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Message-Id: <20200203161908.866733370@linuxfoundation.org>
Date: Mon, 3 Feb 2020 16:19:24 +0000
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Bin Liu <b-liu@...com>,
Felipe Balbi <balbi@...nel.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 32/53] usb: dwc3: turn off VBUS when leaving host mode
From: Bin Liu <b-liu@...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@...r.kernel.org
Signed-off-by: Bin Liu <b-liu@...com>
Signed-off-by: Felipe Balbi <balbi@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.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 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)
--
2.20.1
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