diff options
| author | Juha Yrj?l? <juha.yrjola@nokia.com> | 2005-10-16 15:47:04 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-10-28 16:47:45 -0700 |
| commit | 4e67185a7ac3ecb1710e636e2f7e318e99298c7a (patch) | |
| tree | 035fa1745baa6490425d44dc126c72ddc366497f | |
| parent | f37be9b9be3ebc02d2d075d7f53f7802f3e005db (diff) | |
[PATCH] add usb transceiver set_suspend() method
When a USB device is put into suspend mode, the current drawn from VBUS
has to be less than 500 uA. Some transceivers need to be put into a
special power-saving mode to accomplish this, and won't have a separate
OTG driver handling that.
This adds a suspend method to the "otg_transceiver" struct -- misnamed,
it's not only for OTG -- and calls it from the OMAP UDC driver.
Signed-off-by: Juha Yrj?l? <juha.yrjola@nokia.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/gadget/omap_udc.c | 4 | ||||
| -rw-r--r-- | include/linux/usb_otg.h | 13 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c index de8a89ae4bc..b42799bc747 100644 --- a/drivers/usb/gadget/omap_udc.c +++ b/drivers/usb/gadget/omap_udc.c @@ -1788,8 +1788,12 @@ static void devstate_irq(struct omap_udc *udc, u16 irq_src) udc->driver->suspend(&udc->gadget); spin_lock(&udc->lock); } + if (udc->transceiver) + otg_set_suspend(udc->transceiver, 1); } else { VDBG("resume\n"); + if (udc->transceiver) + otg_set_suspend(udc->transceiver, 0); if (udc->gadget.speed == USB_SPEED_FULL && udc->driver->resume) { spin_unlock(&udc->lock); diff --git a/include/linux/usb_otg.h b/include/linux/usb_otg.h index c6683146e9b..f827f6e203c 100644 --- a/include/linux/usb_otg.h +++ b/include/linux/usb_otg.h @@ -63,6 +63,10 @@ struct otg_transceiver { int (*set_power)(struct otg_transceiver *otg, unsigned mA); + /* for non-OTG B devices: set transceiver into suspend mode */ + int (*set_suspend)(struct otg_transceiver *otg, + int suspend); + /* for B devices only: start session with A-Host */ int (*start_srp)(struct otg_transceiver *otg); @@ -108,6 +112,15 @@ otg_set_power(struct otg_transceiver *otg, unsigned mA) } static inline int +otg_set_suspend(struct otg_transceiver *otg, int suspend) +{ + if (otg->set_suspend != NULL) + return otg->set_suspend(otg, suspend); + else + return 0; +} + +static inline int otg_start_srp(struct otg_transceiver *otg) { return otg->start_srp(otg); |