[U-Boot] [PATCH AT91] Add watchdog reset to the at91samx SOC family

[Michael Trimarchi]

Hi

On 03/15/2011 01:01 PM, Reinhard Meyer wrote:
> Dear Michael Trimarchi,
>> This patch add the watchdog reset function to the atmel atsam9x architectures.
> 
> NAK.
> 
> Watchdog already exists at drivers/watchdog/at91sam9_wdt.c :)
> 

I'm getting confused because I have seen other implementation of the watchdog reset function and I was thinking
that was the correct location of the function. Some board initialize it in the sturtup.

> Maybe its a bit of an obscure location... But it is already invented ;)
> 
>> +	int re_enable = disable_interrupts();
>> +
>> +	writel(AT91_WDT_CR_WDRSTT | AT91_WDT_CR_KEY, &wdt->cr);
>> +
>> +	if (re_enable)
>> +		enable_interrupts();
> 
> Besides... why would we need to disable IRQs here, writel() is using one instruction
> to write to the address?
> 

:(, Ok, I'm porting a new board and I have done it too fase without checking to much the code
but the final result. Anyway I have seen the driver but I don't understand how the HW_WATCHDOG interface match the hw_watchdog_init.


Michael Trimarchi


> Best Regards,
> 
> Reinhard
>