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usb: musb: dsps: keep VBUS on for host-only mode

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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>
This commit is contained in:
Bin Liu 2017-05-25 13:42:39 -05:00 committed by Greg Kroah-Hartman
parent a317afc0c1
commit bd3f89002e
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/musb/musb_dsps.c
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@ -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 */