Messages in this thread | | | Subject | Re: Strange location and name for platform devices when device-tree is used. | From | Benjamin Herrenschmidt <> | Date | Fri, 01 Nov 2013 15:22:24 +1100 |
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On Fri, 2013-11-01 at 14:59 +1100, NeilBrown wrote: > and I wonder how relevant it still is in this context. As platform devices > are all in the root of the device-tree and hence are siblings, they must have > unique names in the device-tree and so the platform devices created from > them will also have unique names -- won't they?
I agree about /sys/devices -> /sys/devices/platform, that makes more sense
The problem with names is that we don't *know* that your devices are at the root and unique. They don't have to be. I have platforms that have several "chips" each containing all the same devices. They need to be de-duped.
Maybe the right approach is to build the de-duplication in sysfs itself ?
Cheers, Ben.
> Any help understanding and/or fixing this discrepancy greatly appreciated. > > The change of name is particularly annoying to me because one of my platform > devices is a pwm_bl.c backlight. With a boardfile I > get /sys/class/pwm_backlight. With devicetree the best I can get > is /sys/class/pwm_backlight.23 (or similar). It would be really nice to have > a more stable and sensible name here.
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