From fb95c7cf5600b7b74412f27dfb39a1e13fd8a90d Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Mon, 8 Mar 2021 10:52:05 +0800 Subject: usb: common: add function to get interval expressed in us unit Add a new function to convert bInterval into the time expressed in 1us unit. Signed-off-by: Chunfeng Yun Link: https://lore.kernel.org/r/25c8a09b055f716c1e5bf11fea72c3418f844482.1615170625.git.chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman --- include/linux/usb/ch9.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux') diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h index abdd310c77f0..74debc824645 100644 --- a/include/linux/usb/ch9.h +++ b/include/linux/usb/ch9.h @@ -90,6 +90,9 @@ extern enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev); */ extern const char *usb_state_string(enum usb_device_state state); +unsigned int usb_decode_interval(const struct usb_endpoint_descriptor *epd, + enum usb_device_speed speed); + #ifdef CONFIG_TRACING /** * usb_decode_ctrl - Returns human readable representation of control request. -- cgit v1.2.3