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authorRoger Quadros <rogerq@ti.com>2013-04-09 12:39:18 +0400
committerSamuel Ortiz <sameo@linux.intel.com>2013-04-09 12:59:55 +0400
commit03a8f438f55c7abaaa1ddf5422a6c4abd1bdc1f6 (patch)
tree9153bf39676f306b125457baa646b38a012b8dc3 /Documentation/devicetree/bindings/mfd/omap-usb-host.txt
parent40b0d68a8c39c6d6cb7e975c9b180e2203864556 (diff)
downloadlinux-03a8f438f55c7abaaa1ddf5422a6c4abd1bdc1f6.tar.xz
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>
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+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>;
+};