From 73e33008e865e5a7b79282331c2d6e920d5d47f8 Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Tue, 25 May 2021 16:53:05 +0800 Subject: usb: roles: add helper usb_role_string() Introduces usb_role_string() function, which returns a human-readable name of provided usb role, it's useful to make the log readable. Reviewed-by: Heikki Krogerus Signed-off-by: Chunfeng Yun Link: https://lore.kernel.org/r/1621932786-9335-1-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/roles/class.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/usb/roles') diff --git a/drivers/usb/roles/class.c b/drivers/usb/roles/class.c index 33b637d0d8d9..dfaed7eee94f 100644 --- a/drivers/usb/roles/class.c +++ b/drivers/usb/roles/class.c @@ -214,6 +214,15 @@ static const char * const usb_roles[] = { [USB_ROLE_DEVICE] = "device", }; +const char *usb_role_string(enum usb_role role) +{ + if (role < 0 || role >= ARRAY_SIZE(usb_roles)) + return "unknown"; + + return usb_roles[role]; +} +EXPORT_SYMBOL_GPL(usb_role_string); + static ssize_t role_show(struct device *dev, struct device_attribute *attr, char *buf) { -- cgit v1.2.3