From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4AE9B3597B; Wed, 29 Jul 2026 04:31:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.154.123 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785299464; cv=none; b=Jo8SdJpJ3hqIGfBPhC89S1JjirQZyJXWxkO//qHDJEL63OZBG9OBzs3Xy/FI1Sqa7ZIQUNlvQ/Gy7Et87/vGcDEi8QvjqDjpDcGs7Mcc/mmhfZsbv1+y6GC7omIQ+t56cDqltCrPze4f1uV4Tgp/UAQkHhl9tywa6LIbxboBIJw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785299464; c=relaxed/simple; bh=6OKUyoQVZMOGEKA3ROpWOyqNbmA1SINiQnLFqFLKpmk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=kUXY7J3BGQm5wg+wLYV/u9fDnaecX/4z3tJufF1Otz6DOaNLxzbjdX84X6rHFQA1QCbwmHz8eA9aJvKDJrIp8axIgiR+PabvKW2t7E0LckbyHUx89pASblG4bFU8Cr2cqsiKdlzjXLiuwO6IdUqKI/ms5g+ogH7iv9LxZN8qjDo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=0czxhsmQ; arc=none smtp.client-ip=68.232.154.123 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="0czxhsmQ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1785299463; x=1816835463; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=6OKUyoQVZMOGEKA3ROpWOyqNbmA1SINiQnLFqFLKpmk=; b=0czxhsmQCcrEXGGgrorYJsTx2phCs7e9Dm5yHDAOo5MU+BrGf3THQAPL a942WAR9UUm/+1xLY8TMPBFZSY/X1DIzpIWwWcqTualqsiOGeAs7E23FM hMEwNbL6zsJLHtyXu4fhcISA6YUIrRqcnR19yoi3n5D7mekYWUeH8xifp jfO6Vti0NQLDp1WWUCPLnPdVAMMf3T2sTVh9LC7jwbGJ6xKAUDvFStA7a WrG+XPOOKlYn9gM/WrZbXQisBC/pyM6m7rp2BeN5aanKqWgtHJDMTOr4o 2Twq10phAXuSqIaBmHEB9qTmMsmw4onDmG0EXWgB3U/ScP5Vk5MxMR2pH Q==; X-CSE-ConnectionGUID: mFpSISaCTtuD1B6nciX0HA== X-CSE-MsgGUID: +9riDs2qQreXS9/SRuyfaw== X-IronPort-AV: E=Sophos;i="6.25,191,1779174000"; d="scan'208";a="60446910" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Jul 2026 21:31:02 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.87.152) by chn-vm-ex1.mchp-main.com (10.10.87.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.2562.43; Tue, 28 Jul 2026 21:31:01 -0700 Received: from che-ll-i67131.microchip.com (10.10.85.11) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Tue, 28 Jul 2026 21:30:53 -0700 From: Manikandan Muralidharan To: , , , , , , , , , , , , , , , , , , , , , , CC: Manikandan Muralidharan Subject: [PATCH v6 2/7] dt-bindings: nvmem: layouts: add Microchip/SST SFDP EUI layout Date: Wed, 29 Jul 2026 10:00:21 +0530 Message-ID: <20260729043026.1811147-3-manikandan.m@microchip.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260729043026.1811147-1-manikandan.m@microchip.com> References: <20260729043026.1811147-1-manikandan.m@microchip.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain Add a binding for the NVMEM layout that exposes the factory-programmed EUI-48 identifier from the Microchip/SST vendor-specific SFDP parameter table (e.g. SST26VF064BEUI) as a "mac-address" NVMEM cell, and reference it from nvmem-layout.yaml. Reviewed-by: Linus Walleij Signed-off-by: Manikandan Muralidharan --- .../layouts/microchip,sst26vf-sfdp-eui.yaml | 60 +++++++++++++++++++ .../bindings/nvmem/layouts/nvmem-layout.yaml | 1 + 2 files changed, 61 insertions(+) create mode 100644 Documentation/devicetree/bindings/nvmem/layouts/microchip,sst26vf-sfdp-eui.yaml diff --git a/Documentation/devicetree/bindings/nvmem/layouts/microchip,sst26vf-sfdp-eui.yaml b/Documentation/devicetree/bindings/nvmem/layouts/microchip,sst26vf-sfdp-eui.yaml new file mode 100644 index 000000000000..37357efb7840 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/layouts/microchip,sst26vf-sfdp-eui.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/layouts/microchip,sst26vf-sfdp-eui.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVMEM layout of the Microchip/SST SFDP EUI-48 identifier + +maintainers: + - Manikandan Muralidharan + +description: + Some Microchip/SST serial flashes (for example the SST26VF064BEUI) are + factory programmed with a globally unique EUI-48 identifier stored in a + vendor-specific SFDP parameter table and permanently write-protected. This + layout locates that table and exposes the EUI-48 as an NVMEM cell so that, + for example, a network driver can use it as a MAC address. The location of + the data is discovered at runtime from the SFDP; no offset is encoded in the + device tree. + +select: false + +properties: + compatible: + const: microchip,sst26vf-sfdp-eui + + mac-address: + type: object + description: + The factory-programmed EUI-48 identifier, usable as a MAC address. + additionalProperties: false + +required: + - compatible + +additionalProperties: false + +examples: + - | + spi { + #address-cells = <1>; + #size-cells = <0>; + + flash@0 { + compatible = "jedec,spi-nor"; + reg = <0>; + + sfdp { + compatible = "jedec,sfdp"; + + nvmem-layout { + compatible = "microchip,sst26vf-sfdp-eui"; + + mac-address { + }; + }; + }; + }; + }; +... diff --git a/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml b/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml index 382507060651..e63b93083821 100644 --- a/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml +++ b/Documentation/devicetree/bindings/nvmem/layouts/nvmem-layout.yaml @@ -20,6 +20,7 @@ description: | oneOf: - $ref: fixed-layout.yaml - $ref: kontron,sl28-vpd.yaml + - $ref: microchip,sst26vf-sfdp-eui.yaml - $ref: onie,tlv-layout.yaml - $ref: u-boot,env.yaml -- 2.43.0