diff options
| author |   John Youn <johnyoun@synopsys.com> | 2017-04-28 12:55:20 +0400 |
|---|---|---|
| committer |   Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-06-02 11:22:32 +0300 |
| commit | a9548c55295a4268f9187e1ec93264a0682fa745 (patch) | |
| tree | 5ea14d14aa8845ffb1507bd2731a4cd62aa55c3d /include/linux/usb/gadget.h | |
| parent | usb: gadget: composite: Exclude SS Dev Cap Desc (diff) | |
| download | linux-dev-a9548c55295a4268f9187e1ec93264a0682fa745.tar.xz linux-dev-a9548c55295a4268f9187e1ec93264a0682fa745.zip | |
usb: gadget: Allow a non-SuperSpeed gadget to support LPM
This commit allows a gadget that does not support SuperSpeed to indicate
that it supports LPM. It does this by setting the 'lpm_capable' flag in
the gadget structure.
If a gadget sets this, the composite gadget framework will set the
bcdUSB to 0x0201 to indicate that this supports BOS descriptors, and
also return a USB 2.0 Extension descriptor as part of the BOS descriptor
set.
See USB 2.0 LPM ECN Section 3.
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Sevak Arakelyan <sevaka@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'include/linux/usb/gadget.h')
| -rw-r--r-- | include/linux/usb/gadget.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index fbc22a39e7bc..3ee5f2a7c0b4 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -352,6 +352,8 @@ struct usb_gadget_ops { * @deactivated: True if gadget is deactivated - in deactivated state it cannot * be connected. * @connected: True if gadget is connected. + * @lpm_capable: If the gadget max_speed is FULL or HIGH, this flag + * indicates that it supports LPM as per the LPM ECN & errata. * * Gadgets have a mostly-portable "gadget driver" implementing device * functions, handling all usb configurations and interfaces. Gadget @@ -404,6 +406,7 @@ struct usb_gadget { unsigned is_selfpowered:1; unsigned deactivated:1; unsigned connected:1; + unsigned lpm_capable:1; }; #define work_to_gadget(w) (container_of((w), struct usb_gadget, work)) |