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 53133D29C43 for ; Mon, 19 Jan 2026 16:54:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=8ey93INS060xp59cljOsib2mU2TZmeYKGtq0Zyyk7uA=; b=e3qIz4WEZi0iccXLd6Xe2mLG7x ovDN/EOXyB/HIHl44bOg3JQ4L4yyWkjBI5PEmc+lZJ4RGMfG8PhfVo9OQQRQoCzdZBzYOscIJZzHg 3+IuAfYGT5QNVC9TFaBjN9iPqlXbgrvUJOffX72uA8tjtgqv9CHBGPdpflZp6/mJF7ZM+dDctapH6 +grTggqwQvnKkSOxVFw/4CvlngFS8nkDnTeNLO83DaB3I0Lzi/EVXhhS5idxv4Ig/Zf8bpXt+xwm0 AQ/rcD3twocuKVV6BGEHWxW4JeGq05QEuWpYU1Yo980sAZsroliVD5M3kDnENN0tR2RTyzOsYxt0Y p20h2fyQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhsVr-00000002Ywl-3NLc; Mon, 19 Jan 2026 16:53:59 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhsVn-00000002YvE-45OM for linux-arm-kernel@bombadil.infradead.org; Mon, 19 Jan 2026 16:53:55 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=8ey93INS060xp59cljOsib2mU2TZmeYKGtq0Zyyk7uA=; b=Ns5uPjYYuisNpWVl/jrQL0tvD8 cOd0N10pBKJixWJsZknI3wkhlR9cBOsqKYFiHVmRk95ctFWOFmpBx0ebOLQaXpKr+195TgBprPNFw juh6rfEbZQf1oeXfAMn01hHZKRa1a7gUJ16x+YWv4n5eKqFRIjTb74yF8Ar1xp5Jzwq7w08uvNG46 f3b8N1UYOWxLtVRYgnjHWYYKqJtL5n6jniLVn3qZ9xbvyflvT9LS5PnNXxkH2UszXNbPjlI8Dir49 I4E7i+kg7BPwakblNXac1LlwR6CjRuE2vH1QvkWUBiBlwa9kVmshqbznOCEal18F1J0U5qJoP37Uw /BlXY7gw==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhsVj-0000000Capq-3miO for linux-arm-kernel@lists.infradead.org; Mon, 19 Jan 2026 16:53:54 +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 8EE1F497; Mon, 19 Jan 2026 08:53:42 -0800 (PST) Received: from pluto (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CC76C3F632; Mon, 19 Jan 2026 08:53:47 -0800 (PST) Date: Mon, 19 Jan 2026 16:53:45 +0000 From: Cristian Marussi To: Marek Vasut Cc: arm-scmi@vger.kernel.org, "Rob Herring (Arm)" , Conor Dooley , Cristian Marussi , Florian Fainelli , Krzysztof Kozlowski , Sudeep Holla , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-renesas-soc@vger.kernel.org Subject: Re: [PATCH v4 1/2] dt-bindings: firmware: arm,scmi: Document arm,no-completion-irq property Message-ID: References: <20260117010241.186685-1-marek.vasut+renesas@mailbox.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260117010241.186685-1-marek.vasut+renesas@mailbox.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260119_165352_244408_FF0D848D X-CRM114-Status: GOOD ( 22.67 ) 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, Jan 17, 2026 at 02:02:28AM +0100, Marek Vasut wrote: > Document new property arm,no-completion-irq . This optional property > is intended for hardware that does not generate completion interrupts > and can be used to unconditionally enable forced polling mode of > operation. > > With this property set, such implementations which do not generate > interrupts can be interacted with, until they are fixed to generate > interrupts properly. > > Note that, because the original base protocol exchange also requires > some sort of completion mechanism, it is not possible to query SCMI > itself for this property and it must be described in DT. While this > does look a bit like policy, the SCMI provider is part of the > hardware, hence DT. > > Reviewed-by: Rob Herring (Arm) > Signed-off-by: Marek Vasut > --- > Cc: Conor Dooley > Cc: Cristian Marussi > Cc: Florian Fainelli > Cc: Krzysztof Kozlowski > Cc: Rob Herring > Cc: Sudeep Holla > Cc: arm-scmi@vger.kernel.org > Cc: devicetree@vger.kernel.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-renesas-soc@vger.kernel.org > --- > V2: s@mean@&t and limit poll transport to mailbox/shmem only > V3: - Reformat the commit message, expand property description to > explicitly spell out this is hardware description. > - Rename property from arm,poll-transport to arm,no-completion-irq > V4: - Update first paragraph of commit message and property description > - Add RB from Rob > --- > .../devicetree/bindings/firmware/arm,scmi.yaml | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml > index be817fd9cc34b..d06cca9273c48 100644 > --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml > +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml > @@ -146,6 +146,13 @@ properties: > this platform. If set, the value should be non-zero. > minimum: 1 > > + arm,no-completion-irq: > + type: boolean > + description: Shouldn't these two points have to be swapped as per Sudeep and Rob suggestions ? description: .... type: boolean > + This optional property is intended for hardware that does not generate > + completion interrupts and can be used to unconditionally enable forced > + polling mode of operation. > + > arm,smc-id: > $ref: /schemas/types.yaml#/definitions/uint32 > description: > @@ -379,6 +386,9 @@ then: > - shmem > > else: > + properties: > + arm,no-completion-irq: false > + > if: > properties: With the above corrected, LGTM. Reviewed-by: Cristian Marussi Thanks, Cristian