pmic_tps65910_dm.c 2.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) EETS GmbH, 2017, Felix Brack <f.brack@eets.ch>
  4. */
  5. #include <common.h>
  6. #include <dm.h>
  7. #include <i2c.h>
  8. #include <log.h>
  9. #include <power/pmic.h>
  10. #include <power/regulator.h>
  11. #include <power/tps65910_pmic.h>
  12. static const struct pmic_child_info pmic_children_info[] = {
  13. { .prefix = "ldo_", .driver = TPS65910_LDO_DRIVER },
  14. { .prefix = "buck_", .driver = TPS65910_BUCK_DRIVER },
  15. { .prefix = "boost_", .driver = TPS65910_BOOST_DRIVER },
  16. { },
  17. };
  18. static int pmic_tps65910_reg_count(struct udevice *dev)
  19. {
  20. return TPS65910_NUM_REGS;
  21. }
  22. static int pmic_tps65910_write(struct udevice *dev, uint reg, const u8 *buffer,
  23. int len)
  24. {
  25. int ret;
  26. ret = dm_i2c_write(dev, reg, buffer, len);
  27. if (ret)
  28. pr_err("%s write error on register %02x\n", dev->name, reg);
  29. return ret;
  30. }
  31. static int pmic_tps65910_read(struct udevice *dev, uint reg, u8 *buffer,
  32. int len)
  33. {
  34. int ret;
  35. ret = dm_i2c_read(dev, reg, buffer, len);
  36. if (ret)
  37. pr_err("%s read error on register %02x\n", dev->name, reg);
  38. return ret;
  39. }
  40. static int pmic_tps65910_bind(struct udevice *dev)
  41. {
  42. ofnode regulators_node;
  43. int children;
  44. regulators_node = dev_read_subnode(dev, "regulators");
  45. if (!ofnode_valid(regulators_node)) {
  46. debug("%s regulators subnode not found\n", dev->name);
  47. return -EINVAL;
  48. }
  49. children = pmic_bind_children(dev, regulators_node, pmic_children_info);
  50. if (!children)
  51. debug("%s has no children (regulators)\n", dev->name);
  52. return 0;
  53. }
  54. static int pmic_tps65910_probe(struct udevice *dev)
  55. {
  56. /* use I2C control interface instead of I2C smartreflex interface to
  57. * access smartrefelex registers VDD1_OP_REG, VDD1_SR_REG, VDD2_OP_REG
  58. * and VDD2_SR_REG
  59. */
  60. return pmic_clrsetbits(dev, TPS65910_REG_DEVICE_CTRL, 0,
  61. TPS65910_I2C_SEL_MASK);
  62. }
  63. static struct dm_pmic_ops pmic_tps65910_ops = {
  64. .reg_count = pmic_tps65910_reg_count,
  65. .read = pmic_tps65910_read,
  66. .write = pmic_tps65910_write,
  67. };
  68. static const struct udevice_id pmic_tps65910_match[] = {
  69. { .compatible = "ti,tps65910" },
  70. { /* sentinel */ }
  71. };
  72. U_BOOT_DRIVER(pmic_tps65910) = {
  73. .name = "pmic_tps65910",
  74. .id = UCLASS_PMIC,
  75. .of_match = pmic_tps65910_match,
  76. .bind = pmic_tps65910_bind,
  77. .probe = pmic_tps65910_probe,
  78. .ops = &pmic_tps65910_ops,
  79. };