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USB: dwc3: get extcon device by OF graph bindings

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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: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Andrzej Hajda 2018-05-15 14:12:38 +02:00 committed by Felipe Balbi
parent fe8abf332b
commit 5f0b74e548
1 changed files with 28 additions and 6 deletions
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34
drivers/usb/dwc3/drd.c
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@ -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);
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);