Re: [RFC usb-next v5 3/3] usb: core: hcd: integrate the PHY roothub wrapper

This integrates the PHY roothub wrapper into the core hcd
infrastructure. Multiple PHYs which are part of the roothub devicetree
node (which is a sub-node of the sysdev's node) are now managed
(= powered on/off when needed), by the new usb_phy_roothub code.

One example where this is required is the Amlogic GXL and GXM SoCs:
They are using a dwc3 USB controller with up to three ports enabled on
the internal roothub. Using only the top-level "phy" properties does not
work here since one can only specify one "usb2-phy" and one "usb3-phy",
while actually at least two "usb2-phy" have to be specified.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>
---
 drivers/usb/core/hcd.c  | 30 +++++++++++++++++++++++++++++-
 include/linux/usb/hcd.h |  1 +
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 67aa3d039b9b..56704dd10c15 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c

@@ -50,6 +50,7 @@
 #include <linux/usb/otg.h>
 
 #include "usb.h"
+#include "phy.h"
 
 
 /*-------------------------------------------------------------------------*/

@@ -2292,7 +2293,11 @@ int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg)
 		dev_dbg(&rhdev->dev, "bus %s fail, err %d\n",
 				"suspend", status);
 	}
-	return status;
+
+	if (status == 0)
+		return usb_phy_roothub_power_off(hcd->phy_roothub);