add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/mailbox/Kconfig
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@@ -79,6 +79,12 @@
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 	  Please check it that the Soc you use have Mailbox hardware.
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 	  Say Y here if you want to use the Rockchip Mailbox support.
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+config ROCKCHIP_MBOX_DEMO
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+	tristate "Rockchip MBOX Demo"
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+	depends on ROCKCHIP_MBOX
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+	help
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+	  Say y here to enable Rockchip MBOX Demo.
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+
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 config PCC
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 	bool "Platform Communication Channel Driver"
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 	depends on ACPI