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watchdog: sama5d4: fix WDD value to be always set to max 

WDD value must be always set to max (0xFFF) otherwise the hardware
block will reset the board on the first ping of the watchdog.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Eugen Hristev 2019-05-08 14:15:03 +00:00 committed by Wim Van Sebroeck
parent e14651352a
commit 8632944841
1 changed files with 1 additions and 3 deletions
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4
drivers/watchdog/sama5d4_wdt.c
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@ -110,9 +110,7 @@ static int sama5d4_wdt_set_timeout(struct watchdog_device *wdd,
u32 value = WDT_SEC2TICKS(timeout);
wdt->mr &= ~AT91_WDT_WDV;
wdt->mr &= ~AT91_WDT_WDD;
wdt->mr |= AT91_WDT_SET_WDV(value);
wdt->mr |= AT91_WDT_SET_WDD(value);
/*
* WDDIS has to be 0 when updating WDD/WDV. The datasheet states: When
@ -248,7 +246,7 @@ static int sama5d4_wdt_probe(struct platform_device *pdev)
timeout = WDT_SEC2TICKS(wdd->timeout);
wdt->mr |= AT91_WDT_SET_WDD(timeout);
wdt->mr |= AT91_WDT_SET_WDD(WDT_SEC2TICKS(MAX_WDT_TIMEOUT));
wdt->mr |= AT91_WDT_SET_WDV(timeout);
ret = sama5d4_wdt_init(wdt);