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[73.243.118.188]) by smtp.gmail.com with ESMTPSA id x14-20020a92d30e000000b00348edca2abesm72006ila.47.2023.09.07.14.40.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Sep 2023 14:40:17 -0700 (PDT) From: Simon Glass To: devicetree@vger.kernel.org Cc: Dhaval Sharma , Guo Dong , U-Boot Mailing List , Yunhui Cui , Chiu Chasel , Mark Rutland , linux-acpi@vger.kernel.org, Rob Herring , Maximilian Brune , Ard Biesheuvel , Tom Rini , Lean Sheng Tan , Gua Guo , ron minnich , Simon Glass Subject: [PATCH v6 2/2] schemas: memory: Add ECC properties Date: Thu, 7 Sep 2023 15:40:11 -0600 Message-ID: <20230907214012.74978-2-sjg@chromium.org> X-Mailer: git-send-email 2.42.0.283.g2d96d420d3-goog In-Reply-To: <20230907214012.74978-1-sjg@chromium.org> References: <20230907214012.74978-1-sjg@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org Some memories provide ECC detection and/or correction. For software which wants to check memory, it is helpful to see which regions provide this feature. Add this as a property of the /memory nodes, since it presumably follows the hardware-level memory system. Signed-off-by: Simon Glass --- Changes in v6: - Use a number of bits instead of a string property - Fix inidcates typo Changes in v5: - Redo to make this property specific to ECC - Provide properties both for detection and correction Changes in v3: - Add new patch to update the /memory nodes dtschema/schemas/memory.yaml | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/dtschema/schemas/memory.yaml b/dtschema/schemas/memory.yaml index 1d74410..1a48b1c 100644 --- a/dtschema/schemas/memory.yaml +++ b/dtschema/schemas/memory.yaml @@ -31,10 +31,21 @@ patternProperties: numa-node-id: $ref: types.yaml#/definitions/uint32 - description: + description: | For the purpose of identification, each NUMA node is associated with a unique token known as a node id. - + ecc-detection-bits: + default: 0 + description: | + If present, this indicates the number of bits of memory error which + can be detected and reported by the Error-Correction Code (ECC) memory + subsystem (typically 0, 1 or 2). + ecc-correction-bits: + default: 0 + description: | + If present, this indicates the number of bits of memory error which + can be corrected by the Error-Correction Code (ECC) memory subsystem + (typically 0, 1 or 2). required: - device_type