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

commit a9e0436b303e94ba57d3bd4b1fcbeaa744b7ebeb upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/watchdog/kempld_wdt.c b/drivers/watchdog/kempld_wdt.c
index 20dc73844737a99cf30aa6852f6bfceb06d04984..d9c1a1601926e277c628905a2d54b582ec128eab 100644 (file)
--- 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);