From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f42.google.com (mail-pj1-f42.google.com [209.85.216.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 731FC3BE147 for ; Mon, 11 May 2026 22:05:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.42 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778537103; cv=none; b=JmSRvmkv4sQg4SrUH5iM7igGVjhy4YAbkLSHckg2pxZtwfnbAYc3NFfi6lJNU2gG15+DLLQYk2YifIu0Ir750g9nxBA9ku9HQXk2JYBru7mtyGt1Gyf3MSkvpSqOLyR/+wF13s3OWoDOoj0ZlfQUHNQqJAOO4zu/8gjmV+7jv/k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778537103; c=relaxed/simple; bh=CIAqLMPPvoM4e+OnpQX7C3aTrPFyWScfWmBqyOx9pzE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=hJhXM4PnkxObXLRZcHOdV0ABSIZ3PytM1vsSmoCiA17ifisTbh7IRD0sWlYfEk/GAfKPSebbwDzE6RunKd2LvTfuVvtiDBHVp6aogM6J2+uSk4xQjGjgbfzaPvbjYjSHS76kWtX3QaHy++FJeCpTMnhyd2R64Ctso62wiaDjL70= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=kXmNjSjl; arc=none smtp.client-ip=209.85.216.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="kXmNjSjl" Received: by mail-pj1-f42.google.com with SMTP id 98e67ed59e1d1-3660b84347dso2983527a91.1 for ; Mon, 11 May 2026 15:05:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1778537102; x=1779141902; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=TwJIirVuKqVtnnrvOqanwGLH5bXkSp5/1F2o6q3Zsnw=; b=kXmNjSjlWLrmBtWjmPmvzoihmIJqJgSMX78uD22/VL3H3nbSsPoQoF/FbKTnUgbA9+ juJoj4FEnivEpFw1ICDqYUf9AfqVbsCB+UOPpidNmeTdaVw2UJmoisjiMY0xrM8F3D0O EzyIdzrdSZY6i1eZYkh8ge/gEwSBFdXedu0VluuKPuEtPY/RGv+QpRrmKGov6VBXE1to ST++dFmlM5JIvZEcSy3aC8XUxmUC0qx2f0QdudhDRWJ8BnltWGuGjfAoS8QN0Vkc/Www tdvck8BLlZSJsQ8Z2wTxt+xfA7vwyD0b1I5G5xevswuP77QCmIyYrAkAtCIcZOZlyItv lDFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778537102; x=1779141902; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TwJIirVuKqVtnnrvOqanwGLH5bXkSp5/1F2o6q3Zsnw=; b=ASpRXrIslg7N0mHHC+44711n26oWzcqi14dyKiDDeniD9i3OYOuqll2i3I+p+ZaBP3 Yvhq+EjwIv2wMj/LtnVY/NEECsmbEfaijPsuDdH1P6X9ii48xKqLrWNi6QnP7zBAgiVa Sa5fZQgBb3zQJ6Zy2iG9W929nglLmjYi1m6Z8c/zgMJ+PzDFIO+FEbjJVPltKa3R66wC J9TFGib5pam0HZZHVu0+h74Dr46KoffAvAd3S6P+900IZwhN2PXmmbcC8OSaUmJr2Uq/ NooOkuQGx8E0dMO5DUq6CLhqFPnEUegk43/LlhBzHj49otgEoyZqhvlg44IRqIMGWHHH fBrg== X-Forwarded-Encrypted: i=1; AFNElJ/fXypT5Y0L/AZOt/+asvtXb/7pcprVcrs+GsdEVWCmSXYACDKBTDe4EZ+/vGv1uKr8Xp2WDR0gsbzE@vger.kernel.org X-Gm-Message-State: AOJu0YxlND/vKqWgdTH0PYe0rGXbPgNqIww381I3YlGxc3hgTLYGkwmX nBF9pruoYOlibrL0im6mM7K9H0S/BU4g/YAg2ycZ66e8TwczR0tfE8Dk X-Gm-Gg: Acq92OH1zXQPP1PYIipNLc+hJgdEZUe1ouXOLYqEvNGfxJKpMDhWrKKME8tRQOc3wQc gUzQ24xgUjGMT2OdSCm653skiB3lx6TMT7Jkc6CCx8FRUY5tYFl6u26NvHf5qPWXA5EXAY8HfuT cEGLEbUR2uE2IoWFRHL0dg01mCdWcKgdB/Em6IUj13YXhKvKzABziatDXP3GmeYrokrC+HVZsNw xBkHjKfxeIogl30Sp4W53XWmIubA1nsWzFoJ6GICYFxDS9CbqT1/aq4xFM/XZ7mIRQ8r0Bc0xOB hpIwQCsRvdKdxqqJ2nGEKv3GugTTbt8HtnLW7YfsNrN284qiprBoWHfVd7oSlMOJ1otBSdMqLG2 8YwTdRYL0E1LH03OvCAPPBgL4NQ9V2rIPFRkpvmbgHwQSpXr+W8Jt50yO64s8X3E6OP0E1O0VuU 7ULE0Tkydf4acAIpak6S0eYRU= X-Received: by 2002:a17:90b:3d8a:b0:364:a173:2d61 with SMTP id 98e67ed59e1d1-368b2511be6mr449645a91.11.1778537101695; Mon, 11 May 2026 15:05:01 -0700 (PDT) Received: from localhost ([2001:19f0:8001:1b2d:5400:5ff:fefa:a95d]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c826771c6ddsm9907259a12.23.2026.05.11.15.05.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 May 2026 15:05:01 -0700 (PDT) Date: Tue, 12 May 2026 06:04:36 +0800 From: Inochi Amaoto To: Conor Dooley , Inochi Amaoto Cc: Eugeniy Paltsev , Vinod Koul , Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen Wang , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Alexander Sverdlin , Longbin Li , Yixun Lan , "Anton D. Stavinskii" , dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, sophgo@lists.linux.dev, linux-riscv@lists.infradead.org, Yixun Lan Subject: Re: [PATCH v6 1/2] dt-bindings: dma: snps,dw-axi-dmac: Add fallback compatible for CV1800B Message-ID: References: <20260511063818.463877-1-inochiama@gmail.com> <20260511063818.463877-2-inochiama@gmail.com> <20260511-crave-sworn-3b43371ce11a@spud> 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: <20260511-crave-sworn-3b43371ce11a@spud> On Mon, May 11, 2026 at 05:01:01PM +0100, Conor Dooley wrote: > On Mon, May 11, 2026 at 02:38:16PM +0800, Inochi Amaoto wrote: > > The previous version of the binding change only add compatible > > string without adding the fallback compatible, this breaks > > backward compatibility. Add the needed fallback compatible to > > fix this. > > I don't understand how adding a specific comaptible affected backwards > compatibility. Did the dts originally use the snps compatible before the > device specific one was added? > Yes, the device is already in DTS, and since I find an quirk for it. A new compatible with fallback is necessary. Regards, Inochi > > > > Fixes: be3e2a0419c6 ("dt-bindings: dma: snps,dw-axi-dmac: Add CV1800B compatible") > > Signed-off-by: Inochi Amaoto > > --- > > Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml | 5 +++-- > > 1 file changed, 3 insertions(+), 2 deletions(-) > > > > diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > > index 804514732dbe..0a30a455b0ee 100644 > > --- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > > +++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml > > @@ -21,11 +21,12 @@ properties: > > - enum: > > - snps,axi-dma-1.01a > > - intel,kmb-axi-dma > > - - sophgo,cv1800b-axi-dma > > - starfive,jh7110-axi-dma > > - starfive,jh8100-axi-dma > > - items: > > - - const: altr,agilex5-axi-dma > > + - enum: > > + - altr,agilex5-axi-dma > > + - sophgo,cv1800b-axi-dma > > - const: snps,axi-dma-1.01a > > > > reg: > > -- > > 2.54.0 > >