summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorGeorge Spelvin <linux@horizon.com>2013-06-17 01:45:50 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-06-18 10:39:04 -0700
commit035978beaf79e3bd0c4f6308e8c8ce5067e26b9d (patch)
treebe11142aa386d19c7a75130dee00f34b6fa593ac
parent7d132055814ef17a6c7b69f342244c410a5e000f (diff)
downloadlinux-035978beaf79e3bd0c4f6308e8c8ce5067e26b9d.tar.bz2
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>
-rw-r--r--drivers/usb/phy/Kconfig14
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