[PATCH v4 0/4] soc: ti: Add TDA54 SCM configuration syscon support

[Moteen Shah <m-shah@ti.com>]

This series adds support for the TDA54 SCM configuration region in the MCU
domain. The region is shared by several peripherals, so it is exposed as a
syscon regmap for other drivers to look up by phandle.

Patch 1 adds the device tree binding for ti,tda54-mcu-scm-conf.

Patch 2 converts the SoC attributes, revision string, and registered SoC device
in k3-socinfo to device-managed cleanup.

Patch 3 splits the SoC decode and registration logic out of
k3_chipinfo_probe() into k3_socinfo_register() and exports it, so drivers that
read the JTAG ID through another access path can reuse the common K3 SoC
identification logic. It adds the public header declaring the helper.

Patch 4 adds the TDA54 SCM configuration driver. It provides proxy-aware
register access with SCM unlock and claim handling, publishes the regmap
through syscon, and registers TDA54 SoC information through the helper from
patch 3. The option defaults to m on ARCH_K3.

Changelog:

Changes since v3:
Link to v3: https://lore.kernel.org/all/20261112081047.1550471-1-m-shah@ti.com/
- Add the missing k3-socinfo public header to the helper patch.

Changes since v2:
Link to v2: https://lore.kernel.org/all/20261027083700.1964371-1-m-shah@ti.com/
- Split the k3-socinfo device-managed cleanup changes from the exported SoC
  registration helper into separate patches.

Changes in v1:
Link to v1: https://lore.kernel.org/all/20261019080736.944127-1-m-shah@ti.com/
- No changes to the device tree binding patch.
- Use devm-managed allocation for the SoC attributes and revision string in
  k3-socinfo, and simplify the cleanup of the registered SoC device.
- Enable fast_io for the TDA54 SCM configuration regmap.

Moteen Shah (4):
  dt-bindings: soc: ti: Document the ti,tda54-mcu-scm-conf
  soc: ti: k3-socinfo: Use device managed allocations and unregistration
  soc: ti: k3-socinfo: Export SoC registration helper
  soc: ti: Add TDA54 SCM configuration syscon support

 .../soc/ti/ti,tda54-mcu-scm-conf.yaml         |  78 +++++++
 drivers/soc/ti/Kconfig                        |  16 ++
 drivers/soc/ti/Makefile                       |   1 +
 drivers/soc/ti/k3-socinfo.c                   | 111 +++++----
 drivers/soc/ti/tda54-mcu-sysconf.c            | 217 ++++++++++++++++++
 include/linux/soc/ti/k3-socinfo.h             |  11 +
 6 files changed, 391 insertions(+), 43 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/soc/ti/ti,tda54-mcu-scm-conf.yaml
 create mode 100644 drivers/soc/ti/tda54-mcu-sysconf.c
 create mode 100644 include/linux/soc/ti/k3-socinfo.h

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2.34.1