Commit 2037f299 authored by Chunfeng Yun's avatar Chunfeng Yun Committed by Greg Kroah-Hartman
Browse files

usb: common: add helper to get role-switch-default-mode 



Add helper to get "role-switch-default-mode", and convert it
to the corresponding enum usb_dr_mode

Signed-off-by: default avatarChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1626340078-29111-6-git-send-email-chunfeng.yun@mediatek.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 72c1b91f

drivers/usb/common/common.c

+20 −0
Original line number Diff line number Diff line
@@ -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

include/linux/usb/otg.h

+1 −0
Original line number Diff line number Diff line
@@ -128,5 +128,6 @@ enum usb_dr_mode { 
 * and returns the corresponding 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 */