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SubjectRe: [PATCH 1/2] spi: support inter-word delay requirement for devices
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On 28/01/2019 12:47, Mark Brown wrote:
> On Mon, Jan 28, 2019 at 08:41:05AM +0100, Geert Uytterhoeven wrote:
>> On Sat, Jan 26, 2019 at 4:40 PM Jonas Bonn <jonas@norrbonn.se> wrote:
>
>>> spi-3wire: again, only set by MAXIM DS-1302 which always needs this
>>> setting; driver could set this
>
>> For DS1302, this is probable true.
>> Some devices may support both 4-wire or 3-wire mode?
>
> IIRC yes.

Just for the record, the datasheet says it's exclusively 3-wire. But
it's not important...

/Jonas

>
>>> Yeah, that one make sense. But if the DT is only overriding the maximum
>>> device frequency that the driver should otherwise be setting, why is
>>> spi-max-frequency a _required_ property?
>
>> That's a good question. Legacy?
>
> It's a documentation error.
>

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