MLK-22280-2 usb: chipidea: usbmisc: remove mutex

Now charger detection is only for iMX7 which has separated
register area for each instance, register access is protected
by spinlock among APIs, so we can remove the mutex.

Acked-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Li Jun <jun.li@nxp.com>

diff --git a/drivers/usb/chipidea/usbmisc_imx.c b/drivers/usb/chipidea/usbmisc_imx.c
index 1939e19..34321d2 100644 (file)
--- a/drivers/usb/chipidea/usbmisc_imx.c
+++ b/drivers/usb/chipidea/usbmisc_imx.c
@@ -180,7 +180,6 @@ struct imx_usbmisc {
        void __iomem *base;
        spinlock_t lock;
        const struct usbmisc_ops *ops;
-       struct mutex mutex;
 };
 
 static struct regulator *vbus_wakeup_reg;
@@ -1094,7 +1093,6 @@ int imx_usbmisc_charger_detection(struct imx_usbmisc_data *data, bool connect)
        if (!usbmisc->ops->charger_detection)
                return -ENOTSUPP;
 
-       mutex_lock(&usbmisc->mutex);
        if (connect) {
                ret = usbmisc->ops->charger_detection(data);
                if (ret) {
@@ -1109,7 +1107,6 @@ int imx_usbmisc_charger_detection(struct imx_usbmisc_data *data, bool connect)
                usb_phy->chg_state = USB_CHARGER_ABSENT;
                usb_phy->chg_type = UNKNOWN_TYPE;
        }
-       mutex_unlock(&usbmisc->mutex);
        return ret;
 }
 EXPORT_SYMBOL_GPL(imx_usbmisc_charger_detection);
@@ -1235,7 +1232,6 @@ static int usbmisc_imx_probe(struct platform_device *pdev)
                return -ENOMEM;
 
        spin_lock_init(&data->lock);
-       mutex_init(&data->mutex);
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        data->base = devm_ioremap_resource(&pdev->dev, res);