[PATCH v6 00/11] soc: renesas: Add R-Car SYSC PM Domain Support

[Geert Uytterhoeven <geert+renesas@glider.be>]

	Hi Simon, Magnus,

This patch series introduces a DT-based driver for the R-Car System
Controller, as found on Renesas R-Car H1, R-Car Gen2, and R-Car Gen3
SoCs.

This is a dependency for the enablement of DU and VSP on R-Car H3, as
the VSPs are located in a PM Domain.

Changes compared to v5:
  - Add Reviewed-by,
  - Drop unneeded genpd->dev_ops.active_wakeup callback,
  - Move call to pm_genpd_init() after all local initialization,

Changes compared to v4:
  - Add Reviewed-by,
  - Mask SYSC interrupts sources before enabling them (doesn't matter
    much as they're disabled at the GIC level anyway),
  - Reference r8a7791_sysc_info directly for R-Car M2-N in rcar-sysc.c,
  - Re-add explicit "always-on" power area instead of aliasing the SoC's
    Clock Domain,
  - Add "always-on" power area on R-Car H1 and Gen2 SoCs,
  - Merge the two initialization phases again,
  - Use either the cpg_mssr_*() or cpg_mstp_*() callbacks for Clock
    Domain control,
  - Drop dependency on r8a7795 of the Clock Domain handling, as this is
    used for the "always-on" PM Domain on R-Car H1 and Gen2, too,

Changes compared to v3:
  - Add Reviewed-by,
  - Make sure not to clear reserved SYSCIMR bits that were set before,
  - Make the always-on power area implicit and always present, and an
    alias of the existing SoC's Clock Domain. This makes the number of
    power areas a compile-time constant, and allows to drop PD_ALWAYS_ON
    and some checks.
  - Split initialization in two phases,
  - Remove the explicit dependency on the CPG/MSSR driver by forwarding
    the attach/detach callbacks to the parent PM Domain.
    If deemed reusable, rcar_sysc_{at,de}tach_dev() can be moved to
    common genpd code later.
  - Document that ARM cores are controlled by PSCI on R-Car Gen3
    (although the underlying CPG/APMU hardware is the same as on Gen2),
  - Drop R8A7779_PD_SH, as it's not documented in the datasheet,
  - Rename R8A779*_PD_SH to R8A779*_PD_SH_4A, and "sh" to "sh-4a" on
    R-Car Gen2,
  - Remove always-on power area from the R-Car Gen3 table, as it's now
    implicitly handled by the rcar-sysc driver,
  - Reformat tables,
  - Minor improvements (double evaluation, unused parameter, debug
    message consolidation),
  - Update MAINTAINERS.

Changes compared to v2:
  - Add Reviewed-by,
  - Rename driver from pm-rcar to rcar-sysc,
  - Create PM Domains from hierarchy in C data instead of DT,
  - Add support for an "always-on" domain, which is currently used on
    R-Car H3 only (support can be added for other R-Car SoCs, preferably
    after their migration to CPG/MSSR),
  - Drop power area A3SH on R-Car H3, as it's no longer
    documented in the datasheet, and touching it seems to crash SYSC,
  - Hook up the CPG/MSSR Clock Domain attach/detach callbacks instead of
    using our own copies,
  - Initialize SYSCIER early, as SYSC needs the interrupt sources to be
    enabled to control power,
  - Mask all SYSC interrupt sources for the CPU,
  - Drop check for CONFIG_PM_GENERIC_DOMAINS, which is now always
    enabled on R-Car SoCs,
  - Use early_initcall() instead of core_initcall(),
  - Do not power up CPU power areas during initialization, as this is
    handled later (directly or indirectly) by the SMP code,
  - Extract bindings into its own series, "[PATCH v3 0/7] PM / Domains:
    Add DT bindings for the R-Car System Controller".

Changes compared to v1 (more details in the individual patches):
  - Moved pm-rcar from arch/arm/mach-shmobile/ to drivers/soc/renesas/,
  - Added R-Car H3 (r8a7795) support, incl. support for devices part of
    a SYSC PM domain and the CPG/MSSR clock domain,
  - Use "renesas,<type>-sysc" instead of "renesas,sysc-<type>",
  - Added fallback compatibility strings for R-Car Gen2 and Gen3.
  - Changed one-line summary prefix to match current arm-soc practices,
  - The L2 cache-controller patches have been extracted into a separate
    series ("[PATCH v3 0/7] ARM/arm64: dts: renesas: Add/complete L2
    cache-controller nodes"),
  - Minor fixes.

Dependencies:
  - clk-renesas-for-v4.7 (which now includes "[PATCH v2 0/4] clk:
    renesas: R-Car SYSC PM Domain Preparation"; pull request sent),
  - renesas-devel-20160420-v4.6-rc4 (which already contains series
    "[PATCH v5 0/7] PM / Domains: Add DT bindings for the R-Car System
    Controller").

I won't be resending follow-up series "[PATCH v5 00/12] ARM/arm64: dts:
rcar: Add SYSC PM domains" for now, as it's unchanged, except for an
ugly rebase due to dropping the commits to reference both DMA
controllers on R-Car Gen2.

For your convenience, I've pushed this, incl. all dependencies, to the
topic/rcar-sysc-pd-v6 branch of
git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git.
Integration with renesas-drivers-2016-04-12-v4.6-rc3 is available in the
topic/gen3-latest branch.

This has been tested on r8a7779/marzen, r8a7790/lager, r8a7791/koelsch,
r8a7794/alt, and r8a7795/salvator-x.

Thanks!

Geert Uytterhoeven (11):
  soc: renesas: Move pm-rcar to drivers/soc/renesas/rcar-sysc
  soc: renesas: rcar-sysc: Improve rcar_sysc_power() debug info
  soc: renesas: rcar-sysc: Add DT support for SYSC PM domains
  soc: renesas: rcar-sysc: Make rcar_sysc_power_is_off() static
  soc: renesas: rcar-sysc: Enable Clock Domain for I/O devices
  soc: renesas: rcar-sysc: Add support for R-Car H1 power areas
  soc: renesas: rcar-sysc: Add support for R-Car H2 power areas
  soc: renesas: rcar-sysc: Add support for R-Car M2-W power areas
  soc: renesas: rcar-sysc: Add support for R-Car M2-N power areas
  soc: renesas: rcar-sysc: Add support for R-Car E2 power areas
  soc: renesas: rcar-sysc: Add support for R-Car H3 power areas

 MAINTAINERS                                        |   4 +
 arch/arm/mach-shmobile/Kconfig                     |  11 +-
 arch/arm/mach-shmobile/Makefile                    |   1 -
 arch/arm/mach-shmobile/pm-r8a7779.c                |   3 +-
 arch/arm/mach-shmobile/pm-rcar-gen2.c              |   2 +-
 arch/arm/mach-shmobile/pm-rcar.c                   | 164 ---------
 arch/arm/mach-shmobile/smp-r8a7779.c               |   2 +-
 arch/arm/mach-shmobile/smp-r8a7790.c               |   2 +-
 drivers/soc/Makefile                               |   3 +-
 drivers/soc/renesas/Makefile                       |   7 +
 drivers/soc/renesas/r8a7779-sysc.c                 |  34 ++
 drivers/soc/renesas/r8a7790-sysc.c                 |  48 +++
 drivers/soc/renesas/r8a7791-sysc.c                 |  33 ++
 drivers/soc/renesas/r8a7794-sysc.c                 |  33 ++
 drivers/soc/renesas/r8a7795-sysc.c                 |  56 +++
 drivers/soc/renesas/rcar-sysc.c                    | 401 +++++++++++++++++++++
 drivers/soc/renesas/rcar-sysc.h                    |  58 +++
 .../linux/soc/renesas/rcar-sysc.h                  |   9 +-
 18 files changed, 690 insertions(+), 181 deletions(-)
 delete mode 100644 arch/arm/mach-shmobile/pm-rcar.c
 create mode 100644 drivers/soc/renesas/Makefile
 create mode 100644 drivers/soc/renesas/r8a7779-sysc.c
 create mode 100644 drivers/soc/renesas/r8a7790-sysc.c
 create mode 100644 drivers/soc/renesas/r8a7791-sysc.c
 create mode 100644 drivers/soc/renesas/r8a7794-sysc.c
 create mode 100644 drivers/soc/renesas/r8a7795-sysc.c
 create mode 100644 drivers/soc/renesas/rcar-sysc.c
 create mode 100644 drivers/soc/renesas/rcar-sysc.h
 rename arch/arm/mach-shmobile/pm-rcar.h => include/linux/soc/renesas/rcar-sysc.h (60%)

-- 
1.9.1

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@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