diff options
| author | Tony LIU <junjie.liu@freescale.com> | 2012-04-16 15:47:23 +0800 |
|---|---|---|
| committer | Frank Li <Frank.Li@freescale.com> | 2012-04-16 15:27:52 +0800 |
| commit | f8643e00fc4b405dfd69cbc9ab2b1584a503311e (patch) | |
| tree | 33b5d97a87bd8707933b3997b94d2425a44b890a | |
| parent | 11c09d944eaa875f73673a750b2f8f21a2b2b9e3 (diff) | |
ENGR00179679 Fix usb gadget suspend issue connected to usb charger
- the root cause of this issue is during resume process, USB clock
is not turned on for this USB charger case so that the second
suspend is processed without USB clock, it cause system hang
- in udc resume process, at this situation, we should exit low
power mode to enable the b session valid intrrupt to close the
usb clock when detach from usb charger
Signed-off-by: Tony LIU <junjie.liu@freescale.com>
| -rwxr-xr-x | drivers/usb/gadget/arcotg_udc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/gadget/arcotg_udc.c b/drivers/usb/gadget/arcotg_udc.c index 5a1aab94b405..ea81802a3ca6 100755 --- a/drivers/usb/gadget/arcotg_udc.c +++ b/drivers/usb/gadget/arcotg_udc.c @@ -3458,7 +3458,11 @@ end: dr_clk_gate(false); } - --udc_controller->suspended; + + if (!(--udc_controller->suspended) && !udc_controller->stopped) { + dr_clk_gate(true); + dr_phy_low_power_mode(udc_controller, false); + } enable_irq(udc_controller->irq); mutex_unlock(&udc_resume_mutex); printk(KERN_DEBUG "USB Gadget resume ends\n"); |