From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E6463033D1; Wed, 21 Jan 2026 02:05:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768961129; cv=none; b=pu2BBJliul28h5FbtW8A+xqGu4tbcia9UOB01C2ivGabQk3Ze9rCOg44AAFcwxVsavT92bqvE+0fOA9Dx+x+Ei4HTzNJT6iOLE/9hE0m7vOccnCCoiZzvx47wFW63aExfEV0ZYvtkwTMZALb8c/q2CRHAG0/EB0NnaTvKN5qIRE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768961129; c=relaxed/simple; bh=ilN4HPAMj6+h3erNVdSiAUhOdMjO3QbTUbLpJ8T6sfs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ExWn+39IDINqDr6/BEGz+YUtSSsGMeoYHyR4/CKUqenJdMZBIVfZ40KfHuiugSIkRkG/QsE3ztUYrc5XF+vwBI6GqlfgCHZlnyzV0Mxi+b5WRkIHD+tVqKPD1ryhI9HpmdT2gwzVp31UrvrWGvuLziKz0KL5MAqV/dzDi0DLwYw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XCLtweSp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XCLtweSp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6F0CDC16AAE; Wed, 21 Jan 2026 02:05:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768961128; bh=ilN4HPAMj6+h3erNVdSiAUhOdMjO3QbTUbLpJ8T6sfs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=XCLtweSplCNXPwSs9uPWVo9gyIfyeEJ7s8mu+QV0Tj2/1Wd7jnexVVhh3Hu4yMahp w1akrc4iImGxGCzDXYr7IhAhER61UjpsABfDYwsGkop13VPaYi0bQBkbSuyPRoFXuA 6z/B4vE6lDcX61tskOaO/a4Js1/R0FRkgJ16nHEvTwjEYWAVK+VKMIVjVqEGMvxHIV /ndUC1ozccQb1zsr/XdzHGhcBe5cu0pkcA/6LfTLcnQG23memqFFFbTU+7YTfcN7VZ LuwuQDCihOxUKI24mGZPweUa3SHtpjcVvaIWs5aZsrZYS7dzP/566RlcMXCm0EPcWf vF+N5h2JmRblQ== Date: Tue, 20 Jan 2026 20:05:27 -0600 From: Rob Herring To: Sudeep Holla Cc: Cristian Marussi , Marek Vasut , arm-scmi@vger.kernel.org, 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: <20260121020527.GA1659809-robh@kernel.org> 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 05:02:58PM +0000, Sudeep Holla wrote: > 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. There isn't. The only preference is to be consistent within a file of description either first or last. Rob