[PATCH 2/6] usb: chipidea: usb2: add optional reset support

[Junzhong Pan]

The USB2 controller of SpacemiT K1 SoC requires reset support, to keep
compatibility, add optional reset support.

Signed-off-by: Junzhong Pan <panjunzhong at linux.spacemit.com>
---
 drivers/usb/chipidea/ci_hdrc_usb2.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/usb/chipidea/ci_hdrc_usb2.c b/drivers/usb/chipidea/ci_hdrc_usb2.c
index 8ffa1e95d8e8..00d575cd2955 100644
--- a/drivers/usb/chipidea/ci_hdrc_usb2.c
+++ b/drivers/usb/chipidea/ci_hdrc_usb2.c
@@ -12,6 +12,7 @@
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
+#include <linux/reset.h>
 #include <linux/usb/chipidea.h>
 #include <linux/usb/hcd.h>
 #include <linux/usb/ulpi.h>
@@ -21,6 +22,7 @@
 struct ci_hdrc_usb2_priv {
 	struct platform_device	*ci_pdev;
 	struct clk		*clk;
+	struct reset_control	*reset;
 };
 
 static const struct ci_hdrc_platform_data ci_default_pdata = {
@@ -80,6 +82,12 @@ static int ci_hdrc_usb2_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	priv->reset = devm_reset_control_get_optional_exclusive_deasserted(dev, NULL);
+	if (IS_ERR(priv->reset)) {
+		ret = PTR_ERR(priv->reset);
+		goto clk_err;
+	}
+
 	ci_pdata->name = dev_name(dev);
 
 	priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource,

-- 
2.34.1