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| author | Pratyush Anand <pratyush.anand@st.com> | 2014-07-04 17:01:23 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-07-09 15:41:34 -0700 |
| commit | 9502c46cc9d39330b29d9dc27d8baff4f55d0abc (patch) | |
| tree | 0bb78702768f662bdef5537e9b7a3bdf983deb53 /include/linux/usb | |
| parent | ec5734c41bee2ee7c938a8f34853d31cada7e67a (diff) | |
| download | cachepc-linux-9502c46cc9d39330b29d9dc27d8baff4f55d0abc.tar.gz cachepc-linux-9502c46cc9d39330b29d9dc27d8baff4f55d0abc.zip | |
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>
Diffstat (limited to 'include/linux/usb')
0 files changed, 0 insertions, 0 deletions