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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