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[93.39.149.95]) by smtp.googlemail.com with ESMTPSA id w6sm6968323qti.63.2020.09.20.02.57.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Sep 2020 02:57:59 -0700 (PDT) From: Ansuel Smith To: Miquel Raynal Cc: Ansuel Smith , Richard Weinberger , Vignesh Raghavendra , Rob Herring , "David S. Miller" , Jakub Kicinski , Andrew Lunn , Heiner Kallweit , Russell King , Frank Rowand , Boris Brezillon , linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v3 4/4] dt-bindings: net: Document use of mac-address-increment Date: Sun, 20 Sep 2020 11:57:22 +0200 Message-Id: <20200920095724.8251-5-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200920095724.8251-1-ansuelsmth@gmail.com> References: <20200920095724.8251-1-ansuelsmth@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Two new bindings are now supported by the of_net driver to increase (or decrease) a mac-address. This can be very useful in case where the system extract the mac-address for the device from a dedicated partition and have a generic mac-address that needs to be incremented based on the device number. - mac-address-increment-byte is used to tell what byte must be incremented (if not set the last byte is increased) - mac-address-increment is used to tell how much to increment of the extracted mac-address decided byte. Signed-off-by: Ansuel Smith --- .../bindings/net/ethernet-controller.yaml | 21 +++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml index fa2baca8c726..8174f64e79bd 100644 --- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml +++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml @@ -32,6 +32,27 @@ properties: - minItems: 6 maxItems: 6 + mac-address-increment: + description: + The MAC address can optionally be increased (or decreased using + negative values) from the original value read (from a nvmem cell + for example). This can be used if the mac is read from a dedicated + partition and must be increased based on the number of device + present in the system. The increment will not overflow/underflow to + the other bytes if it's over 255 or 0. + (example 00:01:02:03:04:ff + 1 == 00:01:02:03:04:00) + minimum: -255 + maximum: 255 + + mac-address-increment-byte: + description: + If 'mac-address-increment' is defined, this will tell what byte of + the mac-address will be increased. If 'mac-address-increment' is + not defined, this option will do nothing. + default: 5 + minimum: 3 + maximum: 5 + max-frame-size: $ref: /schemas/types.yaml#definitions/uint32 description: