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authorVineet Gupta <vgupta@synopsys.com>2013-01-22 17:00:52 +0530
committerVineet Gupta <vgupta@synopsys.com>2013-02-15 23:15:55 +0530
commit999159a5381bff3bd6f688c5d20fbec9d8789e53 (patch)
treed54af343e2fa905b3d97d9dd87d763a43b256067 /arch/arc/boot
parentee36d1722112f33725ec1a7fc02f6c46e630fd27 (diff)
downloadlinux-999159a5381bff3bd6f688c5d20fbec9d8789e53.tar.bz2
ARC: [DeviceTree] Basic support
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>
Diffstat (limited to 'arch/arc/boot')
-rw-r--r--arch/arc/boot/dts/Makefile13
-rw-r--r--arch/arc/boot/dts/skeleton.dts10
-rw-r--r--arch/arc/boot/dts/skeleton.dtsi21
3 files changed, 44 insertions, 0 deletions
diff --git a/arch/arc/boot/dts/Makefile b/arch/arc/boot/dts/Makefile
new file mode 100644
index 000000000000..17dc7b8b05fa
--- /dev/null
+++ b/arch/arc/boot/dts/Makefile
@@ -0,0 +1,13 @@
+# 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
diff --git a/arch/arc/boot/dts/skeleton.dts b/arch/arc/boot/dts/skeleton.dts
new file mode 100644
index 000000000000..25a84fb5b3dc
--- /dev/null
+++ b/arch/arc/boot/dts/skeleton.dts
@@ -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"
diff --git a/arch/arc/boot/dts/skeleton.dtsi b/arch/arc/boot/dts/skeleton.dtsi
new file mode 100644
index 000000000000..9b357d802a10
--- /dev/null
+++ b/arch/arc/boot/dts/skeleton.dtsi
@@ -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>; };
+};