lp87565_regulator.c 3.7 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * (C) Copyright 2017
  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 <log.h>
  14. #include <power/pmic.h>
  15. #include <power/regulator.h>
  16. #include <power/lp87565.h>
  17. static const char lp87565_buck_ctrl1[LP87565_BUCK_NUM] = {0x2, 0x4, 0x6, 0x8, 0x2, 0x6};
  18. static const char lp87565_buck_vout[LP87565_BUCK_NUM] = {0xA, 0xC, 0xE, 0x10, 0xA, 0xE };
  19. static int lp87565_buck_enable(struct udevice *dev, int op, bool *enable)
  20. {
  21. int ret;
  22. unsigned int adr;
  23. struct dm_regulator_uclass_plat *uc_pdata;
  24. uc_pdata = dev_get_uclass_plat(dev);
  25. adr = uc_pdata->ctrl_reg;
  26. ret = pmic_reg_read(dev->parent, adr);
  27. if (ret < 0)
  28. return ret;
  29. if (op == PMIC_OP_GET) {
  30. ret &= LP87565_BUCK_MODE_MASK;
  31. if (ret)
  32. *enable = true;
  33. else
  34. *enable = false;
  35. return 0;
  36. } else if (op == PMIC_OP_SET) {
  37. if (*enable)
  38. ret |= LP87565_BUCK_MODE_MASK;
  39. else
  40. ret &= ~LP87565_BUCK_MODE_MASK;
  41. ret = pmic_reg_write(dev->parent, adr, ret);
  42. if (ret)
  43. return ret;
  44. }
  45. return 0;
  46. }
  47. static int lp87565_buck_volt2val(int uV)
  48. {
  49. if (uV > LP87565_BUCK_VOLT_MAX)
  50. return -EINVAL;
  51. else if (uV > 1400000)
  52. return (uV - 1420000) / 20000 + 0x9E;
  53. else if (uV > 730000)
  54. return (uV - 735000) / 5000 + 0x18;
  55. else if (uV >= 500000)
  56. return (uV - 500000) / 10000;
  57. else
  58. return -EINVAL;
  59. }
  60. static int lp87565_buck_val2volt(int val)
  61. {
  62. if (val > LP87565_BUCK_VOLT_MAX_HEX)
  63. return -EINVAL;
  64. else if (val > 0x9D)
  65. return 1400000 + (val - 0x9D) * 20000;
  66. else if (val > 0x17)
  67. return 730000 + (val - 0x17) * 5000;
  68. else if (val >= 0x0)
  69. return 500000 + val * 10000;
  70. else
  71. return -EINVAL;
  72. }
  73. static int lp87565_buck_val(struct udevice *dev, int op, int *uV)
  74. {
  75. unsigned int hex, adr;
  76. int ret;
  77. struct dm_regulator_uclass_plat *uc_pdata;
  78. uc_pdata = dev_get_uclass_plat(dev);
  79. if (op == PMIC_OP_GET)
  80. *uV = 0;
  81. adr = uc_pdata->volt_reg;
  82. ret = pmic_reg_read(dev->parent, adr);
  83. if (ret < 0)
  84. return ret;
  85. if (op == PMIC_OP_GET) {
  86. ret &= LP87565_BUCK_VOLT_MASK;
  87. ret = lp87565_buck_val2volt(ret);
  88. if (ret < 0)
  89. return ret;
  90. *uV = ret;
  91. return 0;
  92. }
  93. hex = lp87565_buck_volt2val(*uV);
  94. if (hex < 0)
  95. return hex;
  96. ret &= 0x0;
  97. ret = hex;
  98. ret = pmic_reg_write(dev->parent, adr, ret);
  99. return ret;
  100. }
  101. static int lp87565_buck_probe(struct udevice *dev)
  102. {
  103. struct dm_regulator_uclass_plat *uc_pdata;
  104. int idx;
  105. uc_pdata = dev_get_uclass_plat(dev);
  106. uc_pdata->type = REGULATOR_TYPE_BUCK;
  107. idx = dev->driver_data;
  108. if (idx == 0 || idx == 1 || idx == 2 || idx == 3) {
  109. debug("Single phase regulator\n");
  110. } else if (idx == 23) {
  111. idx = 5;
  112. } else if (idx == 10) {
  113. idx = 4;
  114. } else {
  115. printf("Wrong ID for regulator\n");
  116. return -EINVAL;
  117. }
  118. uc_pdata->ctrl_reg = lp87565_buck_ctrl1[idx];
  119. uc_pdata->volt_reg = lp87565_buck_vout[idx];
  120. return 0;
  121. }
  122. static int buck_get_value(struct udevice *dev)
  123. {
  124. int uV;
  125. int ret;
  126. ret = lp87565_buck_val(dev, PMIC_OP_GET, &uV);
  127. if (ret)
  128. return ret;
  129. return uV;
  130. }
  131. static int buck_set_value(struct udevice *dev, int uV)
  132. {
  133. return lp87565_buck_val(dev, PMIC_OP_SET, &uV);
  134. }
  135. static int buck_get_enable(struct udevice *dev)
  136. {
  137. bool enable = false;
  138. int ret;
  139. ret = lp87565_buck_enable(dev, PMIC_OP_GET, &enable);
  140. if (ret)
  141. return ret;
  142. return enable;
  143. }
  144. static int buck_set_enable(struct udevice *dev, bool enable)
  145. {
  146. return lp87565_buck_enable(dev, PMIC_OP_SET, &enable);
  147. }
  148. static const struct dm_regulator_ops lp87565_buck_ops = {
  149. .get_value = buck_get_value,
  150. .set_value = buck_set_value,
  151. .get_enable = buck_get_enable,
  152. .set_enable = buck_set_enable,
  153. };
  154. U_BOOT_DRIVER(lp87565_buck) = {
  155. .name = LP87565_BUCK_DRIVER,
  156. .id = UCLASS_REGULATOR,
  157. .ops = &lp87565_buck_ops,
  158. .probe = lp87565_buck_probe,
  159. };