usb: phy: omap: Add omap-control Support for AM437x

This adds omap control module support for USBSS in AM437x SoC.
Update DT binding information to reflect these changes.

Acked-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

3 files changed, 27 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/usb/omap-usb.txt b/Documentation/devicetree/bindings/usb/omap-usb.txt
index 090e5e22bd2b..c495135115cb 100644
--- a/Documentation/devicetree/bindings/usb/omap-usb.txt
+++ b/Documentation/devicetree/bindings/usb/omap-usb.txt
@@ -87,6 +87,8 @@ Required properties:
                         e.g. USB3 PHY and SATA PHY on OMAP5.
  "ti,control-phy-dra7usb2" - if it has power down register like USB2 PHY on
                         DRA7 platform.
+ "ti,control-phy-am437usb2" - if it has power down register like USB2 PHY on
+                        AM437 platform.
  - reg : Address and length of the register set for the device. It contains
    the address of "otghs_control" for control-phy-otghs or "power" register
    for other types.
diff --git a/drivers/usb/phy/phy-omap-control.c b/drivers/usb/phy/phy-omap-control.c
index 09c5ace1edd8..e7253182e47d 100644
--- a/drivers/usb/phy/phy-omap-control.c
+++ b/drivers/usb/phy/phy-omap-control.c
@@ -84,6 +84,20 @@ void omap_control_usb_phy_power(struct device *dev, int on)
                 else
                         val |= OMAP_CTRL_USB2_PHY_PD;
                 break;
+
+        case OMAP_CTRL_TYPE_AM437USB2:
+                if (on) {
+                        val &= ~(AM437X_CTRL_USB2_PHY_PD |
+                                        AM437X_CTRL_USB2_OTG_PD);
+                        val |= (AM437X_CTRL_USB2_OTGVDET_EN |
+                                        AM437X_CTRL_USB2_OTGSESSEND_EN);
+                } else {
+                        val &= ~(AM437X_CTRL_USB2_OTGVDET_EN |
+                                        AM437X_CTRL_USB2_OTGSESSEND_EN);
+                        val |= (AM437X_CTRL_USB2_PHY_PD |
+                                         AM437X_CTRL_USB2_OTG_PD);
+                }
+                break;
         default:
                 dev_err(dev, "%s: type %d not recognized\n",
                                         __func__, control_usb->type);
@@ -197,6 +211,7 @@ static const enum omap_control_usb_type otghs_data = OMAP_CTRL_TYPE_OTGHS;
 static const enum omap_control_usb_type usb2_data = OMAP_CTRL_TYPE_USB2;
 static const enum omap_control_usb_type pipe3_data = OMAP_CTRL_TYPE_PIPE3;
 static const enum omap_control_usb_type dra7usb2_data = OMAP_CTRL_TYPE_DRA7USB2;
+static const enum omap_control_usb_type am437usb2_data = OMAP_CTRL_TYPE_AM437USB2;
 
 static const struct of_device_id omap_control_usb_id_table[] = {
         {
@@ -215,6 +230,10 @@ static const struct of_device_id omap_control_usb_id_table[] = {
                 .compatible = "ti,control-phy-dra7usb2",
                 .data = &dra7usb2_data,
         },
+        {
+                .compatible = "ti,control-phy-am437usb2",
+                .data = &am437usb2_data,
+        },
         {},
 };
 MODULE_DEVICE_TABLE(of, omap_control_usb_id_table);
diff --git a/include/linux/usb/omap_control_usb.h b/include/linux/usb/omap_control_usb.h
index 596b01918813..69ae383ee3cc 100644
--- a/include/linux/usb/omap_control_usb.h
+++ b/include/linux/usb/omap_control_usb.h
@@ -24,6 +24,7 @@ enum omap_control_usb_type {
         OMAP_CTRL_TYPE_USB2,    /* USB2_PHY, power down in CONTROL_DEV_CONF */
         OMAP_CTRL_TYPE_PIPE3,   /* PIPE3 PHY, DPLL & seperate Rx/Tx power */
         OMAP_CTRL_TYPE_DRA7USB2, /* USB2 PHY, power and power_aux e.g. DRA7 */
+        OMAP_CTRL_TYPE_AM437USB2, /* USB2 PHY, power e.g. AM437x */
 };
 
 struct omap_control_usb {
@@ -64,6 +65,11 @@ enum omap_control_usb_mode {
 
 #define OMAP_CTRL_USB2_PHY_PD           BIT(28)
 
+#define AM437X_CTRL_USB2_PHY_PD         BIT(0)
+#define AM437X_CTRL_USB2_OTG_PD         BIT(1)
+#define AM437X_CTRL_USB2_OTGVDET_EN     BIT(19)
+#define AM437X_CTRL_USB2_OTGSESSEND_EN  BIT(20)
+
 #if IS_ENABLED(CONFIG_OMAP_CONTROL_USB)
 extern void omap_control_usb_phy_power(struct device *dev, int on);
 extern void omap_control_usb_set_mode(struct device *dev,