drivers/misc/irq_sandbox.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Sandbox driver for interrupts
   4  *
   5  * Copyright 2019 Google LLC
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <irq.h>
  11
  12 static int sandbox_set_polarity(struct udevice *dev, uint irq, bool active_low)
  13 {
  14         if (irq > 10)
  15                 return -EINVAL;
  16
  17         return 0;
  18 }
  19
  20 static int sandbox_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
  21 {
  22         if (pmc_gpe_num > 10)
  23                 return -ENOENT;
  24
  25         return pmc_gpe_num + 1;
  26 }
  27
  28 static int sandbox_snapshot_polarities(struct udevice *dev)
  29 {
  30         return 0;
  31 }
  32
  33 static int sandbox_restore_polarities(struct udevice *dev)
  34 {
  35         return 0;
  36 }
  37
  38 static const struct irq_ops sandbox_irq_ops = {
  39         .route_pmc_gpio_gpe     = sandbox_route_pmc_gpio_gpe,
  40         .set_polarity           = sandbox_set_polarity,
  41         .snapshot_polarities    = sandbox_snapshot_polarities,
  42         .restore_polarities     = sandbox_restore_polarities,
  43 };
  44
  45 static const struct udevice_id sandbox_irq_ids[] = {
  46         { .compatible = "sandbox,irq"},
  47         { }
  48 };
  49
  50 U_BOOT_DRIVER(sandbox_irq_drv) = {
  51         .name           = "sandbox_irq",
  52         .id             = UCLASS_IRQ,
  53         .of_match       = sandbox_irq_ids,
  54         .ops            = &sandbox_irq_ops,
  55 };