Document the new compatible for Hisilicon mailbox driver.
Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>
---
.../devicetree/bindings/mailbox/hisi-mailbox.txt | 57 ++++++++++++++++++++++
1 file changed, 57 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mailbox/hisi-mailbox.txt
diff --git a/Documentation/devicetree/bindings/mailbox/hisi-mailbox.txt b/Documentation/devicetree/bindings/mailbox/hisi-mailbox.txt
new file mode 100644
index 0000000..898823d
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/hisi-mailbox.txt
@@ -0,0 +1,57 @@
+Hisilicon Mailbox Driver
+========================
+
+The Hisilicon 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. Should be 1.
+- interrupts: Contains the interrupt information for the mailbox
+ device. The format is dependent on which interrupt
+ controller the SoCs use.
+
+Example:
+--------
+
+ mailbox: mailbox@F7510000 {
+ #mbox-cells = <1>;
+ compatible = "hisilicon,hi6220-mbox";
+ reg = <0x0 0xF7510000 0x0 0x1000>, /* IPC_S */
+ <0x0 0x06DFF800 0x0 0x0800>; /* Mailbox */
+ interrupt-parent = <&gic>;
+ interrupts = <0 94 4>;
+ };
+
+
+Mailbox client
+===============
+
+"mboxes" and the optional "mbox-names" (please see
+Documentation/devicetree/bindings/mailbox/mailbox.txt for details). Each value
+of the mboxes property should contain a phandle to the mailbox controller
+device node and second argument is the channel index. It must be 0 (hardware
+support only one channel). The equivalent "mbox-names" property value can be
+used to give a name to the communication channel to be used by the client user.
+
+Example:
+--------
+
+ stub_clock: stub_clock {
+ compatible = "hisilicon,hi6220-stub-clk";
+ hisilicon,hi6220-clk-sram = <&sram>;
+ #clock-cells = <1>;
+ mbox-names = "mbox-tx";
+ mboxes = <&mailbox 1>;
+ };
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
