You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
78 lines
1.9 KiB
Diff
78 lines
1.9 KiB
Diff
--- a/drivers/watchdog/Kconfig
|
|
+++ b/drivers/watchdog/Kconfig
|
|
@@ -188,7 +188,7 @@ config SA1100_WATCHDOG
|
|
|
|
config MPCORE_WATCHDOG
|
|
tristate "MPcore watchdog"
|
|
- depends on HAVE_ARM_TWD
|
|
+ depends on ARCH_CNS3XXX
|
|
help
|
|
Watchdog timer embedded into the MPcore system.
|
|
|
|
--- a/drivers/watchdog/mpcore_wdt.c
|
|
+++ b/drivers/watchdog/mpcore_wdt.c
|
|
@@ -32,11 +32,14 @@
|
|
#include <linux/uaccess.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
+#include <linux/jiffies.h>
|
|
+#include <linux/delay.h>
|
|
|
|
#include <asm/smp_twd.h>
|
|
|
|
struct mpcore_wdt {
|
|
unsigned long timer_alive;
|
|
+ unsigned long timer_rate;
|
|
struct device *dev;
|
|
void __iomem *base;
|
|
int irq;
|
|
@@ -98,14 +101,12 @@ static void mpcore_wdt_keepalive(struct
|
|
unsigned long count;
|
|
|
|
spin_lock(&wdt_lock);
|
|
- /* Assume prescale is set to 256 */
|
|
- count = __raw_readl(wdt->base + TWD_WDOG_COUNTER);
|
|
- count = (0xFFFFFFFFU - count) * (HZ / 5);
|
|
- count = (count / 256) * mpcore_margin;
|
|
+ count = (wdt->timer_rate / 256) * mpcore_margin;
|
|
|
|
/* Reload the counter */
|
|
writel(count + wdt->perturb, wdt->base + TWD_WDOG_LOAD);
|
|
wdt->perturb = wdt->perturb ? 0 : 1;
|
|
+
|
|
spin_unlock(&wdt_lock);
|
|
}
|
|
|
|
@@ -329,6 +330,8 @@ static int __devinit mpcore_wdt_probe(st
|
|
struct mpcore_wdt *wdt;
|
|
struct resource *res;
|
|
int ret;
|
|
+ unsigned long count;
|
|
+ u64 waitjiffies;
|
|
|
|
/* We only accept one device, and it must have an id of -1 */
|
|
if (dev->id != -1)
|
|
@@ -375,6 +378,22 @@ static int __devinit mpcore_wdt_probe(st
|
|
goto err_irq;
|
|
}
|
|
|
|
+ waitjiffies = get_jiffies_64() + 1;
|
|
+ while (get_jiffies_64() < waitjiffies)
|
|
+ udelay(10);
|
|
+
|
|
+ waitjiffies += 5;
|
|
+
|
|
+ __raw_writel(0x00000001, wdt->base + TWD_WDOG_CONTROL);
|
|
+ __raw_writel(0xFFFFFFFFU, wdt->base + TWD_WDOG_LOAD);
|
|
+
|
|
+ while (get_jiffies_64() < waitjiffies)
|
|
+ udelay(10);
|
|
+
|
|
+ count = __raw_readl(wdt->base + TWD_WDOG_COUNTER);
|
|
+
|
|
+ wdt->timer_rate = (0xFFFFFFFFU - count) * (HZ / 5);
|
|
+
|
|
mpcore_wdt_stop(wdt);
|
|
platform_set_drvdata(dev, wdt);
|
|
mpcore_wdt_dev = dev;
|