[PATCH v4] dtb: Create a common home for cross-architecture dtsi files.

[PATCH v4] dtb: Create a common home for cross-architecture dtsi files.

[Ian Campbell]

Commit 9ccd608070b6 ("arm64: dts: add device tree for ARM SMM-A53x2 on
LogicTile Express 20MG") added a new dts file to arch/arm64 which
included "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi", i.e. a
.dtsi supplied by arch/arm.

Unfortunately this causes some issues for the split device tree
repository[0], since things get moved around there. In that context
the new .dts ends up at src/arm64/arm/vexpress-v2f-1xv7-ca53x2.dts
while the include is at src/arm/vexpress-v2m-rs1.dtsi.

The sharing of the .dtsi is legitimate since the baseboard is the same
for various vexpress systems whatever processor they use.

Rather than using ../../ tricks to pickup .dtsi files from another
arch this patch creates a new directory kernel/dts as a home for such
cross-arch .dtsi files, arranges for it to be in the include path when
the .dts files are processed by cpp and switches the .dts files to use
cpp #include instead of /include/. The dtsi file itself is moved into
a vendor subdir in this case "arm" (the vendor, not the ARCH=).

[0] https://git.kernel.org/cgit/linux/kernel/git/devicetree/devicetree-rebasing.git/

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Kristina Martsenko <kristina.martsenko@arm.com>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kbuild@vger.kernel.org
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
v2: Move to include/dt-dtsi and introduce a per-vendor subdirectory.

v3: Move to kernel/dts.
    Include new directory in DTC include path as well as cpp path, and
    therefore switch back to /include/.
    Update MAINTAINERS

v4: Change path in changelog too.
    Add ()s to title of 9ccd608070b6.
---
 Documentation/devicetree/bindings/arm/vexpress.txt          | 2 +-
 MAINTAINERS                                                 | 1 +
 arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts                 | 2 +-
 arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts                  | 2 +-
 arch/arm/boot/dts/vexpress-v2p-ca5s.dts                     | 2 +-
 arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts        | 2 +-
 {arch/arm/boot/dts => kernel/dts/arm}/vexpress-v2m-rs1.dtsi | 0
 scripts/Makefile.lib                                        | 3 ++-
 8 files changed, 8 insertions(+), 6 deletions(-)
 rename {arch/arm/boot/dts => kernel/dts/arm}/vexpress-v2m-rs1.dtsi (100%)

diff --git a/Documentation/devicetree/bindings/arm/vexpress.txt b/Documentation/devicetree/bindings/arm/vexpress.txt
index 39844cd..b6031d9 100644
--- a/Documentation/devicetree/bindings/arm/vexpress.txt
+++ b/Documentation/devicetree/bindings/arm/vexpress.txt
@@ -223,7 +223,7 @@ Example of a VE tile description (simplified)
 		/* Active high IRQ 0 is connected to GIC's SPI0 */
 		interrupt-map = <0 0 0 &gic 0 0 4>;
 
-		/include/ "vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
 
diff --git a/MAINTAINERS b/MAINTAINERS
index a226416..1941078 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7537,6 +7537,7 @@ S:	Maintained
 F:	Documentation/devicetree/
 F:	arch/*/boot/dts/
 F:	include/dt-bindings/
+F:	kernel/dts/
 
 OPEN FIRMWARE AND DEVICE TREE OVERLAYS
 M:	Pantelis Antoniou <pantelis.antoniou@konsulko.com>
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
index 9420053..b144092 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
@@ -278,6 +278,6 @@
 				<0 0 41 &gic 0 41 4>,
 				<0 0 42 &gic 0 42 4>;
 
-		/include/ "vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
index 17f63f7..350f402 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
@@ -636,6 +636,6 @@
 				<0 0 41 &gic 0 41 4>,
 				<0 0 42 &gic 0 42 4>;
 
-		/include/ "vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
index d2709b7..585ced0 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
@@ -248,6 +248,6 @@
 				<0 0 41 &gic 0 41 4>,
 				<0 0 42 &gic 0 42 4>;
 
-		/include/ "vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
diff --git a/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts b/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
index 5b1d018..c044804 100644
--- a/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
+++ b/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
@@ -186,6 +186,6 @@
 				<0 0 41 &gic GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
 				<0 0 42 &gic GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
 
-		/include/ "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
diff --git a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi b/kernel/dts/arm/vexpress-v2m-rs1.dtsi
similarity index 100%
rename from arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
rename to kernel/dts/arm/vexpress-v2m-rs1.dtsi
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 79e8661..b4d9fb6 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -163,6 +163,7 @@ dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
 		 -I$(srctree)/arch/$(SRCARCH)/boot/dts                   \
 		 -I$(srctree)/arch/$(SRCARCH)/boot/dts/include           \
 		 -I$(srctree)/drivers/of/testcase-data                   \
+		 -I$(srctree)/kernel/dts                                 \
 		 -undef -D__DTS__
 
 # Finds the multi-part object the current object will be linked into
@@ -285,7 +286,7 @@ quiet_cmd_dtc = DTC     $@
 cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
 	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
 	$(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
-		-i $(dir $<) $(DTC_FLAGS) \
+		-i $(dir $<) -i $(srctree)/kernel/dts $(DTC_FLAGS) \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
-- 
2.1.4

Re: [PATCH v4] dtb: Create a common home for cross-architecture dtsi files.

[Rob Herring]

On Mon, Aug 3, 2015 at 3:55 AM, Ian Campbell <ian.campbell@citrix.com> wrote:
> Commit 9ccd608070b6 ("arm64: dts: add device tree for ARM SMM-A53x2 on
> LogicTile Express 20MG") added a new dts file to arch/arm64 which
> included "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi", i.e. a
> .dtsi supplied by arch/arm.
>
> Unfortunately this causes some issues for the split device tree
> repository[0], since things get moved around there. In that context
> the new .dts ends up at src/arm64/arm/vexpress-v2f-1xv7-ca53x2.dts
> while the include is at src/arm/vexpress-v2m-rs1.dtsi.
>
> The sharing of the .dtsi is legitimate since the baseboard is the same
> for various vexpress systems whatever processor they use.
>
> Rather than using ../../ tricks to pickup .dtsi files from another
> arch this patch creates a new directory kernel/dts as a home for such
> cross-arch .dtsi files, arranges for it to be in the include path when
> the .dts files are processed by cpp and switches the .dts files to use
> cpp #include instead of /include/. The dtsi file itself is moved into
> a vendor subdir in this case "arm" (the vendor, not the ARCH=).

Sigh, it was not the include path I was referring to being wrong
although that was too. It was the part about using #include instead of
/include/.

Rob

>
> [0] https://git.kernel.org/cgit/linux/kernel/git/devicetree/devicetree-rebasing.git/
>
> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Pawel Moll <pawel.moll@arm.com>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Kumar Gala <galak@codeaurora.org>
> Cc: Liviu Dudau <liviu.dudau@arm.com>
> Cc: Sudeep Holla <sudeep.holla@arm.com>
> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Cc: Russell King <linux@arm.linux.org.uk>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Cc: Kristina Martsenko <kristina.martsenko@arm.com>
> Cc: Kevin Hilman <khilman@linaro.org>
> Cc: devicetree@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-kbuild@vger.kernel.org
> Acked-by: Mark Rutland <mark.rutland@arm.com>
> Acked-by: Rob Herring <robh@kernel.org>
> Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> ---
> v2: Move to include/dt-dtsi and introduce a per-vendor subdirectory.
>
> v3: Move to kernel/dts.
>     Include new directory in DTC include path as well as cpp path, and
>     therefore switch back to /include/.
>     Update MAINTAINERS
>
> v4: Change path in changelog too.
>     Add ()s to title of 9ccd608070b6.
> ---
>  Documentation/devicetree/bindings/arm/vexpress.txt          | 2 +-
>  MAINTAINERS                                                 | 1 +
>  arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts                 | 2 +-
>  arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts                  | 2 +-
>  arch/arm/boot/dts/vexpress-v2p-ca5s.dts                     | 2 +-
>  arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts        | 2 +-
>  {arch/arm/boot/dts => kernel/dts/arm}/vexpress-v2m-rs1.dtsi | 0
>  scripts/Makefile.lib                                        | 3 ++-
>  8 files changed, 8 insertions(+), 6 deletions(-)
>  rename {arch/arm/boot/dts => kernel/dts/arm}/vexpress-v2m-rs1.dtsi (100%)
>
> diff --git a/Documentation/devicetree/bindings/arm/vexpress.txt b/Documentation/devicetree/bindings/arm/vexpress.txt
> index 39844cd..b6031d9 100644
> --- a/Documentation/devicetree/bindings/arm/vexpress.txt
> +++ b/Documentation/devicetree/bindings/arm/vexpress.txt
> @@ -223,7 +223,7 @@ Example of a VE tile description (simplified)
>                 /* Active high IRQ 0 is connected to GIC's SPI0 */
>                 interrupt-map = <0 0 0 &gic 0 0 4>;
>
> -               /include/ "vexpress-v2m-rs1.dtsi"
> +               /include/ "arm/vexpress-v2m-rs1.dtsi"
>         };
>  };
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index a226416..1941078 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -7537,6 +7537,7 @@ S:        Maintained
>  F:     Documentation/devicetree/
>  F:     arch/*/boot/dts/
>  F:     include/dt-bindings/
> +F:     kernel/dts/
>
>  OPEN FIRMWARE AND DEVICE TREE OVERLAYS
>  M:     Pantelis Antoniou <pantelis.antoniou@konsulko.com>
> diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
> index 9420053..b144092 100644
> --- a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
> +++ b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
> @@ -278,6 +278,6 @@
>                                 <0 0 41 &gic 0 41 4>,
>                                 <0 0 42 &gic 0 42 4>;
>
> -               /include/ "vexpress-v2m-rs1.dtsi"
> +               /include/ "arm/vexpress-v2m-rs1.dtsi"
>         };
>  };
> diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
> index 17f63f7..350f402 100644
> --- a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
> +++ b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
> @@ -636,6 +636,6 @@
>                                 <0 0 41 &gic 0 41 4>,
>                                 <0 0 42 &gic 0 42 4>;
>
> -               /include/ "vexpress-v2m-rs1.dtsi"
> +               /include/ "arm/vexpress-v2m-rs1.dtsi"
>         };
>  };
> diff --git a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
> index d2709b7..585ced0 100644
> --- a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
> +++ b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
> @@ -248,6 +248,6 @@
>                                 <0 0 41 &gic 0 41 4>,
>                                 <0 0 42 &gic 0 42 4>;
>
> -               /include/ "vexpress-v2m-rs1.dtsi"
> +               /include/ "arm/vexpress-v2m-rs1.dtsi"
>         };
>  };
> diff --git a/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts b/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
> index 5b1d018..c044804 100644
> --- a/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
> +++ b/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
> @@ -186,6 +186,6 @@
>                                 <0 0 41 &gic GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
>                                 <0 0 42 &gic GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
>
> -               /include/ "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi"
> +               /include/ "arm/vexpress-v2m-rs1.dtsi"
>         };
>  };
> diff --git a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi b/kernel/dts/arm/vexpress-v2m-rs1.dtsi
> similarity index 100%
> rename from arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
> rename to kernel/dts/arm/vexpress-v2m-rs1.dtsi
> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index 79e8661..b4d9fb6 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -163,6 +163,7 @@ dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
>                  -I$(srctree)/arch/$(SRCARCH)/boot/dts                   \
>                  -I$(srctree)/arch/$(SRCARCH)/boot/dts/include           \
>                  -I$(srctree)/drivers/of/testcase-data                   \
> +                -I$(srctree)/kernel/dts                                 \
>                  -undef -D__DTS__
>
>  # Finds the multi-part object the current object will be linked into
> @@ -285,7 +286,7 @@ quiet_cmd_dtc = DTC     $@
>  cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
>         $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
>         $(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
> -               -i $(dir $<) $(DTC_FLAGS) \
> +               -i $(dir $<) -i $(srctree)/kernel/dts $(DTC_FLAGS) \
>                 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
>         cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
>
> --
> 2.1.4
>

Re: [PATCH v4] dtb: Create a common home for cross-architecture dtsi files.

[Ian Campbell]

On Mon, 2015-08-03 at 10:55 -0500, Rob Herring wrote:
> On Mon, Aug 3, 2015 at 3:55 AM, Ian Campbell <ian.campbell@citrix.com> 
> wrote:
> > Commit 9ccd608070b6 ("arm64: dts: add device tree for ARM SMM-A53x2 on
> > LogicTile Express 20MG") added a new dts file to arch/arm64 which
> > included "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi", i.e. a
> > .dtsi supplied by arch/arm.
> > 
> > Unfortunately this causes some issues for the split device tree
> > repository[0], since things get moved around there. In that context
> > the new .dts ends up at src/arm64/arm/vexpress-v2f-1xv7-ca53x2.dts
> > while the include is at src/arm/vexpress-v2m-rs1.dtsi.
> > 
> > The sharing of the .dtsi is legitimate since the baseboard is the same
> > for various vexpress systems whatever processor they use.
> > 
> > Rather than using ../../ tricks to pickup .dtsi files from another
> > arch this patch creates a new directory kernel/dts as a home for such
> > cross-arch .dtsi files, arranges for it to be in the include path when
> > the .dts files are processed by cpp and switches the .dts files to use
> > cpp #include instead of /include/. The dtsi file itself is moved into
> > a vendor subdir in this case "arm" (the vendor, not the ARCH=).
> 
> Sigh, it was not the include path I was referring to being wrong
> although that was too. It was the part about using #include instead of
> /include/.

Damn, how did I miss that!

v5 coming up, sorry :-/

Re: [PATCH v4] dtb: Create a common home for cross-architecture dtsi files.

[Ian Campbell]

On Tue, 2015-08-11 at 13:00 +0900, Masahiro Yamada wrote:
> Hi
> 
> 2015-08-04 1:06 GMT+09:00 Ian Campbell <ian.campbell@citrix.com>:
> > Commit 9ccd608070b6 ("arm64: dts: add device tree for ARM SMM-A53x2 on
> > LogicTile Express 20MG") added a new dts file to arch/arm64 which
> > included "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi", i.e. a
> > .dtsi supplied by arch/arm.
> > 
> > Unfortunately this causes some issues for the split device tree
> > repository[0], since things get moved around there. In that context
> > the new .dts ends up at src/arm64/arm/vexpress-v2f-1xv7-ca53x2.dts
> > while the include is at src/arm/vexpress-v2m-rs1.dtsi.
> > 
> > The sharing of the .dtsi is legitimate since the baseboard is the same
> > for various vexpress systems whatever processor they use.
> > 
> > Rather than using ../../ tricks to pickup .dtsi files from another
> > arch this patch creates a new directory kernel/dts as a home for such
> > cross-arch .dtsi files and arranges for it to be in the include path
> > for both dtc and cpp. The dtsi file itself is moved into a vendor
> > subdir in this case "arm" (the vendor, not the ARCH=).
> 
> 
> Question:
> If this patch is applied, which directory will be created in
> device-tree-rebasing?
> src/kernel/, src/common/, or something else?
> Either will do, of course.

Below is the patch against the device-tree-rebasing.git, I went (pretty
much arbitrarily) with common at the top level.

commit 0524b00e5bd7b98a2a9ef85c1f5f2a8d93bcbeb6
Author: Ian Campbell <ian.campbell@citrix.com>
Date:   Tue Jul 21 17:27:13 2015 +0100

    Handle new kernel/dts subtree.
    
    Rewrite its contents to common/ and include in the CPP and DTC include
    paths.
    
    Signed-off-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/Makefile b/Makefile
index 5e8930c..b57107d 100644
--- a/Makefile
+++ b/Makefile
@@ -114,12 +114,13 @@ dtc-tmp = $(subst $(comma),_,$(dot-target).dts.tmp)
 
 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc	\
                  -Iinclude -I$(src) -Itestcase-data	\
+                 -Icommon				\
                  -undef -D__DTS__
 
 quiet_cmd_dtc = DTC     $@
 cmd_dtc = $(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
         $(DTC) -O dtb -o $@ -b 0 \
-                -i $(src) $(DTC_FLAGS) \
+                -i $(src) -i common $(DTC_FLAGS) \
                 -d $(depfile).dtc.tmp $(dtc-tmp) ; \
         cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
diff --git a/scripts/rewrite-paths.sed b/scripts/rewrite-paths.sed
index b73fbce..5269769 100644
--- a/scripts/rewrite-paths.sed
+++ b/scripts/rewrite-paths.sed
@@ -33,6 +33,7 @@ s,\tarch/\([^/]*\)/boot/dts/\(.*\.h\)$,\tsrc/\1/\2,gp
 # Also rewrite the DTS include paths for dtc+cpp support
 s,\tarch/\([^/]*\)/include/dts/,\tsrc/\1/include/,gp
 s,\tinclude/dt-bindings/,\tinclude/dt-bindings/,gp
+s,\tkernel/dts/,\tcommon/,gp
 
 # Rewrite the bindings subdirectory
 s,\tDocumentation/devicetree/bindings/,\tBindings/,gp

Re: [PATCH v4] dtb: Create a common home for cross-architecture dtsi files.

[Masahiro Yamada]

Hi

2015-08-04 1:06 GMT+09:00 Ian Campbell <ian.campbell@citrix.com>:
> Commit 9ccd608070b6 ("arm64: dts: add device tree for ARM SMM-A53x2 on
> LogicTile Express 20MG") added a new dts file to arch/arm64 which
> included "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi", i.e. a
> .dtsi supplied by arch/arm.
>
> Unfortunately this causes some issues for the split device tree
> repository[0], since things get moved around there. In that context
> the new .dts ends up at src/arm64/arm/vexpress-v2f-1xv7-ca53x2.dts
> while the include is at src/arm/vexpress-v2m-rs1.dtsi.
>
> The sharing of the .dtsi is legitimate since the baseboard is the same
> for various vexpress systems whatever processor they use.
>
> Rather than using ../../ tricks to pickup .dtsi files from another
> arch this patch creates a new directory kernel/dts as a home for such
> cross-arch .dtsi files and arranges for it to be in the include path
> for both dtc and cpp. The dtsi file itself is moved into a vendor
> subdir in this case "arm" (the vendor, not the ARCH=).


Question:
If this patch is applied, which directory will be created in
device-tree-rebasing?
src/kernel/, src/common/, or something else?
Either will do, of course.


Another nit:
I just noticed a period at the end of the commit subject.
Re-post would not be needed only for such a minor thing,
but please try best to remember to drop it when this patch is applied.




-- 
Best Regards
Masahiro Yamada

[PATCH v4] dtb: Create a common home for cross-architecture dtsi files.

[Ian Campbell]

Commit 9ccd608070b6 ("arm64: dts: add device tree for ARM SMM-A53x2 on
LogicTile Express 20MG") added a new dts file to arch/arm64 which
included "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi", i.e. a
.dtsi supplied by arch/arm.

Unfortunately this causes some issues for the split device tree
repository[0], since things get moved around there. In that context
the new .dts ends up at src/arm64/arm/vexpress-v2f-1xv7-ca53x2.dts
while the include is at src/arm/vexpress-v2m-rs1.dtsi.

The sharing of the .dtsi is legitimate since the baseboard is the same
for various vexpress systems whatever processor they use.

Rather than using ../../ tricks to pickup .dtsi files from another
arch this patch creates a new directory kernel/dts as a home for such
cross-arch .dtsi files and arranges for it to be in the include path
for both dtc and cpp. The dtsi file itself is moved into a vendor
subdir in this case "arm" (the vendor, not the ARCH=).

[0] https://git.kernel.org/cgit/linux/kernel/git/devicetree/devicetree-rebasing.git/

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Kristina Martsenko <kristina.martsenko@arm.com>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kbuild@vger.kernel.org
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
v2: Move to include/dt-dtsi and introduce a per-vendor subdirectory.

v3: Move to kernel/dts.
    Include new directory in DTC include path as well as cpp path, and
    therefore switch back to /include/.
    Update MAINTAINERS

v4: Change path in changelog too.
    Add ()s to title of 9ccd608070b6.

v5: Remove stale reference to switching from /include/ to #include.
---
 Documentation/devicetree/bindings/arm/vexpress.txt          | 2 +-
 MAINTAINERS                                                 | 1 +
 arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts                 | 2 +-
 arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts                  | 2 +-
 arch/arm/boot/dts/vexpress-v2p-ca5s.dts                     | 2 +-
 arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts        | 2 +-
 {arch/arm/boot/dts => kernel/dts/arm}/vexpress-v2m-rs1.dtsi | 0
 scripts/Makefile.lib                                        | 3 ++-
 8 files changed, 8 insertions(+), 6 deletions(-)
 rename {arch/arm/boot/dts => kernel/dts/arm}/vexpress-v2m-rs1.dtsi (100%)

diff --git a/Documentation/devicetree/bindings/arm/vexpress.txt b/Documentation/devicetree/bindings/arm/vexpress.txt
index 39844cd..b6031d9 100644
--- a/Documentation/devicetree/bindings/arm/vexpress.txt
+++ b/Documentation/devicetree/bindings/arm/vexpress.txt
@@ -223,7 +223,7 @@ Example of a VE tile description (simplified)
 		/* Active high IRQ 0 is connected to GIC's SPI0 */
 		interrupt-map = <0 0 0 &gic 0 0 4>;
 
-		/include/ "vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
 
diff --git a/MAINTAINERS b/MAINTAINERS
index a226416..1941078 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7537,6 +7537,7 @@ S:	Maintained
 F:	Documentation/devicetree/
 F:	arch/*/boot/dts/
 F:	include/dt-bindings/
+F:	kernel/dts/
 
 OPEN FIRMWARE AND DEVICE TREE OVERLAYS
 M:	Pantelis Antoniou <pantelis.antoniou@konsulko.com>
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
index 9420053..b144092 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
@@ -278,6 +278,6 @@
 				<0 0 41 &gic 0 41 4>,
 				<0 0 42 &gic 0 42 4>;
 
-		/include/ "vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
index 17f63f7..350f402 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
@@ -636,6 +636,6 @@
 				<0 0 41 &gic 0 41 4>,
 				<0 0 42 &gic 0 42 4>;
 
-		/include/ "vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
index d2709b7..585ced0 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
@@ -248,6 +248,6 @@
 				<0 0 41 &gic 0 41 4>,
 				<0 0 42 &gic 0 42 4>;
 
-		/include/ "vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
diff --git a/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts b/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
index 5b1d018..c044804 100644
--- a/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
+++ b/arch/arm64/boot/dts/arm/vexpress-v2f-1xv7-ca53x2.dts
@@ -186,6 +186,6 @@
 				<0 0 41 &gic GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>,
 				<0 0 42 &gic GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
 
-		/include/ "../../../../arm/boot/dts/vexpress-v2m-rs1.dtsi"
+		/include/ "arm/vexpress-v2m-rs1.dtsi"
 	};
 };
diff --git a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi b/kernel/dts/arm/vexpress-v2m-rs1.dtsi
similarity index 100%
rename from arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
rename to kernel/dts/arm/vexpress-v2m-rs1.dtsi
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 79e8661..b4d9fb6 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -163,6 +163,7 @@ dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
 		 -I$(srctree)/arch/$(SRCARCH)/boot/dts                   \
 		 -I$(srctree)/arch/$(SRCARCH)/boot/dts/include           \
 		 -I$(srctree)/drivers/of/testcase-data                   \
+		 -I$(srctree)/kernel/dts                                 \
 		 -undef -D__DTS__
 
 # Finds the multi-part object the current object will be linked into
@@ -285,7 +286,7 @@ quiet_cmd_dtc = DTC     $@
 cmd_dtc = mkdir -p $(dir ${dtc-tmp}) ; \
 	$(CPP) $(dtc_cpp_flags) -x assembler-with-cpp -o $(dtc-tmp) $< ; \
 	$(objtree)/scripts/dtc/dtc -O dtb -o $@ -b 0 \
-		-i $(dir $<) $(DTC_FLAGS) \
+		-i $(dir $<) -i $(srctree)/kernel/dts $(DTC_FLAGS) \
 		-d $(depfile).dtc.tmp $(dtc-tmp) ; \
 	cat $(depfile).pre.tmp $(depfile).dtc.tmp > $(depfile)
 
-- 
2.1.4