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 D0E763019AA; Wed, 26 Nov 2025 09:41:04 +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=1764150065; cv=none; b=irzjN7KYfyNR4llT73h/wkU4btUoXNg3KOk4McNGiogjlLoBjmAi5G0VlJEiRC+n9r9SOIdhi+XRHKVg93hEKrzDbGPEmeCV5tV9iphV+FPHh4KPYnspEAMopRaMgnLASM0/FKbFSiG7NW2sJsavtz66JbRidCZYJLIOESmgDKE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764150065; c=relaxed/simple; bh=2A1+6ikQS2cFDqeaqbcWKjj8PkwHoghi5FBELNGe0aw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=PAlkcL2vtf7LK7WmQ9iSd8AghIR5tlYM1JaXHvIwjmprIfN2qgquggqCy/uRiCca89pgxsYWzhRygYlAlxGsjdu7H1R8sse1gh4CNIC9EK8EY8jjVbukeBUxEaMuov9upj0nWYovW96XpL8oR+/IrboxHr4lOTCwXT58w3+njZA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TH1bGdMA; 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="TH1bGdMA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A450EC113D0; Wed, 26 Nov 2025 09:41:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764150064; bh=2A1+6ikQS2cFDqeaqbcWKjj8PkwHoghi5FBELNGe0aw=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=TH1bGdMACILrMX7gjEOo0oSzEZdkrQRdVCdJYv6T0aoNouFQv6xl6Rw8WQFO4gFpn iY59VdF34z58rowyvqP6Vsip/oVwAF6f8NwLWcgxdAdIvNYCGoUWvwm5OXRA4Ubaol hOcRK7MNsYzOv5G+Vr6LBH4VvfHwbbLBjps4/zi2OSp+55z5U1Uz416YTjze1bpkmu hm1Ey+aCR0wm+AnvoKF0IEijnODqIdaiwFbZLnQLzcKG+Ad+FjU5rl5mQdNJu9dEK3 DHywWI68zkQlQMCkM+Vc9h0tf/uXtQbcw+w2WhbelVNO1Dcxie1qbaiF0MXMQ+MxuQ 4bFJPHGjBVjRg== Date: Wed, 26 Nov 2025 10:41:01 +0100 From: Krzysztof Kozlowski To: "Romli, Khairul Anuar" Cc: Rob Herring , Dinh Nguyen , Vinod Koul , Krzysztof Kozlowski , Conor Dooley , "dmaengine@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH 1/2] dt-bindings: dma: snps,dw-axi-dmac: Add compatible string for Agilex5 Message-ID: <20251126-frisky-puma-from-valhalla-e3ee05@kuoka> References: <20251120173608.GA1582568-robh@kernel.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=utf-8 Content-Disposition: inline In-Reply-To: On Wed, Nov 26, 2025 at 07:43:42AM +0000, Romli, Khairul Anuar wrote: > On 21/11/2025 1:36 am, Rob Herring wrote: > > On Thu, Nov 20, 2025 at 07:31:10PM +0800, Khairul Anuar Romli wrote: > >> The address bus on Agilex5 is limited to 40 bits. When SMMU is enable this > >> will cause address truncation and translation faults. Hence introducing > >> "altr,agilex5-axi-dma" to enable platform specific configuration to > >> configure the dma addressable bit mask. > > > > That's likely a bus limitation, not an IP limitation. So that should be > > handled with dma-ranges. > > > > However, adding a specific compatible is perfectly fine. > > > Would it be okay if I rephrase and send the next version with a > correction in the commit message body as your comment in this version? Yes and your DTS patch might need changes - include proper dma-ranges. I also do not see how separate compatible without any driver change solved your case. That's a no-op patch from Linux driver point of view. See also submitting patches in DT dir about the process how patches are grouped together. Best regards, Krzysztof