From: Lee Jones Date: Fri, 16 Oct 2015 07:21:27 +0000 (+0100) Subject: mailbox: dt: Supply bindings for ST's Mailbox IP X-Git-Tag: firefly_0821_release~176^2~767^2~7 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b5f6737685d54c079db7bec891128de8d07d1c51;p=firefly-linux-kernel-4.4.55.git mailbox: dt: Supply bindings for ST's Mailbox IP Signed-off-by: Lee Jones Signed-off-by: Jassi Brar --- diff --git a/Documentation/devicetree/bindings/mailbox/sti-mailbox.txt b/Documentation/devicetree/bindings/mailbox/sti-mailbox.txt new file mode 100644 index 000000000000..b61eec920359 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/sti-mailbox.txt @@ -0,0 +1,51 @@ +ST Microelectronics Mailbox Driver + +Each ST Mailbox IP currently consists of 4 instances of 32 channels. Messages +are passed between Application and Remote processors using shared memory. + +Controller +---------- + +Required properties: +- compatible : Should be "st,stih407-mailbox" +- reg : Offset and length of the device's register set +- mbox-name : Name of the mailbox +- #mbox-cells: : Must be 2 + <&phandle instance channel direction> + phandle : Label name of controller + instance : Instance number + channel : Channel number + +Optional properties +- interrupts : Contains the IRQ line for a Rx mailbox + +Example: + +mailbox0: mailbox@0 { + compatible = "st,stih407-mailbox"; + reg = <0x08f00000 0x1000>; + interrupts = ; + #mbox-cells = <2>; + mbox-name = "a9"; +}; + +Client +------ + +Required properties: +- compatible : Many (See the client docs) +- reg : Shared (between Application and Remote) memory address +- mboxes : Standard property to specify a Mailbox (See ./mailbox.txt) + Cells must match 'mbox-cells' (See Controller docs above) + +Optional properties +- mbox-names : Name given to channels seen in the 'mboxes' property. + +Example: + +mailbox_test { + compatible = "mailbox_test"; + reg = <0x[shared_memory_address], [shared_memory_size]>; + mboxes = <&mailbox2 0 1>, <&mailbox0 2 1>; + mbox-names = "tx", "rx"; +};