[PATCH 2/3] dt-bindings: mailbox: Add Amlogic Meson MHU Bindings
From: Neil Armstrong <hidden>
Date: 2016-08-09 08:53:15
Also in:
linux-arm-kernel, linux-devicetree, lkml
Subsystem:
mailbox api, open firmware and flattened device tree bindings, the rest · Maintainers:
Jassi Brar, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Signed-off-by: Neil Armstrong <redacted> --- .../devicetree/bindings/mailbox/meson-mhu.txt | 33 ++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/meson-mhu.txt
diff --git a/Documentation/devicetree/bindings/mailbox/meson-mhu.txt b/Documentation/devicetree/bindings/mailbox/meson-mhu.txt
new file mode 100644
index 0000000..4a80b44
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/meson-mhu.txt@@ -0,0 +1,33 @@ +Amlogic Meson MHU Mailbox Driver +================================ + +The Amlogic's Meson SoCs Message-Handling-Unit (MHU) is a mailbox controller +that has 2 independent channels/links to communicate with remote processor(s). +MHU links are hardwired on a platform. A link raises interrupt for any +received data. However, there is no specified way of knowing if the sent +data has been read by the remote. This driver assumes the sender polls +STAT register and the remote clears it after having read the data. + +Mailbox Device Node: +==================== + +Required properties: +-------------------- +- compatible: Shall be "amlogic,meson-gxbb-mhu" +- reg: Contains the mailbox register address range (base + address and length) +- #mbox-cells Shall be 1 - the index of the channel needed. +- interrupts: Contains the interrupt information corresponding to + each of the 2 links of MHU. + +Example: +-------- + + mailbox: mailbox at c883c400 { + #mbox-cells = <1>; + compatible = "amlogic,meson-gxbb-mhu"; + reg = <0 0xc883c400 0 0x4c>; + interrupts = <0 209 IRQ_TYPE_EDGE_RISING>, + <0 210 IRQ_TYPE_EDGE_RISING>; + #mbox-cells = <1>; + };
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2.7.0