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Message-ID: <51079C05.7040308@synopsys.com> Date: Tue, 29 Jan 2013 15:23:09 +0530 From: Vineet Gupta <Vineet.Gupta1@...opsys.com> To: James Hogan <james.hogan@...tec.com> CC: <linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <arnd@...db.de>, Grant Likely <grant.likely@...retlab.ca>, <devicetree-discuss@...ts.ozlabs.org>, Rob Herring <rob.herring@...xeda.com> Subject: Re: [PATCH v3 32/71] ARC: [DeviceTree] Basic support Hi James, On Monday 28 January 2013 03:51 PM, James Hogan wrote: > Hi Vineet, > > On 24/01/13 10:50, Vineet Gupta wrote: >> diff --git a/arch/arc/Makefile b/arch/arc/Makefile >> index 4d52a3b..90570f9 100644 >> --- a/arch/arc/Makefile >> +++ b/arch/arc/Makefile >> @@ -83,6 +83,9 @@ head-y := arch/arc/kernel/head.o >> # See arch/arc/Kbuild for content of core part of the kernel >> core-y += arch/arc/ >> >> +# w/o this dtb won't embed into kernel binary >> +core-y += arch/arc/boot/dts/ >> + >> # w/o this ifneq, make ARCH=arc clean was crapping out >> ifneq ($(platform-y),) >> core-y += arch/arc/plat-$(PLATFORM)/ >> @@ -101,6 +104,12 @@ bootpImage: vmlinux >> uImage: vmlinux >> $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ >> >> +%.dtb %.dtb.S %.dtb.o: >> + $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ > > arm64 also depends on scripts here, presumably for a reason. I've copied > this in metag too. It probably has to do with forcing rebuild of DTs, in case scripts/dtc/dtc changes. I'll add that as well. >> + >> +dtbs: >> + $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@ > > arm64 does this like below which I think is slightly nicer than how > metag did it: > > dtbs: scripts > $(Q)$(MAKE) $(build)=$(boot)/dts dtbs OK ! >> + >> archclean: >> $(Q)$(MAKE) $(clean)=$(boot) >> >> diff --git a/arch/arc/boot/dts/Makefile b/arch/arc/boot/dts/Makefile >> new file mode 100644 >> index 0000000..4a972a3 >> --- /dev/null >> +++ b/arch/arc/boot/dts/Makefile >> @@ -0,0 +1,14 @@ >> +ifeq ($(CONFIG_OF),y) >> + >> +# Built-in dtb >> +builtindtb-y := skeleton >> + >> +ifneq ($(CONFIG_ARC_BUILTIN_DTB_NAME),"") >> + builtindtb-y := $(CONFIG_ARC_BUILTIN_DTB_NAME) >> +endif >> + >> +obj-y += $(patsubst "%",%,$(builtindtb-y)).dtb.o >> + >> +clean-files := *.dtb > > You don't seem to have a rule for dtbs, but still redirect it in the > main Makefile. I suppose dtbs may want adding to your archhelp if you > use it. The dtbs rule doesn't seem to be working for me here. I'll need to investigate a bit. > > arm64 also adds dtbs and $(dtb-y) to targets (at least in linux-next). I > think this makes sure that they don't get rebuilt unless they've > actually changed. I've also copied this for metag. Did you verify that it makes a difference - at least at my end it's not - the default dtb is getting rebuilt everytime. I need to debug this some more. >> --- a/arch/arc/kernel/Makefile >> +++ b/arch/arc/kernel/Makefile >> @@ -8,6 +8,8 @@ >> obj-y := arcksyms.o setup.o irq.o time.o reset.o ptrace.o entry.o process.o >> obj-y += signal.o traps.o sys.o troubleshoot.o stacktrace.o clk.o >> >> +obj-$(CONFIG_OF) += devtree.o >> + > > You always select CONFIG_OF, so this could be obj-y. I'm not sure this > particularly matters though. Right, for consistency we might add this unconditionally. Thanks for your review -Vineet -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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