linux/drivers/watchdog/rti_wdt.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Watchdog driver for the K3 RTI module
 *
 * (c) Copyright 2019-2020 Texas Instruments Inc.
 * All rights reserved.
 */

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/types.h>
#include <linux/watchdog.h>

#define DEFAULT_HEARTBEAT …

/* Max heartbeat is calculated at 32kHz source clock */
#define MAX_HEARTBEAT …

/* Timer register set definition */
#define RTIDWDCTRL …
#define RTIDWDPRLD …
#define RTIWDSTATUS …
#define RTIWDKEY …
#define RTIDWDCNTR …
#define RTIWWDRXCTRL …
#define RTIWWDSIZECTRL …

#define RTIWWDRX_NMI …

#define RTIWWDSIZE_50P …
#define RTIWWDSIZE_25P …
#define RTIWWDSIZE_12P5 …
#define RTIWWDSIZE_6P25 …
#define RTIWWDSIZE_3P125 …

#define WDENABLE_KEY …

#define WDKEY_SEQ0 …
#define WDKEY_SEQ1 …

#define WDT_PRELOAD_SHIFT …

#define WDT_PRELOAD_MAX …

#define DWDST …

#define PON_REASON_SOF_NUM …
#define PON_REASON_MAGIC_NUM …
#define PON_REASON_EOF_NUM …
#define RESERVED_MEM_MIN_SIZE …

#define MAX_HW_ERROR …

static int heartbeat = …;

/*
 * struct to hold data for each WDT device
 * @base - base io address of WD device
 * @freq - source clock frequency of WDT
 * @wdd  - hold watchdog device as is in WDT core
 */
struct rti_wdt_device { … };

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

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

static int rti_wdt_setup_hw_hb(struct watchdog_device *wdd, u32 wsize)
{ … }

static unsigned int rti_wdt_get_timeleft_ms(struct watchdog_device *wdd)
{ … }

static unsigned int rti_wdt_get_timeleft(struct watchdog_device *wdd)
{ … }

static const struct watchdog_info rti_wdt_info = …;

static const struct watchdog_ops rti_wdt_ops = …;

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

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

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

static struct platform_driver rti_wdt_driver = …;

module_platform_driver(…) …;

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

module_param(heartbeat, int, 0);
MODULE_PARM_DESC(…) …;

MODULE_LICENSE(…) …;
MODULE_ALIAS(…) …;