On 09/11/2014 09:33 PM, Mark Brown wrote: > On Thu, Sep 11, 2014 at 03:03:50PM +0200, Javier Martinez Canillas wrote: > >> This can be easily worked around (and probably why it never was an issue) if >> the OF and SPI tables are kept in sync but I don't know if that is a hard >> requirement for all use-cases (e.g: a SPI driver that is DT only?). > > I'm not sure I see that as an interesting use case, it seems better to > have drivers usable without DT and it's trivial to do so. >
Yes, it's trivial but seems like an unnecessary duplication for me. AFAICT the OF tables are only used to match the devices in spi_match_device() but if both the OF and SPI tables must be kept in sync to properly report the module aliases to user-space then I wonder if the OF tables shouldn't just be removed from the SPI drivers since spi_match_device() will succeed anyways when calling spi_match_id(). >> I'm sending an RFC patch [1] to know what you think about it. >> [1] >> From a7cd35209a597a578df6c801e5ff7b63b584bf3e Mon Sep 17 00:00:00 2001 >> From: Javier Martinez Canillas <javier.marti...@collabora.co.uk> >> Date: Thu, 11 Sep 2014 14:31:04 +0200 >> Subject: [PATCH RFC] spi: core: report OF style modalias when probing using >> DT > > We already have a perfectly good way of sending patches. > Of course I know how to post patches properly but proposing a patch was not my intention here since as I said this could break module auto-loading for many drivers that rely on the current behavior. What I wanted was to explain with code how the SPI core could report uevents in order to be consistent with what other subsystems do (e.g: platform drivers): http://lxr.free-electrons.com/source/drivers/base/platform.c#L717 I should probably had used sharing instead of sending but as a non-native english speaker sometimes I don't always choose the best wording. Anyway, I was just raising the issue because if a driver only defines an OF table and not a SPI table, the driver will be probed correctly but module auto-loading will not work. So even when it looks like having a SPI id table is not a requirement for OF, it really is and I think that is not documented. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
