[PATCH 2/2] Add the of_find_i2c_device_by_node function, V4

[Jon Smirl]

On 7/1/08, Jean Delvare <khali at linux-fr.org> wrote:
> On Tue, 1 Jul 2008 10:45:18 -0600, Grant Likely wrote:
>  > On Tue, Jul 01, 2008 at 06:29:49PM +0200, Jean Delvare wrote:
>  > > On Tue, 1 Jul 2008 11:12:58 -0400, Jon Smirl wrote:
>  > > > On 7/1/08, Jean Delvare <khali at linux-fr.org> wrote:
>  > > > > I'm fine with this patch. In particular, exporting i2c_bus_type is OK.
>  > > > >  It was un-exported only because it had no user left, but it can be
>  > > > >  exported again if needed.
>  > > >
>  > > > Another solution would be to move drivers/of/of_i2c into the i2c
>  > > > directory and make it part of i2c core on powerpc builds.
>  > >
>  > > I don't think this is a good idea. Merging arch-specific code (or
>  > > half-arch-specific code in this case) into arch-neutral drivers ends up
>  > > being a pain to maintain. People will keep sending me patches for stuff
>  > > I don't know anything about and can't help with. Having of-specific
>  > > stuff in just one directory as is the case now sounds much better to
>  > > me. All it's missing is a MAINTAINERS entry.
>  >
>  > But the other side of the coin is that each driver must have
>  > driver-specific OF code to translate data in the device tree to data
>  > usable by the driver.  It doesn't make any sense to me for that stuff to
>  > live anywhere other that with the driver that it supports.
>
>
> This code is glue between OF and subsystems. As with any glue code, you
>  can argue forever on which side you want to push the code to. Both
>  answers are valid.
>
>  All I see on my personal side is that I don't have any system using OF
>  and no knowledge about it either, so I can't maintain of_i2c. So having
>  that file in drivers/of rather than drivers/i2c will make my life
>  easier for sure. While I'd guess that most (all?) OF-based systems have
>  an I2C bus, so whoever is responsible for drivers/of should be able to
>  maintain of_i2c.

We could modify the Makefile for i2c core to get the source out of
drivers/of and link it into i2c-core. That would remove the need to
export symbols.

Or you could move the file into the i2c directory and just put a note
on it that Grant is the maintainer.


>
>  --
>
> Jean Delvare
>


-- 
Jon Smirl
jonsmirl at gmail.com