linux/drivers/watchdog/rzn1_wdt.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Renesas RZ/N1 Watchdog timer.
 * This is a 12-bit timer driver from a (62.5/16384) MHz clock. It can't even
 * cope with 2 seconds.
 *
 * Copyright 2018 Renesas Electronics Europe Ltd.
 *
 * Derived from Ralink RT288x watchdog timer.
 */

#include <linux/clk.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/watchdog.h>

#define DEFAULT_TIMEOUT …

#define RZN1_WDT_RETRIGGER …
#define RZN1_WDT_RETRIGGER_RELOAD_VAL …
#define RZN1_WDT_RETRIGGER_RELOAD_VAL_MASK …
#define RZN1_WDT_RETRIGGER_PRESCALE …
#define RZN1_WDT_RETRIGGER_ENABLE …
#define RZN1_WDT_RETRIGGER_WDSI …

#define RZN1_WDT_PRESCALER …
#define RZN1_WDT_MAX …

struct rzn1_watchdog { … };

static inline uint32_t max_heart_beat_ms(unsigned long clk_rate_khz)
{ … }

static inline uint32_t compute_reload_value(uint32_t tick_ms,
					    unsigned long clk_rate_khz)
{ … }

static int rzn1_wdt_ping(struct watchdog_device *w)
{ … }

static int rzn1_wdt_start(struct watchdog_device *w)
{ … }

static irqreturn_t rzn1_wdt_irq(int irq, void *_wdt)
{ … }

static struct watchdog_info rzn1_wdt_info = …;

static const struct watchdog_ops rzn1_wdt_ops = …;

static int rzn1_wdt_probe(struct platform_device *pdev)
{ … }


static const struct of_device_id rzn1_wdt_match[] = …;
MODULE_DEVICE_TABLE(of, rzn1_wdt_match);

static struct platform_driver rzn1_wdt_driver = …;

module_platform_driver(…) …;

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