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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/ipmi/aspeed,ast2400-kcs-bmc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ASPEED BMC KCS Devices
maintainers:
- Andrew Jeffery <andrew@aj.id.au>
description: |
The Aspeed BMC SoCs typically use the Keyboard-Controller-Style (KCS)
interfaces on the LPC bus for in-band IPMI communication with their host.
properties:
compatible:
oneOf:
- description: Channel ID derived from reg
items:
enum:
- aspeed,ast2400-kcs-bmc-v2
- aspeed,ast2500-kcs-bmc-v2
- aspeed,ast2600-kcs-bmc
- description: Old-style with explicit channel ID, no reg
deprecated: true
items:
enum:
- aspeed,ast2400-kcs-bmc
- aspeed,ast2500-kcs-bmc
interrupts:
maxItems: 1
reg:
# maxItems: 3
items:
- description: IDR register
- description: ODR register
- description: STR register
aspeed,lpc-io-reg:
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 1
maxItems: 2
description: |
The host CPU LPC IO data and status addresses for the device. For most
channels the status address is derived from the data address, but the
status address may be optionally provided.
aspeed,lpc-interrupts:
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 2
maxItems: 2
description: |
A 2-cell property expressing the LPC SerIRQ number and the interrupt
level/sense encoding (specified in the standard fashion).
Note that the generated interrupt is issued from the BMC to the host, and
thus the target interrupt controller is not captured by the BMC's
devicetree.
kcs_chan:
deprecated: true
$ref: /schemas/types.yaml#/definitions/uint32
description: The LPC channel number in the controller
kcs_addr:
deprecated: true
$ref: /schemas/types.yaml#/definitions/uint32
description: The host CPU IO map address
required:
- compatible
- interrupts
additionalProperties: false
allOf:
- if:
properties:
compatible:
contains:
enum:
- aspeed,ast2400-kcs-bmc
- aspeed,ast2500-kcs-bmc
then:
required:
- kcs_chan
- kcs_addr
else:
required:
- reg
- aspeed,lpc-io-reg
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
kcs3: kcs@24 {
compatible = "aspeed,ast2600-kcs-bmc";
reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
aspeed,lpc-io-reg = <0xca2>;
aspeed,lpc-interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
interrupts = <8>;
};
|
