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Subject[PATCH 4.9 40/68] usb: dwc3: turn off VBUS when leaving host mode
Date
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 --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 30bc5996a2f23..a89072f3bd3fb 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -936,6 +936,9 @@ 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)
--
2.20.1


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