On Tue, Feb 02, 2016 at 06:09:39PM +0800, Leo Yan wrote:
> Document DT binding for Hisilicon Hi6220 mailbox driver.
>
> Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>
> ---
> .../bindings/mailbox/hisilicon,hi6220-mailbox.txt | 74 ++++++++++++++++++++++
> 1 file changed, 74 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mailbox/hisilicon,hi6220-mailbox.txt
One nit, otherwise:
Acked-by: Rob Herring <robh@xxxxxxxxxx>
>
> diff --git a/Documentation/devicetree/bindings/mailbox/hisilicon,hi6220-mailbox.txt b/Documentation/devicetree/bindings/mailbox/hisilicon,hi6220-mailbox.txt
> new file mode 100644
> index 0000000..8508c8a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mailbox/hisilicon,hi6220-mailbox.txt
> @@ -0,0 +1,74 @@
> +Hisilicon Hi6220 Mailbox Driver
> +===============================
> +
> +Hisilicon Hi6220 mailbox supports up to 32 channels. Each channel
> +is unidirectional with a maximum message size of 8 words. I/O is
> +performed using register access (there is no DMA) and the cell
> +raises an interrupt when messages are received.
> +
> +Mailbox Device Node:
> +====================
> +
> +Required properties:
> +--------------------
> +- compatible: Shall be "hisilicon,hi6220-mbox"
> +- reg: Contains the mailbox register address range (base
> + address and length); the first item is for IPC
> + registers, the second item is shared buffer for
> + slots.
> +- #mbox-cells: Common mailbox binding property to identify the number
> + of cells required for the mailbox specifier. Must be 3.
> + <&phandle slot_id dst_irq ack_irq>
> + phandle: Label name of mailbox controller
> + slot_id: Slot id used either for TX or RX
> + dst_irq: IRQ identifier index number which used by MCU
> + ack_irq: IRQ identifier index number with generating a
> + TX/RX interrupt to application processor,
> + mailbox driver uses it to acknowledge interrupt
> +- interrupts: Contains the interrupt information for the mailbox
> + device. The format is dependent on which interrupt
> + controller the SoCs use.
> +
> +Optional Properties:
> +--------------------
> +- hi6220,mbox-tx-noirq: Property of MCU firmware's feature, so mailbox driver
> + use this flag to ask MCU to enable "automatic idle
> + flag" mode or IRQ generated mode to acknowledge a TX
> + completion.
> +
> +Example:
> +--------
> +
> + mailbox: mailbox@F7510000 {
use lowercase for hex
> + compatible = "hisilicon,hi6220-mbox";
> + reg = <0x0 0xF7510000 0x0 0x1000>, /* IPC_S */
> + <0x0 0x06DFF800 0x0 0x0800>; /* Mailbox */
and here too.
> + interrupt-parent = <&gic>;
> + interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
> + #mbox-cells = <3>;
> + };
> +
> +
> +Mailbox client
> +===============
> +
> +Required properties:
> +--------------------
> +- compatible: Many (See the client docs).
> +- mboxes: Standard property to specify a Mailbox (See ./mailbox.txt)
> + Cells must match 'mbox-cells' (See Mailbox Device Node above).
> +
> +Optional Properties:
> +--------------------
> +- mbox-names: Name given to channels seen in the 'mboxes' property.
> +
> +Example:
> +--------
> +
> + stub_clock: stub_clock {
> + compatible = "hisilicon,hi6220-stub-clk";
> + hisilicon,hi6220-clk-sram = <&sram>;
> + #clock-cells = <1>;
> + mbox-names = "mbox-tx", "mbox-rx";
> + mboxes = <&mailbox 1 0 11>, <&mailbox 0 1 10>;
> + };
> --
> 1.9.1
>
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