259 lines
6.1 KiB
Diff
259 lines
6.1 KiB
Diff
--- a/drivers/watchdog/Kconfig
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+++ b/drivers/watchdog/Kconfig
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@@ -959,6 +959,7 @@ config ATH79_WDT
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config BCM47XX_WDT
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tristate "Broadcom BCM47xx Watchdog Timer"
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depends on BCM47XX
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+ select WATCHDOG_CORE
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help
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Hardware driver for the Broadcom BCM47xx Watchdog Timer.
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--- a/drivers/watchdog/bcm47xx_wdt.c
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+++ b/drivers/watchdog/bcm47xx_wdt.c
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@@ -14,15 +14,12 @@
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#include <linux/bitops.h>
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#include <linux/errno.h>
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-#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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-#include <linux/miscdevice.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/reboot.h>
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#include <linux/types.h>
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-#include <linux/uaccess.h>
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#include <linux/watchdog.h>
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#include <linux/timer.h>
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#include <linux/jiffies.h>
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@@ -41,15 +38,11 @@ module_param(wdt_time, int, 0);
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MODULE_PARM_DESC(wdt_time, "Watchdog time in seconds. (default="
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__MODULE_STRING(WDT_DEFAULT_TIME) ")");
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-#ifdef CONFIG_WATCHDOG_NOWAYOUT
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module_param(nowayout, bool, 0);
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MODULE_PARM_DESC(nowayout,
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"Watchdog cannot be stopped once started (default="
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__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
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-#endif
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-static unsigned long bcm47xx_wdt_busy;
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-static char expect_release;
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static struct timer_list wdt_timer;
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static atomic_t ticks;
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@@ -97,29 +90,31 @@ static void bcm47xx_timer_tick(unsigned
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}
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}
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-static inline void bcm47xx_wdt_pet(void)
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+static int bcm47xx_wdt_keepalive(struct watchdog_device *wdd)
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{
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atomic_set(&ticks, wdt_time);
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+
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+ return 0;
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}
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-static void bcm47xx_wdt_start(void)
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+static int bcm47xx_wdt_start(struct watchdog_device *wdd)
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{
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bcm47xx_wdt_pet();
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bcm47xx_timer_tick(0);
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+
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+ return 0;
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}
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-static void bcm47xx_wdt_pause(void)
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+static int bcm47xx_wdt_stop(struct watchdog_device *wdd)
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{
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del_timer_sync(&wdt_timer);
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bcm47xx_wdt_hw_stop();
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-}
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-static void bcm47xx_wdt_stop(void)
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-{
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- bcm47xx_wdt_pause();
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+ return 0;
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}
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-static int bcm47xx_wdt_settimeout(int new_time)
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+static int bcm47xx_wdt_set_timeout(struct watchdog_device *wdd,
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+ unsigned int new_time)
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{
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if ((new_time <= 0) || (new_time > WDT_MAX_TIME))
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return -EINVAL;
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@@ -128,51 +123,6 @@ static int bcm47xx_wdt_settimeout(int ne
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return 0;
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}
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-static int bcm47xx_wdt_open(struct inode *inode, struct file *file)
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-{
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- if (test_and_set_bit(0, &bcm47xx_wdt_busy))
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- return -EBUSY;
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-
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- bcm47xx_wdt_start();
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- return nonseekable_open(inode, file);
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-}
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-
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-static int bcm47xx_wdt_release(struct inode *inode, struct file *file)
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-{
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- if (expect_release == 42) {
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- bcm47xx_wdt_stop();
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- } else {
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- pr_crit("Unexpected close, not stopping watchdog!\n");
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- bcm47xx_wdt_start();
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- }
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-
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- clear_bit(0, &bcm47xx_wdt_busy);
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- expect_release = 0;
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- return 0;
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-}
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-
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-static ssize_t bcm47xx_wdt_write(struct file *file, const char __user *data,
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- size_t len, loff_t *ppos)
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-{
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- if (len) {
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- if (!nowayout) {
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- size_t i;
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-
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- expect_release = 0;
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-
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- for (i = 0; i != len; i++) {
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- char c;
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- if (get_user(c, data + i))
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- return -EFAULT;
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- if (c == 'V')
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- expect_release = 42;
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- }
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- }
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- bcm47xx_wdt_pet();
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- }
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- return len;
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-}
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-
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static const struct watchdog_info bcm47xx_wdt_info = {
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.identity = DRV_NAME,
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.options = WDIOF_SETTIMEOUT |
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@@ -180,80 +130,25 @@ static const struct watchdog_info bcm47x
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WDIOF_MAGICCLOSE,
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};
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-static long bcm47xx_wdt_ioctl(struct file *file,
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- unsigned int cmd, unsigned long arg)
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-{
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- void __user *argp = (void __user *)arg;
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- int __user *p = argp;
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- int new_value, retval = -EINVAL;
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-
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- switch (cmd) {
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- case WDIOC_GETSUPPORT:
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- return copy_to_user(argp, &bcm47xx_wdt_info,
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- sizeof(bcm47xx_wdt_info)) ? -EFAULT : 0;
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-
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- case WDIOC_GETSTATUS:
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- case WDIOC_GETBOOTSTATUS:
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- return put_user(0, p);
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-
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- case WDIOC_SETOPTIONS:
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- if (get_user(new_value, p))
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- return -EFAULT;
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-
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- if (new_value & WDIOS_DISABLECARD) {
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- bcm47xx_wdt_stop();
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- retval = 0;
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- }
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-
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- if (new_value & WDIOS_ENABLECARD) {
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- bcm47xx_wdt_start();
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- retval = 0;
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- }
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-
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- return retval;
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-
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- case WDIOC_KEEPALIVE:
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- bcm47xx_wdt_pet();
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- return 0;
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-
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- case WDIOC_SETTIMEOUT:
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- if (get_user(new_value, p))
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- return -EFAULT;
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-
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- if (bcm47xx_wdt_settimeout(new_value))
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- return -EINVAL;
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-
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- bcm47xx_wdt_pet();
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-
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- case WDIOC_GETTIMEOUT:
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- return put_user(wdt_time, p);
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-
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- default:
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- return -ENOTTY;
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- }
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-}
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-
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static int bcm47xx_wdt_notify_sys(struct notifier_block *this,
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- unsigned long code, void *unused)
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+ unsigned long code, void *unused)
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{
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if (code == SYS_DOWN || code == SYS_HALT)
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bcm47xx_wdt_stop();
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return NOTIFY_DONE;
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}
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-static const struct file_operations bcm47xx_wdt_fops = {
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+static struct watchdog_ops bcm47xx_wdt_ops = {
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.owner = THIS_MODULE,
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- .llseek = no_llseek,
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- .unlocked_ioctl = bcm47xx_wdt_ioctl,
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- .open = bcm47xx_wdt_open,
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- .release = bcm47xx_wdt_release,
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- .write = bcm47xx_wdt_write,
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+ .start = bcm47xx_wdt_start,
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+ .stop = bcm47xx_wdt_stop,
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+ .ping = bcm47xx_wdt_keepalive,
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+ .set_timeout = bcm47xx_wdt_set_timeout,
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};
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-static struct miscdevice bcm47xx_wdt_miscdev = {
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- .minor = WATCHDOG_MINOR,
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- .name = "watchdog",
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- .fops = &bcm47xx_wdt_fops,
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+static struct watchdog_device bcm47xx_wdt_wdd = {
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+ .info = &bcm47xx_wdt_info,
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+ .ops = &bcm47xx_wdt_ops,
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};
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static struct notifier_block bcm47xx_wdt_notifier = {
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@@ -274,12 +169,13 @@ static int __init bcm47xx_wdt_init(void)
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pr_info("wdt_time value must be 0 < wdt_time < %d, using %d\n",
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(WDT_MAX_TIME + 1), wdt_time);
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}
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+ watchdog_set_nowayout(&bcm47xx_wdt_wdd, nowayout);
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ret = register_reboot_notifier(&bcm47xx_wdt_notifier);
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if (ret)
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return ret;
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- ret = misc_register(&bcm47xx_wdt_miscdev);
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+ ret = watchdog_register_device(&bcm47xx_wdt_wdd);
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if (ret) {
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unregister_reboot_notifier(&bcm47xx_wdt_notifier);
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return ret;
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@@ -292,10 +188,7 @@ static int __init bcm47xx_wdt_init(void)
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static void __exit bcm47xx_wdt_exit(void)
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{
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- if (!nowayout)
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- bcm47xx_wdt_stop();
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-
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- misc_deregister(&bcm47xx_wdt_miscdev);
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+ watchdog_unregister_device(&bcm47xx_wdt_wdd);
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unregister_reboot_notifier(&bcm47xx_wdt_notifier);
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}
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@@ -306,4 +199,3 @@ module_exit(bcm47xx_wdt_exit);
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MODULE_AUTHOR("Aleksandar Radovanovic");
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MODULE_DESCRIPTION("Watchdog driver for Broadcom BCM47xx");
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MODULE_LICENSE("GPL");
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-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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