diff options
Diffstat (limited to 'drivers/watchdog/txx9wdt.c')
| -rw-r--r-- | drivers/watchdog/txx9wdt.c | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/drivers/watchdog/txx9wdt.c b/drivers/watchdog/txx9wdt.c index 57cefef27ce3..dbbc018a5f46 100644 --- a/drivers/watchdog/txx9wdt.c +++ b/drivers/watchdog/txx9wdt.c @@ -45,27 +45,34 @@ static unsigned long txx9wdt_alive; static int expect_close; static struct txx9_tmr_reg __iomem *txx9wdt_reg; static struct clk *txx9_imclk; +static DECLARE_LOCK(txx9_lock); static void txx9wdt_ping(void) { + spin_lock(&txx9_lock); __raw_writel(TXx9_TMWTMR_TWIE | TXx9_TMWTMR_TWC, &txx9wdt_reg->wtmr); + spin_unlock(&txx9_lock); } static void txx9wdt_start(void) { + spin_lock(&txx9_lock); __raw_writel(WD_TIMER_CLK * timeout, &txx9wdt_reg->cpra); __raw_writel(WD_TIMER_CCD, &txx9wdt_reg->ccdr); __raw_writel(0, &txx9wdt_reg->tisr); /* clear pending interrupt */ __raw_writel(TXx9_TMTCR_TCE | TXx9_TMTCR_CCDE | TXx9_TMTCR_TMODE_WDOG, &txx9wdt_reg->tcr); __raw_writel(TXx9_TMWTMR_TWIE | TXx9_TMWTMR_TWC, &txx9wdt_reg->wtmr); + spin_unlock(&txx9_lock); } static void txx9wdt_stop(void) { + spin_lock(&txx9_lock); __raw_writel(TXx9_TMWTMR_WDIS, &txx9wdt_reg->wtmr); __raw_writel(__raw_readl(&txx9wdt_reg->tcr) & ~TXx9_TMTCR_TCE, &txx9wdt_reg->tcr); + spin_unlock(&txx9_lock); } static int txx9wdt_open(struct inode *inode, struct file *file) @@ -120,13 +127,13 @@ static ssize_t txx9wdt_write(struct file *file, const char __user *data, return len; } -static int txx9wdt_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) +static long txx9wdt_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) { void __user *argp = (void __user *)arg; int __user *p = argp; int new_timeout; - static struct watchdog_info ident = { + static const struct watchdog_info ident = { .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, @@ -135,8 +142,6 @@ static int txx9wdt_ioctl(struct inode *inode, struct file *file, }; switch (cmd) { - default: - return -ENOTTY; case WDIOC_GETSUPPORT: return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; case WDIOC_GETSTATUS: @@ -156,6 +161,8 @@ static int txx9wdt_ioctl(struct inode *inode, struct file *file, /* Fall */ case WDIOC_GETTIMEOUT: return put_user(timeout, p); + default: + return -ENOTTY; } } @@ -168,22 +175,22 @@ static int txx9wdt_notify_sys(struct notifier_block *this, unsigned long code, } static const struct file_operations txx9wdt_fops = { - .owner = THIS_MODULE, - .llseek = no_llseek, - .write = txx9wdt_write, - .ioctl = txx9wdt_ioctl, - .open = txx9wdt_open, - .release = txx9wdt_release, + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = txx9wdt_write, + .unlocked_ioctl = txx9wdt_ioctl, + .open = txx9wdt_open, + .release = txx9wdt_release, }; static struct miscdevice txx9wdt_miscdev = { - .minor = WATCHDOG_MINOR, - .name = "watchdog", - .fops = &txx9wdt_fops, + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &txx9wdt_fops, }; static struct notifier_block txx9wdt_notifier = { - .notifier_call = txx9wdt_notify_sys + .notifier_call = txx9wdt_notify_sys, }; static int __init txx9wdt_probe(struct platform_device *dev) |