Re: proposal for switching off stuff for external ports

2012-09-27 Thread Alan Stern
On Wed, 26 Sep 2012, Sarah Sharp wrote: > > Oliver was pointing out that if none of the attached devices are FS/LS > > then the companion controller and all its ports could be powered off. > > The EHCI driver knows when a new FS/LS device gets attached, so it > > could arrange for the companio

Re: proposal for switching off stuff for external ports

2012-09-26 Thread Sarah Sharp
On Wed, Sep 26, 2012 at 03:14:59PM -0400, Alan Stern wrote: > On Wed, 26 Sep 2012, Sarah Sharp wrote: > > On Wed, Sep 26, 2012 at 05:31:43PM +0200, Oliver Neukum wrote: > > > And it seems to me that in many cases, namely > > > EHCI with companion controllers and XHCI controllers that implement > >

Re: proposal for switching off stuff for external ports

2012-09-26 Thread Alan Stern
On Wed, 26 Sep 2012, Sarah Sharp wrote: > On Wed, Sep 26, 2012 at 05:31:43PM +0200, Oliver Neukum wrote: > > Hi Sarah, > > > > watching your talk and drinking tea I had an idea. > > > > Switching off ports saves power in itself. It also allows > > switching off host controllers. > > The problem

Re: proposal for switching off stuff for external ports

2012-09-26 Thread Sarah Sharp
On Wed, Sep 26, 2012 at 05:31:43PM +0200, Oliver Neukum wrote: > Hi Sarah, > > watching your talk and drinking tea I had an idea. > > Switching off ports saves power in itself. It also allows > switching off host controllers. > The problem with switching off power on external ports is that they >

Re: proposal for switching off stuff for external ports

2012-09-26 Thread Oliver Neukum
On Wednesday 26 September 2012 18:38:38 Felipe Balbi wrote: > Hi, > > On Wed, Sep 26, 2012 at 05:31:43PM +0200, Oliver Neukum wrote: > > Hi Sarah, > > > > watching your talk and drinking tea I had an idea. > > > > Switching off ports saves power in itself. It also allows > > switching off host c

Re: proposal for switching off stuff for external ports

2012-09-26 Thread Felipe Balbi
Hi, On Wed, Sep 26, 2012 at 05:31:43PM +0200, Oliver Neukum wrote: > Hi Sarah, > > watching your talk and drinking tea I had an idea. > > Switching off ports saves power in itself. It also allows > switching off host controllers. > The problem with switching off power on external ports is that t