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General info on kernel status for vr4121/MobilePro 780

To: linux-mips@linux-mips.org
Subject: General info on kernel status for vr4121/MobilePro 780
From: Ben Hodgens <ben@hodgens.net>
Date: Mon, 11 Feb 2008 18:07:48 -0700
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I'm attempting build a system around an NEC MobilePro 780, and as there does not appear to be full support (ie, can't seem to get a kernel to boot) in either the current 2.4 or 2.6 kernel trees.

Here's what I've found and tried so far:

* The Linux VR project's "latest" kernel, circa 2001 or something like that - linux-vr-0.1.1.tar.bz2. This does not actually have an option for the MobilePro 780 in the kernel config, though there is the 770. * The kernel on http://www.handhelds.org/moin/moin.cgi/NecMobilePro780. This one -appears- to be the most complete I've found with regard to the 780; however, the tree is a 2.3 base (2.3.99 or something like that, I think), and not only pretty damn old, but I'm having a difficult time building it with the MIPS Technologies toolchain as a result. (Nothing I think I won't be able to figure out eventually - just makefile issues - but I don't want to persue it too much if there's a better alternative to start with). Additionally, this page has a binary kernel (and rootfs) which boots, but it doesn't boot with either a Debian sarge or etch bootstrap-installed rootfs (this is probably related to devfs, Ithink). * Both the latest 2.4 and 2.6 kernels don't have explicit support for the MP. I don't know where to go from here to where I want to go, though if there's nothing current in the current trees, I figure I'll learn to port drivers (provided I can figure which is the current latest support for the MP).

So I'm asking: does anyone know where else I might look? If there is no current kernel tree which builds, does anyone know where the current/most up-to-date device support for the MobilePro is kept, or in which kernel it's in?

Any/all help would be appreciated. Thanks!

Ben Hodgens
ben@hodgens.net

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