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Commit 5f0b74e5 authored by Andrzej Hajda's avatar Andrzej Hajda Committed by Felipe Balbi
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USB: dwc3: get extcon device by OF graph bindings 



extcon device is used to detect host/device connection. Since extcon
OF property is deprecated, alternative method should be added.
This method uses OF graph bindings to locate extcon.

Signed-off-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
parent fe8abf33

drivers/usb/dwc3/drd.c

+28 −6
Original line number Diff line number Diff line
@@ -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;

}



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);



	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);