Re: [PATCH] sdhci-fujitsu: add support for setting the CMD_DAT_DELAY attribute

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

On 6 November 2017 at 07:17, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> [...]
>
>>>>>
>>>>> Do you mean set it unconditionally? That works for me, but I have no
>>>>
>>>> Yes.
>>>>
>>>>> way of testing whether it still works on other SoCs that use this IP.
>>>>
>>>> Me neither!
>>>
>>> Hi all, I can not yet get contact with IP owner because it is a
>>> holiday in Japan.
>>> Around two years ago, F_SDH30_CMD_DAT_DELAY was a new feature of this IP.
>>> I will update the latest information as soon as I get it.
>>>
>> I got a response from IP owner.
>> He explains F_SDH30_CMD_DAT_DELAY is intended to adjust signal timing of
>> CMD/DAT lines, and it is necessary to change its value according to
>> SoC/board design.
>> So he advises us to make F_SDH30_CMD_DAT_DELAY adjustable by a DT binding.
>>
>> Kind regards
>> Vincent
>>
>>>>
>>>> Apparently there are no DTS in the kernel git that uses the
>>>> "fujitsu,mb86s70-sdhci-3.0".
>>>
>>> Around two years ago, sdhci_f_sdh30_driver was a portion for mb86s70 SoC
>>> patch series, but finally the patch series did not fully go upstream.
>>>
>
> Vincent, thanks for all the help in this!
>
> Ard, one thing, could you please split the DT doc change into a
> separate patch, preceding the change that actually do the parsing of
> the new binding.
>

Will do. Thanks.