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davinci: Fix watchdog reset code 

The davinci reset routine, davinci_watchdog_reset(), sets the
TCR register instead of the TGCR register as it should to put
the WDT into its "Initial State".

It also writes the WDTCR register without the proper WDKEY
which is pointless since the register will be write-protected.

Signed-off-by: David Griego <dgriego@mvista.com>
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
David Griego 2009-06-01 11:41:54 -07:00 committed by Kevin Hilman
parent 75d0fa70e7
commit a23f7dc82d
1 changed files with 3 additions and 7 deletions
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10
arch/arm/mach-davinci/time.c
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@ -420,11 +420,11 @@ void davinci_watchdog_reset(void)
/* reset timer, set mode to 64-bit watchdog, and unreset */
tgcr = 0;
__raw_writel(tgcr, base + TCR);
__raw_writel(tgcr, base + TGCR);
tgcr = TGCR_TIMMODE_64BIT_WDOG << TGCR_TIMMODE_SHIFT;
tgcr |= (TGCR_UNRESET << TGCR_TIM12RS_SHIFT) |
(TGCR_UNRESET << TGCR_TIM34RS_SHIFT);
__raw_writel(tgcr, base + TCR);
__raw_writel(tgcr, base + TGCR);
/* clear counter and period regs */
__raw_writel(0, base + TIM12);
@ -432,12 +432,8 @@ void davinci_watchdog_reset(void)
__raw_writel(0, base + PRD12);
__raw_writel(0, base + PRD34);
/* enable */
wdtcr = __raw_readl(base + WDTCR);
wdtcr |= WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT;
__raw_writel(wdtcr, base + WDTCR);
/* put watchdog in pre-active state */
wdtcr = __raw_readl(base + WDTCR);
wdtcr = (WDTCR_WDKEY_SEQ0 << WDTCR_WDKEY_SHIFT) |
(WDTCR_WDEN_ENABLE << WDTCR_WDEN_SHIFT);
__raw_writel(wdtcr, base + WDTCR);