Added device tree support for TI's Keystone USB driver and updated the
Documentation with device tree binding information.
On Keystone II platforms, we use no-op phy driver.
Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
Signed-off-by: WingMan Kwok <w-kwok2@xxxxxx>
---
.../devicetree/bindings/usb/keystone-usb.txt | 43 ++++++++++++++++++++
arch/arm/boot/dts/keystone.dtsi | 27 ++++++++++++
2 files changed, 70 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/keystone-usb.txt
diff --git a/Documentation/devicetree/bindings/usb/keystone-usb.txt b/Documentation/devicetree/bindings/usb/keystone-usb.txt
new file mode 100644
index 0000000..a67de8f
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/keystone-usb.txt
@@ -0,0 +1,43 @@
+TI Keystone Soc USB Controller
+
+DWC3 GLUE
+
+Required properties:
+ - compatible: should be "ti,keystone-dwc3".
+ - #address-cells, #size-cells : should be '1' if the device has sub-nodes
+ with 'reg' property.
+ - reg : Address and length of the register set for the device. First pair
+ is the USB subsystem specific register set. Second pair is the
+ USB subsystem PHY control register set.
+ - interrupts : The irq number of this device that is used to interrupt the
+ MPU.
+ - ranges: allows valid 1:1 translation between child's address space and
+ parent's address space.
+ - clocks: Clock IDs array as required by the controller.
+ - clock-names: names of clocks correseponding to IDs in the clock property.
+
+Sub-nodes:
+The dwc3 core should be added as subnode to Keystone DWC3 glue.
+- dwc3 :
+ The binding details of dwc3 can be found in:
+ Documentation/devicetree/bindings/usb/dwc3.txt
+
+Example:
+ usb: usb@2680000 {
+ compatible = "ti,keystone-dwc3";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x2680000 0x10000
+ 0x2620738 32>;
+ clocks = <&clkusb>;
+ clock-names = "usb";
+ interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;
+ ranges;
+
+ dwc3@2690000 {
+ compatible = "synopsys,dwc3";
+ reg = <0x2690000 0x70000>;
+ interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;
+ usb-phy = <&usb2_phy>, <&usb3_phy>;
+ };
+ };
diff --git a/arch/arm/boot/dts/keystone.dtsi b/arch/arm/boot/dts/keystone.dtsi
index f6d6d9e..1e1049c 100644
--- a/arch/arm/boot/dts/keystone.dtsi
+++ b/arch/arm/boot/dts/keystone.dtsi
@@ -181,5 +181,32 @@
interrupts = <GIC_SPI 300 IRQ_TYPE_EDGE_RISING>;
clocks = <&clkspi>;
};
+
+ usb2_phy: usb2_phy {
+ compatible = "usb-nop-xceiv";
+ };
+
+ usb3_phy: usb3_phy {
+ compatible = "usb-nop-xceiv";
+ };
+
+ usb: usb@2680000 {
+ compatible = "ti,keystone-dwc3";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ reg = <0x2680000 0x10000
+ 0x2620738 32>;
+ clocks = <&clkusb>;
+ clock-names = "usb";
+ interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;
+ ranges;
+
+ dwc3@2690000 {
+ compatible = "synopsys,dwc3";
+ reg = <0x2690000 0x70000>;
+ interrupts = <GIC_SPI 393 IRQ_TYPE_EDGE_RISING>;
+ usb-phy = <&usb2_phy>, <&usb3_phy>;
+ };
+ };
};
};
--
1.7.9.5
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