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648d1382d4
Introduce a binding for the Hi3660 mailbox controller, the mailbox is used within application processor (AP), communication processor (CP), HIFI and MCU, etc. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
52 lines
1.4 KiB
Plaintext
52 lines
1.4 KiB
Plaintext
Hisilicon Hi3660 Mailbox Controller
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Hisilicon Hi3660 mailbox controller supports up to 32 channels. Messages
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are passed between processors, including application & communication
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processors, MCU, HIFI, etc. Each channel is unidirectional and accessed
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by using MMIO registers; it supports maximum to 8 words message.
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Controller
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----------
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Required properties:
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- compatible: : Shall be "hisilicon,hi3660-mbox"
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- reg: : Offset and length of the device's register set
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- #mbox-cells: : Must be 3
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<&phandle channel dst_irq ack_irq>
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phandle : Label name of controller
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channel : Channel number
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dst_irq : Remote interrupt vector
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ack_irq : Local interrupt vector
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- interrupts: : Contains the two IRQ lines for mailbox.
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Example:
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mailbox: mailbox@e896b000 {
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compatible = "hisilicon,hi3660-mbox";
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reg = <0x0 0xe896b000 0x0 0x1000>;
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interrupts = <0x0 0xc0 0x4>,
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<0x0 0xc1 0x4>;
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#mbox-cells = <3>;
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};
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Client
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------
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Required properties:
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- compatible : See the client docs
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- mboxes : Standard property to specify a Mailbox (See ./mailbox.txt)
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Cells must match 'mbox-cells' (See Controller docs above)
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Optional properties
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- mbox-names : Name given to channels seen in the 'mboxes' property.
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Example:
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stub_clock: stub_clock@e896b500 {
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compatible = "hisilicon,hi3660-stub-clk";
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reg = <0x0 0xe896b500 0x0 0x0100>;
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#clock-cells = <1>;
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mboxes = <&mailbox 13 3 0>;
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};
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