watchdog: kempld-wdt: Use the correct value when configuring the prescaler with the watchdog
commit a9e0436b30
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>
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@ -162,7 +162,7 @@ static int kempld_wdt_set_stage_timeout(struct kempld_wdt_data *wdt_data,
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kempld_get_mutex(pld);
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stage_cfg = kempld_read8(pld, KEMPLD_WDT_STAGE_CFG(stage->id));
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stage_cfg &= ~STAGE_CFG_PRESCALER_MASK;
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stage_cfg |= STAGE_CFG_SET_PRESCALER(prescaler);
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stage_cfg |= STAGE_CFG_SET_PRESCALER(PRESCALER_21);
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kempld_write8(pld, KEMPLD_WDT_STAGE_CFG(stage->id), stage_cfg);
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kempld_write32(pld, KEMPLD_WDT_STAGE_TIMEOUT(stage->id),
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stage_timeout);
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