_MODE_MASK;
  122. else
  123. ret &= ~(LP873X_LDO_MODE_MASK);
  124. ret = pmic_reg_write(dev->parent, adr, ret);
  125. if (ret)
  126. return ret;
  127. }
  128. return 0;
  129. }
  130. static int lp873x_ldo_volt2hex(int uV)
  131. {
  132. if (uV > LP873X_LDO_VOLT_MAX)
  133. return -EINVAL;
  134. return (uV - 800000) / 100000;
  135. }
  136. static int lp873x_ldo_hex2volt(int hex)
  137. {
  138. if (hex > LP873X_LDO_VOLT_MAX_HEX)
  139. return -EINVAL;
  140. if (!hex)
  141. return 0;
  142. return (hex * 100000) + 800000;
  143. }
  144. static int lp873x_ldo_val(struct udevice *dev, int op, int *uV)
  145. {
  146. unsigned int hex, adr;
  147. int ret;
  148. struct dm_regulator_uclass_plat *uc_pdata;
  149. if (op == PMIC_OP_GET)
  150. *uV = 0;
  151. uc_pdata = dev_get_uclass_plat(dev);
  152. adr = uc_pdata->volt_reg;
  153. ret = pmic_reg_read(dev->parent, adr);
  154. if (ret < 0)
  155. return ret;
  156. if (op == PMIC_OP_GET) {
  157. ret &= LP873X_LDO_VOLT_MASK;
  158. ret = lp873x_ldo_hex2volt(ret);
  159. if (ret < 0)
  160. return ret;
  161. *uV = ret;
  162. return 0;
  163. }
  164. hex = lp873x_ldo_volt2hex(*uV);
  165. if (hex < 0)
  166. return hex;
  167. ret &= ~LP873X_LDO_VOLT_MASK;
  168. ret |= hex;
  169. if (*uV > 1650000)
  170. ret |= 0x80;
  171. ret = pmic_reg_write(dev->parent, adr, ret);
  172. return ret;
  173. }
  174. static int lp873x_ldo_probe(struct udevice *dev)
  175. {
  176. struct dm_regulator_uclass_plat *uc_pdata;
  177. uc_pdata = dev_get_uclass_plat(dev);
  178. uc_pdata->type = REGULATOR_TYPE_LDO;
  179. int idx = dev->driver_data;
  180. if (idx >= LP873X_LDO_NUM) {
  181. printf("Wrong ID for regulator\n");
  182. return -1;
  183. }
  184. uc_pdata->ctrl_reg = lp873x_ldo_ctrl[idx];
  185. uc_pdata->volt_reg = lp873x_ldo_volt[idx];
  186. return 0;
  187. }
  188. static int ldo_get_value(struct udevice *dev)
  189. {
  190. int uV;
  191. int ret;
  192. ret = lp873x_ldo_val(dev, PMIC_OP_GET, &uV);
  193. if (ret)
  194. return ret;
  195. return uV;
  196. }
  197. static int ldo_set_value(struct udevice *dev, int uV)
  198. {
  199. return lp873x_ldo_val(dev, PMIC_OP_SET, &uV);
  200. }
  201. static int ldo_get_enable(struct udevice *dev)
  202. {
  203. bool enable = false;
  204. int ret;
  205. ret = lp873x_ldo_enable(dev, PMIC_OP_GET, &enable);
  206. if (ret)
  207. return ret;
  208. return enable;
  209. }
  210. static int ldo_set_enable(struct udevice *dev, bool enable)
  211. {
  212. return lp873x_ldo_enable(dev, PMIC_OP_SET, &enable);
  213. }
  214. static int lp873x_buck_probe(struct udevice *dev)
  215. {
  216. struct dm_regulator_uclass_plat *uc_pdata;
  217. int idx;
  218. uc_pdata = dev_get_uclass_plat(dev);
  219. uc_pdata->type = REGULATOR_TYPE_BUCK;
  220. idx = dev->driver_data;
  221. if (idx >= LP873X_BUCK_NUM) {
  222. printf("Wrong ID for regulator\n");
  223. return -1;
  224. }
  225. uc_pdata->ctrl_reg = lp873x_buck_ctrl[idx];
  226. uc_pdata->volt_reg = lp873x_buck_volt[idx];
  227. return 0;
  228. }
  229. static int buck_get_value(struct udevice *dev)
  230. {
  231. int uV;
  232. int ret;
  233. ret = lp873x_buck_val(dev, PMIC_OP_GET, &uV);
  234. if (ret)
  235. return ret;
  236. return uV;
  237. }
  238. static int buck_set_value(struct udevice *dev, int uV)
  239. {
  240. return lp873x_buck_val(dev, PMIC_OP_SET, &uV);
  241. }
  242. static int buck_get_enable(struct udevice *dev)
  243. {
  244. bool enable = false;
  245. int ret;
  246. ret = lp873x_buck_enable(dev, PMIC_OP_GET, &enable);
  247. if (ret)
  248. return ret;
  249. return enable;
  250. }
  251. static int buck_set_enable(struct udevice *dev, bool enable)
  252. {
  253. return lp873x_buck_enable(dev, PMIC_OP_SET, &enable);
  254. }
  255. static const struct dm_regulator_ops lp873x_ldo_ops = {
  256. .get_value = ldo_get_value,
  257. .set_value = ldo_set_value,
  258. .get_enable = ldo_get_enable,
  259. .set_enable = ldo_set_enable,
  260. };
  261. U_BOOT_DRIVER(lp873x_ldo) = {
  262. .name = LP873X_LDO_DRIVER,
  263. .id = UCLASS_REGULATOR,
  264. .ops = &lp873x_ldo_ops,
  265. .probe = lp873x_ldo_probe,
  266. };
  267. static const struct dm_regulator_ops lp873x_buck_ops = {
  268. .get_value = buck_get_value,
  269. .set_value = buck_set_value,
  270. .get_enable = buck_get_enable,
  271. .set_enable = buck_set_enable,
  272. };
  273. U_BOOT_DRIVER(lp873x_buck) = {
  274. .name = LP873X_BUCK_DRIVER,
  275. .id = UCLASS_REGULATOR,
  276. .ops = &lp873x_buck_ops,
  277. .probe = lp873x_buck_probe,
  278. };