From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2FF2C2D94B5; Mon, 6 Jul 2026 13:45:09 +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=1783345512; cv=none; b=BFWPKDUg8k7bAGCV42LMJukKWGtOebvflZHBGMTANKUSbLqziaNbYaQAEPrShPfwunXf2p93qBVAcEkDOhlTMT4XMh2v/GXA0O5s6tti16MxV06vBl9XFnTmYSyXC8Ap2OUwXFzXSos+JvoTWuTLKQY8z3Y72IM6n1i+qhG2xCI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783345512; c=relaxed/simple; bh=sehJcJOBuvj2d1ch7c6naQXLqes3EP/aYzFVaiOMn2c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Olf0ttxn7HJ0YbRLFOaM2NZCylq/FRcbvcSrY7CZ7qVGm1PImu1CNP4ufNiq1nHnPoTptH6tvOhX/a0WSbBI7N2rd6CC4Gq9kKO951+YLhIV4z4xI1ZjklYMeH2zADI90f4yAkF94QvW53XLxH5w4lE7mKdNPRcVoU9nsOEJJlU= 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; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=FZkkAv1c; 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 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="FZkkAv1c" 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 EE4372BCC; Mon, 6 Jul 2026 06:45:04 -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 B7C983F7B4; Mon, 6 Jul 2026 06:45:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1783345509; bh=sehJcJOBuvj2d1ch7c6naQXLqes3EP/aYzFVaiOMn2c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FZkkAv1cX3laU214PsO1i7Llkv6cV3wZWD6iAbiFPo/0JBi0rMSBA2WIGU5vqCme4 wNBLXiYd2Nbg0eQnWTrzLZ9jnGobR7+kwSNsDuN/fR0RQO0/DmdUlcELU+r7Eqaxwd 2NnLAHVv0B+Zuq8WDcCTRTrWPk6IKPB72PtlN7jE= From: Andre Przywara To: Mark Rutland , Lorenzo Pieralisi , Sudeep Holla Cc: Salman Nabi , Vedashree Vidwans , Trilok Soni , Nirmoy Das , vsethi@nvidia.com, Varun Wadekar , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org Subject: [PATCH v3 1/8] dt-bindings: arm: Add Live Firmware Activation Date: Mon, 6 Jul 2026 15:44:41 +0200 Message-ID: <20260706134455.132091-2-andre.przywara@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260706134455.132091-1-andre.przywara@arm.com> References: <20260706134455.132091-1-andre.przywara@arm.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 --- .../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/Documentation/devicetree/bindings/arm/arm,lfa.yaml new file mode 100644 index 000000000000..ef8e250f2da7 --- /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 { + firmware-update { + compatible = "arm,lfa"; + interrupts = ; + }; + }; +... -- 2.43.0