s5m8767.c 2.0 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2015 Google, Inc
  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 <power/pmic.h>
  12. #include <power/regulator.h>
  13. #include <power/s5m8767.h>
  14. static const struct pmic_child_info pmic_children_info[] = {
  15. { .prefix = "LDO", .driver = S5M8767_LDO_DRIVER },
  16. { .prefix = "BUCK", .driver = S5M8767_BUCK_DRIVER },
  17. { },
  18. };
  19. static int s5m8767_reg_count(struct udevice *dev)
  20. {
  21. return S5M8767_NUM_OF_REGS;
  22. }
  23. static int s5m8767_write(struct udevice *dev, uint reg, const uint8_t *buff,
  24. int len)
  25. {
  26. if (dm_i2c_write(dev, reg, buff, len)) {
  27. pr_err("write error to device: %p register: %#x!\n", dev, reg);
  28. return -EIO;
  29. }
  30. return 0;
  31. }
  32. static int s5m8767_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
  33. {
  34. if (dm_i2c_read(dev, reg, buff, len)) {
  35. pr_err("read error from device: %p register: %#x!\n", dev, reg);
  36. return -EIO;
  37. }
  38. return 0;
  39. }
  40. int s5m8767_enable_32khz_cp(struct udevice *dev)
  41. {
  42. return pmic_clrsetbits(dev, S5M8767_EN32KHZ_CP, 0, 1 << 1);
  43. }
  44. static int s5m8767_bind(struct udevice *dev)
  45. {
  46. int children;
  47. ofnode node;
  48. node = dev_read_subnode(dev, "regulators");
  49. if (!ofnode_valid(node)) {
  50. debug("%s: %s regulators subnode not found!\n", __func__,
  51. dev->name);
  52. return -ENXIO;
  53. }
  54. debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
  55. children = pmic_bind_children(dev, node, pmic_children_info);
  56. if (!children)
  57. debug("%s: %s - no child found\n", __func__, dev->name);
  58. /* Always return success for this device */
  59. return 0;
  60. }
  61. static struct dm_pmic_ops s5m8767_ops = {
  62. .reg_count = s5m8767_reg_count,
  63. .read = s5m8767_read,
  64. .write = s5m8767_write,
  65. };
  66. static const struct udevice_id s5m8767_ids[] = {
  67. { .compatible = "samsung,s5m8767-pmic" },
  68. { }
  69. };
  70. U_BOOT_DRIVER(pmic_s5m8767) = {
  71. .name = "s5m8767_pmic",
  72. .id = UCLASS_PMIC,
  73. .of_match = s5m8767_ids,
  74. .bind = s5m8767_bind,
  75. .ops = &s5m8767_ops,
  76. };