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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: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
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1 changed files with 28 additions and 6 deletions
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@ -8,6 +8,7 @@
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*/
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#include <linux/extcon.h>
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#include <linux/of_graph.h>
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#include <linux/platform_device.h>
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#include "debug.h"
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@ -439,17 +440,38 @@ static int dwc3_drd_notifier(struct notifier_block *nb,
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return NOTIFY_DONE;
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}
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struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
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{
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struct device *dev = dwc->dev;
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struct device_node *np_phy, *np_conn;
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struct extcon_dev *edev;
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if (of_property_read_bool(dev->of_node, "extcon"))
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return extcon_get_edev_by_phandle(dwc->dev, 0);
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np_phy = of_parse_phandle(dev->of_node, "phys", 0);
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np_conn = of_graph_get_remote_node(np_phy, -1, -1);
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if (np_conn)
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edev = extcon_find_edev_by_node(np_conn);
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else
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edev = NULL;
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of_node_put(np_conn);
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of_node_put(np_phy);
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return edev;
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}
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int dwc3_drd_init(struct dwc3 *dwc)
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{
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int ret, irq;
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if (dwc->dev->of_node &&
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of_property_read_bool(dwc->dev->of_node, "extcon")) {
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dwc->edev = extcon_get_edev_by_phandle(dwc->dev, 0);
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if (IS_ERR(dwc->edev))
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return PTR_ERR(dwc->edev);
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dwc->edev = dwc3_get_extcon(dwc);
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if (IS_ERR(dwc->edev))
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return PTR_ERR(dwc->edev);
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if (dwc->edev) {
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dwc->edev_nb.notifier_call = dwc3_drd_notifier;
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ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST,
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&dwc->edev_nb);
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