On Wed, 2017-02-01 at 13:20 +0100, Gerd Hoffmann wrote:

quoted

quoted

I think just having links from
arch/arm64/boot/dts/broadcom/bcm2837*.dts* to arch/arm/boot/dts/
would
be the solution, then this Makefile could just reference
bcm2837-rpi-3-b.dtb.

I suspect it is not that easy, last time I tried it didn't work.
Will try again though.

Yep, dtbs_install fails:

[ ... ]
? INSTALL arch/arm/boot/dts/bcm2835-rpi-b-plus.dtb
? INSTALL arch/arm/boot/dts/bcm2835-rpi-a-plus.dtb
? INSTALL arch/arm/boot/dts/bcm2836-rpi-2-b.dtb
? INSTALL?
cp: missing destination file operand after '/boot/dtbs/4.10.0-rc5+'
Try 'cp --help' for more information.
/root/linux/scripts/Makefile.dtbinst:41: recipe for target
'bcm2837-rpi-3-b.dts' failed
make[3]: *** [bcm2837-rpi-3-b.dts] Error 1
arch/arm/Makefile:348: recipe for target 'dtbs_install' failed
make[2]: *** [dtbs_install] Error 2
Makefile:150: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
Makefile:24: recipe for target '__sub-make' failed

This is actually a problem I had to deal with way in the begging of
ARM64.  What was done in the github tree was to have the one of the DTS
 files(in this case 64) #include the 32 bit dts.  That way it's not
needed to have the symbolic link and install should work.

I know it's ulgy, but it works...

Take a look at:
https://github.com/raspberrypi/linux/blob/rpi-4.10.y/arch/arm64/boot/dt
s/broadcom/bcm2710-rpi-3-b.dts

Here is what the file contains:
#define RPI364

#include "../../../../arm/boot/dts/bcm2710-rpi-3-b.dts"