diff mbox series

[4.4,32/53] usb: dwc3: turn off VBUS when leaving host mode

Message ID 20200203161908.866733370@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Feb. 3, 2020, 4:19 p.m. UTC 
From: Bin Liu <b-liu@ti.com>

[ Upstream commit 09ed259fac621634d51cd986aa8d65f035662658 ]

VBUS should be turned off when leaving the host mode.
Set GCTL_PRTCAP to device mode in teardown to de-assert DRVVBUS pin to
turn off VBUS power.

Fixes: 5f94adfeed97 ("usb: dwc3: core: refactor mode initialization to its own function")
Cc: stable@vger.kernel.org
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/dwc3/core.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 4378e758baef9..591bc3f7be763 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -801,6 +801,9 @@  static void dwc3_core_exit_mode(struct dwc3 *dwc)
 		/* do nothing */
 		break;
 	}
+
+	/* de-assert DRVVBUS for HOST and OTG mode */
+	dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
 }
 
 #define DWC3_ALIGN_MASK		(16 - 1)