[PATCH] ARM: integrator: fix OF-related regression

On Thu, Jun 26, 2014 at 9:39 PM, Rabin Vincent [off-list ref] wrote:

earlyprintk doesn't work on Integrator hardware?

It does, but loading the kernel is done over serial line 115200 bps
so iterative tests take "some time" :-)

It does on QEMU's
integratorcp so it's trivial to debug there.

Yeah I should be using QEMU for things like this ... poke self.

The problem is that integrator_init_sysfs() adds a device attribute
called "fpga" to the soc0 bus, and the soc0 bus device is also used as
the root of the device tree, and the device tree has a node called "fpga".

(...)

07e461cd7e73a84f0e3757932b93cc80976fd749 removed the .0 from the fpga node's
directory, leading to that node (and its subnodes) failing to register due to a
filename conflict with the fpga attribute's file:

Aha! Thanks for root-causing this Rabin. Awesome.

After Linus' patch, the root is no longer soc0 so the fpga node's directory
becomes /devices/fpga while the attribute file remains at /devices/soc0/fpga.

It appears the patch is doing the right thing, though I had very vague
ideas as to why.

Yours,
Linus Walleij