@@ -200,6 +200,26 @@ enum usb_dr_mode usb_get_dr_mode(struct device *dev)
}
EXPORT_SYMBOL_GPL(usb_get_dr_mode);
+/**
+ * usb_get_role_switch_default_mode - Get default mode for given device
+ * @dev: Pointer to the given device
+ *
+ * The function gets string from property 'role-switch-default-mode',
+ * and returns the corresponding enum usb_dr_mode.
+ */
+enum usb_dr_mode usb_get_role_switch_default_mode(struct device *dev)
+{
+ const char *str;
+ int ret;
+
+ ret = device_property_read_string(dev, "role-switch-default-mode", &str);
+ if (ret < 0)
+ return USB_DR_MODE_UNKNOWN;
+
+ return usb_get_dr_mode_from_string(str);
+}
+EXPORT_SYMBOL_GPL(usb_get_role_switch_default_mode);
+
/**
* usb_decode_interval - Decode bInterval into the time expressed in 1us unit
* @epd: The descriptor of the endpoint
@@ -128,5 +128,6 @@ enum usb_dr_mode {
* and returns the correspondig enum usb_dr_mode
*/
extern enum usb_dr_mode usb_get_dr_mode(struct device *dev);
+extern enum usb_dr_mode usb_get_role_switch_default_mode(struct device *dev);
#endif /* __LINUX_USB_OTG_H */
Add helper to get "role-switch-default-mode", and convert it to the corresponding enum usb_dr_mode Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- drivers/usb/common/common.c | 20 ++++++++++++++++++++ include/linux/usb/otg.h | 1 + 2 files changed, 21 insertions(+)