[U-Boot] Riscv: CONFIG_DEFAULT_DEVICE_TREE failures

[Tom Rini]

On Fri, Mar 29, 2019 at 11:15:48PM -0700, Troy Benjegerdes wrote:

> I attempted to merge in the latest master branch into
> https://github.com/sifive/u-boot/tree/sandbox and I got
> the following error, which seems somewhat broken..
> 
> 
> Device Tree Source is not correctly specified.
> Please define 'CONFIG_DEFAULT_DEVICE_TREE'
> or build with 'DEVICE_TREE=<device_tree>' argument
> 
> dts/Makefile:28: recipe for target 'arch/riscv/dts/fu540.dtb' failed
> 
> 
> Does anyone have any idea what would have caused that?
> 
> Also any feedback or pointers on why the serial_sifive.c 
> driver with CONFIG_DM_SERIAL would not work, but serial_hifive.c
> without CONFIG_DM_SERIAL does seem to work might be appreciated.

You'll need to do something like

commit 89c2b5c02049aea746b1edee0b4e1d8519dec2f4
Author: Masahiro Yamada <yamada.masahiro at socionext.com>
Date:   Thu Mar 14 14:58:33 2019 +0900

    ARM: fix arch/arm/dts/Makefile
    
    Since commit 27cb7300ffda ("Ensure device tree DTS is compiled"),
    build succeeds irrespective of the correctness of Makefile.
    
    In fact, you can compile any defconfig without adding any entry in
    arch/*/dts/Makefile.
    
    As a result, a lot of wrong code have been merged unnoticed.
    
    I am going to revert that commit, and lots of hidden issues have
    come to light:
    
    [1] Typos
    
      armada-3720-uDPU.dts, sun8i-a83t-tbs-a711.dts
    
      use the extension ".dts" instead of ".dtb"
    
    [2] DTB is associated to undefined CONFIG option
    
      For example, mx6sllevk_defconfig defines CONFIG_MX6SLL, but
      associates its device tree to CONFIG_MX6SL, which is undefined.
    
    [3] Lots of entries are missing
    
    Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
    Reviewed-by: Chris Packham <judge.packham at gmail.com>
    [trini: add imx6ul pico dtbs]
    Signed-off-by: Tom Rini <trini at konsulko.com>

But to arch/riscv/dts/Makefile

-- 
Tom
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