linux

iv/linux

History

Chunfeng Yun d98a30ccdc usb: mtu3: fix random remote wakeup

Some platforms, e.g. 8183/8192, use low level latch way to keep
wakeup signal, it may latch a wrong signal if debounce more time,
and enable wakeup earlier.
                   ____________________
ip_sleep      ____/                    \__________
                           ___________________
wakeup_signal ____________/                   \______
                      _______________________________
wakeup_en     _______/
                      ^     ^
                      |(1)  |(2)
latch wakeup_signal mistakenly at (1), should latch it at (2);

Workaround: delay about 100us to enable wakeup, meanwhile decrease
debounce time.

Fixes: b1a344589eea ("usb: mtu3: support ip-sleep wakeup for MT8183")
Cc: stable@vger.kernel.org
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20210826083637.33237-2-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2021-08-26 13:41:52 +02:00

Kconfig

usb: mtu3: register a USB Role Switch for dual role mode

2019-09-03 20:02:15 +02:00

Makefile

usb: mtu3: add tracepoints to help debug

2019-03-26 16:40:14 +09:00

mtu3_core.c

usb: mtu3: restore HS function when set SS/SSP

2021-08-13 13:05:50 +02:00

mtu3_debug.h

usb: mtu3: mtu3_debug: remove an unused struct member