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ARC: [DeviceTree] Basic support

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This is minimal infrastructure needed for devicetree work.
It uses an a sample "skeleton" devicetree - embedded in kernel image -
to print the board, manufacturer by parsing the top-level "compatible"
string.

As of now we don't need any additional "board" specific "machine_desc".

TODO: support interpreting the command line as boot-loader passed dtb

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Rob Herring <rob.herring@calxeda.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
This commit is contained in:
Vineet Gupta
2013-01-22 17:00:52 +05:30
parent ee36d17221
commit 999159a538
11 changed files with 165 additions and 0 deletions
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13
arch/arc/boot/dts/Makefile Normal file
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# Built-in dtb
builtindtb-y := skeleton
ifneq ($(CONFIG_ARC_BUILTIN_DTB_NAME),"")
builtindtb-y := $(patsubst "%",%,$(CONFIG_ARC_BUILTIN_DTB_NAME))
endif
obj-y += $(builtindtb-y).dtb.o
targets += $(builtindtb-y).dtb
dtbs: $(addprefix $(obj)/, $(builtindtb-y).dtb)
clean-files := *.dtb

10
arch/arc/boot/dts/skeleton.dts Normal file
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@@ -0,0 +1,10 @@
/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/dts-v1/;
/include/ "skeleton.dtsi"

21
arch/arc/boot/dts/skeleton.dtsi Normal file
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@@ -0,0 +1,21 @@
/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* Skeleton device tree; the bare minimum needed to boot; just include and
* add a compatible value.
*/
/ {
compatible = "snps,arc";
#address-cells = <1>;
#size-cells = <1>;
chosen { };
aliases { };
memory { device_type = "memory"; reg = <0 0>; };
};