make the HW WDT timeout configurable through the define
CONFIG_AT91_HW_WDT_TIMEOUT.

Signed-off-by: Heiko Schocher <h...@denx.de>
---

 README                          | 3 +++
 drivers/watchdog/at91sam9_wdt.c | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/README b/README
index fefa71c..5cce4c2 100644
--- a/README
+++ b/README
@@ -1257,6 +1257,9 @@ The following options need to be configured:
                SoC, then define this variable and provide board
                specific code for the "hw_watchdog_reset" function.
 
+               CONFIG_AT91_HW_WDT_TIMEOUT
+               specify the timeout in seconds. default 2 seconds.
+
 - U-Boot Version:
                CONFIG_VERSION_VARIABLE
                If this variable is defined, an environment variable
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index ffd49a2..03c786c 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -30,7 +30,11 @@
 #define ticks_to_ms(t) (((t + 1) * 1000) >> 8)
 
 /* Hardware timeout in seconds */
+#if !defined(CONFIG_AT91_HW_WDT_TIMEOUT)
 #define WDT_HW_TIMEOUT 2
+#else
+#define WDT_HW_TIMEOUT CONFIG_AT91_HW_WDT_TIMEOUT
+#endif
 
 /*
  * Set the watchdog time interval in 1/256Hz (write-once)
-- 
2.1.0

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