Hi, On 09/09/2014 12:44 PM, Akshay Saraswat wrote: > Hi Masahiro, > >> Hi Samsung developers, >> Simon Glass, >> >> >> 2014-09-09 1:10 GMT+09:00 Masahiro YAMADA : >>> Hi Stephen, >>> >>> >>> 2014-09-09 0:58 GMT+09:00 Stephen Warren : >>>> On 09/08/2014 09:57 AM, Masahiro YAMADA wrote: >>>>> >>>>> Hi Stephen, >>>>> >>>>> >>>>> >>>>> 2014-09-09 0:04 GMT+09:00 Stephen Warren : >>>>> >>>>>> I don't believe this is the correct approach; CONFIG_OF_CONTROL isn't a >>>>>> user-configurable option, and hence shouldn't show up in *_defconfig. >>>>>> "select OF_CONTROL" in a Kconfig file probably makes sense though. >>>>> >>>>> >>>>> >>>>> I think it depends on the board (SoC). >>>>> >>>>> In my understanding, Zynq boards should work with/without Device Tree >>>>> control. >>>>> (Moreover, Zynq boards work with/without SPL) >>>>> >>>>> At least as for Zynq, >>>>> CONFIG_OF_CONTROL ( and CONFIG_SPL too) is a user-configurable option. >>>>> >>>>> (Michal, please correct me if I am wrong.) >>>>> >>>>> >>>>> I am not familiar with Tegra SoCs, but >>>>> do Tegra boards always Device Tree? ( and only work with SPL ?) >>>>> >>>>> If so, >>>>> >>>>> config TEGRA >>>>> select SPL >>>>> select OF_CONTROL >>>>> >>>>> looks better? >>>> >>>> >>>> That looks correct for Tegra. >>>> >>> >>> OK. I will send v2. >>> CONFIG_OF_CONTROL in tegra defconfigs will go away. >>> >>> >>> (BTW, I forgot to mention a famous board; beaglebone black. >>> >>> am335_boneblack_defconfig disables CONFIG_OF_CONTROL, >>> whereas am335_boneblack_vboot_defconfig enables it. ) >>> >> >> Before posting v2 of this series, >> please let me ask the same question on Exynos and Sandbox >> >> >> Do Exynos boards always need Device Tree to run U-Boot? >> (that is, CONFIG_OF_CONTROL must be "select"ed.) >> > > Yes, all Exynos5 boards need Device Tree to run U-Boot. > In case of Snow and Pit, we use U-Boot's DTB to extract corresponding Kernel > DTB. > Also, we do check (#ifdef) CONFIG_OF_CONTROL to enable some features and IPs. > I am not sure about Exynos4 but I can see CONFIG_OF_LIBFDT in their config > files.
I knew Exynos4/5 are supported the Device-tree, but older Samsung SoCs isn't supported it. Best Regards, Jaehoon Chung > >> or >> >> Do they work with/without Device Tree? >> (that is, users can enable/disable via "make menuconfig" or friends.) >> >> >> What about Sandbox? >> >> >> >> >> Best Regards >> Masahiro Yamada > > Regards, > Akshay Saraswat > _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
