[Letux-kernel] [PATCH v9 6/8] drivers:input:ads7846(+tsc2046): fix spi module table

Dmitry Torokhov dmitry.torokhov at gmail.com
Sun Jan 29 19:01:08 CET 2017


On Sun, Jan 29, 2017 at 09:39:39AM +0100, H. Nikolaus Schaller wrote:
> Hi Dmitry,
> 
> > Am 28.01.2017 um 20:35 schrieb Dmitry Torokhov <dmitry.torokhov at gmail.com>:
> > 
> > On Wed, Dec 28, 2016 at 03:53:21PM +0100, H. Nikolaus Schaller wrote:
> >> Fix module table so that the driver is loaded if compiled
> >> as module and requested by DT.
> >> 
> > 
> > I believe I already replied to a similar patch: we alreadyhave necessary
> > aliases in this driver, we need to fix module loading to use it.
> 
> Yes, you did comment on [PATCH v6 7/8] (19 Nov 2016):
> 
> >> We really need to fix it between spi/i23c core and module utils instead
> >> of keeping adding duplicate IDs all over drivers. We already have OF
> >> module device table containing the same data, we should be able to use
> >> it.
> 
> And Javier Martinez Canillas replied (23 Nov 2016):
> 
> > Agreed, unfortunately until the I2C and SPI core are changed to properly
> > report OF modaliases, we will have to keep adding these duplicated IDs.
> > 
> > And changing the I2C and SPI core isn't trivial since it could break a
> > lot of drivers that rely on a platform modalias being reported (i.e: no
> > OF device IDs present in the drivers even when are registered via DT).
> 
> Therefore I didn't see a need to change it.

I agree that changing I2C and SPI core is not trivial, however this is
no reason for piling up workarounds in all drivers. Are you seriously
advocating going though *every* driver and copying OF data into I2C/SPI
instead of doing the right thing and fixing the root of the issue?

Thanks.

-- 
Dmitry


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