@@ -7,9 +7,13 @@ Required properties:
- reg: physical base address of the controller and length of memory mapped
region.
+Optional properties:
+- timeout-sec: contains the watchdog timeout in seconds.
+
Example:
watchdog@fffffd40 {
compatible = "atmel,at91sam9260-wdt";
reg = <0xfffffd40 0x10>;
+ timeout-sec = <10>;
};
@@ -114,6 +114,7 @@ config AT91RM9200_WATCHDOG
config AT91SAM9X_WATCHDOG
tristate "AT91SAM9X / AT91CAP9 watchdog"
depends on ARCH_AT91 && !ARCH_AT91RM9200
+ select WATCHDOG_CORE
help
Watchdog timer embedded into AT91SAM9X and AT91CAP9 chips. This will
reboot your system when the timeout is reached.
@@ -57,8 +57,10 @@
#define WDT_TIMEOUT (HZ/2)
/* User land timeout */
+#define MIN_HEARTBEAT 1
+#define MAX_HEARTBEAT 16
#define WDT_HEARTBEAT 15
-static int heartbeat = WDT_HEARTBEAT;
+static int heartbeat = 0;
module_param(heartbeat, int, 0);
MODULE_PARM_DESC(heartbeat, "Watchdog heartbeats in seconds. "
"(default = " __MODULE_STRING(WDT_HEARTBEAT) ")");
@@ -255,6 +257,12 @@ static struct miscdevice at91wdt_miscdev = {
.fops = &at91wdt_fops,
};
+static struct watchdog_device at91wdt_wdd __initdata = {
+ .timeout = WDT_HEARTBEAT,
+ .min_timeout = MIN_HEARTBEAT,
+ .max_timeout = MAX_HEARTBEAT,
+};
+
static int __init at91wdt_probe(struct platform_device *pdev)
{
struct resource *r;
@@ -273,6 +281,8 @@ static int __init at91wdt_probe(struct platform_device *pdev)
return -ENOMEM;
}
+ watchdog_init_timeout(&at91wdt_wdd, heartbeat, pdev->dev.of_node);
+
/* Set watchdog */
res = at91_wdt_settimeout(ms_to_ticks(WDT_HW_TIMEOUT * 1000));
if (res)
@@ -282,12 +292,12 @@ static int __init at91wdt_probe(struct platform_device *pdev)
if (res)
return res;
- at91wdt_private.next_heartbeat = jiffies + heartbeat * HZ;
+ at91wdt_private.next_heartbeat = jiffies + at91wdt_wdd.timeout * HZ;
setup_timer(&at91wdt_private.timer, at91_ping, 0);
mod_timer(&at91wdt_private.timer, jiffies + WDT_TIMEOUT);
pr_info("enabled (heartbeat=%d sec, nowayout=%d)\n",
- heartbeat, nowayout);
+ at91wdt_wdd.timeout, nowayout);
return 0;
}
Tested on at91sam9260 board (evk-pro3). Signed-off-by: Fabio Porcedda <fabio.porcedda@gmail.com> Cc: Andrew Victor <linux@maxim.org.za> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> --- Documentation/devicetree/bindings/watchdog/atmel-wdt.txt | 4 ++++ drivers/watchdog/Kconfig | 1 + drivers/watchdog/at91sam9_wdt.c | 16 +++++++++++++--- 3 files changed, 18 insertions(+), 3 deletions(-)