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    Subject[PATCH v4 04/12] dt-binding: gce: add binding for gce subsys property
    Date
    cmdq driver provide a function that get the relationship
    of sub system number from device node for client.
    add specification for #subsys-cells, mediatek,gce-subsys.

    Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
    ---
    .../devicetree/bindings/mailbox/mtk-gce.txt | 15 ++++++++++++---
    1 file changed, 12 insertions(+), 3 deletions(-)

    diff --git a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
    index 2f175d6b296d..755b30fd6041 100644
    --- a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
    +++ b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
    @@ -26,13 +26,20 @@ Required properties:
    phandle: Label name of a gce node.
    event_number: the event number defined in 'dt-bindings/gce/mt8173-gce.h'
    or 'dt-binding/gce/mt8183-gce.h'.
    +- #subsys-cells: Should be 3.
    + <&phandle subsys_number start_offset size>
    + phandle: Label name of a gce node.
    + subsys_number: specify the sub-system id which is corresponding
    + to the register address.
    + start_offset: the start offset of register address that GCE can access.
    + size: the total size of register address that GCE can access.

    Required properties for a client device:
    - mboxes: Client use mailbox to communicate with GCE, it should have this
    property and list of phandle, mailbox specifiers.
    -- mediatek,gce-subsys: u32, specify the sub-system id which is corresponding
    - to the register address.
    Optional propertier for a client device:
    +- mediatek,gce-client-reg: u32, specify the sub-system id which is corresponding
    + to the register address.
    - mediatek,gce-event-names: the event name can be defined by user.
    - mediatek,gce-events: u32, the event number defined in
    'dt-bindings/gce/mt8173-gce.h' or 'dt-binding/gce/mt8183-gce.h'.
    @@ -50,6 +57,7 @@ Example:
    clock-names = "gce";
    #mbox-cells = <3>;
    #event-cells = <1>;
    + #subsys-cells = <3>;
    };

    Example for a client device:
    @@ -58,7 +66,8 @@ Example for a client device:
    compatible = "mediatek,mt8173-mmsys";
    mboxes = <&gce 0 CMDQ_THR_PRIO_LOWEST 1>,
    <&gce 1 CMDQ_THR_PRIO_LOWEST 1>;
    - mediatek,gce-subsys = <SUBSYS_1400XXXX>;
    + mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0x3000 0x1000>,
    + <&gce SUBSYS_1401XXXX 0x2000 0x100>;
    mediatek,gce-event-names = "rdma0_sof",
    "rsz0_sof";
    mediatek,gce-events = <&gce CMDQ_EVENT_MDP_RDMA0_SOF>,
    --
    2.18.0
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