lkml.org 
[lkml]   [2020]   [Nov]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 1/3] usb: dwc3: gadget: Introduce a DWC3 VBUS draw callback
    Date
    Some devices support charging while in device mode.  In these situations,
    the USB gadget will notify the DWC3 gadget driver to modify the current
    based on the enumeration and device state. The usb_phy_set_power() API
    will allow external charger entities to adjust the charge current through
    the notifier block.

    Signed-off-by: Wesley Cheng <wcheng@codeaurora.org>
    ---
    drivers/usb/dwc3/gadget.c | 11 +++++++++++
    1 file changed, 11 insertions(+)

    diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
    index c145da1d8ba5..69122f66978e 100644
    --- a/drivers/usb/dwc3/gadget.c
    +++ b/drivers/usb/dwc3/gadget.c
    @@ -2387,6 +2387,16 @@ static void dwc3_gadget_set_speed(struct usb_gadget *g,
    spin_unlock_irqrestore(&dwc->lock, flags);
    }

    +static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
    +{
    + struct dwc3 *dwc = gadget_to_dwc(g);
    +
    + if (dwc->usb2_phy)
    + return usb_phy_set_power(dwc->usb2_phy, mA);
    +
    + return 0;
    +}
    +
    static const struct usb_gadget_ops dwc3_gadget_ops = {
    .get_frame = dwc3_gadget_get_frame,
    .wakeup = dwc3_gadget_wakeup,
    @@ -2396,6 +2406,7 @@ static const struct usb_gadget_ops dwc3_gadget_ops = {
    .udc_stop = dwc3_gadget_stop,
    .udc_set_speed = dwc3_gadget_set_speed,
    .get_config_params = dwc3_gadget_config_params,
    + .vbus_draw = dwc3_gadget_vbus_draw,
    };

    /* -------------------------------------------------------------------------- */
    --
    The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
    a Linux Foundation Collaborative Project
    \
     
     \ /
      Last update: 2020-11-14 09:14    [W:5.789 / U:0.004 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site