usb: phy: s3c-hsotg: adding phy driver support

Adding the transceiver to hsotg driver. Keeping the platform data
for continuing the smooth operation for boards which still uses it

Signed-off-by: Praveen Paneri <p.paneri@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 27 insertions, 10 deletions

diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 141971d9051e..2143df358072 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -32,6 +32,7 @@
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
+#include <linux/usb/phy.h>
 #include <linux/platform_data/s3c-hsotg.h>
 
 #include <mach/map.h>
@@ -133,7 +134,9 @@ struct s3c_hsotg_ep {
  * struct s3c_hsotg - driver state.
  * @dev: The parent device supplied to the probe function
  * @driver: USB gadget driver
- * @plat: The platform specific configuration data.
+ * @phy: The otg phy transceiver structure for phy control.
+ * @plat: The platform specific configuration data. This can be removed once
+ * all SoCs support usb transceiver.
  * @regs: The memory area mapped for accessing registers.
  * @irq: The IRQ number we are using
  * @supplies: Definition of USB power supplies
@@ -153,6 +156,7 @@ struct s3c_hsotg_ep {
 struct s3c_hsotg {
         struct device            *dev;
         struct usb_gadget_driver *driver;
+        struct usb_phy          *phy;
         struct s3c_hsotg_plat    *plat;
 
         spinlock_t              lock;
@@ -2854,7 +2858,10 @@ static void s3c_hsotg_phy_enable(struct s3c_hsotg *hsotg)
         struct platform_device *pdev = to_platform_device(hsotg->dev);
 
         dev_dbg(hsotg->dev, "pdev 0x%p\n", pdev);
-        if (hsotg->plat->phy_init)
+
+        if (hsotg->phy)
+                usb_phy_init(hsotg->phy);
+        else if (hsotg->plat->phy_init)
                 hsotg->plat->phy_init(pdev, hsotg->plat->phy_type);
 }
 
@@ -2869,7 +2876,9 @@ static void s3c_hsotg_phy_disable(struct s3c_hsotg *hsotg)
 {
         struct platform_device *pdev = to_platform_device(hsotg->dev);
 
-        if (hsotg->plat->phy_exit)
+        if (hsotg->phy)
+                usb_phy_shutdown(hsotg->phy);
+        else if (hsotg->plat->phy_exit)
                 hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
 }
 
@@ -3493,6 +3502,7 @@ static void s3c_hsotg_release(struct device *dev)
 static int s3c_hsotg_probe(struct platform_device *pdev)
 {
         struct s3c_hsotg_plat *plat = pdev->dev.platform_data;
+        struct usb_phy *phy;
         struct device *dev = &pdev->dev;
         struct s3c_hsotg_ep *eps;
         struct s3c_hsotg *hsotg;
@@ -3501,20 +3511,27 @@ static int s3c_hsotg_probe(struct platform_device *pdev)
         int ret;
         int i;
 
-        plat = pdev->dev.platform_data;
-        if (!plat) {
-                dev_err(&pdev->dev, "no platform data defined\n");
-                return -EINVAL;
-        }
-
         hsotg = devm_kzalloc(&pdev->dev, sizeof(struct s3c_hsotg), GFP_KERNEL);
         if (!hsotg) {
                 dev_err(dev, "cannot get memory\n");
                 return -ENOMEM;
         }
 
+        phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
+        if (IS_ERR_OR_NULL(phy)) {
+                /* Fallback for pdata */
+                plat = pdev->dev.platform_data;
+                if (!plat) {
+                        dev_err(&pdev->dev, "no platform data or transceiver defined\n");
+                        return -EPROBE_DEFER;
+                } else {
+                        hsotg->plat = plat;
+                }
+        } else {
+                hsotg->phy = phy;
+        }
+
         hsotg->dev = dev;
-        hsotg->plat = plat;
 
         hsotg->clk = devm_clk_get(&pdev->dev, "otg");
         if (IS_ERR(hsotg->clk)) {