diff mbox series

[2/2] usb: dwc3: add an alternate path in vbus_draw callback

Message ID 20210222115149.3606776-3-raychi@google.com (mailing list archive)
State Accepted
Commit effcaf3f59b5557b0423f4b0d64df49658a9ec64
Headers show
Series an additional path to control charging current | expand

Commit Message

Ray Chi Feb. 22, 2021, 11:51 a.m. UTC 
This patch adds an alternate path in vbus_draw callback through
power supply property POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT.

Signed-off-by: Ray Chi <raychi@google.com>
---
 drivers/usb/dwc3/gadget.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index aebcf8ec0716..47809835e163 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2530,11 +2530,19 @@  static void dwc3_gadget_set_ssp_rate(struct usb_gadget *g,
 static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
 {
 	struct dwc3		*dwc = gadget_to_dwc(g);
+	union power_supply_propval	val = {0};
+	int				ret;
 
 	if (dwc->usb2_phy)
 		return usb_phy_set_power(dwc->usb2_phy, mA);
 
-	return 0;
+	if (!dwc->usb_psy)
+		return -EOPNOTSUPP;
+
+	val.intval = mA;
+	ret = power_supply_set_property(dwc->usb_psy, POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, &val);
+
+	return ret;
 }
 
 static const struct usb_gadget_ops dwc3_gadget_ops = {