2017-12-26 2:39 GMT+09:00 Krzysztof Kozlowski <krzk@xxxxxxxxxx>: > On Sun, Dec 24, 2017 at 6:19 PM, Masahiro Yamada > <yamada.masahiro@xxxxxxxxxxxxx> wrote: >> 2017-12-22 21:41 GMT+09:00 Krzysztof Kozlowski <krzk@xxxxxxxxxx>: >>> On Mon, Nov 27, 2017 at 3:19 AM, Masahiro Yamada >>> <yamada.masahiro@xxxxxxxxxxxxx> wrote: >>>> ARCH_S3C24XX is a very exceptional platform that some DT files in >>>> arch/arm/boot/dts/, but does not select USE_OF. >>> >>> Not entirely. The platform does select USE_OF - when MACH_S3C2416_DT >>> is chosen. For other boards USE_OF is not necessary because they do >>> not use DT. Why you need to select it for entire arch? >>> >>> Best regards, >>> Krzysztof >>> >> >> >> The reason is simple - to avoid compile error. >> >> >> If I simply drop ifeq ($(CONFIG_OF),y) >> but do not select ARCH_S3C24XX, >> s3c2410_defconfig failed to build. >> >> >> $ make -s ARCH=arm mrproper >> $ make -s ARCH=arm s3c2410_defconfig >> $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- dtbs >> ... >> >> DTC arch/arm/boot/dts/s3c2416-smdk2416.dtb >> /bin/sh: 1: ./scripts/dtc/dtc: not found >> scripts/Makefile.lib:310: recipe for target >> 'arch/arm/boot/dts/s3c2416-smdk2416.dtb' failed >> make[1]: *** [arch/arm/boot/dts/s3c2416-smdk2416.dtb] Error 127 >> arch/arm/Makefile:349: recipe for target 'dtbs' failed >> make: *** [dtbs] Error 2 >> >> >> Another solution would be to enable dtb by CONFIG_MACH_S3C2416_DT. >> >> >> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile >> index d0381e9..950b5dd 100644 >> --- a/arch/arm/boot/dts/Makefile >> +++ b/arch/arm/boot/dts/Makefile >> @@ -800,7 +798,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += \ >> rk3288-veyron-pinky.dtb \ >> rk3288-veyron-speedy.dtb \ >> rk3288-vyasa.dtb >> -dtb-$(CONFIG_ARCH_S3C24XX) += \ >> +dtb-$(CONFIG_MACH_S3C2416_DT) += \ >> s3c2416-smdk2416.dtb >> dtb-$(CONFIG_ARCH_S3C64XX) += \ >> s3c6410-mini6410.dtb \ >> >> >> >> If you migrate S3C24XX platform to DT, >> per-board CONFIG option will go away. >> >> So, I think dtb-$(CONFIG_ARCH_S3C24XX) is OK. > > I think this second solution - using CONFIG_MACH_S3C2416_DT - makes > more sense because: > 1, S3C24xx will not be converted to DT. This is a legacy platform. > 2. DT version supports only part of boards and peripherals so most of > existing platforms will use non-DT boardfiles. Enabling OF on all of > them is not useful for them. I do not care this much. I leave this up to you (and ARM-SOC maintainers). > 3. The same error and solution probably applies to MACH_S3C64XX. Maybe no. Looking at arch/arm/mach-s3c64xx/Kconfig, ARCH_S3C64XX depends on ARCH_MULTI_V6. Multiplatform selects USE_OF. > > Best regards, > Krzysztof > -- > To unsubscribe from this list: send the line "unsubscribe devicetree" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Best Regards Masahiro Yamada -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
