linux-kernel - Re: [PATCH 3/5] x86/of: Add building device tree blob(s) into image.

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Date:	Tue, 16 Nov 2010 23:02:27 -0700
From:	Grant Likely <grant.likely@...retlab.ca>
To:	dirk.brandewie@...il.com
Cc:	devicetree-discuss@...ts.ozlabs.org, linux-arch@...r.kernel.org,
	linux-kbuild@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org, sodaville@...utronix.de,
	microblaze-uclinux@...e.uq.edu.au, arjan@...ux.intel.com
Subject: Re: [PATCH 3/5] x86/of:  Add building device tree blob(s) into
 image.

On Tue, Nov 16, 2010 at 02:41:38PM -0800, dirk.brandewie@...il.com wrote:
> From: Dirk Brandewie <dirk.brandewie@...il.com>
> 
> This patch adds linking device tree blobs into vmlinux. DTB's are
> added by adding the blob object name to list of objects to be linked
> into the image.
> e.g:
>   obj-$(CONFIG_TEST_DTB) += test.dtb.o
> 
> The set of DTB linked into the image is controlled the Kconfig file
> in arch/x86/kernel/dts/Kconfig
> 
> Signed-off-by: Dirk Brandewie <dirk.brandewie@...il.com>
> ---
>  arch/x86/Kconfig            |    6 +++++-
>  arch/x86/kernel/Makefile    |    6 ++++++
>  arch/x86/kernel/dts/Kconfig |    7 +++++++
>  3 files changed, 18 insertions(+), 1 deletions(-)
>  create mode 100644 arch/x86/kernel/dts/Kconfig
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index 5904f38..f2f516a 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -299,13 +299,17 @@ config X86_BIGSMP
>  	---help---
>  	  This option is needed for the systems that have more than 8 CPUs
>  
> -config X86_OF
> +menuconfig X86_OF
>  	bool "Support for device tree"
>  	select OF
>  	select OF_FLATTREE
>  	---help---
>  	  Device tree support on X86.
>  
> +if X86_OF
> +source arch/x86/kernel/dts/Kconfig
> +endif
> +
>  if X86_32
>  config X86_EXTENDED_PLATFORM
>  	bool "Support for extended (non-PC) x86 platforms"
> diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
> index 586df14..49e017d 100644
> --- a/arch/x86/kernel/Makefile
> +++ b/arch/x86/kernel/Makefile
> @@ -114,6 +114,12 @@ obj-$(CONFIG_SWIOTLB)			+= pci-swiotlb.o
>  obj-$(CONFIG_X86_OF)			+= prom.o
>  
>  ###
> +# device tree blobs
> +obj-$(CONFIG_CE4100_DTB) += ce4100.dtb.o
> +obj-$(CONFIG_TEST_DTB) += test.dtb.o
> +
> +
> +###
>  # 64 bit specific files
>  ifeq ($(CONFIG_X86_64),y)
>  	obj-$(CONFIG_AUDIT)		+= audit_64.o
> diff --git a/arch/x86/kernel/dts/Kconfig b/arch/x86/kernel/dts/Kconfig
> new file mode 100644
> index 0000000..d3e5cd4
> --- /dev/null
> +++ b/arch/x86/kernel/dts/Kconfig
> @@ -0,0 +1,7 @@
> +config CE4100_DTB
> +       bool "Intel CE4100"
> +
> +config TEST_DTB
> +       bool "Test DTS"
> +
> +

As previously mentioned, this isn't going to scale.  Need to look at
allowing the user to specify a list of .dtbs that will be linked in.

g.

> -- 
> 1.7.2.3
> 
> _______________________________________________
> devicetree-discuss mailing list
> devicetree-discuss@...ts.ozlabs.org
> https://lists.ozlabs.org/listinfo/devicetree-discuss
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