diff options
| author | George Spelvin <linux@horizon.com> | 2013-06-17 01:45:50 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-18 10:39:04 -0700 |
| commit | 035978beaf79e3bd0c4f6308e8c8ce5067e26b9d (patch) | |
| tree | be11142aa386d19c7a75130dee00f34b6fa593ac /drivers | |
| parent | 7d132055814ef17a6c7b69f342244c410a5e000f (diff) | |
usb: phy: Improve Kconfig help for CONFIG_USB_PHY
The previous text confused users by not describing the very common
(e.g. x86 PC) sitations where no PHY driver is necessary.
Signed-off-by: George Spelvin <linux@horizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/phy/Kconfig | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig index 7ef3eb8617a6..2311b1e4e43c 100644 --- a/drivers/usb/phy/Kconfig +++ b/drivers/usb/phy/Kconfig @@ -4,11 +4,17 @@ menuconfig USB_PHY bool "USB Physical Layer drivers" help - USB controllers (those which are host, device or DRD) need a - device to handle the physical layer signalling, commonly called - a PHY. + Most USB controllers have the physical layer signalling part + (commonly called a PHY) built in. However, dual-role devices + (a.k.a. USB on-the-go) which support being USB master or slave + with the same connector often use an external PHY. - The following drivers add support for such PHY devices. + The drivers in this submenu add support for such PHY devices. + They are not needed for standard master-only (or the vast + majority of slave-only) USB interfaces. + + If you're not sure if this applies to you, it probably doesn't; + say N here. if USB_PHY |