irq_sandbox.c 2.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Sandbox driver for interrupts
  4. *
  5. * Copyright 2019 Google LLC
  6. */
  7. #include <common.h>
  8. #include <dm.h>
  9. #include <irq.h>
  10. #include <acpi/acpi_device.h>
  11. #include <asm/test.h>
  12. /**
  13. * struct sandbox_irq_priv - private data for this driver
  14. *
  15. * @count: Counts the number calls to the read_and_clear() method
  16. * @pending: true if an interrupt is pending, else false
  17. */
  18. struct sandbox_irq_priv {
  19. int count;
  20. bool pending;
  21. };
  22. static int sandbox_set_polarity(struct udevice *dev, uint irq, bool active_low)
  23. {
  24. if (irq > 10)
  25. return -EINVAL;
  26. return 0;
  27. }
  28. static int sandbox_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
  29. {
  30. if (pmc_gpe_num > 10)
  31. return -ENOENT;
  32. return pmc_gpe_num + 1;
  33. }
  34. static int sandbox_snapshot_polarities(struct udevice *dev)
  35. {
  36. return 0;
  37. }
  38. static int sandbox_restore_polarities(struct udevice *dev)
  39. {
  40. return 0;
  41. }
  42. static int sandbox_irq_read_and_clear(struct irq *irq)
  43. {
  44. struct sandbox_irq_priv *priv = dev_get_priv(irq->dev);
  45. if (irq->id != SANDBOX_IRQN_PEND)
  46. return -EINVAL;
  47. priv->count++;
  48. if (priv->pending) {
  49. priv->pending = false;
  50. return 1;
  51. }
  52. if (!(priv->count % 3))
  53. priv->pending = true;
  54. return 0;
  55. }
  56. static int sandbox_irq_of_xlate(struct irq *irq,
  57. struct ofnode_phandle_args *args)
  58. {
  59. irq->id = args->args[0];
  60. return 0;
  61. }
  62. static __maybe_unused int sandbox_get_acpi(const struct irq *irq,
  63. struct acpi_irq *acpi_irq)
  64. {
  65. acpi_irq->pin = irq->id;
  66. acpi_irq->mode = ACPI_IRQ_LEVEL_TRIGGERED;
  67. acpi_irq->polarity = ACPI_IRQ_ACTIVE_HIGH;
  68. acpi_irq->shared = ACPI_IRQ_SHARED;
  69. acpi_irq->wake = ACPI_IRQ_WAKE;
  70. return 0;
  71. }
  72. static const struct irq_ops sandbox_irq_ops = {
  73. .route_pmc_gpio_gpe = sandbox_route_pmc_gpio_gpe,
  74. .set_polarity = sandbox_set_polarity,
  75. .snapshot_polarities = sandbox_snapshot_polarities,
  76. .restore_polarities = sandbox_restore_polarities,
  77. .read_and_clear = sandbox_irq_read_and_clear,
  78. .of_xlate = sandbox_irq_of_xlate,
  79. #if CONFIG_IS_ENABLED(ACPIGEN)
  80. .get_acpi = sandbox_get_acpi,
  81. #endif
  82. };
  83. static const struct udevice_id sandbox_irq_ids[] = {
  84. { .compatible = "sandbox,irq", SANDBOX_IRQT_BASE },
  85. { }
  86. };
  87. U_BOOT_DRIVER(sandbox_irq_drv) = {
  88. .name = "sandbox_irq",
  89. .id = UCLASS_IRQ,
  90. .of_match = sandbox_irq_ids,
  91. .ops = &sandbox_irq_ops,
  92. .priv_auto_alloc_size = sizeof(struct sandbox_irq_priv),
  93. };