[PATCH 09/32] bcm2837-rpi-3-b.dts for 32bit arm

On Do, 2016-06-02 at 00:39 +0200, Arnd Bergmann wrote:

On Wednesday, June 1, 2016 3:30:35 PM CEST Eric Anholt wrote:

quoted

Arnd Bergmann [off-list ref] writes:

quoted

On Wednesday, June 1, 2016 11:43:18 PM CEST Gerd Hoffmann wrote:

quoted

diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
new file mode 100644
index 0000000..36178a6
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts

@@ -0,0 +1 @@
+#include "../../../arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts"

-- 
1.8.3.1

What does this gain you?

Many Raspberry Pi users use a small set of SD cards that they swap
between various versions of the hardware.  It would be good to have
their 32-bit OS images work on the Pi3 as well.

Sure, but you already have the dts file in the other directory,
and the dtb is the same.

According to the comment in the other patch, the idea was to have
the file in the arm64 directory because it's a 64-bit platform,
but now you have it here as well.

Well, it just includes the arm64 version as-is, so we don't have
duplication.  I'm open to suggestions to how handle this better.  

Symbolic link?

Reference to ../../../arm64/boot/dts/broadcom/bcm2837-rpi-3-b.dts
directly in the Makefile?

I've seen arch/arm/boot/dts/Makefile uses globs on *.dts, so I suspect
the later wouldn't be that straight forward.

cheers,
  Gerd