[PATCH 2/3] ARM: S5P: Add System define for arch_reset()

[Jassi Brar]

On Thu, Jun 24, 2010 at 10:11 PM, Kukjin Kim <kgene.kim at samsung.com> wrote:
> Kyungmin Park wrote:
>>
>> On Thu, Jun 24, 2010 at 7:31 AM, Kukjin Kim <kgene.kim at samsung.com> wrote:
>> > From: Jongpill Lee <boyko.lee at samsung.com>
>> >
>> > This patch adds system define for arch_reset() using Watchdog reset.
>> > And adds IO mapping for using WDT.
>>
>> Are there any reason to use the WDT to system reset?
>
> Yeah, I already commented about that.
> Now Samsung SoC hardware engineer recommends to use the reset of watchdog
> instead of software reset by restriction of hardware environment.
>
>> As original purpose of WDT. doesn't it better to use system reset?
>
> Original purpose? I think, WDT can be used as software reset.
I agree with Kyungmin Park.
Ideally WDT shud be used as a way to detect deadlock/starvation. When
the bootloader realizes the reset was due to WDT, different course of action
should be taken than that for reset due to, say, reboot command.