Re: [PATCH] i2c: core: add support for read commands longer than byte

[Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>]

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On Mon, Aug 10, 2015 at 12:06:07PM +0200, Crt Mori wrote:
> On 10 August 2015 at 11:13, Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org> wrote:
> >
> >
> > > This debate is what I wanted to have. The new Melexis sensor will be
> > > using it and since I think some others might also be using it in
> > > future I would rather put it to i2c. It is more i2c command than
> > > sensor specific so I think it fits into i2c.
> >
> > There is no thing as 'I2C command'. There are just I2C messages combined
> > into a transfer. I think you mix SMBus and I2C terminology here.
> >
> This is true, but write/read sequence can also be a request/reply
> which is basically a command for reading.

This interpretation is already a layer above. In I2C, you send a message
and then you receive one.

> Same function as my exists in: ./drivers/base/regmap/regmap-i2c.c ,
> maybe it is better just to use that?

Yes! Should have thought of that. Plus, you get more benefits like
caching if you want.

Case closed, thanks!


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