LXR uboot/drivers/hwspinlock/sandbox

   1// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
   2/*
   3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <hwspinlock.h>
   9#include <asm/state.h>
  10
  11static int sandbox_lock(struct udevice *dev, int index)
  12{
  13        struct sandbox_state *state = state_get_current();
  14
  15        if (index != 0)
  16                return -1;
  17
  18        if (state->hwspinlock)
  19                return -1;
  20
  21        state->hwspinlock = true;
  22
  23        return 0;
  24}
  25
  26static int sandbox_unlock(struct udevice *dev, int index)
  27{
  28        struct sandbox_state *state = state_get_current();
  29
  30        if (index != 0)
  31                return -1;
  32
  33        if (!state->hwspinlock)
  34                return -1;
  35
  36        state->hwspinlock = false;
  37
  38        return 0;
  39}
  40
  41static const struct hwspinlock_ops sandbox_hwspinlock_ops = {
  42        .lock = sandbox_lock,
  43        .unlock = sandbox_unlock,
  44};
  45
  46static const struct udevice_id sandbox_hwspinlock_ids[] = {
  47        { .compatible = "sandbox,hwspinlock" },
  48        {}
  49};
  50
  51U_BOOT_DRIVER(hwspinlock_sandbox) = {
  52        .name = "hwspinlock_sandbox",
  53        .id = UCLASS_HWSPINLOCK,
  54        .of_match = sandbox_hwspinlock_ids,
  55        .ops = &sandbox_hwspinlock_ops,
  56};
  57