usb: phy: Add AM335x PHY driver

This driver is a redo of my earlier attempt. It uses parts of the
generic PHY driver and uses the new control driver for the register
the phy needs to power on/off the phy. It also enables easy access for
the wakeup register which is not yet implemented.
The difference between the omap attempt is:
- no static holding variable
- one global visible function which exports a struct with callbacks to
  access the "control" registers.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index f5ea339ec155..f41c3e12c6a7 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -86,6 +86,18 @@ config OMAP_USB3
           This driver interacts with the "OMAP Control USB Driver" to power
           on/off the PHY.
 
+config AM335X_CONTROL_USB
+        tristate
+
+config AM335X_PHY_USB
+        tristate "AM335x USB PHY Driver"
+        select USB_PHY
+        select AM335X_CONTROL_USB
+        select NOP_USB_XCEIV
+        help
+          This driver provides PHY support for that phy which part for the
+          AM335x SoC.
+
 config SAMSUNG_USBPHY
         tristate
         help