* [PATCH 1/1] usb: chipidea: otg: handling vbus disconnect event occurred during system suspend
@ 2020-02-19 9:25 Peter Chen
0 siblings, 0 replies; only message in thread
From: Peter Chen @ 2020-02-19 9:25 UTC (permalink / raw)
To: linux-usb; +Cc: linux-imx, jun.li, Peter Chen
During system suspend, the role switch may occur, eg, from gadget->host.
In this case, the vbus disconnect event is lost, we add this handling
in role switch routine in this commit.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
drivers/usb/chipidea/otg.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/usb/chipidea/otg.c b/drivers/usb/chipidea/otg.c
index fbfb02e05c97..be63924ea82e 100644
--- a/drivers/usb/chipidea/otg.c
+++ b/drivers/usb/chipidea/otg.c
@@ -170,6 +170,13 @@ static void ci_handle_id_switch(struct ci_hdrc *ci)
dev_dbg(ci->dev, "switching from %s to %s\n",
ci_role(ci)->name, ci->roles[role]->name);
+ if (ci->vbus_active && ci->role == CI_ROLE_GADGET)
+ /*
+ * vbus disconnect event is lost due to role
+ * switch occurs during system suspend.
+ */
+ usb_gadget_vbus_disconnect(&ci->gadget);
+
ci_role_stop(ci);
if (role == CI_ROLE_GADGET &&
--
2.17.1
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2020-02-19 9:25 [PATCH 1/1] usb: chipidea: otg: handling vbus disconnect event occurred during system suspend Peter Chen
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