From: Pratyush Anand <pratyush.anand@st.com>
Date: Fri, 4 Jul 2014 14:01:23 +0000 (+0300)
Subject: xhci: A default implementation for Ux timeout calculation and tier policy check
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~164^2~81
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9502c46cc9d39330b29d9dc27d8baff4f55d0abc;p=pandora-kernel.git

xhci: A default implementation for Ux timeout calculation and tier policy check

As best case, a host controller should support U0 to U1 switching for
the devices connected below any tier of hub level supported by usb
specification. Therefore xhci_check_tier_policy should always return
success as default implementation.

A host should be able to issue LGO_Ux after the timeout calculated as
per definition of system exit latency defined in C.1.5.2. Therefore
xhci_calculate_ux_timeout returns ux_params.sel as the default
implementation.

Use default calculation in absence of any vendor specific limitations.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Tested-by: Aymen Bouattay <aymen.bouattay@st.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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