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Wed, 22 May 2024 23:54:37 GMT Received: from hu-eberman-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Wed, 22 May 2024 16:54:37 -0700 From: Elliot Berman To: Elliot Berman CC: Conor Dooley , Rob Herring , "Frank Rowand" , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Amrit Anand , "Peter Griffin" , Caleb Connolly , Andy Gross , Doug Anderson , Simon Glass , Chen-Yu Tsai , Julius Werner , "Humphreys, Jonathan" , Sumit Garg , "Michal Simek" , , , , , Subject: [PATCH RFC v3 2/9] dt-bindings: board: Introduce board-id Date: Wed, 22 May 2024 16:54:23 -0700 Message-ID: <20240522-board-ids-v4-2-a173277987f5@quicinc.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240522162545887-0700.eberman@hu-eberman-lv.qualcomm.com> References: <20240522162545887-0700.eberman@hu-eberman-lv.qualcomm.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: DpkhxoH8UqRFLEMMCaRQiDEKebv4G9j2 X-Proofpoint-ORIG-GUID: DpkhxoH8UqRFLEMMCaRQiDEKebv4G9j2 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-05-22_13,2024-05-22_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 spamscore=0 clxscore=1015 mlxlogscore=999 mlxscore=0 bulkscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405010000 definitions=main-2405220166 Device manufcturers frequently ship multiple boards or SKUs under a single softwre package. These software packages ship multiple devicetree blobs and require some mechanims to pick the correct DTB for the boards that use the software package. This patch introduces a common language for adding board identifiers to devicetrees. Signed-off-by: Elliot Berman --- .../devicetree/bindings/board/board-id.yaml | 71 ++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/Documentation/devicetree/bindings/board/board-id.yaml b/Documentation/devicetree/bindings/board/board-id.yaml new file mode 100644 index 000000000000..894c1e310cbd --- /dev/null +++ b/Documentation/devicetree/bindings/board/board-id.yaml @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/board/board-id.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Board identifiers +description: | + This node contains a list of identifier values for the board(s) supported by + this devicetree. Identifier values are either N-tuples of integers or a + string. The number of items for an N-tuple identifer is determined by the + property name. String identifiers must be suffixed with "-string". + + Every identifier in the devicetree must have a matching value from the board + to be considered a valid devicetree for the board. In other words: if + multiple identifiers are present in the board-id and one identifier doesn't + match against the board, then the devicetree is not applicable. Note this is + not the case where the the board can provide more identifiers than the + devicetree describes: those additional identifers can be ignored. + + Identifiers in the devicetree can describe multiple possible valid values, + such as revision 1 and revision 2. + +maintainers: + - Elliot Berman + +properties: + $nodename: + const: '/' + board-id: + type: object + patternProperties: + "^.*(?; + #size-cells = <1>; + compatible = "example"; + board-id { + // this works with any boards where: + // some-hw-id = 1, other-hw-id = 1, some-id-string = "cat" + // some-hw-id = 1, other-hw-id = 1, some-id-string = "kitten" + // some-hw-id = 1, other-hw-id = 2, some-id-string = "cat" + // some-hw-id = 1, other-hw-id = 2, some-id-string = "kitten" + some-hw-id = <1>; // some-hw-id must be "1" + other-hw-id = <1>, <2>; // other-hw-id must be "1" or "2" + some-id-string = "cat", "kitten"; // some-id-string must be "cat" or "kitten" + }; + }; + +additionalProperties: true