starfive_regulator.c 3.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2023 Starfive, Inc.
  4. * Author: keith.zhao<keith.zhao@statfivetech.com>
  5. */
  6. #include <common.h>
  7. #include <fdtdec.h>
  8. #include <errno.h>
  9. #include <dm.h>
  10. #include <i2c.h>
  11. #include <power/pmic.h>
  12. #include <power/regulator.h>
  13. #include <power/lp873x.h>
  14. static const char lp873x_ldo_ctrl[LP873X_LDO_NUM] = {0x8, 0x9};
  15. static const char lp873x_ldo_volt[LP873X_LDO_NUM] = {0xA, 0xB};
  16. static int lp873x_ldo_enable(struct udevice *dev, int op, bool *enable)
  17. {
  18. int ret;
  19. unsigned int adr;
  20. struct dm_regulator_uclass_plat *uc_pdata;
  21. uc_pdata = dev_get_uclass_plat(dev);
  22. adr = uc_pdata->ctrl_reg;
  23. ret = pmic_reg_read(dev->parent, adr);
  24. if (ret < 0)
  25. return ret;
  26. if (op == PMIC_OP_GET) {
  27. ret &= LP873X_LDO_MODE_MASK;
  28. if (ret)
  29. *enable = true;
  30. else
  31. *enable = false;
  32. return 0;
  33. } else if (op == PMIC_OP_SET) {
  34. if (*enable)
  35. ret |= LP873X_LDO_MODE_MASK;
  36. else
  37. ret &= ~(LP873X_LDO_MODE_MASK);
  38. ret = pmic_reg_write(dev->parent, adr, ret);
  39. if (ret)
  40. return ret;
  41. }
  42. return 0;
  43. }
  44. static int lp873x_ldo_volt2hex(int uV)
  45. {
  46. if (uV > LP873X_LDO_VOLT_MAX)
  47. return -EINVAL;
  48. return (uV - 800000) / 100000;
  49. }
  50. static int lp873x_ldo_hex2volt(int hex)
  51. {
  52. if (hex > LP873X_LDO_VOLT_MAX_HEX)
  53. return -EINVAL;
  54. if (!hex)
  55. return 0;
  56. return (hex * 100000) + 800000;
  57. }
  58. static int lp873x_ldo_val(struct udevice *dev, int op, int *uV)
  59. {
  60. unsigned int hex, adr;
  61. int ret;
  62. struct dm_regulator_uclass_plat *uc_pdata;
  63. if (op == PMIC_OP_GET)
  64. *uV = 0;
  65. uc_pdata = dev_get_uclass_plat(dev);
  66. adr = uc_pdata->volt_reg;
  67. ret = pmic_reg_read(dev->parent, adr);
  68. if (ret < 0)
  69. return ret;
  70. if (op == PMIC_OP_GET) {
  71. ret &= LP873X_LDO_VOLT_MASK;
  72. ret = lp873x_ldo_hex2volt(ret);
  73. if (ret < 0)
  74. return ret;
  75. *uV = ret;
  76. return 0;
  77. }
  78. hex = lp873x_ldo_volt2hex(*uV);
  79. if (hex < 0)
  80. return hex;
  81. ret &= ~LP873X_LDO_VOLT_MASK;
  82. ret |= hex;
  83. if (*uV > 1650000)
  84. ret |= 0x80;
  85. ret = pmic_reg_write(dev->parent, adr, ret);
  86. return ret;
  87. }
  88. static int lp873x_ldo_probe(struct udevice *dev)
  89. {
  90. struct dm_regulator_uclass_plat *uc_pdata;
  91. uc_pdata = dev_get_uclass_plat(dev);
  92. uc_pdata->type = REGULATOR_TYPE_LDO;
  93. int idx = dev->driver_data;
  94. if (idx >= LP873X_LDO_NUM) {
  95. return -1;
  96. }
  97. uc_pdata->ctrl_reg = lp873x_ldo_ctrl[idx];
  98. uc_pdata->volt_reg = lp873x_ldo_volt[idx];
  99. return 0;
  100. }
  101. static int ldo_get_value(struct udevice *dev)
  102. {
  103. int uV;
  104. int ret;
  105. ret = lp873x_ldo_val(dev, PMIC_OP_GET, &uV);
  106. if (ret)
  107. return ret;
  108. return uV;
  109. }
  110. static int ldo_set_value(struct udevice *dev, int uV)
  111. {
  112. return lp873x_ldo_val(dev, PMIC_OP_SET, &uV);
  113. }
  114. static int ldo_get_enable(struct udevice *dev)
  115. {
  116. bool enable = false;
  117. int ret;
  118. ret = lp873x_ldo_enable(dev, PMIC_OP_GET, &enable);
  119. if (ret)
  120. return ret;
  121. return enable;
  122. }
  123. static int ldo_set_enable(struct udevice *dev, bool enable)
  124. {
  125. return lp873x_ldo_enable(dev, PMIC_OP_SET, &enable);
  126. }
  127. static const struct dm_regulator_ops lp873x_ldo_ops = {
  128. .get_value = ldo_get_value,
  129. .set_value = ldo_set_value,
  130. .get_enable = ldo_get_enable,
  131. .set_enable = ldo_set_enable,
  132. };
  133. U_BOOT_DRIVER(lp873x_ldo) = {
  134. .name = LP873X_LDO_DRIVER,
  135. .id = UCLASS_REGULATOR,
  136. .ops = &lp873x_ldo_ops,
  137. .probe = lp873x_ldo_probe,
  138. };