From: Peter Chen <peter.chen@xxxxxxx>
The bootloader may use device mode, and keep dp up. We need dp
to be pulled down before possbile charger detection operation.
Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
---
drivers/usb/chipidea/core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index ea8ac4a54a8d..804c0a5a213b 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -1123,8 +1123,11 @@ static int ci_hdrc_probe(struct platform_device *pdev)
if (!ci_otg_is_fsm_mode(ci)) {
/* only update vbus status for peripheral */
- if (ci->role == CI_ROLE_GADGET)
+ if (ci->role == CI_ROLE_GADGET) {
+ /* Pull down DP for possible charger detection */
+ hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
ci_handle_vbus_change(ci);
+ }
ret = ci_role_start(ci, ci->role);
if (ret) {
--
2.17.1
