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* Heads up on a device tree change
@ 2013-02-06 13:11 Grant Likely
  2013-02-06 13:32 ` James Hogan
  0 siblings, 1 reply; 5+ messages in thread
From: Grant Likely @ 2013-02-06 13:11 UTC (permalink / raw)
  To: linux-next, Stephen Rothwell, devicetree-discuss, Rob Herring,
	Linux Kernel Mailing List

Hi Stephen,

I've just pushed out a change which cleans up platform device
registration to use the same path whether or not the device tree is
used. It should be safe, but there is a risk of breakage on powerpc

The patch has two effects of note:
- DT generated platform devices move from /sys/devices to under
/sys/devices/platform. Userspace *should* be okay with this, but if
there are any problems then I can post a workaround patch that keeps
DT generiated platform_devices in the current location.
- Resources on platform_devices get registered so they appear in
/proc/iomem and /proc/ioports and so that device drivers get the added
protection of request_region. This will cause breakage on device trees
nodes with partially overlapping memory regions. (ie. 0x100..0x1ff and
0x180..0x27f). I also have a workaround for this, but I doubt that it
will be necessary.

I'm not worried about it, but it is a sufficiently visible change that
I want you to be aware that it is there.


Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2013-04-13 19:27 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-02-06 13:11 Heads up on a device tree change Grant Likely
2013-02-06 13:32 ` James Hogan
2013-02-06 14:28   ` Grant Likely
2013-02-07 10:32     ` James Hogan
2013-04-13 19:26       ` Grant Likely

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