@@ -939,6 +939,25 @@ static int usbmisc_imx7ulp_init(struct imx_usbmisc_data *data)
return 0;
}
+static int usbmisc_imx6sx_power_lost_check(struct imx_usbmisc_data *data)
+{
+ struct imx_usbmisc *usbmisc = dev_get_drvdata(data->dev);
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&usbmisc->lock, flags);
+ val = readl(usbmisc->base + data->index * 4);
+ spin_unlock_irqrestore(&usbmisc->lock, flags);
+ /*
+ * Here use a power on reset value to judge
+ * if the controller experienced a power lost
+ */
+ if (val == 0x30001000)
+ return 1;
+ else
+ return 0;
+}
+
static const struct usbmisc_ops imx25_usbmisc_ops = {
.init = usbmisc_imx25_init,
.post = usbmisc_imx25_post,
@@ -972,6 +991,7 @@ static const struct usbmisc_ops imx6sx_usbmisc_ops = {
.init = usbmisc_imx6sx_init,
.hsic_set_connect = usbmisc_imx6_hsic_set_connect,
.hsic_set_clk = usbmisc_imx6_hsic_set_clk,
+ .power_lost_check = usbmisc_imx6sx_power_lost_check,
};
static const struct usbmisc_ops imx7d_usbmisc_ops = {