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[2a01:cb08:941b:4c00:f383:4db2:82a:81e9]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45a1c718769sm24256305e9.30.2025.08.14.07.42.45 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 14 Aug 2025 07:42:46 -0700 (PDT) Message-ID: Date: Thu, 14 Aug 2025 16:42:45 +0200 Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 06/20] dt-bindings: memory: introduce DDR4 To: Rob Herring , =?UTF-8?Q?Cl=C3=A9ment_Le_Goffic?= Cc: Will Deacon , Mark Rutland , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue , Philipp Zabel , Jonathan Corbet , Gatien Chevallier , Michael Turquette , Stephen Boyd , Gabriel Fernandez , Krzysztof Kozlowski , Julius Werner , linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-clk@vger.kernel.org References: <20250728-ddrperfm-upstream-v5-0-03f1be8ad396@foss.st.com> <20250728-ddrperfm-upstream-v5-6-03f1be8ad396@foss.st.com> <20250730211151.GA1749004-robh@kernel.org> Content-Language: en-US From: =?UTF-8?Q?Cl=C3=A9ment_Le_Goffic?= In-Reply-To: <20250730211151.GA1749004-robh@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Rob, On 30/07/2025 23:11, Rob Herring wrote: > On Mon, Jul 28, 2025 at 05:29:37PM +0200, Clément Le Goffic wrote: >> Introduce JEDEC compliant DDR bindings, that use new memory-props binding. >> >> Signed-off-by: Clément Le Goffic >> --- >> .../memory-controllers/ddr/jedec,ddr4.yaml | 34 ++++++++++++++++++++++ >> 1 file changed, 34 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,ddr4.yaml b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,ddr4.yaml >> new file mode 100644 >> index 000000000000..f457066a2f8b >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,ddr4.yaml >> @@ -0,0 +1,34 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,ddr4.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: DDR3 SDRAM compliant to JEDEC JESD79-4D >> + >> +maintainers: >> + - Krzysztof Kozlowski >> + >> +allOf: >> + - $ref: jedec,sdram-props.yaml# >> + >> +properties: >> + compatible: >> + items: >> + - pattern: "^ddr4-[0-9a-f]{2},[0-9a-f]{1}$" > > Shouldn't this be 'jedec,ddr4-...' That's not the case for lpddr bindings, I wanted both lpddr and ddr bindings to be similar but this can change. > >> + - const: jedec,ddr4 >> + >> +required: >> + - compatible >> + - density >> + - io-width >> + >> +unevaluatedProperties: false >> + >> +examples: >> + - | >> + ddr { >> + compatible = "ddr4-ff,f", "jedec,ddr4"; >> + density = <8192>; >> + io-width = <8>; >> + }; >> >> -- >> 2.43.0 >> Best regards, Clément