usb: dwc3: add function of_usb_get_dr_mode

Signed-off-by: yinbo.zhu <yinbo.zhu@nxp.com>

2 files changed, 52 insertions, 0 deletions

diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index 5ef8da6..176dee0 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -105,6 +105,56 @@ static const char *const usb_dr_modes[] = {
 	[USB_DR_MODE_OTG]		= "otg",
 };
 
+/**
+ * of_usb_get_dr_mode - Get dual role mode for given device_node
+ * @np:        Pointer to the given device_node
+ *
+ * The function gets phy interface string from property 'dr_mode',
+ * and returns the correspondig enum usb_dr_mode
+ */
+enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
+{
+	const char *dr_mode;
+	int err, i;
+
+	err = of_property_read_string(np, "dr_mode", &dr_mode);
+	if (err < 0)
+		return USB_DR_MODE_UNKNOWN;
+
+	for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
+		if (!strcmp(dr_mode, usb_dr_modes[i]))
+			return i;
+
+	return USB_DR_MODE_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(of_usb_get_dr_mode);
+
+/**
+ * of_usb_get_maximum_speed - Get maximum requested speed for a given USB
+ * controller.
+ * @np: Pointer to the given device_node
+ *
+ * The function gets the maximum speed string from property "maximum-speed",
+ * and returns the corresponding enum usb_device_speed.
+ */
+enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np)
+{
+	const char *maximum_speed;
+	int err;
+	int i;
+
+	err = of_property_read_string(np, "maximum-speed", &maximum_speed);
+	if (err < 0)
+		return USB_SPEED_UNKNOWN;
+
+	for (i = 0; i < ARRAY_SIZE(speed_names); i++)
+		if (strcmp(maximum_speed, speed_names[i]) == 0)
+			return i;
+
+		return USB_SPEED_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(of_usb_get_maximum_speed);
+
 static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str)
 {
 	int ret;
diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h
index 5ff9032..2a57e0d 100644
--- a/include/linux/usb/of.h
+++ b/include/linux/usb/of.h
@@ -11,6 +11,8 @@
 #include <linux/usb/otg.h>
 #include <linux/usb/phy.h>
 
+enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np);
+
 #if IS_ENABLED(CONFIG_OF)
 enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0);
 bool of_usb_host_tpl_support(struct device_node *np);