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watchdog:use 'V' to stop watchdog

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Signed-off-by: anjiahao <anjiahao@xiaomi.com>
This commit is contained in:
anjiahao 2022-12-26 19:28:34 +08:00 committed by Xiang Xiao
parent 35c1e53b1a
commit 96ec6983db
2 changed files with 48 additions and 1 deletions
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6
drivers/timers/Kconfig
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@ -354,6 +354,12 @@ config WATCHDOG_DEVPATH
Please, check how your specific chip or board uses this symbol.
FYI: It's NOT used by the Auto-monitor feature.
config CONFIG_WATCHDOG_MAGIC_V
bool "Watchdog Device Magic num"
default Y
---help---
The watchdog can be stopped by writing 'V' to the watchdog's device node
menuconfig WATCHDOG_AUTOMONITOR
bool "Auto-monitor"
---help---

43
drivers/timers/watchdog.c
View File

@ -436,7 +436,48 @@ static ssize_t wdog_read(FAR struct file *filep, FAR char *buffer,
static ssize_t wdog_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
return 0;
#ifdef CONFIG_WATCHDOG_MAGIC_V
FAR struct inode *inode = filep->f_inode;
FAR struct watchdog_upperhalf_s *upper;
FAR struct watchdog_lowerhalf_s *lower;
int err = 0;
int i;
upper = inode->i_private;
DEBUGASSERT(upper != NULL);
lower = upper->lower;
DEBUGASSERT(lower != NULL);
nxmutex_lock(&upper->lock);
for (i = 0; i < buflen; i++)
{
if (buffer[i] == 'V')
{
#ifdef CONFIG_WATCHDOG_AUTOMONITOR
watchdog_automonitor_stop(upper);
#else
err = lower->ops->stop(lower);
#endif
break;
}
}
if (i == buflen)
{
err = lower->ops->keepalive(lower);
}
nxmutex_unlock(&upper->lock);
if (err < 0)
{
return err;
}
#endif
return buflen;
}
/****************************************************************************