From: Marek Vasut <marex@denx.de> To: linux-arm-kernel@lists.infradead.org Cc: "Marek Vasut" <marex@denx.de>, "Alexandre Torgue" <alexandre.torgue@foss.st.com>, "Rafał Miłecki" <rafal@milecki.pl>, "Rob Herring" <robh+dt@kernel.org>, "Srinivas Kandagatla" <srinivas.kandagatla@linaro.org>, devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH 1/3] [RFC] dt-bindings: nvmem: syscon: Add syscon backed nvmem bindings Date: Fri, 28 Oct 2022 00:50:18 +0200 [thread overview] Message-ID: <20221027225020.215149-1-marex@denx.de> (raw) Add trivial bindings for driver which permits exposing syscon backed register to userspace. This is useful e.g. to expose U-Boot boot counter on various platforms where the boot counter is stored in random volatile register, like STM32MP15xx TAMP_BKPxR register. Signed-off-by: Marek Vasut <marex@denx.de> --- Cc: Alexandre Torgue <alexandre.torgue@foss.st.com> Cc: Rafał Miłecki <rafal@milecki.pl> Cc: Rob Herring <robh+dt@kernel.org> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: devicetree@vger.kernel.org Cc: linux-stm32@st-md-mailman.stormreply.com To: linux-arm-kernel@lists.infradead.org --- .../bindings/nvmem/nvmem-syscon.yaml | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/nvmem-syscon.yaml diff --git a/Documentation/devicetree/bindings/nvmem/nvmem-syscon.yaml b/Documentation/devicetree/bindings/nvmem/nvmem-syscon.yaml new file mode 100644 index 0000000000000..3035a0b2cd24a --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/nvmem-syscon.yaml @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/nvmem-syscon.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Generic syscon backed nvmem + +maintainers: + - Marek Vasut <marex@denx.de> + +allOf: + - $ref: "nvmem.yaml#" + +properties: + compatible: + enum: + - nvmem-syscon + + reg: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + tamp@5c00a000 { + compatible = "st,stm32-tamp", "syscon", "simple-mfd"; + reg = <0x5c00a000 0x400>; + + nvmem-syscon { + compatible = "nvmem-syscon"; + reg = <0x14c 0x4>; + }; + }; -- 2.35.1
WARNING: multiple messages have this Message-ID (diff)
From: Marek Vasut <marex@denx.de> To: linux-arm-kernel@lists.infradead.org Cc: "Marek Vasut" <marex@denx.de>, "Alexandre Torgue" <alexandre.torgue@foss.st.com>, "Rafał Miłecki" <rafal@milecki.pl>, "Rob Herring" <robh+dt@kernel.org>, "Srinivas Kandagatla" <srinivas.kandagatla@linaro.org>, devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH 1/3] [RFC] dt-bindings: nvmem: syscon: Add syscon backed nvmem bindings Date: Fri, 28 Oct 2022 00:50:18 +0200 [thread overview] Message-ID: <20221027225020.215149-1-marex@denx.de> (raw) Add trivial bindings for driver which permits exposing syscon backed register to userspace. This is useful e.g. to expose U-Boot boot counter on various platforms where the boot counter is stored in random volatile register, like STM32MP15xx TAMP_BKPxR register. Signed-off-by: Marek Vasut <marex@denx.de> --- Cc: Alexandre Torgue <alexandre.torgue@foss.st.com> Cc: Rafał Miłecki <rafal@milecki.pl> Cc: Rob Herring <robh+dt@kernel.org> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: devicetree@vger.kernel.org Cc: linux-stm32@st-md-mailman.stormreply.com To: linux-arm-kernel@lists.infradead.org --- .../bindings/nvmem/nvmem-syscon.yaml | 39 +++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/nvmem-syscon.yaml diff --git a/Documentation/devicetree/bindings/nvmem/nvmem-syscon.yaml b/Documentation/devicetree/bindings/nvmem/nvmem-syscon.yaml new file mode 100644 index 0000000000000..3035a0b2cd24a --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/nvmem-syscon.yaml @@ -0,0 +1,39 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/nvmem-syscon.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Generic syscon backed nvmem + +maintainers: + - Marek Vasut <marex@denx.de> + +allOf: + - $ref: "nvmem.yaml#" + +properties: + compatible: + enum: + - nvmem-syscon + + reg: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + tamp@5c00a000 { + compatible = "st,stm32-tamp", "syscon", "simple-mfd"; + reg = <0x5c00a000 0x400>; + + nvmem-syscon { + compatible = "nvmem-syscon"; + reg = <0x14c 0x4>; + }; + }; -- 2.35.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2022-10-27 22:50 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-10-27 22:50 Marek Vasut [this message] 2022-10-27 22:50 ` [PATCH 1/3] [RFC] dt-bindings: nvmem: syscon: Add syscon backed nvmem bindings Marek Vasut 2022-10-27 22:50 ` [PATCH 2/3] [RFC] nvmem: syscon: Add syscon backed nvmem driver Marek Vasut 2022-10-27 22:50 ` Marek Vasut 2022-10-27 22:50 ` [PATCH 3/3] [RFC] ARM: dts: stm32: Add nvmem-syscon node to TAMP to expose boot count on DHSOM Marek Vasut 2022-10-27 22:50 ` Marek Vasut 2022-10-28 12:20 ` [PATCH 1/3] [RFC] dt-bindings: nvmem: syscon: Add syscon backed nvmem bindings Rob Herring 2022-10-28 12:20 ` Rob Herring 2022-10-28 21:28 ` Rob Herring 2022-10-28 21:28 ` Rob Herring 2022-11-27 22:05 ` Marek Vasut 2022-11-27 22:05 ` Marek Vasut
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