[00/12] Add support for Renesas RZ/G3E SoC and SMARC-EVK platform

Hi all,

This patch series adds initial support for the Renesas RZ/G3E SoC and
RZ/G3E SMARC EVK platform. The RZ/G3E device is a general-purpose
microprocessor with a quad-core CA-55, single core CM-33, Ethos-U55 NPU
, Mali-G52 3-D Graphics and other peripherals.

Support for below list of blocks added on SoC DTSI (r9a09g047.dtsi):
 - EXT CLKs
 - 4X CA55
 - SCIF
 - CPG
 - GIC
 - ARMv8 Timer

This adds also support for the RZ/G3E SMARC EVK board
(r9a09g047e57-smarc.dts) and enable the following peripheral:
 - SCIF
 
Note:
 This patch series gives a boot console with serial driver support.
Later there is a plan to add support for SoC Identification using
SYSC driver and pin controller support were also added.
 
Test logs:
/ # uname -r
6.12.0-next-20241122-12513-g189628626a52

/ # cat /proc/cpuinfo
processor       : 0
BogoMIPS        : 48.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x2
CPU part        : 0xd05
CPU revision    : 0

processor       : 1
BogoMIPS        : 48.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x2
CPU part        : 0xd05
CPU revision    : 0

processor       : 2
BogoMIPS        : 48.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x2
CPU part        : 0xd05
CPU revision    : 0

processor       : 3
BogoMIPS        : 48.00
Features        : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp
CPU implementer : 0x41
CPU architecture: 8
CPU variant     : 0x2
CPU part        : 0xd05
CPU revision    : 0

/ #

/ # cat /proc/interrupts
           CPU0       CPU1       CPU2       CPU3
 11:        436        539        467        446    GICv3  27 Level     arch_timer
 14:          0          0          0          0    GICv3 561 Level     11c01400.serial:rx err
 15:          0          0          0          0    GICv3 564 Level     11c01400.serial:rx full
 16:        391          0          0          0    GICv3 565 Level     11c01400.serial:tx empty
 17:          0          0          0          0    GICv3 562 Level     11c01400.serial:break
 18:         67          0          0          0    GICv3 566 Level     11c01400.serial:rx ready
 19:          0          0          0          0    GICv3 563 Level     11c01400.serial:tx end
IPI0:         3         12         12         25       Rescheduling interrupts
IPI1:       299        276        347         82       Function call interrupts
IPI2:         0          0          0          0       CPU stop interrupts
IPI3:         0          0          0          0       CPU stop NMIs
IPI4:         0          0          0          0       Timer broadcast interrupts
IPI5:         0          0          0          0       IRQ work interrupts
IPI6:         0          0          0          0       CPU backtrace interrupts
IPI7:         0          0          0          0       KGDB roundup interrupts
Err:          0
/ #

/ # cat /proc/meminfo
MemTotal:        3882652 kB
MemFree:         3846048 kB
MemAvailable:    3775780 kB

Biju Das (12):
  dt-bindings: serial: renesas: Document RZ/G3E (r9a09g047) scif
  dt-bindings: soc: renesas: Document Renesas RZ/G3E SoC variants
  dt-bindings: soc: renesas: Document RZ/G3E SMARC SoM and Carrier-II
    EVK
  dt-bindings: clock: renesas: Document RZ/G3E SoC CPG
  soc: renesas: Add RZ/G3E (R9A09G047) config option
  clk: renesas: Add support for RZ/G3E SoC
  clk: renesas: rzv2h-cpg: Add MSTOP support
  arm64: dts: renesas: Add initial DTSI for RZ/G3E SoC
  arm64: dts: renesas: Add initial support for RZ/G3E SMARC SoM
  arm64: dts: renesas: Add initial device tree for RZ/G3E SMARC EVK
    board
  arm64: defconfig: Enable R9A09G047 SoC
  HACK-DO-NOT-APPLY-defconfig: Enable INIT RAMFS

 .../bindings/clock/renesas,rzv2h-cpg.yaml     |  15 +-
 .../bindings/serial/renesas,scif.yaml         |   5 +
 .../bindings/soc/renesas/renesas.yaml         |  17 +++
 arch/arm64/boot/dts/renesas/Makefile          |   2 +
 arch/arm64/boot/dts/renesas/r9a09g047.dtsi    | 144 ++++++++++++++++++
 arch/arm64/boot/dts/renesas/r9a09g047e37.dtsi |  18 +++
 .../boot/dts/renesas/r9a09g047e57-smarc.dts   |  18 +++
 arch/arm64/boot/dts/renesas/r9a09g047e57.dtsi |  13 ++
 .../boot/dts/renesas/renesas-smarc2.dtsi      |  24 +++
 .../boot/dts/renesas/rzg3e-smarc-som.dtsi     |  28 ++++
 arch/arm64/configs/defconfig                  |   2 +
 drivers/clk/renesas/Kconfig                   |   7 +-
 drivers/clk/renesas/Makefile                  |   1 +
 drivers/clk/renesas/r9a09g047-cpg.c           | 100 ++++++++++++
 drivers/clk/renesas/r9a09g057-cpg.c           | 117 +++++++++-----
 drivers/clk/renesas/rzv2h-cpg.c               |  98 +++++++++++-
 drivers/clk/renesas/rzv2h-cpg.h               |  23 ++-
 drivers/soc/renesas/Kconfig                   |   5 +
 .../dt-bindings/clock/renesas,r9a09g047-cpg.h |  21 +++
 19 files changed, 604 insertions(+), 54 deletions(-)
 create mode 100644 arch/arm64/boot/dts/renesas/r9a09g047.dtsi
 create mode 100644 arch/arm64/boot/dts/renesas/r9a09g047e37.dtsi
 create mode 100644 arch/arm64/boot/dts/renesas/r9a09g047e57-smarc.dts
 create mode 100644 arch/arm64/boot/dts/renesas/r9a09g047e57.dtsi
 create mode 100644 arch/arm64/boot/dts/renesas/renesas-smarc2.dtsi
 create mode 100644 arch/arm64/boot/dts/renesas/rzg3e-smarc-som.dtsi
 create mode 100644 drivers/clk/renesas/r9a09g047-cpg.c
 create mode 100644 include/dt-bindings/clock/renesas,r9a09g047-cpg.h