[Linux-stm32] [PATCH v4 0/3] Add STM32 TAMP nvram driver support

[Patrice CHOTARD]

Don't take care of this series, a new one is on-going which will include https://patchwork.kernel.org/series/1176665/

On 11/4/26 16:20, Patrice Chotard wrote:
> 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 at foss.st.com>
> ---
> Changes in v4:
> - Make usage of of_device_get_match_data() wrapper.
> - Rework ioremap of syscon's memory region to avoid overlapping 
>   between parent and child node. This allows to remove 
>   bkpregs_regmap_cfg declaration for both STM32MP1 and STM32MP2.
> _ Add select MFD_SYSCON in Kconfig.
> - Link to v3: https://patch.msgid.link/20261016-upstream_nvram_reworked-v3-0-f65908490cf7@foss.st.com
> 
> Changes in v3:
> - Fix issue found by sashiko-bot:
>   - rely on the already resolved priv->data->nb_zones instead of 
>     of_device_is_compatible() to set priv->bkpreg_access
>   - Fix max_register of stm32mp1_tamp_nvram_regmap_cfg and 
>     stm32mp2_tamp_nvram_regmap_cfg
>   - Update zones_end type to int*
>   - Replace both memcpy by put_unaligned_le32 and get_unaligned_le32
>   - Link to v2: https://patch.msgid.link/20260930-upstream_nvram_reworked-v2-0-cfda749ee0b7@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 <simeon.marijon at foss.st.com>
> To: Patrice Chotard <patrice.chotard at foss.st.com>
> To: Srinivas Kandagatla <srini at kernel.org>
> To: Rob Herring <robh at kernel.org>
> To: Krzysztof Kozlowski <krzk+dt at kernel.org>
> To: Conor Dooley <conor+dt at kernel.org>
> To: Maxime Coquelin <mcoquelin.stm32 at gmail.com>
> To: Alexandre Torgue <alexandre.torgue at foss.st.com>
> To: Christophe Roullier <christophe.roullier at foss.st.com>
> Cc: linux-stm32 at st-md-mailman.stormreply.com
> Cc: devicetree at vger.kernel.org
> Cc: linux-arm-kernel at lists.infradead.org
> Cc: linux-kernel at 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        |  38 +-
>  .../bindings/nvmem/st,stm32-tamp-nvram.yaml        |  57 ++
>  MAINTAINERS                                        |   8 +
>  drivers/nvmem/Kconfig                              |  11 +
>  drivers/nvmem/Makefile                             |   2 +
>  drivers/nvmem/stm32-tamp-nvram.c                   | 680 +++++++++++++++++++++
>  6 files changed, 793 insertions(+), 3 deletions(-)
> ---
> base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
> change-id: 20260909-upstream_nvram_reworked-f84a4b37817c
> 
> Best regards,
> --  
> Patrice Chotard <patrice.chotard at foss.st.com>
>