linux/drivers/hwspinlock/sun6i_hwspinlock.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * sun6i_hwspinlock.c - hardware spinlock driver for sun6i compatible Allwinner SoCs
 * Copyright (C) 2020 Wilken Gottwalt <[email protected]>
 */

#include <linux/clk.h>
#include <linux/debugfs.h>
#include <linux/errno.h>
#include <linux/hwspinlock.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>

#include "hwspinlock_internal.h"

#define DRIVER_NAME …

#define SPINLOCK_BASE_ID …
#define SPINLOCK_SYSSTATUS_REG …
#define SPINLOCK_LOCK_REGN …
#define SPINLOCK_NOTTAKEN …

struct sun6i_hwspinlock_data { … };

#ifdef CONFIG_DEBUG_FS

static int hwlocks_supported_show(struct seq_file *seqf, void *unused)
{ … }
DEFINE_SHOW_ATTRIBUTE(…);

static void sun6i_hwspinlock_debugfs_init(struct sun6i_hwspinlock_data *priv)
{ … }

#else

static void sun6i_hwspinlock_debugfs_init(struct sun6i_hwspinlock_data *priv)
{
}

#endif

static int sun6i_hwspinlock_trylock(struct hwspinlock *lock)
{ … }

static void sun6i_hwspinlock_unlock(struct hwspinlock *lock)
{ … }

static const struct hwspinlock_ops sun6i_hwspinlock_ops = …;

static void sun6i_hwspinlock_disable(void *data)
{ … }

static int sun6i_hwspinlock_probe(struct platform_device *pdev)
{ … }

static const struct of_device_id sun6i_hwspinlock_ids[] = …;
MODULE_DEVICE_TABLE(of, sun6i_hwspinlock_ids);

static struct platform_driver sun6i_hwspinlock_driver = …;
module_platform_driver(…) …;

MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;