add dts config

hc

2023-12-06 08f87f769b595151be1afeff53e144f543faa614

 kernel/Documentation/devicetree/bindings/mailbox/rockchip-mailbox.txt
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@@ -19,6 +19,7 @@
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 Optional properties :
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+ - wakeup-source: Mailbox irq can be used as a wakeup source.
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  - rockchip,txpoll-period-ms: TX Done polling interval in milliseconds.
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 Example: