linux-kernel - [PATCH v2 1/2] dt-bindings: power: reset: xilinx: Add bindings for ipi mailbox

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Date:   Fri, 22 Nov 2019 00:44:17 -0800
From:   Rajan Vaja <rajan.vaja@...inx.com>
To:     sre@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        michal.simek@...inx.com, jollys@...inx.com, tejas.patel@...inx.com
Cc:     linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Rajan Vaja <rajan.vaja@...inx.com>
Subject: [PATCH v2 1/2] dt-bindings: power: reset: xilinx: Add bindings for ipi mailbox

Add IPI mailbox property and its example in xilinx zynqmp-power
documentation.

Signed-off-by: Rajan Vaja <rajan.vaja@...inx.com>
---
Changes in v2:
 - Correct order of tx and rx in mbox-names property.
 - Add interrupts property in example.
---
 .../bindings/power/reset/xlnx,zynqmp-power.txt     | 43 ++++++++++++++++++++--
 1 file changed, 40 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/reset/xlnx,zynqmp-power.txt b/Documentation/devicetree/bindings/power/reset/xlnx,zynqmp-power.txt
index d366f1e..0d74987 100644
--- a/Documentation/devicetree/bindings/power/reset/xlnx,zynqmp-power.txt
+++ b/Documentation/devicetree/bindings/power/reset/xlnx,zynqmp-power.txt
@@ -8,18 +8,55 @@ Required properties:
  - compatible:		Must contain:	"xlnx,zynqmp-power"
  - interrupts:		Interrupt specifier
 
--------
-Example
--------
+Optional properties:
+ - mbox-names	: Name given to channels seen in the 'mboxes' property.
+		  "tx" - Mailbox corresponding to transmit path
+		  "rx" - Mailbox corresponding to receive path
+ - mboxes	: Standard property to specify a Mailbox. Each value of
+		  the mboxes property should contain a phandle to the
+		  mailbox controller device node and an args specifier
+		  that will be the phandle to the intended sub-mailbox
+		  child node to be used for communication. See
+		  Documentation/devicetree/bindings/mailbox/mailbox.txt
+		  for more details about the generic mailbox controller
+		  and client driver bindings. Also see
+		  Documentation/devicetree/bindings/mailbox/ \
+		  xlnx,zynqmp-ipi-mailbox.txt for typical controller that
+		  is used to communicate with this System controllers.
+
+--------
+Examples
+--------
+
+Example with interrupt method:
+
+firmware {
+	zynqmp_firmware: zynqmp-firmware {
+		compatible = "xlnx,zynqmp-firmware";
+		method = "smc";
+
+		zynqmp_power: zynqmp-power {
+			compatible = "xlnx,zynqmp-power";
+			interrupts = <0 35 4>;
+		};
+	};
+};
+
+Example with IPI mailbox method:
 
 firmware {
+
 	zynqmp_firmware: zynqmp-firmware {
 		compatible = "xlnx,zynqmp-firmware";
 		method = "smc";
 
 		zynqmp_power: zynqmp-power {
 			compatible = "xlnx,zynqmp-power";
+			interrupt-parent = <&gic>;
 			interrupts = <0 35 4>;
+			mboxes = <&ipi_mailbox_pmu0 0>,
+				 <&ipi_mailbox_pmu0 1>;
+			mbox-names = "tx", "rx";
 		};
 	};
 };
-- 
2.7.4