lkml.org 
[lkml]   [2013]   [Jul]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 1/6] usb: host: add has_tdi_phy_lpm capability bit
On Wed, 31 Jul 2013, Tuomas Tynkkynen wrote:

> The has_hostpc capability bit indicates that the host controller has the
> HOSTPC register extensions, but at the same time enables clock disabling
> power saving features with the PHY Low Power Clock Disable (PHCD) bit.
>
> However, some host controllers have the HOSTPC extensions but don't
> support the low-power feature, so the PHCD bit must not be set on those
> controllers. Add a separate capability bit for the low-power feature
> instead, and change all existing users of has_hostpc to use this new
> capability bit.
>
> The idea for this commit is taken from an old 2012 commit that never got
> merged ("disociate chipidea PHY low power suspend control from hostpc")
>
> Inspired-by: Matthieu CASTET <matthieu.castet@parrot.com>
> Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>

Acked-by: Alan Stern <stern@rowland.harvard.edu>



\
 
 \ /
  Last update: 2013-07-31 21:21    [W:0.134 / U:5.764 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site