[U-Boot] [PATCH 2/3] bcm2836 SoC support (used in Raspberry Pi 2 model B)

[Masahiro Yamada]

Hi Tom,


On Mon,  9 Feb 2015 23:56:45 -0700
Stephen Warren <swarren at wwwdotorg.org> wrote:

> The bcm2835 and bcm2836 are essentially identical, except:
> - The CPU is an ARM1176 v.s. a quad-core Cortex-A7.
> - The physical address of many IO controllers has moved.
> 
> Rather than introducing a whole new bcm2836 value for $(SOC) or $(ARCH),
> update the existing bcm2835 code to handle the minor differences, and
> plumb it into the ARMv7 CPU architecture.
> 
[ snip ]

> diff --git a/arch/arm/cpu/armv7/bcm2835/Makefile b/arch/arm/cpu/armv7/bcm2835/Makefile
> new file mode 100644
> index 000000000000..ed1ee4753d49
> --- /dev/null
> +++ b/arch/arm/cpu/armv7/bcm2835/Makefile
> @@ -0,0 +1,13 @@
> +#
> +# (C) Copyright 2012 Stephen Warren
> +#
> +# SPDX-License-Identifier:	GPL-2.0+
> +#
> +
> +src_dir := ../../arm1176/bcm2835/
> +
> +obj-y	:=
> +obj-y	+= $(src_dir)/init.o
> +obj-y	+= $(src_dir)/reset.o
> +obj-y	+= $(src_dir)/timer.o
> +obj-y	+= $(src_dir)/mbox.o


Tom,

Here is another proof that the arch/$(ARCH)/cpu/$(CPU)/$(SOC) structure is wrong.
BCM2836 crib most of the source files from BCM2835
but they must be placed separetely because of the difference of the main processor.

Could you tell me your impression about my RFC series?
(Anyway, it is already out-dated.  I can rebase if you like.)

Of course, we can merge  arch/arm/cpu/arm1176/bcm2835 and arch/arm/cpu/armv7/bcm2836
into arch/arm/mach-bcm lator.

What I can tell now is:  more we wait, more work we will have to do.




Best Regards
Masahiro Yamada