diff options
| author | Bin Liu <b-liu@ti.com> | 2017-05-25 13:42:39 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-27 11:54:46 +0200 |
| commit | b3addcf0d1f04f53fcc302577d5a5e964c18531a (patch) | |
| tree | 0cc8dc545fb8b7a0224f9ac4f176b5f57ef7e558 /drivers/usb/musb | |
| parent | 8b77b0cfa99edbc4993139aab7592a2315c7bff4 (diff) | |
| download | linux-0-day-b3addcf0d1f04f53fcc302577d5a5e964c18531a.tar.gz linux-0-day-b3addcf0d1f04f53fcc302577d5a5e964c18531a.tar.xz | |
usb: musb: dsps: keep VBUS on for host-only mode
Currently VBUS is turned off while a usb device is detached, and turned
on again by the polling routine. This short period VBUS loss prevents
usb modem to switch mode.
VBUS should be constantly on for host-only mode, so this changes the
driver to not turn off VBUS for host-only mode.
Fixes: 2f3fd2c5bde1 ("usb: musb: Prepare dsps glue layer for PM runtime support")
Cc: stable@vger.kernel.org #v4.11
Reported-by: Moreno Bartalucci <moreno.bartalucci@tecnorama.it>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/musb_dsps.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index 9c7ee26ef3880..bc6a9be2ccc55 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -245,6 +245,11 @@ static int dsps_check_status(struct musb *musb, void *unused) dsps_mod_timer_optional(glue); break; case OTG_STATE_A_WAIT_BCON: + /* keep VBUS on for host-only mode */ + if (musb->port_mode == MUSB_PORT_MODE_HOST) { + dsps_mod_timer_optional(glue); + break; + } musb_writeb(musb->mregs, MUSB_DEVCTL, 0); skip_session = 1; /* fall */ |