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

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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: 2f3fd2c5bd ("usb: musb: Prepare dsps glue layer for PM runtime support")
Cc: [email protected] #v4.11
Reported-by: Moreno Bartalucci <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Signed-off-by: Bin Liu <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Bin Liu 2017-05-25 13:42:39 -05:00 • committed by Greg Kroah-Hartman
commit b3addcf0d1
1 changed files with 5 additions and 0 deletions
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5
drivers/usb/musb/musb_dsps.c
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@ -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 */