diff options
| author | Peter Chen <peter.chen@freescale.com> | 2013-03-01 16:37:42 +0800 |
|---|---|---|
| committer | Peter Chen <peter.chen@freescale.com> | 2013-03-06 09:09:28 +0800 |
| commit | 59fc3c58c471a125e5882ae3823545f24843eb75 (patch) | |
| tree | a0ebd1cfed6fda9cb78e6c555233c32e7b25130e | |
| parent | 456627186832cb315805b16a9e3a44034cc7a2b2 (diff) | |
ENGR00251209-2 usb: otg: fix the dp/dm will be floating when phy is no 3v3
For the design which the phy is no power (no 5v for VBUS), the
PHY can't get dp/dm correctly, so it the port change interrpt
is enabled or the host enters low power mode, the unexpected
interrupt will occur.
This commit will make the dp/dm as zero at otg configuration.
For gadget-only, the same function is existed at probe.
For host-only, the vbus will be on before port change interrupt
is enabled.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
| -rwxr-xr-x | drivers/usb/otg/fsl_otg.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/usb/otg/fsl_otg.c b/drivers/usb/otg/fsl_otg.c index 292c2e930b5d..9fd3c87babfb 100755 --- a/drivers/usb/otg/fsl_otg.c +++ b/drivers/usb/otg/fsl_otg.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2005-2012 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright (C) 2005-2013 Freescale Semiconductor, Inc. All Rights Reserved. * * Author: Li Yang <LeoLi@freescale.com> * Jerry Huang <Chang-Ming.Huang@freescale.com> @@ -631,6 +631,11 @@ static int fsl_otg_set_host(struct otg_transceiver *otg_p, struct usb_bus *host) if (otg_dev->fsm.id) { otg_dev->host_first_call = true; + /* The discharge will be false when the controller + * is ready to use. + */ + if (pdata->dr_discharge_line) + pdata->dr_discharge_line(true); schedule_otg_work(&otg_dev->otg_event, 100); } else { |