Re: [PATCH] Documentation: dt: mtd: replace "nor-jedec" binding with "jedec,spi-nor"

[RafaÅ MiÅecki]

On 21 May 2015 at 10:58, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> On Thu, May 21, 2015 at 10:50 AM, RafaÅ MiÅecki <zajec5@xxxxxxxxx> wrote:
>>>>> I think your comments suggest that I shouldn't be removing "spi-nor"
>>>>> from m25p_ids[] nor from this block:
>>>>>
>>>>>         if (data && data->type)
>>>>>                 flash_name = data->type;
>>>>>         else if (!strcmp(spi->modalias, "spi-nor"))
>>>>>                 flash_name = NULL; /* auto-detect */
>>>>>         else
>>>>>                 flash_name = spi->modalias;
>>>>>
>>>>> So it stays in both m25p_ids[] and .of_match_table.
>>>>>
>>>>> I suppose that can work. It then allows people to do weird stuff like:
>>>>>
>>>>>         compatible = "idontknowwhatimdoing,spi-nor";
>>>>>
>>>>> in their device tree. But other than that, there's not much downside I don't
>>>>> think.
>>>>
>>>> It sounds like a reasonable solution. I guess there isn't a perfect
>>>> one. Even if we decide to go for sth like "jedec-spi-nor", there
>>>> always will be a chance of someone using
>>>> compatible = "idontknowwhatimdoing,jedec-spi-nor";
>>>> So if you rework your patch to leave "spi-nor" support in m25p_ids and
>>>> conditions block, it should be OK.
>>>
>>> Typically platform devices just use the driver's name. Hence IMHO there's
>>> no need to add a shiny new spi-nor device name.
>>>
>>> So what's wrong with using "m25p80", and treating that as auto-detect iff
>>> !spi->dev.of_node?
>>
>> Treating "m25p80" as auto-detect triggering string won't allow
>> platform to *force* "m25p80" flash type if there ever appears to be
>> needed. Maybe it's unlikely, but it still sounds like a bit bad design
>> for me.
>
> To force m25p80 flash, you set flash_platform_data.type to "m25p80"?

Oh, I think I got lost in the way m25p80 is probed. Is it handled by
spi_board_info and its "modalias"?

Could I leave flash_platform_data.type set to NULL and still have m25p80 probed?

-- 
RafaÅ
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/