diff options
Diffstat (limited to 'drivers/usb/dwc3/drd.c')
| -rw-r--r-- | drivers/usb/dwc3/drd.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c index 1d8c557e97e0..218371f985ca 100644 --- a/drivers/usb/dwc3/drd.c +++ b/drivers/usb/dwc3/drd.c @@ -8,6 +8,7 @@ */ #include <linux/extcon.h> +#include <linux/of_graph.h> #include <linux/platform_device.h> #include "debug.h" @@ -439,17 +440,38 @@ static int dwc3_drd_notifier(struct notifier_block *nb, return NOTIFY_DONE; } +static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc) +{ + struct device *dev = dwc->dev; + struct device_node *np_phy, *np_conn; + struct extcon_dev *edev; + + if (of_property_read_bool(dev->of_node, "extcon")) + return extcon_get_edev_by_phandle(dwc->dev, 0); + + np_phy = of_parse_phandle(dev->of_node, "phys", 0); + np_conn = of_graph_get_remote_node(np_phy, -1, -1); + + if (np_conn) + edev = extcon_find_edev_by_node(np_conn); + else + edev = NULL; + + of_node_put(np_conn); + of_node_put(np_phy); + + return edev; +} + int dwc3_drd_init(struct dwc3 *dwc) { int ret, irq; - if (dwc->dev->of_node && - of_property_read_bool(dwc->dev->of_node, "extcon")) { - dwc->edev = extcon_get_edev_by_phandle(dwc->dev, 0); - - if (IS_ERR(dwc->edev)) - return PTR_ERR(dwc->edev); + dwc->edev = dwc3_get_extcon(dwc); + if (IS_ERR(dwc->edev)) + return PTR_ERR(dwc->edev); + if (dwc->edev) { dwc->edev_nb.notifier_call = dwc3_drd_notifier; ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST, &dwc->edev_nb); |