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 5FC603451AA; Thu, 20 Nov 2025 14:57:04 +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=1763650624; cv=none; b=bIUEnqiL0XlvsxGGbGUaCraaYOpqvFkm0bZIiPpy2Kmt1Q0AhLjj2x0Lg5TMQBMcTJsciTBbw+yYNk2Z2BDGCdqd37zeHDPB5V1B2tzrSvTGIdnjmtDpRoAm22qWfcg+OQN7UM3yi+vYgVYYiq43SlTdrChXCPMGJmcjJWO8EK0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763650624; c=relaxed/simple; bh=ZAWEhvuGNxLW528zSSPNsK40qVVkeMvPLNo31hKx7FU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=NhUKTm7SIwF97mYiAs6pvRIHTVI51qaBO+FS1kk39PRRGfIyfP1unUjbY+Gd+rjXaqqqOmlCJNlBe9fq7UbS9YAiVv5eP5FGlPGpCIrsk4yh8q/aToFURWlE03ljO+tarDUy25P6iuxqArhgMeT6jLuuNuktRVt9cmYbBT9F+h8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=a31r7nz5; 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="a31r7nz5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AFAC8C113D0; Thu, 20 Nov 2025 14:57:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763650623; bh=ZAWEhvuGNxLW528zSSPNsK40qVVkeMvPLNo31hKx7FU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=a31r7nz53cyUEYwpuoTtq+Q9RJYSZkSl1zEN4oG+lYTBthELcNwkHF7oYMp0iZgPz K88gFCg+CatZvxK+BzgIPfiOswIfy+KVLcs/lFE/G7r65lmxzKy9UToz1njvtoY+nM eMdTTNSMrPVqi62uPPoN/gR2WltIcHPC9o2dexHw+EK85Lde0F/atyDeor5sbtBZML CLzPqRnpxk7bLY7/AcbMm0VVwI3AnqcNO9CQoZEw98KFHeEqoCo9695+2IeO0nnIRr jDkX4Brb7LKk9Z+a5mkoI2hAmLg2tGunwQOFV7C/H2HjK1gsfw0KehB2tgd2fo06Ar BCJLlF+filw1Q== Date: Thu, 20 Nov 2025 08:57:02 -0600 From: "Rob Herring (Arm)" To: =?iso-8859-1?Q?Cl=E9ment?= Le Goffic Cc: linux-arm-kernel@lists.infradead.org, Maxime Coquelin , linux-stm32@st-md-mailman.stormreply.com, Conor Dooley , Alexandre Torgue , Julius Werner , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , Krzysztof Kozlowski , devicetree@vger.kernel.org, =?iso-8859-1?Q?Cl=E9ment?= Le Goffic Subject: Re: [PATCH v9 2/7] dt-bindings: memory: introduce DDR4 Message-ID: <176365062162.1254978.3113045721070075271.robh@kernel.org> References: <20251118-b4-ddr-bindings-v9-0-a033ac5144da@gmail.com> <20251118-b4-ddr-bindings-v9-2-a033ac5144da@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20251118-b4-ddr-bindings-v9-2-a033ac5144da@gmail.com> On Tue, 18 Nov 2025 16:07:58 +0100, Clément Le Goffic wrote: > From: Clément Le Goffic > > Introduce JEDEC compliant DDR bindings, that use new memory-props binding. > > The DDR4 compatible can be made of explicit vendor names and part > numbers or be of the form "ddrX-YYYY,AAAA...-ZZ" when associated with an > SPD, where (according to JEDEC SPD4.1.2.L-6): > - YYYY is the manufacturer ID > - AAAA... is the part number > - ZZ is the revision ID > > The former form is useful when the SDRAM vendor and part number are > known, for example, when memory is soldered on the board. > The latter form is useful when SDRAM nodes are created at runtime by > boot firmware that doesn't have access to static part number information. > > Signed-off-by: Clément Le Goffic > Signed-off-by: Clément Le Goffic > --- > .../memory-controllers/ddr/jedec,ddr4.yaml | 34 ++++++++++++++++++++++ > 1 file changed, 34 insertions(+) > Reviewed-by: Rob Herring (Arm)