From: Patrice Chotard <patrice.chotard@foss.st.com>
To: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Christophe Roullier <christophe.roullier@foss.st.com>,
Srinivas Kandagatla <srini@kernel.org>
Cc: Simeon Marijon <simeon.marijon@foss.st.com>,
<linux-stm32@st-md-mailman.stormreply.com>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>,
Patrice Chotard <patrice.chotard@foss.st.com>,
Gatien Chevallier <gatien.chevallier@foss.st.com>
Subject: [PATCH v2 0/3] Add STM32 TAMP nvram driver support
Date: Wed, 30 Sep 2026 09:41:41 +0200 [thread overview]
Message-ID: <20260930-upstream_nvram_reworked-v2-0-cfda749ee0b7@foss.st.com> (raw)
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 <simeon.marijon@foss.st.com>
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 <christophe.roullier@foss.st.com>
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 <patrice.chotard@foss.st.com>
next reply other threads:[~2026-09-30 7:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-30 7:41 Patrice Chotard [this message]
2026-09-30 7:41 ` [PATCH v2 1/3] dt-bindings: nvmem: add STM32MPX TAMP backup registers Patrice Chotard
2026-09-30 7:41 ` [PATCH v2 2/3] dt-bindings: arm: stm32: allow TAMP nvram child node for syscon Patrice Chotard
2026-09-30 7:41 ` [PATCH v2 3/3] nvmem: stm32: add TAMP nvmem driver Patrice Chotard
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