pca9450.c 2.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright 2019 NXP
  4. */
  5. #include <common.h>
  6. #include <fdtdec.h>
  7. #include <errno.h>
  8. #include <dm.h>
  9. #include <i2c.h>
  10. #include <log.h>
  11. #include <asm/global_data.h>
  12. #include <power/pmic.h>
  13. #include <power/regulator.h>
  14. #include <power/pca9450.h>
  15. DECLARE_GLOBAL_DATA_PTR;
  16. static const struct pmic_child_info pmic_children_info[] = {
  17. /* buck */
  18. { .prefix = "b", .driver = PCA9450_REGULATOR_DRIVER},
  19. /* ldo */
  20. { .prefix = "l", .driver = PCA9450_REGULATOR_DRIVER},
  21. { },
  22. };
  23. static int pca9450_reg_count(struct udevice *dev)
  24. {
  25. return PCA9450_REG_NUM;
  26. }
  27. static int pca9450_write(struct udevice *dev, uint reg, const uint8_t *buff,
  28. int len)
  29. {
  30. if (dm_i2c_write(dev, reg, buff, len)) {
  31. pr_err("write error to device: %p register: %#x!", dev, reg);
  32. return -EIO;
  33. }
  34. return 0;
  35. }
  36. static int pca9450_read(struct udevice *dev, uint reg, uint8_t *buff,
  37. int len)
  38. {
  39. if (dm_i2c_read(dev, reg, buff, len)) {
  40. pr_err("read error from device: %p register: %#x!", dev, reg);
  41. return -EIO;
  42. }
  43. return 0;
  44. }
  45. static int pca9450_bind(struct udevice *dev)
  46. {
  47. int children;
  48. ofnode regulators_node;
  49. regulators_node = dev_read_subnode(dev, "regulators");
  50. if (!ofnode_valid(regulators_node)) {
  51. debug("%s: %s regulators subnode not found!", __func__,
  52. dev->name);
  53. return -ENXIO;
  54. }
  55. debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  56. children = pmic_bind_children(dev, regulators_node,
  57. pmic_children_info);
  58. if (!children)
  59. debug("%s: %s - no child found\n", __func__, dev->name);
  60. /* Always return success for this device */
  61. return 0;
  62. }
  63. static struct dm_pmic_ops pca9450_ops = {
  64. .reg_count = pca9450_reg_count,
  65. .read = pca9450_read,
  66. .write = pca9450_write,
  67. };
  68. static const struct udevice_id pca9450_ids[] = {
  69. { .compatible = "nxp,pca9450a", .data = 0x25, },
  70. { .compatible = "nxp,pca9450b", .data = 0x25, },
  71. { }
  72. };
  73. U_BOOT_DRIVER(pmic_pca9450) = {
  74. .name = "pca9450 pmic",
  75. .id = UCLASS_PMIC,
  76. .of_match = pca9450_ids,
  77. .bind = pca9450_bind,
  78. .ops = &pca9450_ops,
  79. };