[PATCH] usb-musb: keep VBUS on when device is disconnected

Moreno Bartalucci
2017-03-15T14:43:57Z

With usb-musb port in host mode, when the device
is disconnected, either logically (because of a mode switch) or
physically (by pulling the cable), the USB port should keep
suppling VBUS, with no interruption, to prevent power loss on
USB powered devices.

Signed-off-by: Moreno Bartalucci <moreno.bartalucci@tecnorama.it>
---
drivers/usb/musb/musb_dsps.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 7c047c4..5d9986b 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -245,7 +245,7 @@ static int dsps_check_status(struct musb *musb, void *unused)
dsps_mod_timer_optional(glue);
break;
case OTG_STATE_A_WAIT_BCON:
- musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
+ musb_writeb(musb->mregs, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
skip_session = 1;
/* fall */

--
2.10.1 (Apple Git-78)