Hi all,
The Renesas R-Car System Controller, as found in various Renesas R-Car
SoCs, provides power management for the CPU cores and various
coprocessors.
This RFC patch series adds DT support for the R-Car SYSC, using the
generic PM Domain. It supports R-Car H1, R-Car Gen2, and R-Car H3.
Patches:
- Patch 1 adds the DT binding documentation (alternatives I considered
below the "---"-line),
- Patch 2 moves the existing pm-rcar driver to drivers/soc/renesas, so
it can be shared by arm32 and arm64,
- Patches 3-5 contain the driver implementation,
- Patches 6-11 add the SYSC PM domains themselves to the various dtsi
files.
Known issues:
- This needs better integration with the PM code in pm-rcar-gen2, the
SMP code in smp-r8a7790, and Magnus' DT APMU series,
- CPG/MSSR clock domain handling should share more code with the
renesas-cpg-mssr driver.
Changes compared to v2 (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.
This series is against renesas-devel-20160215-v4.5-rc4, with series
"[PATCH v3 0/7] ARM/arm64: dts: renesas: Add/complete L2
cache-controller nodes" applied. It is not yet meant to be applied!
It's published as-is to ease development of drivers for devices residing
in a SYSC PM domain on R-Car H3 (e.g. VSP, FCP_V).
This was tested on r8a7779/marzen, r8a7791/koelsch, r8a7794/alt, and
r8a7795/salvator-x.
For your convenience, I've also pushed this series to
git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git#topic/rcar-sysc-pd-rfc-v2
Thanks for your comments!
Geert Uytterhoeven (11):
PM / Domains: Add DT bindings for the R-Car System Controller
soc: renesas: Move pm-rcar to drivers/soc/renesas/
soc: renesas: Improve rcar_sysc_power() debug info
soc: renesas: rcar: Add DT support for SYSC PM domains
soc: renesas: rcar: Handle clock domain devices in SYSC PM domains
ARM: dts: r8a7779: Add SYSC PM domains
ARM: dts: r8a7790: Add SYSC PM domains
ARM: dts: r8a7791: Add SYSC PM domains
ARM: dts: r8a7793: Add SYSC PM domains
ARM: dts: r8a7794: Add SYSC PM domains
arm64: dts: r8a7795: Add SYSC PM domains
.../bindings/power/renesas,sysc-rcar.txt | 87 ++++
arch/arm/boot/dts/r8a7779.dtsi | 48 ++
arch/arm/boot/dts/r8a7790.dtsi | 89 ++++
arch/arm/boot/dts/r8a7791.dtsi | 40 ++
arch/arm/boot/dts/r8a7793.dtsi | 39 ++
arch/arm/boot/dts/r8a7794.dtsi | 40 ++
arch/arm/mach-shmobile/Kconfig | 8 +-
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 +-
arch/arm64/boot/dts/renesas/r8a7795.dtsi | 142 ++++++
drivers/soc/Kconfig | 1 +
drivers/soc/Makefile | 3 +-
drivers/soc/renesas/Kconfig | 8 +
drivers/soc/renesas/Makefile | 1 +
drivers/soc/renesas/pm-rcar.c | 559 +++++++++++++++++++++
.../linux/soc/renesas}/pm-rcar.h | 2 +
20 files changed, 1065 insertions(+), 176 deletions(-)
create mode 100644 Documentation/devicetree/bindings/power/renesas,sysc-rcar.txt
delete mode 100644 arch/arm/mach-shmobile/pm-rcar.c
create mode 100644 drivers/soc/renesas/Kconfig
create mode 100644 drivers/soc/renesas/Makefile
create mode 100644 drivers/soc/renesas/pm-rcar.c
rename {arch/arm/mach-shmobile => include/linux/soc/renesas}/pm-rcar.h (93%)
--
1.9.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
