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path: root/drivers/usb/cdns3/cdns3-imx.c
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Diffstat (limited to 'drivers/usb/cdns3/cdns3-imx.c')
-rw-r--r--drivers/usb/cdns3/cdns3-imx.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/usb/cdns3/cdns3-imx.c b/drivers/usb/cdns3/cdns3-imx.c
index 8f88eec0b0ea..74e758dc0895 100644
--- a/drivers/usb/cdns3/cdns3-imx.c
+++ b/drivers/usb/cdns3/cdns3-imx.c
@@ -361,6 +361,39 @@ static int cdns_imx_suspend(struct device *dev)
return 0;
}
+
+
+/* Indicate if the controller was power lost before */
+static inline bool cdns_imx_is_power_lost(struct cdns_imx *data)
+{
+ u32 value;
+
+ value = cdns_imx_readl(data, USB3_CORE_CTRL1);
+ if ((value & SW_RESET_MASK) == ALL_SW_RESET)
+ return true;
+ else
+ return false;
+}
+
+static int __maybe_unused cdns_imx_system_resume(struct device *dev)
+{
+ struct cdns_imx *data = dev_get_drvdata(dev);
+ int ret;
+
+ ret = cdns_imx_resume(dev);
+ if (ret)
+ return ret;
+
+ if (cdns_imx_is_power_lost(data)) {
+ dev_dbg(dev, "resume from power lost\n");
+ ret = cdns_imx_noncore_init(data);
+ if (ret)
+ cdns_imx_suspend(dev);
+ }
+
+ return ret;
+}
+
#else
static int cdns_imx_platform_suspend(struct device *dev,
bool suspend, bool wakeup)
@@ -372,6 +405,7 @@ static int cdns_imx_platform_suspend(struct device *dev,
static const struct dev_pm_ops cdns_imx_pm_ops = {
SET_RUNTIME_PM_OPS(cdns_imx_suspend, cdns_imx_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(cdns_imx_suspend, cdns_imx_system_resume)
};
static const struct of_device_id cdns_imx_of_match[] = {