Commit 06006ad2 authored by Zong Li's avatar Zong Li Committed by Vinod Koul
Browse files

dt-bindings: dma-engine: sifive,fu540: Add dma-channels property and modify compatible 



Add dma-channels property, then we can determine how many channels there
by device tree, rather than statically defining it in PDMA driver.
In addition, we also modify the compatible for PDMA versioning scheme.

Signed-off-by: default avatarZong Li <zong.li@sifive.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Suggested-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Acked-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
Acked-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: default avatarBin Meng <bmeng.cn@gmail.com>
Link: https://lore.kernel.org/r/7cc9a7b5f7e6c28fc9eb172c441b5aed2159b8a0.1648461096.git.zong.li@sifive.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 31231092

Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml

+17 −2
Original line number Diff line number Diff line
@@ -28,7 +28,15 @@ allOf: 
properties:

  compatible:

    items:

      - const: sifive,fu540-c000-pdma

      - enum:

          - sifive,fu540-c000-pdma

      - const: sifive,pdma0

    description:

      Should be "sifive,<chip>-pdma" and "sifive,pdma<version>".

      Supported compatible strings are -

      "sifive,fu540-c000-pdma" for the SiFive PDMA v0 as integrated onto the

      SiFive FU540 chip resp and "sifive,pdma0" for the SiFive PDMA v0 IP block

      with no chip integration tweaks.



  reg:

    maxItems: 1
@@ -37,6 +45,12 @@ properties: 
    minItems: 1

    maxItems: 8



  dma-channels:

    description: For backwards-compatibility, the default value is 4

    minimum: 1

    maximum: 4

    default: 4



  '#dma-cells':

    const: 1
@@ -50,8 +64,9 @@ unevaluatedProperties: false 
examples:

  - |

    dma-controller@3000000 {

      compatible = "sifive,fu540-c000-pdma";

      compatible = "sifive,fu540-c000-pdma", "sifive,pdma0";

      reg = <0x3000000 0x8000>;

      dma-channels = <4>;

      interrupts = <23>, <24>, <25>, <26>, <27>, <28>, <29>, <30>;

      #dma-cells = <1>;

    };