From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793638474; b=1bU1k1SnDF8eNKpc09JuKaSg12g9pWTDDIw0zN1hNIW2TxATOgwm+mbviegMqlvErKo/ s+KkZNpVUrUZwwL8/JN62rti4gwW5DnysZ2CGRsG4Wefg2uw3yp872WkDvacs/zUrKyIZ 5Lui5SJzyOcnnmLQZbZaz/r4mpo0q/41hl0kJhc0jhtEJP1UinR57D1E9+5wxY4lwl/Ff WeU/7zKwfKawf16vNsoTDq2idWboCrDAi0sBRrZVDNcQoQwgKfyguJP/7zdM0XLvqJ2Ns VSBBvBRlICnTcSnf9jp9Ikam8cFJqgSTQGjRziMmFKXLbP6b3LAQFD121aTAActWryg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793638474; h=DMARC-Filter:Received:Received:DKIM-Signature:From:To:Cc:Subject: Date:Message-ID:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=SMo7/u996wbVcHi3k4xgqARzUbdAu1qHiecGi066wTg=; b=ojjqaEu6f9TbGc+5L1UIT0lc80hxpMi8uONqKrzkvZp7p/r3Vwg+OSC4TsAU1LB6K7ij qSJ7doljhamYMh7G6yD739ceG1xrz35x2Od5jr+mJ78mQiOGpUm+ok6+LRtSpuRhflBoW DLgFBe9RGdFrGRRhox4jKn0GOrYBMvvVtuR5F4d0zQSFydyxOHSqIlfYbXJN+EK8VGAUY G2iNj1MGI7muBXy9Qmk66rXwclNY+plmgpH4xy+DvPyD8RsWVLB/J5DxETIm7OlmiGk/2 CzvG6ZYtDh0Iyc0arWgYgQszF8dH0qUxPjSYXLANjFturUwu+r1LF80fE6NQSUsAvMA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=oWy3HQhm; arc=none smtp.remote-ip=217.140.110.172 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 50C3D608C270; Mon, 2 Nov 2026 16:54:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 50C3D608C270 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, unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=oWy3HQhm 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 A81C316F3; Mon, 2 Nov 2026 08:54:29 -0800 (PST) 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 D116E3F59E; Mon, 2 Nov 2026 08:54:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1793638472; bh=L72770060tG1YWBMEpx+PQ5qVJqAP1qUPGT7jZu5ZpY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oWy3HQhmHsHKtd7U32Ydo+OrzCfHSyJGfRI9zN/B6tzEs0y8gdXFccTRucK1e1K2T OxZtl7PTvsRXHgSOuIYQajFqcorTL1Vp2H2Ip/KjyXGu1RY45BDPbkNWxiKQ4p2ch1 2E3ovXXmU2uBrO31zQV/k446DpNQqbdOxSyh722g= 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 v5 RESEND 1/6] dt-bindings: arm: Add Live Firmware Activation Date: Mon, 2 Nov 2026 17:54:15 +0100 Message-ID: <20261102165421.3651202-2-andre.przywara@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261102165421.3651202-1-andre.przywara@arm.com> References: <20261102165421.3651202-1-andre.przywara@arm.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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 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..de97dc88d0b15 --- /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