[PATCH v2 0/3] Add STM32 TAMP nvram driver support

Propose bindings and driver to enable TAMP nvram driver
support for STM32MP SoC's family.
It allows to expose TAMP backup registers as nvmem cells.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
---
Changes in v2:
- Update commit title of nvmem dt-bindings's patch.
- Add required compatible for patternProperties in stm32/st,stm32-syscon.yaml.
- Fix issue found by sashiko-bot:
  - Add freeing compartment_owner.
  - Replace regmap_read/regmap_write by regmap_update_bits in stm32_tamp_nvram_write_byte().
  - Update error return in stm32_tamp_nvram_read_byte(), stm32_tamp_nvram_write_byte(),
    stm32_tamp_nvram_read() and stm32_tamp_nvram_write() to return the actual regmap_read() /
    regmap_write() error instead of -EIO.
 - Add freeing field and update error return values for stm32_tamp_nvram_get_backup_zones().
 - Update error return for stm32_tamp_nvram_probe().
- Link to v1: https://patch.msgid.link/20260910-upstream_nvram_reworked-v1-0-521c16175cef@foss.st.com

To: Simeon Marijon <redacted>
To: Patrice Chotard <patrice.chotard@foss.st.com>
To: Srinivas Kandagatla <srini@kernel.org>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Maxime Coquelin <mcoquelin.stm32@gmail.com>
To: Alexandre Torgue <alexandre.torgue@foss.st.com>
To: Christophe Roullier <redacted>
Cc: linux-stm32@st-md-mailman.stormreply.com
Cc: devicetree@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org

---
Patrice Chotard (1):
      dt-bindings: arm: stm32: allow TAMP nvram child node for syscon

Simeon Marijon (2):
      dt-bindings: nvmem: add STM32MPX TAMP backup registers
      nvmem: stm32: add TAMP nvmem driver

 .../bindings/arm/stm32/st,stm32-syscon.yaml        |  30 +
 .../bindings/nvmem/st,stm32-tamp-nvram.yaml        |  57 ++
 MAINTAINERS                                        |   8 +
 drivers/nvmem/Kconfig                              |  10 +
 drivers/nvmem/Makefile                             |   2 +
 drivers/nvmem/stm32-tamp-nvram.c                   | 742 +++++++++++++++++++++
 6 files changed, 849 insertions(+)
---
base-commit: cee9395acd8043be0644b25c34bfa86623f2b935
change-id: 20260909-upstream_nvram_reworked-f84a4b37817c

Best regards,
--  
Patrice Chotard [off-list ref]