sandbox_hwspinlock.c
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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
*/
#include <common.h>
#include <dm.h>
#include <hwspinlock.h>
#include <asm/state.h>
static int sandbox_lock(struct udevice *dev, int index)
{
struct sandbox_state *state = state_get_current();
if (index != 0)
return -1;
if (state->hwspinlock)
return -1;
state->hwspinlock = true;
return 0;
}
static int sandbox_unlock(struct udevice *dev, int index)
{
struct sandbox_state *state = state_get_current();
if (index != 0)
return -1;
if (!state->hwspinlock)
return -1;
state->hwspinlock = false;
return 0;
}
static const struct hwspinlock_ops sandbox_hwspinlock_ops = {
.lock = sandbox_lock,
.unlock = sandbox_unlock,
};
static const struct udevice_id sandbox_hwspinlock_ids[] = {
{ .compatible = "sandbox,hwspinlock" },
{}
};
U_BOOT_DRIVER(hwspinlock_sandbox) = {
.name = "hwspinlock_sandbox",
.id = UCLASS_HWSPINLOCK,
.of_match = sandbox_hwspinlock_ids,
.ops = &sandbox_hwspinlock_ops,
};