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powerpc/watchdog: Don't enable interrupt on PPC64 BookE 

Critical interrupts are not handled on PPC64 BookE machines,
so when the first watchdog interrupt fires the machine will
freeze without a warning until it's rebooted by the second
watchdog trigger.
Plus, the interrupt isn't used anyway since the driver
expects a usermode app to ping the watchdog periodically.

Signed-off-by: Laurentiu Tudor <Laurentiu.Tudor@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Tudor Laurentiu 2013-03-05 17:52:49 +02:00 committed by Scott Wood
parent a16d8aa472
commit 3978bdb4ed
1 changed files with 8 additions and 0 deletions
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8
drivers/watchdog/booke_wdt.c
View File

@ -138,6 +138,14 @@ static void __booke_wdt_enable(void *data)
val &= ~WDTP_MASK; val &= ~WDTP_MASK;
val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period)); val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
#ifdef CONFIG_PPC_BOOK3E_64
/*
* Crit ints are currently broken on PPC64 Book-E, so
* just disable them for now.
*/
val &= ~TCR_WIE;
#endif
mtspr(SPRN_TCR, val); mtspr(SPRN_TCR, val);
} }