mfd: omap-usb-host: Add device tree support and binding information

Allows the OMAP HS USB host controller to be specified
via device tree.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/mfd/omap-usb-host.txt b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
new file mode 100644
index 000000000000..b381fa696bf9
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/omap-usb-host.txt
@@ -0,0 +1,80 @@
+OMAP HS USB Host
+
+Required properties:
+
+- compatible: should be "ti,usbhs-host"
+- reg: should contain one register range i.e. start and length
+- ti,hwmods: must contain "usb_host_hs"
+
+Optional properties:
+
+- num-ports: number of USB ports. Usually this is automatically detected
+  from the IP's revision register but can be overridden by specifying
+  this property. A maximum of 3 ports are supported at the moment.
+
+- portN-mode: String specifying the port mode for port N, where N can be
+  from 1 to 3. If the port mode is not specified, that port is treated
+  as unused. When specified, it must be one of the following.
+        "ehci-phy",
+        "ehci-tll",
+        "ehci-hsic",
+        "ohci-phy-6pin-datse0",
+        "ohci-phy-6pin-dpdm",
+        "ohci-phy-3pin-datse0",
+        "ohci-phy-4pin-dpdm",
+        "ohci-tll-6pin-datse0",
+        "ohci-tll-6pin-dpdm",
+        "ohci-tll-3pin-datse0",
+        "ohci-tll-4pin-dpdm",
+        "ohci-tll-2pin-datse0",
+        "ohci-tll-2pin-dpdm",
+
+- single-ulpi-bypass: Must be present if the controller contains a single
+  ULPI bypass control bit. e.g. OMAP3 silicon <= ES2.1
+
+Required properties if child node exists:
+
+- #address-cells: Must be 1
+- #size-cells: Must be 1
+- ranges: must be present
+
+Properties for children:
+
+The OMAP HS USB Host subsystem contains EHCI and OHCI controllers.
+See Documentation/devicetree/bindings/usb/omap-ehci.txt and
+omap3-ohci.txt
+
+Example for OMAP4:
+
+usbhshost: usbhshost@4a064000 {
+        compatible = "ti,usbhs-host";
+        reg = <0x4a064000 0x800>;
+        ti,hwmods = "usb_host_hs";
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+
+        usbhsohci: ohci@4a064800 {
+                compatible = "ti,ohci-omap3", "usb-ohci";
+                reg = <0x4a064800 0x400>;
+                interrupt-parent = <&gic>;
+                interrupts = <0 76 0x4>;
+        };
+
+        usbhsehci: ehci@4a064c00 {
+                compatible = "ti,ehci-omap", "usb-ehci";
+                reg = <0x4a064c00 0x400>;
+                interrupt-parent = <&gic>;
+                interrupts = <0 77 0x4>;
+        };
+};
+
+&usbhshost {
+        port1-mode = "ehci-phy";
+        port2-mode = "ehci-tll";
+        port3-mode = "ehci-phy";
+};
+
+&usbhsehci {
+        phys = <&hsusb1_phy 0 &hsusb3_phy>;
+};