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Sun, 27 Feb 2022 06:57:51 -0500 (EST) From: Sven Peter To: Srinivas Kandagatla , Rob Herring Cc: Sven Peter , Hector Martin , Alyssa Rosenzweig , Mark Kettenis , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] dt-bindings: nvmem: Add apple,efuses Date: Sun, 27 Feb 2022 12:57:42 +0100 Message-Id: <20220227115743.69059-1-sven@svenpeter.dev> X-Mailer: git-send-email 2.30.1 (Apple Git-130) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220227_035800_593527_932D70A2 X-CRM114-Status: GOOD ( 12.26 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Apple SoCs come with eFuses used to store factory-programmed data such as calibration settings for the PCIe and Type-C PHY. Signed-off-by: Sven Peter --- .../bindings/nvmem/apple,efuses.yaml | 50 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/apple,efuses.yaml diff --git a/Documentation/devicetree/bindings/nvmem/apple,efuses.yaml b/Documentation/devicetree/bindings/nvmem/apple,efuses.yaml new file mode 100644 index 000000000000..a735d54856ae --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/apple,efuses.yaml @@ -0,0 +1,50 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/apple,efuses.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Apple SoC eFuse-based NVMEM + +description: | + Apple SoCs such as the M1 contain factory-programmed eFuses used to e.g. store + calibration data for the PCIe and the Type-C PHY or unique chip identifiers such + as the ECID. + +maintainers: + - Sven Peter + +allOf: + - $ref: "nvmem.yaml#" + +properties: + compatible: + items: + - enum: + - apple,t8103-efuses + - apple,t6000-efuses + - const: apple,efuses + + reg: + maxItems: 1 + +required: + - compatible + - reg + +unevaluatedProperties: false + +examples: + - | + efuse@3d2bc000 { + compatible = "apple,t8103-efuses", "apple,efuses"; + reg = <0x3d2bc000 0x1000>; + #address-cells = <1>; + #size-cells = <1>; + + ecid: efuse@500 { + reg = <0x500 0x8>; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index 2524b75763cd..1bc57af09c80 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1771,6 +1771,7 @@ F: Documentation/devicetree/bindings/arm/apple/* F: Documentation/devicetree/bindings/i2c/apple,i2c.yaml F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml F: Documentation/devicetree/bindings/mailbox/apple,mailbox.yaml +F: Documentation/devicetree/bindings/nvmem/apple,efuses.yaml F: Documentation/devicetree/bindings/pci/apple,pcie.yaml F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml F: Documentation/devicetree/bindings/power/apple*