diff options
| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2022-06-16 22:44:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-21 17:40:51 +0300 |
| commit | 8709115180c612bd8e6686a7b6c6fe94e5b51cdc (patch) | |
| tree | 7fa12eacb8c45377e976e3536f3b0c32168efd31 /drivers/usb/chipidea/udc.c | |
| parent | 5c586db8465274ce5db64171d42a099ce89ec905 (diff) | |
| download | linux-8709115180c612bd8e6686a7b6c6fe94e5b51cdc.tar.xz | |
usb: chipidea: udc: implement get_frame
The chipidea udc core is capable of reading the current frame index from
hardware. This patch adds the get_frame callback to the driver.
Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Link: https://lore.kernel.org/r/20220616194459.2981519-1-m.grzeschik@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/chipidea/udc.c')
| -rw-r--r-- | drivers/usb/chipidea/udc.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c index dc6c96e04bcf..0c9ae9768a67 100644 --- a/drivers/usb/chipidea/udc.c +++ b/drivers/usb/chipidea/udc.c @@ -1651,6 +1651,19 @@ static const struct usb_ep_ops usb_ep_ops = { /****************************************************************************** * GADGET block *****************************************************************************/ + +static int ci_udc_get_frame(struct usb_gadget *_gadget) +{ + struct ci_hdrc *ci = container_of(_gadget, struct ci_hdrc, gadget); + unsigned long flags; + int ret; + + spin_lock_irqsave(&ci->lock, flags); + ret = hw_read(ci, OP_FRINDEX, 0x3fff); + spin_unlock_irqrestore(&ci->lock, flags); + return ret >> 3; +} + /* * ci_hdrc_gadget_connect: caller makes sure gadget driver is binded */ @@ -1807,6 +1820,7 @@ static struct usb_ep *ci_udc_match_ep(struct usb_gadget *gadget, * Check "usb_gadget.h" for details */ static const struct usb_gadget_ops usb_gadget_ops = { + .get_frame = ci_udc_get_frame, .vbus_session = ci_udc_vbus_session, .wakeup = ci_udc_wakeup, .set_selfpowered = ci_udc_selfpowered, |