From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CB80BC982DF for ; Fri, 18 Sep 2026 14:11:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:To:From:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=A6iE/t0wNDE0ElrSZVJaJwZvtHHEJQB3/1u8+sj4yP4=; b=2vHaEvi7HSfygT d3Lm2A5NGFiII6o+a0SdOk1BAX+eBPlJs1GwGzwfNcD21Cy7bBZUhz4qi1qnl5DfpDrm2HzjUStYj rla473CVmjpA1U5u7KI0E/EgIPaw4KXXB+XMdW58jfjvWbwjy4Iv+fScmonXV3dEQKpU1TLCWzaNO BFQuGUOXmiUNW95YDPgEJIzYE8CkqQozYDz+MvLxBoSGIzXbeokJa5oZIgOUNVYmfgomt/J8JKyOg 5RwnLrwHHzBqrLhV1/4ZL6aFVi2t/mszlANLOv1T56FwITNUQ43AH9EO++VETl42GGgmBQqpYKvFn UBZx+cI1NmdCplFtHbhQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7ZJN-0000000EfjO-1qIL; Fri, 18 Sep 2026 14:11:33 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x7ZJI-0000000EfhN-0Zo8 for linux-arm-kernel@lists.infradead.org; Fri, 18 Sep 2026 14:11:30 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 599851C00; Fri, 18 Sep 2026 07:11:23 -0700 (PDT) Received: from e142021.Arm.com (e142021.arm.com [10.41.4.144]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E2E733F86F; Fri, 18 Sep 2026 07:11:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1789740686; bh=Dws0+kP7wIvnciLiLRG0KeMMYGifjNtg4V1UwKQlzQA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E9uWzsZ7sS4KuvJ8qtJYv5lutyhYe1Hn9vg3IxX9eYihuDRFC4Qlf9jQbFKFRZ82e 5AcfhCO3xpzsgABAjqNtbdXBrRfHoJmbRhNEyfbDC04foJDSuiAeP2xDnWQGjoFpJK Yz6Es4bWMev78IT/hgeNyqhKl5eu76taJ+TWoSCc= From: Andre Przywara To: Mark Rutland , Lorenzo Pieralisi , Sudeep Holla Subject: [PATCH v4 1/8] dt-bindings: arm: Add Live Firmware Activation Date: Fri, 18 Sep 2026 16:11:04 +0200 Message-ID: <20260918141112.2115555-2-andre.przywara@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260918141112.2115555-1-andre.przywara@arm.com> References: <20260918141112.2115555-1-andre.przywara@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260918_071129_421850_D8236A0E X-CRM114-Status: GOOD ( 14.35 ) 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: , Cc: Conor Dooley , vsethi@nvidia.com, Salman Nabi , Rob Herring , linux-kernel@vger.kernel.org, Varun Wadekar , Trilok Soni , devicetree@vger.kernel.org, Nirmoy Das , Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The Arm Live Firmware Activation spec [1] describes updating firmware images during runtime, without requiring a reboot. Update images might be deployed out-of-band, for instance via a BMC, in this case the OS needs to be notified about the availability of a new image. Describe an interrupt that could be triggered by the platform, to notify about any changes. [1] https://developer.arm.com/documentation/den0147/latest/ Signed-off-by: Andre Przywara Reviewed-by: Rob Herring (Arm) --- .../devicetree/bindings/arm/arm,lfa.yaml | 50 +++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/arm,lfa.yaml diff --git a/Documentation/devicetree/bindings/arm/arm,lfa.yaml b/Documentation/devicetree/bindings/arm/arm,lfa.yaml new file mode 100644 index 0000000000000..179c542f383d4 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/arm,lfa.yaml @@ -0,0 +1,50 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/arm/arm,lfa.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Arm Live Firmware Activation (LFA) + +maintainers: + - Andre Przywara + - Sudeep Holla + +description: + The Arm Live Firmware Activation (LFA) specification [1] describes a + firmware interface to activate an updated firmware at runtime, without + requiring a reboot. Updates might be supplied out-of-band, for instance + via a BMC, in which case the platform needs to notify an OS about pending + image updates. + [1] https://developer.arm.com/documentation/den0147/latest/ + +properties: + compatible: + const: arm,lfa + + interrupts: + maxItems: 1 + description: + The notification interrupt for changed firmware image status. For + an out-of-band firmware update, some system entity would signal + the availability of a firmware update to the host OS via this interrupt. + + This must be an edge-triggered IRQ. + +required: + - compatible + - interrupts + +additionalProperties: false + +examples: + - | + #include + + firmware { + firmware-update { + compatible = "arm,lfa"; + interrupts = ; + }; + }; +... -- 2.43.0