watchdog: imgpdc: Fix max timeout

Maximum timeout is currently set in clock cycles, but the watchdog
core expects it to be in seconds. Fix it.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/watchdog/imgpdc_wdt.c b/drivers/watchdog/imgpdc_wdt.c
index 28c10e292aa3..56b8ebcc3775 100644
--- a/drivers/watchdog/imgpdc_wdt.c
+++ b/drivers/watchdog/imgpdc_wdt.c
@@ -152,6 +152,7 @@ static int pdc_wdt_restart(struct notifier_block *this, unsigned long mode,
 
 static int pdc_wdt_probe(struct platform_device *pdev)
 {
+        u64 div;
         int ret, val;
         unsigned long clk_rate;
         struct resource *res;
@@ -211,7 +212,10 @@ static int pdc_wdt_probe(struct platform_device *pdev)
 
         pdc_wdt->wdt_dev.info = &pdc_wdt_info;
         pdc_wdt->wdt_dev.ops = &pdc_wdt_ops;
-        pdc_wdt->wdt_dev.max_timeout = 1 << PDC_WDT_CONFIG_DELAY_MASK;
+
+        div = 1ULL << (PDC_WDT_CONFIG_DELAY_MASK + 1);
+        do_div(div, clk_rate);
+        pdc_wdt->wdt_dev.max_timeout = div;
         pdc_wdt->wdt_dev.timeout = PDC_WDT_DEF_TIMEOUT;
         pdc_wdt->wdt_dev.parent = &pdev->dev;
         watchdog_set_drvdata(&pdc_wdt->wdt_dev, pdc_wdt);