| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/ipmi/aspeed,ast2400-kcs-bmc.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: ASPEED BMC KCS Devices |
| 8 | |
| 9 | maintainers: |
| 10 | - Andrew Jeffery <andrew@aj.id.au> |
| 11 | |
| 12 | description: | |
| 13 | The Aspeed BMC SoCs typically use the Keyboard-Controller-Style (KCS) |
| 14 | interfaces on the LPC bus for in-band IPMI communication with their host. |
| 15 | |
| 16 | properties: |
| 17 | compatible: |
| 18 | oneOf: |
| 19 | - description: Channel ID derived from reg |
| 20 | items: |
| 21 | enum: |
| 22 | - aspeed,ast2400-kcs-bmc-v2 |
| 23 | - aspeed,ast2500-kcs-bmc-v2 |
| 24 | - aspeed,ast2600-kcs-bmc |
| 25 | |
| 26 | - description: Old-style with explicit channel ID, no reg |
| 27 | deprecated: true |
| 28 | items: |
| 29 | enum: |
| 30 | - aspeed,ast2400-kcs-bmc |
| 31 | - aspeed,ast2500-kcs-bmc |
| 32 | |
| 33 | interrupts: |
| 34 | maxItems: 1 |
| 35 | |
| 36 | reg: |
| 37 | # maxItems: 3 |
| 38 | items: |
| 39 | - description: IDR register |
| 40 | - description: ODR register |
| 41 | - description: STR register |
| 42 | |
| 43 | aspeed,lpc-io-reg: |
| 44 | $ref: /schemas/types.yaml#/definitions/uint32-array |
| 45 | minItems: 1 |
| 46 | maxItems: 2 |
| 47 | description: | |
| 48 | The host CPU LPC IO data and status addresses for the device. For most |
| 49 | channels the status address is derived from the data address, but the |
| 50 | status address may be optionally provided. |
| 51 | |
| 52 | aspeed,lpc-interrupts: |
| 53 | $ref: /schemas/types.yaml#/definitions/uint32-array |
| 54 | minItems: 2 |
| 55 | maxItems: 2 |
| 56 | description: | |
| 57 | A 2-cell property expressing the LPC SerIRQ number and the interrupt |
| 58 | level/sense encoding (specified in the standard fashion). |
| 59 | |
| 60 | Note that the generated interrupt is issued from the BMC to the host, and |
| 61 | thus the target interrupt controller is not captured by the BMC's |
| 62 | devicetree. |
| 63 | |
| 64 | kcs_chan: |
| 65 | deprecated: true |
| 66 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 67 | description: The LPC channel number in the controller |
| 68 | |
| 69 | kcs_addr: |
| 70 | deprecated: true |
| 71 | $ref: /schemas/types.yaml#/definitions/uint32 |
| 72 | description: The host CPU IO map address |
| 73 | |
| 74 | required: |
| 75 | - compatible |
| 76 | - interrupts |
| 77 | |
| 78 | additionalProperties: false |
| 79 | |
| 80 | allOf: |
| 81 | - if: |
| 82 | properties: |
| 83 | compatible: |
| 84 | contains: |
| 85 | enum: |
| 86 | - aspeed,ast2400-kcs-bmc |
| 87 | - aspeed,ast2500-kcs-bmc |
| 88 | then: |
| 89 | required: |
| 90 | - kcs_chan |
| 91 | - kcs_addr |
| 92 | else: |
| 93 | required: |
| 94 | - reg |
| 95 | - aspeed,lpc-io-reg |
| 96 | |
| 97 | examples: |
| 98 | - | |
| 99 | #include <dt-bindings/interrupt-controller/irq.h> |
| 100 | kcs3: kcs@24 { |
| 101 | compatible = "aspeed,ast2600-kcs-bmc"; |
| 102 | reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>; |
| 103 | aspeed,lpc-io-reg = <0xca2>; |
| 104 | aspeed,lpc-interrupts = <11 IRQ_TYPE_LEVEL_LOW>; |
| 105 | interrupts = <8>; |
| 106 | }; |