static int omap_wdt_start(struct watchdog_device *wdog)
{
struct omap_wdt_dev *wdev = watchdog_get_drvdata(wdog);
void __iomem *base = wdev->base;
mutex_lock(&wdev->lock);
wdev->omap_wdt_users = true;
pm_runtime_get_sync(wdev->dev);
/* initialize prescaler */
while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x01)
cpu_relax();
__raw_writel((1 << 5) | (PTV << 2), base + OMAP_WATCHDOG_CNTRL);
while (__raw_readl(base + OMAP_WATCHDOG_WPS) & 0x01)
cpu_relax();
omap_wdt_set_timer(wdev, wdog->timeout);
omap_wdt_reload(wdev); /* trigger loading of new timeout value */
/* Enable delay interrupt */
if (kernelpet) {
__raw_writel(0x2, base + OMAP_WATCHDOG_WIRQENSET);
__raw_writel(0x2, base + OMAP_WATCHDOG_WIRQWAKEEN);
}
omap_wdt_enable(wdev);
mutex_unlock(&wdev->lock);
return 0;
}
static int omap_wdt_set_timeout(struct watchdog_device *wdog,
unsigned int timeout)
{
struct omap_wdt_dev *wdev = watchdog_get_drvdata(wdog);
mutex_lock(&wdev->lock);
omap_wdt_disable(wdev);
omap_wdt_set_timer(wdev, timeout);
omap_wdt_enable(wdev);
omap_wdt_reload(wdev);
wdog->timeout = timeout;
mutex_unlock(&wdev->lock);
return 0;
}