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 2422124BBF4; Mon, 19 Jan 2026 17:03:03 +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=1768842184; cv=none; b=oqYQly4LQRj+wseObne7tL3mK4jFA+YWuSD6NQIwd8iIkLmtZZJSuVDad7jXTQ1FuhCXeezLk+biKBL3BOI/vZc6tCGJNFdyLgWxKe4PPNlV/YVn/imol31Bb4q6toHSHR2RwLE81kblmZm0RLHvw61Rj6RAjtRASLymEU1anek= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768842184; c=relaxed/simple; bh=XFthLs5/pgPXTCEknPIP9s+LfJ67tRcBR2V1sNm7llo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=gvuG2wcIQoqexLUFxvo9G2RUn/l3DCz8JD/qXi9GXGv5zza/z2r7TPIydHxGsbDZOTsCtFo5SPa/BmPwDB3KkMUsGmDmy65aywA9ir+y0X+JMHaUi+w0KNNxED9W8fd0mpQMxhIEuVtNcFKN8bCJ2SzTZnp3PVNwqJ05EfWJd5s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=foss.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=foss.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 29D7E497; Mon, 19 Jan 2026 09:02:56 -0800 (PST) Received: from bogus (e124108.arm.com [10.1.32.49]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id D7F0C3F632; Mon, 19 Jan 2026 09:03:00 -0800 (PST) Date: Mon, 19 Jan 2026 17:02:58 +0000 From: Sudeep Holla To: Cristian Marussi Cc: Marek Vasut , arm-scmi@vger.kernel.org, Sudeep Holla , "Rob Herring (Arm)" , Conor Dooley , Florian Fainelli , Krzysztof Kozlowski , 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> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Jan 19, 2026 at 04:53:45PM +0000, Cristian Marussi wrote: > 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 > I was just referring to the points covered under the `description` and not the order of `type` and `description`. I am not sure if there is any such requirement as well. I am happy with this version, but this needs to wait for the merge window following the next as I have already sent the PR to SoC teams. -- Regards, Sudeep