From: "Stephen Neuendorffer" <stephen.neuendorffer@xilinx•com>
To: <linuxppc-dev@ozlabs•org>
Cc: git-dev <git-dev@xilinx•com>
Subject: dcr stuff.
Date: Fri, 21 Mar 2008 12:05:40 -0700 [thread overview]
Message-ID: <20080321190524.4F3491CE0087@mail160-dub.bigfish.com> (raw)
Is anybody working on the dcr infrastructure?
In particular, there seems to be inconsistency between what the kernel
does and what ePAPR thinks it should. The code in the kernel selects
mmio or native access based on a Kconfig parameter and uses some device
tree parameters to correctly configure the mmio access, whereas ePAPR
doesn't seem to document all the device tree attributes (in particular,
dcr-mmio-stride and dcr-mmio-range) and provides a dynamic binding for
dcr-access-method...
Is there a plan here? (In particular, in FPGA designs, its possible to
have crazy things like multiple independent dcr busses, some using
native access, some using mmio. Or even if there is one bus, many of
the existing non-linux drivers we have assume native or mmio access.
I'd like to clean this up, obviously.. :)
Steve
next reply other threads:[~2008-03-21 19:05 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-21 19:05 Stephen Neuendorffer [this message]
2008-03-21 21:24 ` dcr stuff Benjamin Herrenschmidt
2008-03-22 1:17 ` Josh Boyer
2008-03-24 4:34 ` Stephen Neuendorffer
2008-03-24 21:59 ` Benjamin Herrenschmidt
2008-03-24 22:18 ` Stephen Neuendorffer
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