usb: phy: add a new driver for usb3 phy

Added a driver for usb3 phy that handles the interaction between usb phy
device and dwc3 controller.

This also includes device tree support for usb3 phy driver and
the documentation with device tree binding information is updated.

Currently writing to control module register is taken care in this
driver which will be removed once the control module driver is in place.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Moiz Sonasath <m-sonasath@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/include/linux/usb/omap_usb.h b/include/linux/usb/omap_usb.h
index 3db9b5316b10..6ae29360e1d2 100644
--- a/include/linux/usb/omap_usb.h
+++ b/include/linux/usb/omap_usb.h
@@ -19,14 +19,26 @@
 #ifndef __DRIVERS_OMAP_USB2_H
 #define __DRIVERS_OMAP_USB2_H
 
+#include <linux/io.h>
 #include <linux/usb/otg.h>
 
+struct usb_dpll_params {
+        u16     m;
+        u8      n;
+        u8      freq:3;
+        u8      sd;
+        u32     mf;
+};
+
 struct omap_usb {
         struct usb_phy          phy;
         struct phy_companion    *comparator;
+        void __iomem            *pll_ctrl_base;
         struct device           *dev;
         struct device           *control_dev;
         struct clk              *wkupclk;
+        struct clk              *sys_clk;
+        struct clk              *optclk;
         u8                      is_suspended:1;
 };
 
@@ -41,4 +53,15 @@ static inline int omap_usb2_set_comparator(struct phy_companion *comparator)
 }
 #endif
 
+static inline u32 omap_usb_readl(void __iomem *addr, unsigned offset)
+{
+        return __raw_readl(addr + offset);
+}
+
+static inline void omap_usb_writel(void __iomem *addr, unsigned offset,
+        u32 data)
+{
+        __raw_writel(data, addr + offset);
+}
+
 #endif /* __DRIVERS_OMAP_USB_H */