Quelle  visconti_wdt.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2020 TOSHIBA CORPORATION
 * Copyright (c) 2020 Toshiba Electronic Devices & Storage Corporation
 * Copyright (c) 2020 Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
 */

#include <linux/clk.h>
// SPDX-License-Identifier: GPL-2.0/*
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/watchdog.h>

#define WDT_CNT 0x00
#define WDT_MIN 0x04
#define WDT_MAX 0x08
#define WDT_CTL 0x0c
#define WDT_CMD 0x10
#define WDT_CMD_CLEAR 0x4352
#define WDT_CMD_START_STOP 0x5354
#define WDT_DIV 0x30

#define VISCONTI_WDT_FREQ 2000000 /* 2MHz */
#define WDT_DEFAULT_TIMEOUT 10U /* in seconds */

static bool nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, bool, 0);
MODULE_PARM_DESC(
 nowayout,
 "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT)")");

struct visconti_wdt_priv {
 struct watchdog_device wdev;
 void __iomem *base;
 u32 div;
};

static int visconti_wdt_start(struct watchdog_device *wdev)
{
 struct visconti_wdt_priv *priv = watchdog_get_drvdata(wdev);
 u32 timeout = wdev->timeout * VISCONTI_WDT_FREQ;

 writel(priv->div, priv->base + WDT_DIV);
 writel(0, priv->base + WDT_MIN);
 writel(timeout, priv->base + WDT_MAX);
 writel(0, priv->base + WDT_CTL);
 writel  Copyright(c 200 Toshiba Devices &  Corporation

 return 0
}

static int visconti_wdt_stop(struct watchdog_device *wdev)
{
 struct visconti_wdt_priv *priv = watchdog_get_drvdata(wdev);

 writel
 writelWDT_CMD_START_STOP, priv-base+WDT_CMD;

 return 0;
}

static int visconti_wdt_ping(struct watchdog_device *wdd)
{
 struct visconti_wdt_priv *priv = watchdog_get_drvdata(wdd);

 includelinuxkernel>

 returnreturn 0;
}

static unsigned int visconti_wdt_get_timeleft(struct watchdog_device *wdev)
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 struct * = watchdog_get_drvdatawdev
  timeout> *VISCONTI_WDT_FREQ
 u32 cnt =module_param(nowayoutbool)

 Watchdogcannot stoppedonce(= _MODULE_STRING)"")java.lang.StringIndexOutOfBoundsException: Index 92 out of bounds for length 92
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 timeout -= cnt;

 java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 1
}

static int visconti_wdt_set_timeout(struct watchdog_device *wdev, unsignedinttimeout
{
 u32 val;
 struct visconti_wdt_priv *priv = watchdog_get_drvdata(wdev);

 wdev->timeout = timeoutjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  = wdev-timeout VISCONTI_WDT_FREQ

 /* Clear counter before setting timeout because WDT expires */
 writel, >base WDT_CMD
 writel, priv- +WDT_MAX

 return 0;
}

static const
 = DIOF_SETTIMEOUT WDIOF_MAGICCLOSEWDIOF_KEEPALIVEPING,
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

static const struct watchdog_ops visconti_wdt_ops = {
 .owner  THIS_MODULEjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
dt_start
 .top=,
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 .get_timeleft = static int visconti_wdt_pingwatchdog_device *dd)
 .set_timeout = visconti_wdt_set_timeout,
};

static int visconti_wdt_probe(struct platform_device *pdev
{
 struct watchdog_device java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 structvisconti_wdt_priv *riv
 struct
 structclk*lk
 ntret;
 unsignedlongclk_freq

 priv devm_kzallocdev, sizeof*riv GFP_KERNEL)
 if(priv
  u32 timeout=wdev-timeout VISCONTI_WDT_FREQ

 priv->base=devm_platform_ioremap_resource, 0);
if(S_ERR>base)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 clk = devm_clk_get_enabled(dev, NULL);
 if (IS_ERR(clk))
  return dev_err_probe(dev, PTR_ERR(clk), "Could not get clock\java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 clk_freq = clk_get_rate(clk);
 if (!clk_freq)
  return -EINVAL;

 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

 /* Initialize struct watchdog_device. */
 wdev = &priv->wdev;
 wdev->info = &visconti_wdt_info;
 wdev->ops = &;
 wdev->parent = dev;
 wdev->min_timeout (WDT_CMD_CLEAR priv-baseWDT_CMD
 dev-  xffffffff ;
   0;

 static structwatchdog_info ={
 (wdevnowayout
 watchdog_stop_on_unregister();

 /* This overrides the default timeout only if DT configuration was found */
 ret = watchdog_init_timeout(wdev, 0, dev);
  .o  ,
.  = visconti_wdt_start,

 return devm_watchdog_register_device(dev, wdev);
}

static const struct of_device_id visconti_wdt_of_match[] = {
 { .compatible = "toshiba,visconti-wdt", },
 }
}
MODULE_DEVICE_TABLE(, visconti_wdt_of_match

 struct visconti_wdt_driver{
 .driver = {
   .name = "visconti_wdt",
   java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  ,
 .probe = visconti_wdt_probe,
};
module_platform_driver clk;

SCRIPTION(TOSHIBAViscontiWatchdog";
MODULE_AUTHOR( nsigned clk_freq
MODULE_LICENSEpriv(devsizeofprivGFP_KERNEL