On 09/01/2023 18:00, Jon Hunter wrote: > > On 08/01/2023 15:21, Krzysztof Kozlowski wrote: > > ... > >> On 06/01/2023 16:28, Jon Hunter wrote: >>> + phys: >>> + minItems: 1 >>> + maxItems: 8 >>> + >>> + phy-names: >>> + minItems: 1 >>> + maxItems: 8 >>> + items: >>> + enum: >>> + - usb2-0 >>> + - usb2-1 >>> + - usb2-2 >>> + - usb2-3 >>> + - usb3-0 >>> + - usb3-1 >>> + - usb3-2 >>> + - usb3-3 >> >> Why do you have so many optional phys? In what case you would put there >> usb2-0 and usb3-3 together? Or even 8 phys at the same time? IOW, what >> are the differences between them and why one controller would be >> connected once to usb3-2 and once to usb3-3 phy? And once to both? > > > Here is the description from the device documentation ... > > "The NVIDIA Orin series System-on-Chip (SoC) has one xHCI host > controller and one USB 3.2 Gen1 x1 device controller. The two > controllers control a total of up to eight exposed ports. There are up > to four USB 2.0 ports and up to four USB 3.2 Gen1 x1 ports." > > So there are eight phys and we could have 4 USB2 and 4 USB3. Depending > on which pins you want to use, you could have various combinations. I > can add these details to the binding doc if that helps. Yeah, could solve some questions. Best regards, Krzysztof
