watchdog: kempld-wdt: Use the correct value when configuring the prescaler with the watchdog

Use the prescaler index, rather than its value, to configure the watchdog.
This will prevent a mismatch with the prescaler used to calculate the cycles.

Signed-off-by: Per Gundberg <per.gundberg@icomera.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Michael Brunner <michael.brunner@kontron.com>
Tested-by: Michael Brunner <michael.brunner@kontron.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Cc: stable <stable@vger.kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/watchdog/kempld_wdt.c b/drivers/watchdog/kempld_wdt.c
index 20dc73844737..d9c1a1601926 100644
--- a/drivers/watchdog/kempld_wdt.c
+++ b/drivers/watchdog/kempld_wdt.c
@@ -162,7 +162,7 @@ static int kempld_wdt_set_stage_timeout(struct kempld_wdt_data *wdt_data,
         kempld_get_mutex(pld);
         stage_cfg = kempld_read8(pld, KEMPLD_WDT_STAGE_CFG(stage->id));
         stage_cfg &= ~STAGE_CFG_PRESCALER_MASK;
-        stage_cfg |= STAGE_CFG_SET_PRESCALER(prescaler);
+        stage_cfg |= STAGE_CFG_SET_PRESCALER(PRESCALER_21);
         kempld_write8(pld, KEMPLD_WDT_STAGE_CFG(stage->id), stage_cfg);
         kempld_write32(pld, KEMPLD_WDT_STAGE_TIMEOUT(stage->id),
                         stage_timeout);