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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/ata/baikal,bt1-ahci.yaml
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# 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/ata/baikal,bt1-ahci.yaml#

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$schema: http://devicetree.org/meta-schemas/core.yaml#

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title: Baikal-T1 SoC AHCI SATA controller

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maintainers:

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  - Serge Semin <fancer.lancer@gmail.com>

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description:

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  AHCI SATA controller embedded into the Baikal-T1 SoC is based on the

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  DWC AHCI SATA v4.10a IP-core.

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allOf:

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  - $ref: snps,dwc-ahci-common.yaml#

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properties:

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  compatible:

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    const: baikal,bt1-ahci

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  clocks:

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    items:

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      - description: Peripheral APB bus clock

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      - description: Application AXI BIU clock

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      - description: SATA Ports reference clock

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  clock-names:

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    items:

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      - const: pclk

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      - const: aclk

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      - const: ref

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  resets:

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    items:

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      - description: Application AXI BIU domain reset

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      - description: SATA Ports clock domain reset

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  reset-names:

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    items:

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      - const: arst

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      - const: ref

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  ports-implemented:

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    maximum: 0x3

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patternProperties:

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  "^sata-port@[0-1]$":

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    $ref: /schemas/ata/snps,dwc-ahci-common.yaml#/$defs/dwc-ahci-port

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    properties:

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      reg:

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        minimum: 0

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        maximum: 1

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      snps,tx-ts-max:

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        $ref: /schemas/types.yaml#/definitions/uint32

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        description:

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          Due to having AXI3 bus interface utilized the maximum Tx DMA

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          transaction size can't exceed 16 beats (AxLEN[3:0]).

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        enum: [ 1, 2, 4, 8, 16 ]

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      snps,rx-ts-max:

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        $ref: /schemas/types.yaml#/definitions/uint32

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        description:

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          Due to having AXI3 bus interface utilized the maximum Rx DMA

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          transaction size can't exceed 16 beats (AxLEN[3:0]).

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        enum: [ 1, 2, 4, 8, 16 ]

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    unevaluatedProperties: false

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required:

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  - compatible

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  - reg

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  - interrupts

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  - clocks

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  - clock-names

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  - resets

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unevaluatedProperties: false

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examples:

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  - |

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    sata@1f050000 {

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      compatible = "baikal,bt1-ahci";

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      reg = <0x1f050000 0x2000>;

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      #address-cells = <1>;

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      #size-cells = <0>;

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      interrupts = <0 64 4>;

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      clocks = <&ccu_sys 1>, <&ccu_axi 2>, <&sata_ref_clk>;

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      clock-names = "pclk", "aclk", "ref";

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      resets = <&ccu_axi 2>, <&ccu_sys 0>;

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      reset-names = "arst", "ref";

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      ports-implemented = <0x3>;

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      sata-port@0 {

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        reg = <0>;

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        snps,tx-ts-max = <4>;

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        snps,rx-ts-max = <4>;

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      };

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      sata-port@1 {

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        reg = <1>;

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        snps,tx-ts-max = <4>;

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        snps,rx-ts-max = <4>;

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      };

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    };

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...

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