Re: [PATCH 1/2] phy: usbphy: Add dt documentation for Broadcom Cygnus USB PHY driver

From: Arun Ramamurthy
Date: Tue Feb 17 2015 - 16:04:40 EST

On 15-02-17 12:53 PM, Arnd Bergmann wrote:
On Tuesday 17 February 2015 12:00:49 Arun Ramamurthy wrote:
Arnd, I patched the ehci and ohci driver to accept multiple phys so they
require different names and cannot both be "usb". That patch was
accepted by Alen Stern but I did not update the bindings documentation.
I will send out another patch for that. Could we go with the naming
scheme of "usb" + "p" + port number or do you have other suggestions?

I don't have a good idea, but I think it would be best if the first
phy could remain named "usb" for compatibility with the existing binding.

The patch was written in a way that all the existing and new drivers can
continue to use "usb" if they are using only one phy so that we remain compatible. The names need to be different only if more than one phy is specified. In such cases i don't think the first phy should be "usb" as it would be confusing to have
phy-names = "usb","usbp1"
Should I run this by Alan Stern?
What is the reason for having two phys in your case? Are these
identical phy devices connected to a single controller or do they
server different purposes?

Yes, we have three identical phys connected to a single host controller and one of the phys is also connected to the device controller

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at