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6b357c149e
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) <robh@kernel.org> Signed-off-by: Ninad Palsule <ninad@linux.ibm.com> Acked-by: Corey Minyard <corey@minyard.net> Link: https://patch.msgid.link/20250204194115.3899174-2-ninad@linux.ibm.com Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
57 lines
1.5 KiB
YAML
57 lines
1.5 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/ipmi/ipmb-dev.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: The Intelligent Platform Management Bus(IPMB) Device
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description: |
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The IPMB is an I2C bus which provides interconnection between a Baseboard
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Management Controller(BMC) and chassis electronics. The BMC sends IPMI
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requests to intelligent controllers like Satellite Management Controller(MC)
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devices via IPMB and the device sends responses back to the BMC.
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This device uses an I2C slave device to send and receive IPMB messages,
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either on a BMC or other MC. A miscellaneous device provices a user space
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program to communicate with the kernel and the backend device. Some IPMB
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devices only support the I2C protocol and not the SMB protocol.
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IPMB communications protocol Specification V1.0
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https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmp-spec-v1.0.pdf
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maintainers:
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- Ninad Palsule <ninad@linux.ibm.com>
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properties:
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compatible:
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enum:
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- ipmb-dev
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reg:
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maxItems: 1
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i2c-protocol:
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description:
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Use I2C block transfer instead of SMBUS block transfer.
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type: boolean
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/i2c/i2c.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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ipmb-dev@10 {
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compatible = "ipmb-dev";
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reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
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i2c-protocol;
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};
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};
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