Hi Sweta,
which kernel are you using ?? It works with the 2.6.19 Kernel from GIT
tree.
Ciao,
Peter
On Thu, 28 Dec 2006, [EMAIL PROTECTED] wrote:
> Hi All,
> I want to reset the Davinci pocessor using watchdog timer.
> So when I give reboot command from kernel, it hangs & doesn't actually
> reset the processor.
> code for watchdog rest in kernel is as follows :
> void davinci_watchdog_reset(void) {
> volatile davinci_timer_regs_t *davinci_wdt = (volatile
> davinci_timer_regs_t *)IO_ADDRESS(DAVINCI_WDOG_BASE);
> davinci_wdt->tcr = 0x0; /* disable timer */
> davinci_wdt->tgcr = 0x0; /* reset timer */
> davinci_wdt->tgcr = 0x8; /* configure timer2 as 64-bit */
> davinci_wdt->tgcr |= 0x3; /* release timer from reset */
> davinci_wdt->tim12 = 0; /* clear counter and period regs */
> davinci_wdt->tim34 = 0;
> davinci_wdt->prd12 = 0;
> davinci_wdt->prd34 = 0;
> davinci_wdt->tcr |= 0x00000040;
> davinci_wdt->wdtcr |= 0x4000; /* enable watchdog timer */
>
> *(volatile unsigned int *)(0x01c41a20) = 0x00000000;
>
> /* put watchdog in pre-active state */
> davinci_wdt->wdtcr = 0xA5C64000;
>
> /* put watchdog in active state */
> davinci_wdt->wdtcr = 0xDA7E4000;
>
> /* write an invalid value to the WDKEY field to trigger* a watchdog
> reset */
> davinci_wdt->wdtcr = 0x00004000;
>
> }
>
> But it hangs & doesn't actually reset the processor.
> I tried with reset commnad from u-boot loader also. It also gives me the
> same result.
> Can anyone Help me out to debug what is wrong ?
>
> Thanks in advance,
> -Sweta
>
>
>
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