usb: Provide usb_speed_string() function
In a few places in the kernel, the code prints
a human-readable USB device speed (eg. "high speed").
This involves a switch statement sometimes wrapped
around in ({ ... }) block leading to code repetition.
To mitigate this issue, this commit introduces
usb_speed_string() function, which returns
a human-readable name of provided speed.
It also changes a few places switch was used to use
this new function. This changes a bit the way the
speed is printed in few instances at the same time
standardising it.
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 2651852..97c4cc7 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -12,6 +12,11 @@
if USB_SUPPORT
+config USB_COMMON
+ tristate
+ default y
+ depends on USB || USB_GADGET
+
# Host-side USB depends on having a host controller
# NOTE: dummy_hcd is always an option, but it's ignored here ...
# NOTE: SL-811 option should be board-specific ...