On 02/12/2013 03:41 AM, Thierry Reding wrote: ...
So it turned out that I need to touch U-Boot anyway, so I decided to give this a spin. I noticed that overriding CONFIG_ARCH_DEVICE_TREE from the board configuration file doesn't work currently. What happens is that the autoconf.mk (which is derived from the board configuration) is included before the CPU config.mk which sets CONFIG_ARCH_DEVICE_TREE to tegra20 (or tegra30, tegra114). I came up with the attached patch to set the variable if not set previously (by the board configuration file).
Feel free to squash that in your patch series if you deem it a proper solution. I can also provide a proper separate patch if you prefer.
diff --git a/arch/arm/cpu/armv7/tegra114/config.mk b/arch/arm/cpu/armv7/tegra114/config.mk
-CONFIG_ARCH_DEVICE_TREE := tegra114 +CONFIG_ARCH_DEVICE_TREE ?= tegra114
That looks very odd. What value is CONFIG_ARCH_DEVICE_TREE before that assignment, and why exactly is it wrong?