usb: misc: usb3503: Clean up on driver unbind

The driver should clean up after itself by unpreparing the clock when it
is unbound.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index 0cf2987b322f..8e7737d7ac0a 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -330,6 +330,17 @@ static int usb3503_i2c_probe(struct i2c_client *i2c,
         return usb3503_probe(hub);
 }
 
+static int usb3503_i2c_remove(struct i2c_client *i2c)
+{
+        struct usb3503 *hub;
+
+        hub = i2c_get_clientdata(i2c);
+        if (hub->clk)
+                clk_disable_unprepare(hub->clk);
+
+        return 0;
+}
+
 static int usb3503_platform_probe(struct platform_device *pdev)
 {
         struct usb3503 *hub;
@@ -343,6 +354,17 @@ static int usb3503_platform_probe(struct platform_device *pdev)
         return usb3503_probe(hub);
 }
 
+static int usb3503_platform_remove(struct platform_device *pdev)
+{
+        struct usb3503 *hub;
+
+        hub = platform_get_drvdata(pdev);
+        if (hub->clk)
+                clk_disable_unprepare(hub->clk);
+
+        return 0;
+}
+
 #ifdef CONFIG_PM_SLEEP
 static int usb3503_i2c_suspend(struct device *dev)
 {
@@ -396,6 +418,7 @@ static struct i2c_driver usb3503_i2c_driver = {
                 .of_match_table = of_match_ptr(usb3503_of_match),
         },
         .probe          = usb3503_i2c_probe,
+        .remove         = usb3503_i2c_remove,
         .id_table       = usb3503_id,
 };
 
@@ -405,6 +428,7 @@ static struct platform_driver usb3503_platform_driver = {
                 .of_match_table = of_match_ptr(usb3503_of_match),
         },
         .probe          = usb3503_platform_probe,
+        .remove         = usb3503_platform_remove,
 };
 
 static int __init usb3503_init(void)