diff options
| author | Bin Liu <b-liu@ti.com> | 2017-05-25 13:42:39 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-24 07:11:13 +0200 |
| commit | bd3f89002e526bb954d8b8a5620bd6810423f040 (patch) | |
| tree | 885f43f648d46ee4b48ed513399dfceb9ce34c33 | |
| parent | a317afc0c1ce9f49573ae8182d2a0f38d0171962 (diff) | |
usb: musb: dsps: keep VBUS on for host-only mode
commit b3addcf0d1f04f53fcc302577d5a5e964c18531a upstream.
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")
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>
| -rw-r--r-- | drivers/usb/musb/musb_dsps.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c index 9f125e179acd..39666fb911b0 100644 --- a/drivers/usb/musb/musb_dsps.c +++ b/drivers/usb/musb/musb_dsps.c @@ -213,6 +213,12 @@ static int dsps_check_status(struct musb *musb, void *unused) msecs_to_jiffies(wrp->poll_timeout)); break; case OTG_STATE_A_WAIT_BCON: + /* keep VBUS on for host-only mode */ + if (musb->port_mode == MUSB_PORT_MODE_HOST) { + mod_timer(&glue->timer, jiffies + + msecs_to_jiffies(wrp->poll_timeout)); + break; + } musb_writeb(musb->mregs, MUSB_DEVCTL, 0); skip_session = 1; /* fall */ |