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: Subbaraya Sundeep Bhatta <sbhatta@xxxxxxxxxx>
---
.../devicetree/bindings/phy/phy-zynqmp.txt | 104 +++++++++++++++++++++
1 file changed, 104 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..ec0d3de
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/phy-zynqmp.txt
@@ -0,0 +1,104 @@
+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 : Should be "xlnx,zynqmp-psgtr"
+
+- 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
+ - fpd: Full power domain peripherals reset control
+
+-xlnx,tx_termination_fix: Include fix for a functional issue in the GT. The TX
+ termination resistance can be out of spec due to a
+ bug in the calibration logic. This issue will be fixed
+ in silicon in future versions.
+
+Required nodes : A sub-node is required for each lane the controller
+ provides. These nodes are translated by the driver's
+ .xlate() function.
+
+Required properties (port (child) nodes):
+lane0:
+- #phy-cells : Should be 1
+ Cell after port phandle is device type from:
+ - XPSGTR_TYPE_PCIE_0
+ - XPSGTR_TYPE_SATA_0
+ - XPSGTR_TYPE_USB0
+ - XPSGTR_TYPE_DP_1
+ - XPSGTR_TYPE_SGMII0
+lane1:
+- #phy-cells : Should be 1
+ Cell after port phandle is device type from:
+ - XPSGTR_TYPE_PCIE_1
+ - XPSGTR_TYPE_SATA_1
+ - XPSGTR_TYPE_USB0
+ - XPSGTR_TYPE_DP_0
+ - XPSGTR_TYPE_SGMII1
+lane2:
+- #phy-cells : Should be 1
+ Cell after port phandle is device type from:
+ - XPSGTR_TYPE_PCIE_2
+ - XPSGTR_TYPE_SATA_0
+ - XPSGTR_TYPE_USB0
+ - XPSGTR_TYPE_DP_1
+ - XPSGTR_TYPE_SGMII2
+lane3:
+- #phy-cells : Should be 1
+ Cell after port phandle is device type from:
+ - XPSGTR_TYPE_PCIE_3
+ - XPSGTR_TYPE_SATA_1
+ - XPSGTR_TYPE_USB1
+ - XPSGTR_TYPE_DP_0
+ - XPSGTR_TYPE_SGMII3
+
+Example:
+ zynqmp_phy@fd400000 {
+ compatible = "xlnx,zynqmp-psgtr";
+ status = "okay";
+ reg = <0x0 0xfd400000 0x40000>, <0x0 0xfd3d0000 0x1000>,
+ <0x0 0xfd1a0000 0x1000>, <0x0 0xff5e0000 0x1000>;
+ reg-names = "serdes", "siou", "fpd", "lpd";
+
+ lane0: lane@0 {
+ #phy-cells = <1>;
+ };
+ lane1: lane@1 {
+ #phy-cells = <1>;
+ };
+ lane2: lane@2 {
+ #phy-cells = <1>;
+ };
+ lane3: lane@3 {
+ #phy-cells = <1>;
+ };
+ };
+
+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.
+
+Example:
+
+#include <dt-bindings/phy/phy.h>
+
+ usb@fe200000 {
+ ...
+ phys = <&lane2 XPSGTR_TYPE_USB0>;
+ ...
+ };
+
+ ahci@fd0c0000 {
+ ...
+ phys = <&lane3 XPSGTR_TYPE_SATA_0>;
+ ...
+ };
--
2.1.2
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