From nobody Tue Apr 7 00:43:03 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A71993A6F00; Tue, 17 Mar 2026 10:33:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773743628; cv=none; b=Mz9u6M4fNLBuuOKxdExuBaeQpo4OkhHF/m6r2bLLwCiBqI6In6E7CY93MabkWlLzdrZFtt8Wv9lONUJBIq9YIgyqIbOPQrhu2x9CAzSH4aYHRv/o4JuGy91gZxycLxXj13D4oiC8YNLxht8Vy/pEjCqzSe0Z2LTUUridTTwvtIo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773743628; c=relaxed/simple; bh=l/kDrBX29807jE/FxqVx1tp9soejGDrbHEFGKncrVhk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RI62jCnuYJhz0YR2yilfNa1Dm/XppyH736FxhEr1f1PB21tgPK5WH7bInE8dNSicy/6Kp4CicRSr6IZQRAJlHyRSvnqjicbvKp0++u5UHEoZ2RK2EHYR0tW5A8Vfo58StAGp7I7OzdCPYn7QhHlRR+cAFeP//8Sy7uilaKbATnM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com 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 18D7A1477; Tue, 17 Mar 2026 03:33:41 -0700 (PDT) Received: from e142021.fritz.box (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B8F143F7BD; Tue, 17 Mar 2026 03:33:44 -0700 (PDT) From: Andre Przywara To: Mark Rutland , Lorenzo Pieralisi , Sudeep Holla , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Salman Nabi , Vedashree Vidwans , Trilok Soni , Nirmoy Das , vsethi@nvidia.com, vwadekar@nvidia.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v2 1/8] dt-bindings: arm: Add Live Firmware Activation binding Date: Tue, 17 Mar 2026 11:33:27 +0100 Message-ID: <20260317103336.1273582-2-andre.przywara@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260317103336.1273582-1-andre.przywara@arm.com> References: <20260317103336.1273582-1-andre.przywara@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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. This binding describes 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 --- .../devicetree/bindings/arm/arm,lfa.yaml | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/arm,lfa.yaml diff --git a/Documentation/devicetree/bindings/arm/arm,lfa.yaml b/Documenta= tion/devicetree/bindings/arm/arm,lfa.yaml new file mode 100644 index 000000000000..92f0564fd672 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/arm,lfa.yaml @@ -0,0 +1,45 @@ +# 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: notification interrupt for changed firmware image status + +required: + - compatible + - interrupts + +additionalProperties: false + +examples: + - | + #include + + firmware { + arm-lfa { + compatible =3D "arm,lfa"; + interrupts =3D ; + }; + }; +... --=20 2.43.0