Messages in this thread | | | Date | Fri, 4 Sep 2015 16:37:18 +0100 | From | Mark Brown <> | Subject | Re: [LINUX RFC v2 1/4] spi: add support of two chip selects & data stripe |
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On Fri, Sep 04, 2015 at 02:35:52PM +0200, Martin Sperl wrote: > > On 03.09.2015, at 14:12, Mark Brown <broonie@kernel.org> wrote:
> > This isn't saying that the controller supports more than one chip, it's > > saying that the controller supports asserting more than one chip select > > at once which isn't the same thing. I'm also not entirely sure that > > this makes sense as a separate feature to the data striping one - I'm > > struggling to think of a way to use this sensibly separately to that.
> Well - there is one use-case that I can think of: > fbtft has the requirement for some devices to control a GPIO to > differentiate between command and data getting transferred > - sort of 9 bit.
That's another thing again, isn't it? It's one device switching between two different control interfaces at runtime rather than two devices controlled in lockstep. [unhandled content-type:application/pgp-signature] | |