[lkml]   [2015]   [Feb]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 2/2] drivers/core/of: Add symlink to device-tree from devices with an OF node
On Sun, Feb 15, 2015 at 7:59 PM, Benjamin Herrenschmidt
<> wrote:
> So I've been annoyed lately with having a bunch of devices such as i2c
> eeproms (for use by VPDs, server world !) and other bits and pieces that
> I want to be able to identify from userspace, and possibly provide
> additional data about from FW.
> Basically, it boils down to correlating the sysfs device with the OF
> tree device node, so that user space can use device-tree info such as
> additional "location" or "label" (or whatever else we can come up with)
> properties to identify a given device, or get some attributes of use
> about it, etc...
> Now, so far, we've done that in some subsystem in a fairly ad-hoc basis
> using "devspec" properties. For example, PCI creates them if it can
> correlate the probed device with a DT node. Some powerpc specific busses
> do that too.
> However, i2c doesn't and it would be nice to have something more generic
> since technically any device can have a corresponding device tree node
> these days.
> This patch achieves this by adding an "of_node" symlink to devices that
> have a non-NULL dev->of_node pointer.
> Signed-off-by: Benjamin Herrenschmidt <>


Acked-by: Olof Johansson <>

We've come across similar needs on product, and always had to do some
less-than-optimal alternate solution. This seems like a good idea to


 \ /
  Last update: 2015-02-17 23:41    [W:0.106 / U:5.756 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site