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

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Message-Id: <1573564851-9275-2-git-send-email-rajan.vaja@xilinx.com>
Date:   Tue, 12 Nov 2019 05:20:50 -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 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>
---
 .../bindings/power/reset/xlnx,zynqmp-power.txt     | 41 ++++++++++++++++++++--
 1 file changed, 38 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..450f3a4 100644
--- a/Documentation/devicetree/bindings/power/reset/xlnx,zynqmp-power.txt
+++ b/Documentation/devicetree/bindings/power/reset/xlnx,zynqmp-power.txt
@@ -8,9 +8,27 @@ 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.
+		  "rx" - Mailbox corresponding to receive path
+		  "tx" - Mailbox corresponding to transmit 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 {
@@ -23,3 +41,20 @@ firmware {
 		};
 	};
 };
+
+Example with IPI mailbox method:
+
+firmware {
+
+	zynqmp_firmware: zynqmp-firmware {
+		compatible = "xlnx,zynqmp-firmware";
+		method = "smc";
+
+		zynqmp_power: zynqmp-power {
+			compatible = "xlnx,zynqmp-power";
+			mboxes = <&ipi_mailbox_pmu0 0>,
+				 <&ipi_mailbox_pmu0 1>;
+			mbox-names = "tx", "rx";
+		};
+	};
+};
-- 
2.7.4