[PATCH 2/3] dt-bindings: mailbox: Add Amlogic Meson MHU Bindings

[PATCH 2/3] dt-bindings: mailbox: Add Amlogic Meson MHU Bindings

[Neil Armstrong]

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 .../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@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>;
+	};
-- 
2.7.0

Re: [PATCH 2/3] dt-bindings: mailbox: Add Amlogic Meson MHU Bindings

[Rob Herring]

On Tue, Aug 09, 2016 at 10:52:16AM +0200, Neil Armstrong wrote:
> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
> ---
>  .../devicetree/bindings/mailbox/meson-mhu.txt      | 33 ++++++++++++++++++++++
>  1 file changed, 33 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mailbox/meson-mhu.txt

Acked-by: Rob Herring <robh@kernel.org>

[PATCH 3/3] ARM64: dts: meson-gxbb: Add Meson MHU Node

[Neil Armstrong]

Signed-off-by: Neil Armstrong <narmstrong-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
---
 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
index e502c24..dfd2ff7 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
@@ -321,6 +321,14 @@
 				#clock-cells = <1>;
 				reg = <0x0 0x0 0x0 0x3db>;
 			};
+
+			mailbox: mailbox@400 {
+				compatible = "amlogic,meson-gxbb-mhu";
+				reg = <0 0x400 0 0x4c>;
+				interrupts = <0 209 IRQ_TYPE_EDGE_RISING>,
+					     <0 210 IRQ_TYPE_EDGE_RISING>;
+				#mbox-cells = <1>;
+			};
 		};
 
 		apb: apb@d0000000 {
-- 
2.7.0

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