linux-kernel - Re: [PATCH 0/9] ARM: Initial support for Tegra 114 SoC.

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Date:	Mon, 24 Dec 2012 17:58:56 +0800
From:	Mark Zhang <nvmarkzhang@...il.com>
To:	Hiroshi Doyu <hdoyu@...dia.com>
CC:	linux-tegra@...r.kernel.org,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	John Stultz <johnstul@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Olof Johansson <olof@...om.net>,
	Jason Cooper <jason@...edaemon.net>,
	Shawn Guo <shawn.guo@...aro.org>, Andrew Lunn <andrew@...n.ch>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	devicetree-discuss@...ts.ozlabs.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/9] ARM: Initial support for Tegra 114 SoC.

On 12/20/2012 05:43 PM, Hiroshi Doyu wrote:
> Hi,
> 
> This patchset adds initial support for the NVIDIA's new Tegra 114
> SoC (T114) based on the ARM Cortex-A15 MP. It has the minimal support
> to allow the kernel to boot up into shell console. This can be used as
> a basis for adding other device drivers for this SoC. Currently there
> are 2 evaluation boards available, "Dalmore" and "Pluto".
> 
> This patchset is against Stephen Warren's linux-next_common branch:
> 
>   git://nv-tegra.nvidia.com/user/swarren/linux-2.6 linux-next_common
> 
> For those who want to try:
> 
>   $ make ARCH=arm tegra_defconfig
>   $ scripts/config -e ARCH_TEGRA_114_SOC -d DRM -d SUSPEND \
>     	-d PM_RUNTIME -d CPU_FREQ -d CPU_IDLE
>   $ make ARCH=arm menuconfig # if needed to configure more

I think we also need to enable:

CONFIG_ARM_APPENDED_DTB
CONFIG_ARM_ATAG_DTB_COMPAT

because currently we append the dtb to the kernel image(will not do this
after u-boot supports dalmore and we can load the dtb in u-boot cmd), so
we need to make kernel being aware of this.

My experience is after I enabled these 2 configs, kernel starts up normally.

Mark
>   $ make ARCH=arm all -j9
> 
> Verified that this single image booted up with "Dalmore(T114)",
> "Pluto(T114)" and "Cardhu(T30)". For "Cardhu(T30)" with this single
> image, SPI driver doesn't seem to afford the above configuration , it
> hangs at boot-up. With SPI disabled, it's ok.
> 
> 
> Hiroshi Doyu (9):
>   ARM: tegra: fuse: Add chipid TEGRA114 0x35
>   HACK: ARM: tegra: Use CLK_IGNORE_UNUSED for Tegra 114 SoC
>   ARM: tegra: # of CPU cores detection w/ & w/o HAVE_ARM_SCU
>   clocksource: tegra: Reorganize funcs by clock functionarities
>   clocksource: tegra: Enable ARM arch_timer with TSC
>   ARM: dt: tegra114: Add new SoC base, Tegra 114 SoC
>   ARM: dt: tegra114: Add new board, Dalmore
>   ARM: dt: tegra114: Add new board, Pluto
>   ARM: tegra: Add initial support for Tegra 114 SoC.
> 
>  .../bindings/arm/tegra/nvidia,tegra114-tsc.txt     |   11 +
>  arch/arm/boot/dts/Makefile                         |    4 +-
>  arch/arm/boot/dts/tegra114-dalmore.dts             |   21 ++
>  arch/arm/boot/dts/tegra114-pluto.dts               |   21 ++
>  arch/arm/boot/dts/tegra114.dtsi                    |   89 ++++++++
>  arch/arm/mach-tegra/Kconfig                        |   10 +
>  arch/arm/mach-tegra/Makefile                       |    1 +
>  arch/arm/mach-tegra/board-dt-tegra114.c            |   48 +++++
>  arch/arm/mach-tegra/common.c                       |    1 +
>  arch/arm/mach-tegra/fuse.h                         |    1 +
>  arch/arm/mach-tegra/platsmp.c                      |   31 ++-
>  arch/arm/mach-tegra/tegra30_clocks_data.c          |    2 +
>  drivers/clocksource/tegra20_timer.c                |  222 +++++++++++++-------
>  13 files changed, 384 insertions(+), 78 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra114-tsc.txt
>  create mode 100644 arch/arm/boot/dts/tegra114-dalmore.dts
>  create mode 100644 arch/arm/boot/dts/tegra114-pluto.dts
>  create mode 100644 arch/arm/boot/dts/tegra114.dtsi
>  create mode 100644 arch/arm/mach-tegra/board-dt-tegra114.c
> 
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