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    SubjectRE: [PATCH 0/8] Basic ARM device tree support
    Date
    From
    > -----Original Message-----
    > From: Grant Likely [mailto:glikely@secretlab.ca] On Behalf Of Grant Likely
    > Sent: Tuesday, January 18, 2011 1:29 PM
    > To: linux-arm-kernel@lists.infradead.org
    > Cc: Nicolas Pitre; Russell King; Catalin Marinas; devicetree-discuss@lists.ozlabs.org; linux-
    > kernel@vger.kernel.org; Olof Johansson; Jeremy Kerr; John Linn; Lennert Buijtenhek
    > Subject: [PATCH 0/8] Basic ARM device tree support
    >
    > It's been a while since these patches have been circulated for review.
    > Much has changed since the last posting and there are no longer any
    > ugly hacks or workarounds to it working. From my viewpoint, these
    > patches are complete and ready to be used.
    >
    > This patch series allows CONFIG_OF to be enabled on ARM and allows the
    > kernel to accept a dtb pointer from boot firmware instead of atags.
    > If a dtb is passed, then the kernel will use the root 'compatible'
    > property to find a matching machine_desc, and it will use it to obtain
    > the memory layout, initrd location and kernel parameters string.
    >
    > Only limited device tree support is enabled here. It does not perform
    > any kind of device registration from device tree data. That support
    > will be enabled in a later patch set. Right now those patches depend
    > on the common struct clk patches that Jeremy is working on, so I'm not
    > going to post them yet. Rather, this series is a stable base that
    > other engineers can use to start working on device tree support for
    > their platforms.
    >
    > Tested on Versatile (qemu) and nVidia Tegra Harmony. Kernel compiles
    > an boot with CONFIG_OF both on and off, both with and without passing
    > a device tree blob.

    Tested on Xilinx platform. Did see an issue with loading the device
    tree blob into higher memory. At address 0 there was no issue.

    >
    > I've published this series to a new branch on my git server:
    >
    > git://git.secretlab.ca/git/linux-2.6 devicetree/arm
    >
    > The way I've managed the devicetree/test branch in the past has made
    > it hard for other engineers to work with the device tree support, so
    > I'm changing the way I'm handling it. I will *not* rebase this new
    > branch. My intention is to keep it in essentially 'merge-ready' state
    > at all times. ie. I'm only going to put patches into this branch that
    > I consider complete and are required to enable arm device tree
    > support. ie. core dt infrastructure and dt board support. Device
    > drivers should be submitted directly to their respective
    > lists/maintainers. I'll also be soliciting acks from platform
    > maintainers before I pick up board support patches into this branch.
    >
    > Russell: I'm not expecting you to merge these now, nor am I asking
    > you to. I won't do so until I've got a full implementation using the
    > device tree to register devices on the machine and supporting multiple
    > machines. However, would you mind taking a look at these patches and
    > commenting on the approach? Particularly the early boot code.
    > Thanks.
    >
    > Cheers,
    > g.
    >

    Thanks for this patch set. Device tree on ARM will be a great help to Xilinx.

    Tested-by: John Linn <john.linn@xilinx.com>

    >
    > ---
    > The following changes since commit
    > a25cecce88194b2edf38b8c3b1665e9318eb2d22:
    >
    > Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze (2011-01-18 08:06:22 -0800)
    >
    > are available in the git repository at:
    >
    > git://git.secretlab.ca/git/linux-2.6 devicetree/arm
    >
    > Grant Likely (7):
    > arm/dt: Make __vet_atags also accept a dtb image
    > arm/dt: allow bootmem reservation for device tree blob and initrd
    > arm/dt: consolidate atags setup into setup_machine_atags
    > arm/dt: probe for platforms via the device tree
    > arm/dt: Basic versatile devicetree support
    > arm/tegra: Fix tegra irq_data conversion
    > arm/dt: Basic tegra devicetree support
    >
    > Jeremy Kerr (1):
    > arm/dt: Allow CONFIG_OF on ARM
    >
    >
    > arch/arm/Kconfig | 7 ++
    > arch/arm/include/asm/mach/arch.h | 2 +
    > arch/arm/include/asm/prom.h | 34 ++++++++++
    > arch/arm/include/asm/setup.h | 4 +
    > arch/arm/kernel/Makefile | 1
    > arch/arm/kernel/devtree.c | 107 ++++++++++++++++++++++++++++++++
    > arch/arm/kernel/head-common.S | 19 ++++--
    > arch/arm/kernel/head.S | 8 +-
    > arch/arm/kernel/setup.c | 78 +++++++++++++----------
    > arch/arm/mach-tegra/board-harmony.c | 6 ++
    > arch/arm/mach-tegra/gpio.c | 4 +
    > arch/arm/mach-versatile/versatile_ab.c | 6 ++
    > arch/arm/mach-versatile/versatile_pb.c | 6 ++
    > arch/arm/mm/init.c | 23 +++++++
    > 14 files changed, 258 insertions(+), 47 deletions(-)
    > create mode 100644 arch/arm/include/asm/prom.h
    > create mode 100644 arch/arm/kernel/devtree.c
    >
    > --
    > Signature


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