linux-kernel - [PATCH v2 2/3] dt-bindings: nvmem: Add bindings for ZynqMP nvmem driver

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Message-ID: <20190204070951.6933-3-nava.manne@xilinx.com>
Date:   Mon, 4 Feb 2019 12:39:50 +0530
From:   Nava kishore Manne <nava.manne@...inx.com>
To:     <srinivas.kandagatla@...aro.org>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <michal.simek@...inx.com>,
        <jollys@...inx.com>, <rajanv@...inx.com>, <nava.manne@...inx.com>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/3] dt-bindings: nvmem: Add bindings for ZynqMP nvmem driver

Add documentation to describe Xilinx ZynqMP nvmem driver
bindings.

Signed-off-by: Nava kishore Manne <nava.manne@...inx.com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
 .../bindings/nvmem/xlnx,zynqmp-nvmem.txt      | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.txt

diff --git a/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.txt b/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.txt
new file mode 100644
index 000000000000..2043c8284f8c
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.txt
@@ -0,0 +1,47 @@
+--------------------------------------------------------------------------
+=  Zynq UltraScale+ MPSoC nvmem firmware driver binding =
+--------------------------------------------------------------------------
+The nvmem_firmware node provides access to the hardware related data
+like soc revision, IDCODE... etc, By using the firmware interface.
+
+Required properties:
+- compatible: should be "xlnx,zynqmp-nvmem-fw"
+
+= Data cells =
+Are child nodes of silicon id, bindings of which as described in
+bindings/nvmem/nvmem.txt
+
+-------
+ Example
+-------
+firmware {
+	zynqmp_firmware: zynqmp-firmware {
+		compatible = "xlnx,zynqmp-firmware";
+		method = "smc";
+
+		nvmem_firmware {
+			compatible = "xlnx,zynqmp-nvmem-fw";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			/* Data cells */
+			soc_revision: soc_revision {
+				reg = <0x0 0x4>;
+			};
+		};
+	};
+};
+
+= Data consumers =
+Are device nodes which consume nvmem data cells.
+
+For example:
+	pcap {
+		...
+
+		nvmem-cells = <&soc_revision>;
+		nvmem-cell-names = "soc_revision";
+
+		...
+	};
+
-- 
2.18.0