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Mon, 3 Feb 2025 14:44:26 +0000 (GMT) From: Ninad Palsule To: brgl@bgdev.pl, linus.walleij@linaro.org, minyard@acm.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, openipmi-developer@lists.sourceforge.net, netdev@vger.kernel.org, joel@jms.id.au, andrew@codeconstruct.com.au, devicetree@vger.kernel.org, eajames@linux.ibm.com, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org Cc: Ninad Palsule Subject: [PATCH v7 1/9] bindings: ipmi: Add binding for IPMB device intf Date: Mon, 3 Feb 2025 08:44:11 -0600 Message-ID: <20250203144422.269948-2-ninad@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250203144422.269948-1-ninad@linux.ibm.com> References: <20250203144422.269948-1-ninad@linux.ibm.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 6JVZS2zuW-JB1O4d1lC0kkUwKg2dNIDO X-Proofpoint-ORIG-GUID: HnclquqNtgwvhoRqkBQeEIk0lcwIssUz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-03_06,2025-01-31_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 mlxlogscore=999 bulkscore=0 mlxscore=0 suspectscore=0 priorityscore=1501 phishscore=0 impostorscore=0 spamscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2501170000 definitions=main-2502030106 Add device tree binding document for the IPMB device interface. This device is already in use in both driver and .dts files. Reviewed-by: Rob Herring (Arm) Signed-off-by: Ninad Palsule --- .../devicetree/bindings/ipmi/ipmb-dev.yaml | 56 +++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml diff --git a/Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml b/Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml new file mode 100644 index 000000000000..8b0d71901195 --- /dev/null +++ b/Documentation/devicetree/bindings/ipmi/ipmb-dev.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/ipmi/ipmb-dev.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: The Intelligent Platform Management Bus(IPMB) Device + +description: | + The IPMB is an I2C bus which provides interconnection between a Baseboard + Management Controller(BMC) and chassis electronics. The BMC sends IPMI + requests to intelligent controllers like Satellite Management Controller(MC) + devices via IPMB and the device sends responses back to the BMC. + This device uses an I2C slave device to send and receive IPMB messages, + either on a BMC or other MC. A miscellaneous device provices a user space + program to communicate with the kernel and the backend device. Some IPMB + devices only support the I2C protocol and not the SMB protocol. + + IPMB communications protocol Specification V1.0 + https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmp-spec-v1.0.pdf + +maintainers: + - Ninad Palsule + +properties: + compatible: + enum: + - ipmb-dev + + reg: + maxItems: 1 + + i2c-protocol: + description: + Use I2C block transfer instead of SMBUS block transfer. + type: boolean + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + #include + i2c { + #address-cells = <1>; + #size-cells = <0>; + + ipmb-dev@10 { + compatible = "ipmb-dev"; + reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>; + i2c-protocol; + }; + };