[v2,0/4] soc: renesas: Add system controller support for RZ/G3E SoC

Message

John Madieu Jan. 1, 2025, 4:33 p.m. UTC

This patch series adds support for the RZ/G3E system controller and extends
the existing RZ/V2H(P) system controller to support syscon. The RZ/G3E
system controller allows detecting various SoC features like core count,
NPU availability, and CA55 PLL configuration.

Changes in v2:
- Fixed code style issues in rz-sysc.c and r9a09g047-sysc.c
- Fixed device tree documentation, getting rid of syscon compatible string
- Handled non signal-aware readable/writeable regmap callback
- Consolidated common code between RZ/V2H and RZ/G3E drivers
- Moved SoC ID detection from the compatible string fix into a new patch

Key features:
- Syscon support for both RZ/V2H and RZ/G3E system controllers
- Detection of quad/dual core configuration
- Detection of Ethos-U55 NPU presence
- Validation of CA55 PLL frequency setting
- SoC-specific extended identification through callbacks

This patch series depends upon [1], [2], and [3].

Tested:
- Example of SoC detection:
[    0.065608] renesas-rz-sysc 10430000.system-controller: Detected Renesas 
Quad Core RZ/G3E r9a09g047 Rev 0  with Ethos-U55

- Example of PLL misconfiguration warning:
[    0.065616] renesas-rz-sysc 10430000.system-controller: CA55 PLL is not 
set to 1.7GHz

[1] https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=914097
[2] https://patchwork.kernel.org/project/linux-renesas-soc/list/?series=912455
[3] https://lore.kernel.org/lkml/[e-mail]/T/

John Madieu (4):
  dt-bindings: soc: renesas: Add RZ/G3E variant SYS bindings
  soc: renesas: rz-sysc: Fix SoC ID string extraction
  soc: renesas: rz-sysc: Add support for RZ/G3E family
  arm64: dts: renesas: r9a09g047: add sys node

 .../soc/renesas/renesas,r9a09g057-sys.yaml    |  5 +-
 arch/arm64/boot/dts/renesas/r9a09g047.dtsi    |  7 ++
 drivers/soc/renesas/Kconfig                   |  6 ++
 drivers/soc/renesas/Makefile                  |  1 +
 drivers/soc/renesas/r9a09g047-sysc.c          | 73 +++++++++++++++++++
 drivers/soc/renesas/rz-sysc.c                 | 24 +++++-
 drivers/soc/renesas/rz-sysc.h                 |  6 ++
 7 files changed, 118 insertions(+), 4 deletions(-)
 create mode 100644 drivers/soc/renesas/r9a09g047-sysc.c