diff options
| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2019-08-05 22:24:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-05 17:19:46 +0200 |
| commit | 582ee9c5ad2661b359309f379f5c411fd33e511a (patch) | |
| tree | 3af5ba55f783cc0504cdf9dcefb6e05e607e3b21 /drivers/base | |
| parent | d3523b631403897bf560927321ca8c2ea0aed873 (diff) | |
USB: Disable USB2 LPM at shutdown
The QCA Rome USB Bluetooth controller has several issues once LPM gets
enabled:
- Fails to get enumerated in coldboot. [1]
- Drains more power (~ 0.2W) when the system is in S5. [2]
- Disappears after a warmboot. [2]
The issue happens because the device lingers at LPM L1 in S5, so device
can't get enumerated even after a reboot.
Disable LPM at shutdown to solve the issue.
[1] https://bugs.launchpad.net/bugs/1757218
[2] https://patchwork.kernel.org/patch/10607097/
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20190805142412.23965-1-kai.heng.feng@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base')
0 files changed, 0 insertions, 0 deletions