From e2724acddab3926e14bcaf8e63dc9701ef17419a Mon Sep 17 00:00:00 2001 From: Wesley Cheng Date: Tue, 29 Dec 2020 15:03:29 -0800 Subject: [PATCH] FROMGIT: usb: dwc3: gadget: Introduce a DWC3 VBUS draw callback 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. Reviewed-by: Peter Chen Signed-off-by: Wesley Cheng Link: https://lore.kernel.org/r/1609283011-21997-2-git-send-email-wcheng@codeaurora.org Signed-off-by: Greg Kroah-Hartman (cherry picked from commit 82c46b8ed9dc395df902c1857e908f08f8395ca7 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-next) Signed-off-by: Greg Kroah-Hartman Change-Id: Ie24eec6d69a27e0de62d85a1dfacb225b6d6973f --- 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 ee44321fee38..a33e19a1fdef 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -2457,6 +2457,16 @@ 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, @@ -2466,6 +2476,7 @@ 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, }; /* -------------------------------------------------------------------------- */