[PATCH 0/2] ARM: renesas: Enable SMP on R-Car E2

[Geert Uytterhoeven]

	Hi Magnus, Mar[ck], Sergei, Simon,

This patch series enables SMP on R-Car E2 (r8a7794).

  - The first patch initializes CNTVOFF for secondary CPU cores, like is
    already done for the boot CPU core.  Without this, the ARM arch
    timer doesn't work on secondary CPU cores.
  - The second patch adds the required infrastructure (APMU device node
    and corresponding enable-method) to DT.
    This must not be applied on a branch that doesn't have the first
    patch!

According to the original comments, the CNTVOFF initialization is needed
on Cortex-A7 only, hence affects R-Car E2, which has a dual Cortex-A7
cluster.
Apparently it's not needed on other R-Car Gen2 members that have (only)
Cortex-A15 clusters.
Perhaps it's also needed on R-Car H2, which has a big.LITTLE
quad Cortex-A15 + quad Cortex-A7 configuration, when running Linux on
the Cortex-A7 cores?  How can I test that?

Thanks for your comments!

Geert Uytterhoeven (1):
  ARM: shmobile: Add CA7 arch_timer initialization for secondary CPUs

Sergei Shtylyov (1):
  ARM: dts: r8a7794: Add SMP support

 arch/arm/boot/dts/r8a7794.dtsi        |  7 +++++++
 arch/arm/mach-shmobile/Makefile       |  1 +
 arch/arm/mach-shmobile/common.h       |  1 +
 arch/arm/mach-shmobile/headsmp-apmu.S | 38 +++++++++++++++++++++++++++++++++++
 arch/arm/mach-shmobile/platsmp-apmu.c |  2 +-
 5 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/mach-shmobile/headsmp-apmu.S

-- 
2.7.4

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds