[PATCH] powerpc/85xx: remove P1020RDB and P2020RDB CAMP device trees

[Kumar Gala]

On Jul 13, 2012, at 5:40 PM, Timur Tabi wrote:

> We only need two examples of CAMP device trees in the upstream kernel.
> 
> Co-operative Asymmetric Multi-Processing (CAMP) is a technique where two
> or more operating systems (typically multiple copies of the same Linux kernel)
> are loaded into memory, and each kernel is given a subset of the available
> cores to execute on.  For example, on a four-core system, one kernel runs on
> cores 0 and 1, and the other runs on cores 2 and 3.
> 
> The devices are also partitioned among the operating systems, and this is
> done with customized device trees.  Each kernel gets its own device tree
> that has only the devices that it should know about.
> 
> Unfortunately, this approach is very hackish.  The kernels are trusted to
> only access devices in their respective device trees, and the partitioning
> only works for devices that can be handled.  Crafting the device trees is a
> tricky process, and getting U-Boot to load and start all kernels is cumbersome.
> 
> But most importantly, each CAMP setup is very application-specific, since
> the actual partitioning of resources is done in the DTS by the system
> designer.  Therefore, it doesn't make a lot of sense to have a lot of CAMP
> device trees, since we only expect them to be used as examples.
> 
> Signed-off-by: Timur Tabi <timur at freescale.com>
> ---
> arch/powerpc/boot/dts/p1020rdb_camp_core0.dts |   63 -----------
> arch/powerpc/boot/dts/p1020rdb_camp_core1.dts |  141 -------------------------
> arch/powerpc/boot/dts/p2020rdb_camp_core0.dts |   67 ------------
> arch/powerpc/boot/dts/p2020rdb_camp_core1.dts |  125 ----------------------
> 4 files changed, 0 insertions(+), 396 deletions(-)
> delete mode 100644 arch/powerpc/boot/dts/p1020rdb_camp_core0.dts
> delete mode 100644 arch/powerpc/boot/dts/p1020rdb_camp_core1.dts
> delete mode 100644 arch/powerpc/boot/dts/p2020rdb_camp_core0.dts
> delete mode 100644 arch/powerpc/boot/dts/p2020rdb_camp_core1.dts

applied to next

- k