Hello Nikolaus, On 02/01/2017 05:20 PM, H. Nikolaus Schaller wrote: > Hi Dmitry, Javier, > >> Am 29.01.2017 um 19:25 schrieb H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>: >> >> Hi Dmitry, >> >>> Am 29.01.2017 um 19:01 schrieb Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>: >>> >>> 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@xxxxxxxxx>: >>>>> >>>>> 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? >> >> If you prefer to have this done (and I agree it would be a tiny improvement), >> please do it for us all. But please after merging this workaround. > > Have we been lucky to find someone who is able and willing to work on this? > As said, changing the core is trivial. A RFC patch is [0]. The problem is how to make sure that this change won't cause regressions in existing drivers. There was particularly tricky for the spi-nor driver, it doesn't help that a lot of DT are using undocumented compatible strings (sometimes with no vendor prefix). You can see the discussion here [1]. In the same thread Mark Brown said that it wasn't that bad to have the information in the OF device ID table duplicated in a SPI device table. Certainly isn't the best approach but IMHO is better than the module not loading. https://patchwork.kernel.org/patch/7041141/ https://patchwork.ozlabs.org/patch/545125/ > If not, I'd recommend to stay with the current level of optimality. > > BR and thanks, > Nikolaus > Best regards, -- Javier Martinez Canillas Open Source Group Samsung Research America -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
