linux-kernel - Re: [RFC] ARC: [plat-hsdk]: Increase SDIO CIU frequency to 50000000Hz

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Date:   Wed, 11 Oct 2017 09:23:55 -0700
From:   Vineet Gupta <Vineet.Gupta1@...opsys.com>
To:     Alexey Brodkin <Alexey.Brodkin@...opsys.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Eugeniy.Paltsev@...opsys.com" <Eugeniy.Paltsev@...opsys.com>,
        "linux-snps-arc@...ts.infradead.org" 
        <linux-snps-arc@...ts.infradead.org>
Subject: Re: [RFC] ARC: [plat-hsdk]: Increase SDIO CIU frequency to 50000000Hz

On 10/10/2017 10:29 AM, Alexey Brodkin wrote:
> Hi Vineet,
> 
> On Tue, 2017-10-10 at 10:09 -0700, Vineet Gupta wrote:
>> On 10/10/2017 09:11 AM, Eugeniy Paltsev wrote:
>>> Increase SDIO CIU frequency from 12500000Hz to 50000000Hz by
>>> switching from the default divisor value (div-by-8) to the
>>> minimum possible value of the divisor (div-by-2) in HSDK platform
>>> code.
>> Please describe the problem first not the solution. That some SD cards don't work
>> blah blah ....
>> You could add me as reported-by - just for completeness !
>>
>> While I will test it to see if it cures my issue, I'll need Alexey to sign off /
>> ack as well !
> Sure once you update us with your findings and we know it helps you
> (at least Bonnie++ stress-test with one of SD-cards here still works)
> there will be a "normal" patch which I'll ack.

Thx guys ! Patch cures the issue with my SD card.

Please respin with changelog and Reported-by/Tested-by for me !

-Vineet