linux/drivers/watchdog/ie6xx_wdt.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *      Intel Atom E6xx Watchdog driver
 *
 *      Copyright (C) 2011 Alexander Stein
 *                <[email protected]>
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/watchdog.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
#include <linux/spinlock.h>

#define DRIVER_NAME …

#define PV1 …
#define PV2 …

#define RR0 …
#define RR1 …
#define WDT_RELOAD …
#define WDT_TOUT …

#define WDTCR …
#define WDT_PRE_SEL …
#define WDT_RESET_SEL …
#define WDT_RESET_EN …
#define WDT_TOUT_EN …

#define DCR …

#define WDTLR …
#define WDT_LOCK …
#define WDT_ENABLE …
#define WDT_TOUT_CNF …

#define MIN_TIME …
#define MAX_TIME …
#define DEFAULT_TIME …

static unsigned int timeout = …;
module_param(timeout, uint, 0);
MODULE_PARM_DESC(…) …;

static bool nowayout = … WATCHDOG_NOWAYOUT;
module_param(nowayout, bool, 0);
MODULE_PARM_DESC(…) …;

static u8 resetmode = …;
module_param(resetmode, byte, 0);
MODULE_PARM_DESC(…) …;

static struct { … } ie6xx_wdt_data;

/*
 * This is needed to write to preload and reload registers
 * struct ie6xx_wdt_data.unlock_sequence must be used
 * to prevent sequence interrupts
 */
static void ie6xx_wdt_unlock_registers(void)
{ … }

static int ie6xx_wdt_ping(struct watchdog_device *wdd)
{ … }

static int ie6xx_wdt_set_timeout(struct watchdog_device *wdd, unsigned int t)
{ … }

static int ie6xx_wdt_start(struct watchdog_device *wdd)
{ … }

static int ie6xx_wdt_stop(struct watchdog_device *wdd)
{ … }

static const struct watchdog_info ie6xx_wdt_info = …;

static const struct watchdog_ops ie6xx_wdt_ops = …;

static struct watchdog_device ie6xx_wdt_dev = …;

#ifdef CONFIG_DEBUG_FS

static int ie6xx_wdt_show(struct seq_file *s, void *unused)
{ … }

DEFINE_SHOW_ATTRIBUTE(…);

static void ie6xx_wdt_debugfs_init(void)
{ … }

static void ie6xx_wdt_debugfs_exit(void)
{ … }

#else
static void ie6xx_wdt_debugfs_init(void)
{
}

static void ie6xx_wdt_debugfs_exit(void)
{
}
#endif

static int ie6xx_wdt_probe(struct platform_device *pdev)
{ … }

static void ie6xx_wdt_remove(struct platform_device *pdev)
{ … }

static struct platform_driver ie6xx_wdt_driver = …;

static int __init ie6xx_wdt_init(void)
{ … }

static void __exit ie6xx_wdt_exit(void)
{ … }

late_initcall(ie6xx_wdt_init);
module_exit(ie6xx_wdt_exit);

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