diff mbox series

[v4,2/2] usb: gadget: composite: Draw 100mA current if not configured

Message ID 1677217619-10261-3-git-send-email-quic_prashk@quicinc.com
State New
Headers
Series Fix vbus draw of dwc3 gadget |

Commit Message

Prashanth K Feb. 24, 2023, 5:46 a.m. UTC 
  Currently we don't change the current value if device isn't in
configured state. But in battery charging specification (section
1.2 and 1.4.13), it is mentioned that the device can draw up to
100mA of current if it's in unconfigured state. Hence add vbus
draw work in composite_resume to draw 100mA if the device isn't
configured.

Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
---
 drivers/usb/gadget/composite.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index 403563c..386140f 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2449,6 +2449,10 @@  void composite_resume(struct usb_gadget *gadget)
 			usb_gadget_clear_selfpowered(gadget);
 
 		usb_gadget_vbus_draw(gadget, maxpower);
+	} else {
+		maxpower = CONFIG_USB_GADGET_VBUS_DRAW;
+		maxpower = min(maxpower, 100U);
+		usb_gadget_vbus_draw(gadget, maxpower);
 	}
 
 	cdev->suspended = 0;