mp5416.c 7.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. //
  3. // mp5416.c - regulator driver for mps mp5416
  4. //
  5. // Copyright 2020 Monolithic Power Systems, Inc
  6. //
  7. // Author: Saravanan Sekar <[email protected]>
  8. #include <linux/err.h>
  9. #include <linux/i2c.h>
  10. #include <linux/init.h>
  11. #include <linux/module.h>
  12. #include <linux/of_device.h>
  13. #include <linux/platform_device.h>
  14. #include <linux/regmap.h>
  15. #include <linux/regulator/driver.h>
  16. #define MP5416_REG_CTL0 0x00
  17. #define MP5416_REG_CTL1 0x01
  18. #define MP5416_REG_CTL2 0x02
  19. #define MP5416_REG_ILIM 0x03
  20. #define MP5416_REG_BUCK1 0x04
  21. #define MP5416_REG_BUCK2 0x05
  22. #define MP5416_REG_BUCK3 0x06
  23. #define MP5416_REG_BUCK4 0x07
  24. #define MP5416_REG_LDO1 0x08
  25. #define MP5416_REG_LDO2 0x09
  26. #define MP5416_REG_LDO3 0x0a
  27. #define MP5416_REG_LDO4 0x0b
  28. #define MP5416_REGULATOR_EN BIT(7)
  29. #define MP5416_MASK_VSET 0x7f
  30. #define MP5416_MASK_BUCK1_ILIM 0xc0
  31. #define MP5416_MASK_BUCK2_ILIM 0x0c
  32. #define MP5416_MASK_BUCK3_ILIM 0x30
  33. #define MP5416_MASK_BUCK4_ILIM 0x03
  34. #define MP5416_MASK_DVS_SLEWRATE 0xc0
  35. /* values in uV */
  36. #define MP5416_VOLT1_MIN 600000
  37. #define MP5416_VOLT1_MAX 2187500
  38. #define MP5416_VOLT1_STEP 12500
  39. #define MP5416_VOLT2_MIN 800000
  40. #define MP5416_VOLT2_MAX 3975000
  41. #define MP5416_VOLT2_STEP 25000
  42. #define MP5416_VOLT1_RANGE \
  43. ((MP5416_VOLT1_MAX - MP5416_VOLT1_MIN)/MP5416_VOLT1_STEP + 1)
  44. #define MP5416_VOLT2_RANGE \
  45. ((MP5416_VOLT2_MAX - MP5416_VOLT2_MIN)/MP5416_VOLT2_STEP + 1)
  46. #define MP5416BUCK(_name, _id, _ilim, _dreg, _dval, _vsel) \
  47. [MP5416_BUCK ## _id] = { \
  48. .id = MP5416_BUCK ## _id, \
  49. .name = _name, \
  50. .of_match = _name, \
  51. .regulators_node = "regulators", \
  52. .ops = &mp5416_buck_ops, \
  53. .min_uV = MP5416_VOLT ##_vsel## _MIN, \
  54. .uV_step = MP5416_VOLT ##_vsel## _STEP, \
  55. .n_voltages = MP5416_VOLT ##_vsel## _RANGE, \
  56. .curr_table = _ilim, \
  57. .n_current_limits = ARRAY_SIZE(_ilim), \
  58. .csel_reg = MP5416_REG_ILIM, \
  59. .csel_mask = MP5416_MASK_BUCK ## _id ##_ILIM, \
  60. .vsel_reg = MP5416_REG_BUCK ## _id, \
  61. .vsel_mask = MP5416_MASK_VSET, \
  62. .enable_reg = MP5416_REG_BUCK ## _id, \
  63. .enable_mask = MP5416_REGULATOR_EN, \
  64. .ramp_reg = MP5416_REG_CTL2, \
  65. .ramp_mask = MP5416_MASK_DVS_SLEWRATE, \
  66. .ramp_delay_table = mp5416_buck_ramp_table, \
  67. .n_ramp_values = ARRAY_SIZE(mp5416_buck_ramp_table), \
  68. .active_discharge_on = _dval, \
  69. .active_discharge_reg = _dreg, \
  70. .active_discharge_mask = _dval, \
  71. .owner = THIS_MODULE, \
  72. }
  73. #define MP5416LDO(_name, _id, _dval) \
  74. [MP5416_LDO ## _id] = { \
  75. .id = MP5416_LDO ## _id, \
  76. .name = _name, \
  77. .of_match = _name, \
  78. .regulators_node = "regulators", \
  79. .ops = &mp5416_ldo_ops, \
  80. .min_uV = MP5416_VOLT2_MIN, \
  81. .uV_step = MP5416_VOLT2_STEP, \
  82. .n_voltages = MP5416_VOLT2_RANGE, \
  83. .vsel_reg = MP5416_REG_LDO ##_id, \
  84. .vsel_mask = MP5416_MASK_VSET, \
  85. .enable_reg = MP5416_REG_LDO ##_id, \
  86. .enable_mask = MP5416_REGULATOR_EN, \
  87. .active_discharge_on = _dval, \
  88. .active_discharge_reg = MP5416_REG_CTL2, \
  89. .active_discharge_mask = _dval, \
  90. .owner = THIS_MODULE, \
  91. }
  92. enum mp5416_regulators {
  93. MP5416_BUCK1,
  94. MP5416_BUCK2,
  95. MP5416_BUCK3,
  96. MP5416_BUCK4,
  97. MP5416_LDO1,
  98. MP5416_LDO2,
  99. MP5416_LDO3,
  100. MP5416_LDO4,
  101. MP5416_MAX_REGULATORS,
  102. };
  103. static const struct regmap_config mp5416_regmap_config = {
  104. .reg_bits = 8,
  105. .val_bits = 8,
  106. .max_register = 0x0d,
  107. };
  108. /* Current limits array (in uA)
  109. * ILIM1 & ILIM3
  110. */
  111. static const unsigned int mp5416_I_limits1[] = {
  112. 3800000, 4600000, 5600000, 6800000
  113. };
  114. /* ILIM2 & ILIM4 */
  115. static const unsigned int mp5416_I_limits2[] = {
  116. 2200000, 3200000, 4200000, 5200000
  117. };
  118. /*
  119. * DVS ramp rate BUCK1 to BUCK4
  120. * 00: 32mV/us
  121. * 01: 16mV/us
  122. * 10: 8mV/us
  123. * 11: 4mV/us
  124. */
  125. static const unsigned int mp5416_buck_ramp_table[] = {
  126. 32000, 16000, 8000, 4000
  127. };
  128. static const struct regulator_ops mp5416_ldo_ops = {
  129. .enable = regulator_enable_regmap,
  130. .disable = regulator_disable_regmap,
  131. .is_enabled = regulator_is_enabled_regmap,
  132. .list_voltage = regulator_list_voltage_linear,
  133. .map_voltage = regulator_map_voltage_linear,
  134. .get_voltage_sel = regulator_get_voltage_sel_regmap,
  135. .set_voltage_sel = regulator_set_voltage_sel_regmap,
  136. .set_active_discharge = regulator_set_active_discharge_regmap,
  137. };
  138. static const struct regulator_ops mp5416_buck_ops = {
  139. .enable = regulator_enable_regmap,
  140. .disable = regulator_disable_regmap,
  141. .is_enabled = regulator_is_enabled_regmap,
  142. .list_voltage = regulator_list_voltage_linear,
  143. .map_voltage = regulator_map_voltage_linear,
  144. .get_voltage_sel = regulator_get_voltage_sel_regmap,
  145. .set_voltage_sel = regulator_set_voltage_sel_regmap,
  146. .set_active_discharge = regulator_set_active_discharge_regmap,
  147. .get_current_limit = regulator_get_current_limit_regmap,
  148. .set_current_limit = regulator_set_current_limit_regmap,
  149. .set_ramp_delay = regulator_set_ramp_delay_regmap,
  150. };
  151. static struct regulator_desc mp5416_regulators_desc[MP5416_MAX_REGULATORS] = {
  152. MP5416BUCK("buck1", 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1),
  153. MP5416BUCK("buck2", 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 2),
  154. MP5416BUCK("buck3", 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1),
  155. MP5416BUCK("buck4", 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 2),
  156. MP5416LDO("ldo1", 1, BIT(4)),
  157. MP5416LDO("ldo2", 2, BIT(3)),
  158. MP5416LDO("ldo3", 3, BIT(2)),
  159. MP5416LDO("ldo4", 4, BIT(1)),
  160. };
  161. static struct regulator_desc mp5496_regulators_desc[MP5416_MAX_REGULATORS] = {
  162. MP5416BUCK("buck1", 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1),
  163. MP5416BUCK("buck2", 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 1),
  164. MP5416BUCK("buck3", 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1),
  165. MP5416BUCK("buck4", 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 1),
  166. MP5416LDO("ldo1", 1, BIT(4)),
  167. MP5416LDO("ldo2", 2, BIT(3)),
  168. MP5416LDO("ldo3", 3, BIT(2)),
  169. MP5416LDO("ldo4", 4, BIT(1)),
  170. };
  171. static int mp5416_i2c_probe(struct i2c_client *client)
  172. {
  173. struct device *dev = &client->dev;
  174. struct regulator_config config = { NULL, };
  175. static const struct regulator_desc *desc;
  176. struct regulator_dev *rdev;
  177. struct regmap *regmap;
  178. int i;
  179. regmap = devm_regmap_init_i2c(client, &mp5416_regmap_config);
  180. if (IS_ERR(regmap)) {
  181. dev_err(dev, "Failed to allocate regmap!\n");
  182. return PTR_ERR(regmap);
  183. }
  184. desc = of_device_get_match_data(dev);
  185. if (!desc)
  186. return -ENODEV;
  187. config.dev = dev;
  188. config.regmap = regmap;
  189. for (i = 0; i < MP5416_MAX_REGULATORS; i++) {
  190. rdev = devm_regulator_register(dev,
  191. &desc[i],
  192. &config);
  193. if (IS_ERR(rdev)) {
  194. dev_err(dev, "Failed to register regulator!\n");
  195. return PTR_ERR(rdev);
  196. }
  197. }
  198. return 0;
  199. }
  200. static const struct of_device_id mp5416_of_match[] = {
  201. { .compatible = "mps,mp5416", .data = &mp5416_regulators_desc },
  202. { .compatible = "mps,mp5496", .data = &mp5496_regulators_desc },
  203. {},
  204. };
  205. MODULE_DEVICE_TABLE(of, mp5416_of_match);
  206. static const struct i2c_device_id mp5416_id[] = {
  207. { "mp5416", },
  208. { "mp5496", },
  209. { },
  210. };
  211. MODULE_DEVICE_TABLE(i2c, mp5416_id);
  212. static struct i2c_driver mp5416_regulator_driver = {
  213. .driver = {
  214. .name = "mp5416",
  215. .of_match_table = of_match_ptr(mp5416_of_match),
  216. },
  217. .probe_new = mp5416_i2c_probe,
  218. .id_table = mp5416_id,
  219. };
  220. module_i2c_driver(mp5416_regulator_driver);
  221. MODULE_AUTHOR("Saravanan Sekar <[email protected]>");
  222. MODULE_DESCRIPTION("MP5416 PMIC regulator driver");
  223. MODULE_LICENSE("GPL");