| # SPDX-License-Identifier: GPL-2.0 |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/mfd/aspeed,ast2x00-scu.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Aspeed System Control Unit |
| |
| description: |
| The Aspeed System Control Unit manages the global behaviour of the SoC, |
| configuring elements such as clocks, pinmux, and reset. |
| In AST2700 SOC which has two soc connection, each soc have its own scu |
| register control, ast2700-scu0 for soc0, ast2700-scu1 for soc1. |
| |
| maintainers: |
| - Joel Stanley <joel@jms.id.au> |
| - Andrew Jeffery <andrew@aj.id.au> |
| |
| properties: |
| compatible: |
| items: |
| - enum: |
| - aspeed,ast2400-scu |
| - aspeed,ast2500-scu |
| - aspeed,ast2600-scu |
| - aspeed,ast2700-scu0 |
| - aspeed,ast2700-scu1 |
| - const: syscon |
| - const: simple-mfd |
| |
| reg: |
| maxItems: 1 |
| |
| ranges: true |
| |
| '#address-cells': |
| minimum: 1 |
| maximum: 2 |
| |
| '#size-cells': |
| const: 1 |
| |
| '#clock-cells': |
| const: 1 |
| |
| '#reset-cells': |
| const: 1 |
| |
| patternProperties: |
| '^p2a-control@[0-9a-f]+$': |
| description: > |
| PCI-to-AHB Bridge Control |
| |
| The bridge is available on platforms with the VGA enabled on the Aspeed |
| device. In this case, the host has access to a 64KiB window into all of |
| the BMC's memory. The BMC can disable this bridge. If the bridge is |
| enabled, the host has read access to all the regions of memory, however |
| the host only has read and write access depending on a register |
| controlled by the BMC. |
| type: object |
| additionalProperties: false |
| |
| properties: |
| compatible: |
| enum: |
| - aspeed,ast2400-p2a-ctrl |
| - aspeed,ast2500-p2a-ctrl |
| reg: |
| maxItems: 1 |
| |
| memory-region: |
| maxItems: 1 |
| description: |
| A reserved_memory region to be used for the PCI to AHB mapping |
| |
| required: |
| - compatible |
| - reg |
| |
| '^pinctrl(@[0-9a-f]+)?$': |
| type: object |
| additionalProperties: true |
| properties: |
| compatible: |
| contains: |
| enum: |
| - aspeed,ast2400-pinctrl |
| - aspeed,ast2500-pinctrl |
| - aspeed,ast2600-pinctrl |
| |
| required: |
| - compatible |
| |
| '^interrupt-controller@[0-9a-f]+$': |
| type: object |
| additionalProperties: true |
| properties: |
| compatible: |
| contains: |
| enum: |
| - aspeed,ast2500-scu-ic |
| - aspeed,ast2600-scu-ic0 |
| - aspeed,ast2600-scu-ic1 |
| - aspeed,ast2700-scu-ic0 |
| - aspeed,ast2700-scu-ic1 |
| - aspeed,ast2700-scu-ic2 |
| - aspeed,ast2700-scu-ic3 |
| |
| '^silicon-id@[0-9a-f]+$': |
| description: Unique hardware silicon identifiers within the SoC |
| type: object |
| additionalProperties: false |
| |
| properties: |
| compatible: |
| items: |
| - enum: |
| - aspeed,ast2400-silicon-id |
| - aspeed,ast2500-silicon-id |
| - aspeed,ast2600-silicon-id |
| - aspeed,ast2700-silicon-id |
| - const: aspeed,silicon-id |
| |
| reg: |
| description: |
| The reg should be the unique silicon id register, and not backwards |
| compatible one in eg. the 2600. |
| minItems: 1 |
| items: |
| - description: silicon id information registers |
| - description: unique chip id registers |
| |
| '^smp-memram@[0-9a-f]+$': |
| description: Memory region used for the AST2600's custom SMP bringup protocol |
| type: object |
| additionalProperties: false |
| |
| properties: |
| compatible: |
| const: aspeed,ast2600-smpmem |
| |
| reg: |
| description: The SMP memory region |
| maxItems: 1 |
| |
| required: |
| - compatible |
| - reg |
| |
| required: |
| - compatible |
| - reg |
| - ranges |
| - '#address-cells' |
| - '#size-cells' |
| - '#clock-cells' |
| - '#reset-cells' |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| syscon@1e6e2000 { |
| compatible = "aspeed,ast2400-scu", "syscon", "simple-mfd"; |
| reg = <0x1e6e2000 0x1a8>; |
| #clock-cells = <1>; |
| #reset-cells = <1>; |
| |
| #address-cells = <1>; |
| #size-cells = <1>; |
| ranges = <0x0 0x1e6e2000 0x1000>; |
| |
| p2a-control@2c { |
| compatible = "aspeed,ast2400-p2a-ctrl"; |
| reg = <0x2c 0x4>; |
| }; |
| |
| silicon-id@7c { |
| compatible = "aspeed,ast2500-silicon-id", "aspeed,silicon-id"; |
| reg = <0x7c 0x4>, <0x150 0x8>; |
| }; |
| }; |
| ... |
