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[194.187.74.233]) by smtp.gmail.com with ESMTPSA id z24sm1149121lfb.206.2022.01.25.10.02.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Jan 2022 10:02:41 -0800 (PST) From: =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= To: Rob Herring , Srinivas Kandagatla , Michael Walle Cc: linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Shawn Guo , Li Yang , Frank Rowand , "David S . Miller" , Jakub Kicinski , Ansuel Smith , Andrew Lunn , Florian Fainelli , Hauke Mehrtens , =?utf-8?b?UmFmYcWCIE1pxYJlY2tp?= Subject: [PATCH 2/2] dt-bindings: nvmem: cells: add MAC address cell Date: Tue, 25 Jan 2022 19:01:14 +0100 Message-Id: <20220125180114.12286-3-zajec5@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220125180114.12286-1-zajec5@gmail.com> References: <20220125180114.12286-1-zajec5@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Rafał Miłecki This adds support for describing details of NVMEM cell containing MAC address. Those are often device specific and could be nicely stored in DT. Initial documentation includes support for describing: 1. Cell data format (e.g. Broadcom's NVRAM uses ASCII to store MAC) 2. Reversed bytes flash (required for i.MX6/i.MX7 OCOTP support) 3. Source for multiple addresses (very common in home routers) Signed-off-by: Rafał Miłecki --- .../bindings/nvmem/cells/mac-address.yaml | 94 +++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml diff --git a/Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml b/Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml new file mode 100644 index 000000000000..f8d19e87cdf0 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml @@ -0,0 +1,94 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/cells/mac-address.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVMEM cell containing a MAC address + +maintainers: + - Rafał Miłecki + +properties: + compatible: + const: mac-address + + format: + description: | + Some NVMEM cells contain MAC in a non-binary format. + + ASCII should be specified if MAC is string formatted like: + - "01:23:45:67:89:AB" (30 31 3a 32 33 3a 34 35 3a 36 37 3a 38 39 3a 41 42) + - "01-23-45-67-89-AB" + - "0123456789AB" + enum: + - ascii + + reversed-bytes: + type: boolean + description: | + MAC is stored in reversed bytes order. Example: + Stored value: AB 89 67 45 23 01 + Actual MAC: 01 23 45 67 89 AB + + base-address: + type: boolean + description: | + Marks NVMEM cell as provider of multiple addresses that are relative to + the one actually stored physically. Respective addresses can be requested + by specifying cell index of NVMEM cell. + +allOf: + - $ref: cell.yaml# + - if: + required: + - base-address + then: + properties: + "#nvmem-cell-cells": + const: 1 + required: + - "#nvmem-cell-cells" + +unevaluatedProperties: false + +examples: + - | + partitions { + compatible = "fixed-partitions"; + #address-cells = <1>; + #size-cells = <1>; + + partition@f00000 { + compatible = "nvmem-cells"; + label = "calibration"; + reg = <0xf00000 0x100000>; + ranges = <0 0xf00000 0x100000>; + #address-cells = <1>; + #size-cells = <1>; + + mac@100 { + compatible = "mac-address"; + reg = <0x100 0x6>; + }; + + mac@200 { + compatible = "mac-address"; + reg = <0x200 0x6>; + reversed-bytes; + }; + + mac@300 { + compatible = "mac-address"; + reg = <0x300 0x11>; + format = "ascii"; + }; + + mac@400 { + compatible = "mac-address"; + reg = <0x400 0x6>; + base-address; + #nvmem-cell-cells = <1>; + }; + }; + };