From: Valentine Barshak <valentine.bars...@cogentembedded.com>
This adds external USB phy support to USB HCD driver that
allows to find and initialize external USB phy, bound to
the HCD, when the HCD is added.
The usb_add_hcd function returns -EPROBE_DEFER if the USB
phy, bound to the HCD, is not ready.
If no USB phy is bound, the HCD is initialized as usual.
Signed-off-by: Valentine Barshak <valentine.bars...@cogentembedded.com>
Acked-by: Alan Stern <st...@rowland.harvard.edu>
---
drivers/usb/core/hcd.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index d939521..fd09ec6 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -2597,6 +2597,26 @@ int usb_add_hcd(struct usb_hcd *hcd,
int retval;
struct usb_device *rhdev;
+#ifdef CONFIG_USB_PHY
+ if (!hcd->phy) {
+ struct usb_phy *phy = usb_get_phy_dev(hcd->self.controller, 0);
+
+ if (IS_ERR(phy)) {
+ retval = PTR_ERR(phy);
+ if (retval == -EPROBE_DEFER)
+ return retval;
+ } else {
+ retval = usb_phy_init(phy);
+ if (retval) {
+ usb_put_phy(phy);
+ return retval;
+ }
+ hcd->phy = phy;
+ hcd->remove_phy = 1;
+ }
+ }
+#endif
+
dev_info(hcd->self.controller, "%s\n", hcd->product_desc);
/* Keep old behaviour if authorized_default is not in [0, 1]. */
--
1.8.4
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