Re: [PATCH] omap-hsmmc: Implementation of i761 errata

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On Mon, Aug 20, 2012 at 12:25 PM, Shilimkar, Santosh
<santosh.shilimkar@xxxxxx> wrote:
> On Mon, Aug 20, 2012 at 12:08 PM, S, Venkatraman <svenkatr@xxxxxx> wrote:
>>
>> On Fri, Aug 17, 2012 at 11:43 PM, Puttagunta, Viswanath <vishp@xxxxxx>
>> wrote:
[...]
>> >>> Signed-off-by: Semen Protsenko <semen.protsenko@xxxxxx>
>> >>
>> >> The implementation looks fine, but can we simply not set the errata
>> >> flag and make this as default
>> >> behaviour ? I suppose the documented behaviour with CSRE and RSP10 is
>> >> independent of the
>> >> errata..
>> >>
>> >> Also, please send it to the linux-mmc list as well.
>> >
>> > Vish>> We don't know if this errata effects OMAP5 as well. So, I think
>> > we should only do this if we are OMAP4.
>> >
>> That's precisely why the code shouldn't check for cpu_() flags. There are
>> other
>> OMAP variants as well and we can't check all of them
>> What I mean is to make the check for RSP10 and CSRE all the time as part
>> of the IRQ check.
>>   Then it equally applies to silcon with or without errata.
>
> Apart from above comment, please don't add the cpu_is_xxx() check inside
> device driver. You can pass that information from platform code
> while registering the MMC controllers using a flag and then just
> use that flag to enable/disable errata in the driver.

The other option is to check something like MMCHS_HL_REV to get the ip revision
and decide.


>
> Regards
> Santosh
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