[PATCH] Watchdog: Adding support for Watchdog found with ARM CortexA9

[Viresh KUMAR]

On 5/19/2010 11:02 AM, Shilimkar, Santosh wrote:
>> -----Original Message-----
>> From: linux-arm-kernel-bounces at lists.infradead.org [mailto:linux-arm-kernel-
>> bounces at lists.infradead.org] On Behalf Of Viresh KUMAR
>> Sent: Wednesday, May 19, 2010 9:33 AM
>> To: George G. Davis; srinidhi kasagar; alan at lxorguk.ukuu.org.uk
>> Cc: armando.visconti at st.com; shiraz.hashim at st.com; Jassi Brar; linus.walleij at stericsson.com; linux-
>> arm-kernel at lists.infradead.org
>> Subject: Re: [PATCH] Watchdog: Adding support for Watchdog found with ARM CortexA9
>>
>> On 5/18/2010 6:50 PM, George G. Davis wrote:
>>> Hi,
>>>
>>> On Tue, May 18, 2010 at 02:55:21PM +0530, srinidhi kasagar wrote:
>>>> I do not understand why a new driver is required while having similar one
>>>> for MPCore watchdog.
>>>> Please have a look at drivers/watchdog/mpcore_wdt.c
>>>
>>> The same thought occurred to me.  Based on a cursory glance at the Cortex-A9
>>> MPCore and ARM11 MPCore, the per-CPU watchdogs do appear to be the same
>>> and could use the same driver.
>>>
>>> Any reason for creating a new driver rather than reusing the ARM11
>>> MPCore driver?
>>>
>>
>> Sorry Guys!!! Earlier I tried to find existing driver, but couldn't found one.
>> So sent a new one.
>>
>> I went through this driver and found some shortcomings in it:
>>  - It looks it is not used by anyone now, as it required
>>    asm/hardware/arm_twd.h and it was removed in v2.6.31.
>>    So it would never compile.
>>  - It doesn't support clock framework, and works on fixed rate.
>>  - It works on fixed prescale value (256).
>>  - It doesn't support WDIOC_GETBOOTSTATUS.
>>
>> So, please suggest how to proceed as my patch contains all these features.
>>
> Can the existing driver be upgraded with all above missing pieces?
> 

yes. will be done.