usb: phy: omap-usb2: enable 960Mhz clock for omap5

"usb_otg_ss_refclk960m" is needed for usb2 phy present in omap5. For
omap4, the clk_get of this clock will fail since it does not have this
clock.

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

1 files changed, 27 insertions, 1 deletions

diff --git a/drivers/usb/phy/omap-usb2.c b/drivers/usb/phy/omap-usb2.c
index 0cd88ac0e095..844ab68f08d0 100644
--- a/drivers/usb/phy/omap-usb2.c
+++ b/drivers/usb/phy/omap-usb2.c
@@ -166,6 +166,12 @@ static int omap_usb2_probe(struct platform_device *pdev)
         }
         clk_prepare(phy->wkupclk);
 
+        phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
+        if (IS_ERR(phy->optclk))
+                dev_vdbg(&pdev->dev, "unable to get refclk960m\n");
+        else
+                clk_prepare(phy->optclk);
+
         usb_add_phy_dev(&phy->phy);
 
         platform_set_drvdata(pdev, phy);
@@ -180,6 +186,8 @@ static int omap_usb2_remove(struct platform_device *pdev)
         struct omap_usb *phy = platform_get_drvdata(pdev);
 
         clk_unprepare(phy->wkupclk);
+        if (!IS_ERR(phy->optclk))
+                clk_unprepare(phy->optclk);
         usb_remove_phy(&phy->phy);
 
         return 0;
@@ -193,6 +201,8 @@ static int omap_usb2_runtime_suspend(struct device *dev)
         struct omap_usb *phy = platform_get_drvdata(pdev);
 
         clk_disable(phy->wkupclk);
+        if (!IS_ERR(phy->optclk))
+                clk_disable(phy->optclk);
 
         return 0;
 }
@@ -204,9 +214,25 @@ static int omap_usb2_runtime_resume(struct device *dev)
         struct omap_usb *phy = platform_get_drvdata(pdev);
 
         ret = clk_enable(phy->wkupclk);
-        if (ret < 0)
+        if (ret < 0) {
                 dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
+                goto err0;
+        }
+
+        if (!IS_ERR(phy->optclk)) {
+                ret = clk_enable(phy->optclk);
+                if (ret < 0) {
+                        dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
+                        goto err1;
+                }
+        }
+
+        return 0;
+
+err1:
+        clk_disable(phy->wkupclk);
 
+err0:
         return ret;
 }