[PATCH 7/9] dt-bindings: phy: Add dt bindings for ZynqMP PHY

[Jolly Shah]

This patch adds the document describing dt bindings for ZynqMP
PHY. ZynqMP SOC has a High Speed Processing System Gigabit
Transceiver which provides PHY capabilties to USB, SATA,
PCIE, Display Port and Ehernet SGMII controllers.

Signed-off-by: Anurag Kumar Vulisha <anuragku@xxxxxxxxxx>
Signed-off-by: Jolly Shah <jollys@xxxxxxxxxx>
Signed-off-by: Michal Simek <michal.simek@xxxxxxxxxx>
---
 .../devicetree/bindings/phy/phy-zynqmp.txt         | 126 +++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/phy-zynqmp.txt

diff --git a/Documentation/devicetree/bindings/phy/phy-zynqmp.txt b/Documentation/devicetree/bindings/phy/phy-zynqmp.txt
new file mode 100644
index 0000000..21cb722
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/phy-zynqmp.txt
@@ -0,0 +1,126 @@
+Xilinx ZynqMP PHY binding
+
+This binding describes a ZynqMP PHY device that is used to control ZynqMP
+High Speed Gigabit Transceiver(GT). ZynqMP PS GTR provides four lanes
+and are used by USB, SATA, PCIE, Display port and Ethernet SGMMI controllers.
+
+Required properties (controller (parent) node):
+- compatible	: Can be "xlnx,zynqmp-psgtr-v1.1" or "xlnx,zynqmp-psgtr"
+		  "xlnx,zynqmp-psgtr-v1.1" has the lpd address mapping removed
+
+- reg           : Address and length of register sets for each device in
+                  "reg-names"
+- reg-names     : The names of the register addresses corresponding to the
+		  registers filled in "reg":
+			- serdes: SERDES block register set
+			- siou: SIOU block register set
+			- lpd: Low power domain peripherals reset control
+
+Required nodes	:  A sub-node is required for each lane the controller
+		   provides.
+
+Required properties (port (child) nodes):
+lane0:
+- #phy-cells	: Should be 4
+		  Cell after port phandle is device type from:
+			- <PHY_TYPE_PCIE 0 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_SATA 0 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_USB3 0 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_DP 1 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_SGMII 0 LANE_NUM FREQUENCY>
+lane1:
+- #phy-cells	: Should be 4
+		  Cell after port phandle is device type from:
+			- <PHY_TYPE_PCIE 1 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_SATA 1 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_USB3 0 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_DP 0 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_SGMII 1 LANE_NUM FREQUENCY>
+lane2:
+- #phy-cells	: Should be 4
+		  Cell after port phandle is device type from:
+			- <PHY_TYPE_PCIE 2 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_SATA 0 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_USB3 0 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_DP 1 LANE_NUM FREQUENC>
+			- <PHY_TYPE_SGMII 2 LANE_NUM FREQUENCY>
+lane3:
+- #phy-cells	: Should be 4
+		  Cell after port phandle is device type from:
+			- <PHY_TYPE_PCIE 3 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_SATA 1 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_USB3 1 LANE_NUM FREQUENCY >
+			- <PHY_TYPE_DP 0 LANE_NUM FREQUENCY>
+			- <PHY_TYPE_SGMII 3 LANE_NUM FREQUENCY>
+
+Note:	LANE_NUM : This determines which lane's reference clock is shared by controller.
+	FREQUENCY: This the clock frequency at which controller wants to operate.
+
+
+Example:
+firmware {
+	zynqmp_firmware: zynqmp-firmware {
+		compatible = "xlnx,zynqmp-firmware";
+		method = "smc";
+
+		serdes: zynqmp_phy@fd400000 {
+			compatible = "xlnx,zynqmp-psgtr";
+			status = "okay";
+			reg = <0x0 0xfd400000 0x0 0x40000>, <0x0 0xfd3d0000 0x0 0x1000>,
+				<0x0 0xff5e0000 0x0 0x1000>;
+			reg-names = "serdes", "siou", "lpd";
+
+			lane0: lane@0 {
+				#phy-cells = <4>;
+			};
+			lane1: lane@1 {
+				#phy-cells = <4>;
+			};
+			lane2: lane@2 {
+				#phy-cells = <4>;
+			};
+			lane3: lane@3 {
+				#phy-cells = <4>;
+			};
+		};
+	};
+};
+
+Specifying phy control of devices
+=================================
+
+Device nodes should specify the configuration required in their "phys"
+property, containing a phandle to the phy port node and a device type.
+
+phys = <PHANDLE CONTROLLER_TYPE CONTROLLER_INSTANCE LANE_NUM LANE_FREQ>;
+
+PHANDLE                 = &lane0 or &lane1 or &lane2 or &lane3
+CONTROLLER_TYPE         = PHY_TYPE_PCIE or PHY_TYPE_SATA or PHY_TYPE_USB
+			  or PHY_TYPE_DP or PHY_TYPE_SGMII
+CONTROLLER_INSTANCE     = Depends on controller type used, can be any of
+				PHY_TYPE_PCIE : 0 or 1 or 2 or 3
+				PHY_TYPE_SATA : 0 or 1
+				PHY_TYPE_USB  : 0 or 1
+				PHY_TYPE_DP   : 0 or 1
+				PHY_TYPE_SGMII: 0 or 1 or 2 or 3
+LANE_NUM                = Depends on which lane clock is used as ref clk, can be
+			  0 or 1 or 2 or 3
+LANE_FREQ               = Frequency that controller can operate, can be any of
+			  19.2Mhz,20Mhz,24Mhz,26Mhz,27Mhz,28.4Mhz,40Mhz,52Mhz,
+			  100Mhz,108Mhz,125Mhz,135Mhz,150Mhz
+
+Example:
+
+#include <dt-bindings/phy/phy.h>
+
+	usb@fe200000 {
+		...
+		phys	  = <&lane2 PHY_TYPE_USB3 0 2 2600000>;
+		...
+	};
+
+	ahci@fd0c0000 {
+		...
+		phys	  = <&lane3 PHY_TYPE_SATA 1 1 125000000>;
+		...
+	};
-- 
2.7.4