From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Dooks Date: Thu, 10 Apr 2014 11:01:05 +0000 Subject: Re: [PATCH 1/2] usb: rename 'phy' field of 'struct usb_hcd' to 'transceiver' Message-Id: <534679F1.3050607@codethink.co.uk> List-Id: References: <53458E95.4080505@cogentembedded.com> <534598EF.3010102@wwwdotorg.org> <53459A48.1010003@cogentembedded.com> <063D6719AE5E284EB5DD2968C1650D6D0F6F43C3@AcuExch.aculab.com> <53467720.8000400@cogentembedded.com> In-Reply-To: <53467720.8000400@cogentembedded.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Sergei Shtylyov , David Laight , Stephen Warren , Alan Stern Cc: "gregkh@linuxfoundation.org" , "linux-usb@vger.kernel.org" , "Peter.Chen@freescale.com" , "thierry.reding@gmail.com" , "balbi@ti.com" , "linux-tegra@vger.kernel.org" , "linux-omap@vger.kernel.org" , "linux-sh@vger.kernel.org" , "magnus.damm@gmail.com" On 10/04/14 11:49, Sergei Shtylyov wrote: > On 10-04-2014 13:20, David Laight wrote: > >>> It doesn't do any pin muxing. It switches SoC internal USB >>> signals between >>> USB controllers. The pins remain the same. > >> Doesn't something like that already happen for the companion USB1 >> controllers for USB2 ports? > > Did you mean USB 1.1 and USB 2.0 controllers by USB1 and USB2? > >> That also doesn't sound like you are changing the PHY. > > I am changing one of the PHY registers that controls USB port > (Renesas calls it channel) multiplexing. > >> I'd have thought that would happen if you had a single controller >> that select between multiply PHY. > > No, it's not the case. There is an interesting case, the USB3 shares a PHY with a SATA and the PCIE and SATA also share a PHY on the R8A7790. -- Ben Dooks http://www.codethink.co.uk/ Senior Engineer Codethink - Providing Genius