Hi all,
Currently Renesas R-Car Gen2 SoCs use the common clk-rcar-gen2,
clk-mstp, and clk-div6 drivers, which depend on most clocks being
described in DT. Especially the module (MSTP) clocks are cumbersome and
error prone, due to 3 arrays (clocks, clock-indices, and
clock-output-names) to be kept in sync. In addition, the clk-mstp driver
cannot be extended easily to also support module resets, which are
provided by the same hardware module.
Hence when developing support for R-Car Gen3 SoCs, another approach was
chosen, which led to the CPG/MSSR driver core, and SoC-specific
subdrivers (initially for R-Car Gen3, but later also for RZ/G1).
This series introduces new clock drivers for all supported R-Car Gen2
SoCs, using the CPG/MSSR driver core, and the support for RZ/G1. They
provide all clocks supported by the old driver, plus a few more.
The old driver can still be used through a Kconfig option, to preserve
backward compatibility with old DTBs.
This series does not include the corresponding DTS updates. These will
be posted as a separate series later.
Changes compared to v1:
- Add Acked-by, Reviewed-by,
- Add more rationale to the clock driver patch descriptions.
This series depends on "[PATCH v2] clk: renesas: Rework Kconfig and
Makefile logic", which I posted before.
For testing, this patch series, incl. all dependencies and the DTS
updates, are available in the topic/rcar2-cpg-mssr-v2 branch of my
renesas-drivers git repository at
git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git.
This has been tested on r8a7790/lager, r8a7791/koelsch, r8a7792/blanche,
r8a7793/gose, and r8a7794/alt. /sys/kernel/debug/clk/clk_summary has
been compared before and after the conversion.
I plan to queue this up in clk-renesas-for-v4.13, so the DTS updates can
be queued for v4.14 later.
Thanks!
Geert Uytterhoeven (10):
clk: renesas: cpg-mssr: Document R-Car Gen2 support
clk: renesas: Add r8a7790 CPG Core Clock Definitions
clk: renesas: Add r8a7791 CPG Core Clock Definitions
clk: renesas: Add r8a7792 CPG Core Clock Definitions
clk: renesas: Add r8a7793 CPG Core Clock Definitions
clk: renesas: Add r8a7794 CPG Core Clock Definitions
clk: renesas: r8a7790: Add new CPG/MSSR driver
clk: renesas: r8a7791/r8a7793: Add new CPG/MSSR driver
clk: renesas: r8a7792: Add new CPG/MSSR driver
clk: renesas: r8a7794: Add new CPG/MSSR driver
.../devicetree/bindings/clock/renesas,cpg-mssr.txt | 10 +-
drivers/clk/renesas/Kconfig | 22 +-
drivers/clk/renesas/Makefile | 4 +
drivers/clk/renesas/r8a7790-cpg-mssr.c | 278 ++++++++++++++++++++
drivers/clk/renesas/r8a7791-cpg-mssr.c | 286 +++++++++++++++++++++
drivers/clk/renesas/r8a7792-cpg-mssr.c | 221 ++++++++++++++++
drivers/clk/renesas/r8a7794-cpg-mssr.c | 255 ++++++++++++++++++
drivers/clk/renesas/renesas-cpg-mssr.c | 29 +++
drivers/clk/renesas/renesas-cpg-mssr.h | 4 +
include/dt-bindings/clock/r8a7790-cpg-mssr.h | 52 ++++
include/dt-bindings/clock/r8a7791-cpg-mssr.h | 48 ++++
include/dt-bindings/clock/r8a7792-cpg-mssr.h | 43 ++++
include/dt-bindings/clock/r8a7793-cpg-mssr.h | 48 ++++
include/dt-bindings/clock/r8a7794-cpg-mssr.h | 47 ++++
14 files changed, 1341 insertions(+), 6 deletions(-)
create mode 100644 drivers/clk/renesas/r8a7790-cpg-mssr.c
create mode 100644 drivers/clk/renesas/r8a7791-cpg-mssr.c
create mode 100644 drivers/clk/renesas/r8a7792-cpg-mssr.c
create mode 100644 drivers/clk/renesas/r8a7794-cpg-mssr.c
create mode 100644 include/dt-bindings/clock/r8a7790-cpg-mssr.h
create mode 100644 include/dt-bindings/clock/r8a7791-cpg-mssr.h
create mode 100644 include/dt-bindings/clock/r8a7792-cpg-mssr.h
create mode 100644 include/dt-bindings/clock/r8a7793-cpg-mssr.h
create mode 100644 include/dt-bindings/clock/r8a7794-cpg-mssr.h
--
2.7.4
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
