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[POWERPC] ppc: Fix booke watchdog initialization

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Fix two problems in the book-e watchdog driver.

a) The 4xx default period was defined wrong
b) Clear status before enabling the watchdog exception

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Stefan Roese 2007-02-07 09:45:55 +01:00 committed by Paul Mackerras
parent 2366fb16ab
commit f31909c003
1 changed files with 11 additions and 9 deletions
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20
drivers/char/watchdog/booke_wdt.c
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@ -35,7 +35,7 @@
#ifdef CONFIG_FSL_BOOKE
#define WDT_PERIOD_DEFAULT 63 /* Ex. wdt_period=28 bus=333Mhz , reset=~40sec */
#else
#define WDT_PERIOD_DEFAULT 4 /* Refer to the PPC40x and PPC4xx manuals */
#define WDT_PERIOD_DEFAULT 3 /* Refer to the PPC40x and PPC4xx manuals */
#endif /* for timing information */
u32 booke_wdt_enabled = 0;
@ -47,6 +47,14 @@ u32 booke_wdt_period = WDT_PERIOD_DEFAULT;
#define WDTP(x) (TCR_WP(x))
#endif
/*
* booke_wdt_ping:
*/
static __inline__ void booke_wdt_ping(void)
{
mtspr(SPRN_TSR, TSR_ENW|TSR_WIS);
}
/*
* booke_wdt_enable:
*/
@ -54,20 +62,14 @@ static __inline__ void booke_wdt_enable(void)
{
u32 val;
/* clear status before enabling watchdog */
booke_wdt_ping();
val = mfspr(SPRN_TCR);
val |= (TCR_WIE|TCR_WRC(WRC_CHIP)|WDTP(booke_wdt_period));
mtspr(SPRN_TCR, val);
}
/*
* booke_wdt_ping:
*/
static __inline__ void booke_wdt_ping(void)
{
mtspr(SPRN_TSR, TSR_ENW|TSR_WIS);
}
/*
* booke_wdt_write:
*/