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Diffstat (limited to 'Documentation/devicetree/bindings/usb/omap-usb.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/usb/omap-usb.txt | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/usb/omap-usb.txt b/Documentation/devicetree/bindings/usb/omap-usb.txt new file mode 100644 index 00000000..d4769f34 --- /dev/null +++ b/Documentation/devicetree/bindings/usb/omap-usb.txt @@ -0,0 +1,94 @@ +OMAP GLUE AND OTHER OMAP SPECIFIC COMPONENTS + +OMAP MUSB GLUE + - compatible : Should be "ti,omap4-musb" or "ti,omap3-musb" + - ti,hwmods : must be "usb_otg_hs" + - ti,has-mailbox : to specify that omap uses an external mailbox + (in control module) to communicate with the musb core during device connect + and disconnect. + - multipoint : Should be "1" indicating the musb controller supports + multipoint. This is a MUSB configuration-specific setting. + - num-eps : Specifies the number of endpoints. This is also a + MUSB configuration-specific setting. Should be set to "16" + - ram-bits : Specifies the ram address size. Should be set to "12" + - interface-type : This is a board specific setting to describe the type of + interface between the controller and the phy. It should be "0" or "1" + specifying ULPI and UTMI respectively. + - mode : Should be "3" to represent OTG. "1" signifies HOST and "2" + represents PERIPHERAL. + - power : Should be "50". This signifies the controller can supply upto + 100mA when operating in host mode. + - usb-phy : the phandle for the PHY device + +Optional properties: + - ctrl-module : phandle of the control module this glue uses to write to + mailbox + +SOC specific device node entry +usb_otg_hs: usb_otg_hs@4a0ab000 { + compatible = "ti,omap4-musb"; + ti,hwmods = "usb_otg_hs"; + ti,has-mailbox; + multipoint = <1>; + num-eps = <16>; + ram-bits = <12>; + ctrl-module = <&omap_control_usb>; +}; + +Board specific device node entry +&usb_otg_hs { + interface-type = <1>; + mode = <3>; + power = <50>; +}; + +OMAP DWC3 GLUE + - compatible : Should be "ti,dwc3" + - ti,hwmods : Should be "usb_otg_ss" + - reg : Address and length of the register set for the device. + - interrupts : The irq number of this device that is used to interrupt the + MPU + - #address-cells, #size-cells : Must be present if the device has sub-nodes + - utmi-mode : controls the source of UTMI/PIPE status for VBUS and OTG ID. + It should be set to "1" for HW mode and "2" for SW mode. + - ranges: the child address space are mapped 1:1 onto the parent address space + +Sub-nodes: +The dwc3 core should be added as subnode to omap dwc3 glue. +- dwc3 : + The binding details of dwc3 can be found in: + Documentation/devicetree/bindings/usb/dwc3.txt + +omap_dwc3 { + compatible = "ti,dwc3"; + ti,hwmods = "usb_otg_ss"; + reg = <0x4a020000 0x1ff>; + interrupts = <0 93 4>; + #address-cells = <1>; + #size-cells = <1>; + utmi-mode = <2>; + ranges; +}; + +OMAP CONTROL USB + +Required properties: + - compatible: Should be "ti,omap-control-usb" + - reg : Address and length of the register set for the device. It contains + the address of "control_dev_conf" and "otghs_control" or "phy_power_usb" + depending upon omap4 or omap5. + - reg-names: The names of the register addresses corresponding to the registers + filled in "reg". + - ti,type: This is used to differentiate whether the control module has + usb mailbox or usb3 phy power. omap4 has usb mailbox in control module to + notify events to the musb core and omap5 has usb3 phy power register to + power on usb3 phy. Should be "1" if it has mailbox and "2" if it has usb3 + phy power. + +omap_control_usb: omap-control-usb@4a002300 { + compatible = "ti,omap-control-usb"; + reg = <0x4a002300 0x4>, + <0x4a00233c 0x4>; + reg-names = "control_dev_conf", "otghs_control"; + ti,type = <1>; +}; |
