On Thu, Nov 5, 2015 at 1:55 AM, Jon Hunter <jonathanh@xxxxxxxxxx> wrote: >> +UTMI ports: >> +----------- >> + >> +Required properties: >> +- status: Defines the operation status of the port. Valid values are: >> + - "disabled": the port is disabled >> + - "okay": the port is enabled >> +- mode: A string that determines the mode in which to run the port. Valid >> + values are: >> + - "host": for USB host mode >> + - "device": for USB device mode >> + - "otg": for USB OTG mode >> + >> +Optional properties: >> +- nvidia,internal: A boolean property whose presence determines that a port >> + is internal. In the absence of this property the port is considered to be >> + external. >> +- vbus-supply: phandle to a regulator supplying the VBUS voltage. >> + >> +ULPI ports: >> +----------- >> + >> +Optional properties: >> +- status: Defines the operation status of the port. Valid values are: >> + - "disabled": the port is disabled >> + - "okay": the port is enabled >> +- nvidia,internal: A boolean property whose presence determines that a port >> + is internal. In the absence of this property the port is considered to be >> + external. >> + >> +HSIC ports: >> +----------- >> + >> +Required properties: >> +- status: Defines the operation status of the port. Valid values are: >> + - "disabled": the port is disabled >> + - "okay": the port is enabled >> + >> +Super-speed USB ports: >> +---------------------- >> + >> +Required properties: >> +- status: Defines the operation status of the port. Valid values are: >> + - "disabled": the port is disabled >> + - "okay": the port is enabled >> +- nvidia,port: A single cell that specifies the physical port number to map >> + this super-speed USB port to. The range of valid port numbers varies with >> + the SoC generation: >> + - 0-2: for Tegra124 and Tegra132 > > I am a bit confused by what nvidia,port property is used for. Is this to > program XUSB_PADCTL_SS_PORT_MAP_0? If so then I think that this should > be an optional property because if you want to use the usb3 ports for > usb3, then we should not need to specify this here. "nvidia,port" is used to program XUSB_PADCTL_SS_PORT_MAP and is definitely required. It specifies the UTMI port to which the SS port is mapped to. For example, Nyan-Big has 3 UTMI ports (0, 1 (internal), and 2) and 2 SS ports (0 and 1). SS port 0 is mapped to the same physical port as UTMI port 0 and SS port 1 is mapped to the same physical port as UTMI port 2. > Also the XHCI has 3 usb2 ports and 2 usb3 ports and so when you have > port numbers 0-2 I am not sure what you are referring too. The port numbers correspond tot he UTMI ports, so 3 UTMI ports = possible port values of 0 - 2. Maybe "port" isn't the best name here? -Andrew -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
