| 1 | |
| 2 | %YAML 1.2
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| 3 | ---
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| 4 | $id: http://devicetree.org/schemas/ipmi/ipmb-dev.yaml#
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| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml#
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| 6 |
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| 7 | title: The Intelligent Platform Management Bus(IPMB) Device
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| 8 |
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| 9 | description: |
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| 10 | The IPMB is an I2C bus which provides interconnection between a Baseboard
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| 11 | Management Controller(BMC) and chassis electronics. The BMC sends IPMI
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| 12 | requests to intelligent controllers like Satellite Management Controller(MC)
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| 13 | devices via IPMB and the device sends responses back to the BMC.
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| 14 | This device uses an I2C slave device to send and receive IPMB messages,
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| 15 | either on a BMC or other MC. A miscellaneous device provices a user space
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| 16 | program to communicate with the kernel and the backend device. Some IPMB
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| 17 | devices only support the I2C protocol and not the SMB protocol.
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| 18 |
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| 19 | IPMB communications protocol Specification V1.0
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| 20 | https://www.intel.com/content/dam/www/public/us/en/documents/product-briefs/ipmp-spec-v1.0.pdf
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| 21 |
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| 22 | maintainers:
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| 23 | - Ninad Palsule <[email protected]>
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| 24 |
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| 25 | properties:
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| 26 | compatible:
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| 27 | enum:
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| 28 | - ipmb-dev
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| 29 |
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| 30 | reg:
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| 31 | maxItems: 1
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| 32 |
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| 33 | i2c-protocol:
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| 34 | description:
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| 35 | Use I2C block transfer instead of SMBUS block transfer.
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| 36 | type: boolean
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| 37 |
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| 38 | required:
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| 39 | - compatible
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| 40 | - reg
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| 41 |
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| 42 | additionalProperties: false
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| 43 |
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| 44 | examples:
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| 45 | - |
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| 46 | #include <dt-bindings/i2c/i2c.h>
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| 47 | i2c {
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| 48 | #address-cells = <1>;
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| 49 | #size-cells = <0>;
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| 50 |
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| 51 | ipmb-dev@10 {
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| 52 | compatible = "ipmb-dev";
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| 53 | reg = <(0x10 | I2C_OWN_SLAVE_ADDRESS)>;
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| 54 | i2c-protocol;
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| 55 | };
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| 56 | };
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