usb: dwc3-generic: fix CONFIG_DM_REGULATOR-off case
When DM_REGULATOR is disabled, all calls will return -ENOSYS. Account
for that so that targets like the IOT2050 will work again.
Fixes: de451d5d5b6f ("usb: dwc3-generic: support external vbus regulator")
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
index a9ba315..2ab41cb 100644
--- a/drivers/usb/dwc3/dwc3-generic.c
+++ b/drivers/usb/dwc3/dwc3-generic.c
@@ -246,12 +246,12 @@
return rc;
rc = device_get_supply_regulator(dev, "vbus-supply", &priv->vbus_supply);
- if (rc)
+ if (rc && rc != -ENOSYS)
debug("%s: No vbus regulator found: %d\n", dev->name, rc);
- /* Only returns an error if regulator is valid and failed to enable due to a driver issue */
+ /* Does not return an error if regulator is invalid - but does so when DM_REGULATOR is disabled */
rc = regulator_set_enable_if_allowed(priv->vbus_supply, true);
- if (rc)
+ if (rc && rc != -ENOSYS)
return rc;
hccr = (struct xhci_hccr *)priv->gen_priv.base;