esm_pmic.c 1.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * PMIC Error Signal Monitor driver
  4. *
  5. * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
  6. * Tero Kristo <t-kristo@ti.com>
  7. *
  8. */
  9. #include <common.h>
  10. #include <dm.h>
  11. #include <errno.h>
  12. #include <power/pmic.h>
  13. #include <dm/device_compat.h>
  14. #include <linux/bitops.h>
  15. #define INT_ESM_REG 0x6c
  16. #define INT_ESM_MASK 0x3f
  17. #define ESM_MCU_START_REG 0x8f
  18. #define ESM_MCU_START BIT(0)
  19. #define ESM_MCU_MODE_CFG_REG 0x92
  20. #define ESM_MCU_EN BIT(6)
  21. #define ESM_MCU_ENDRV BIT(5)
  22. /**
  23. * pmic_esm_probe: configures and enables PMIC ESM functionality
  24. *
  25. * Configures ESM PMIC support and enables it.
  26. */
  27. static int pmic_esm_probe(struct udevice *dev)
  28. {
  29. int ret;
  30. ret = pmic_reg_write(dev->parent, INT_ESM_REG, INT_ESM_MASK);
  31. if (ret) {
  32. dev_err(dev, "clearing ESM irqs failed: %d\n", ret);
  33. return ret;
  34. }
  35. ret = pmic_reg_write(dev->parent, ESM_MCU_MODE_CFG_REG,
  36. ESM_MCU_EN | ESM_MCU_ENDRV);
  37. if (ret) {
  38. dev_err(dev, "setting ESM mode failed: %d\n", ret);
  39. return ret;
  40. }
  41. ret = pmic_reg_write(dev->parent, ESM_MCU_START_REG, ESM_MCU_START);
  42. if (ret) {
  43. dev_err(dev, "starting ESM failed: %d\n", ret);
  44. return ret;
  45. }
  46. return 0;
  47. }
  48. static const struct udevice_id pmic_esm_ids[] = {
  49. { .compatible = "ti,tps659413-esm" },
  50. {}
  51. };
  52. U_BOOT_DRIVER(pmic_esm) = {
  53. .name = "esm_pmic",
  54. .of_match = pmic_esm_ids,
  55. .id = UCLASS_MISC,
  56. .probe = pmic_esm_probe,
  57. };