diff options
| author | Robin Getz <rgetz@blackfin.uclinux.org> | 2008-03-05 23:17:38 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-04-24 21:16:40 -0700 |
| commit | 22552b286b44b8988e08fb74379507a9b32521b0 (patch) | |
| tree | b19e2da5cabbc9e1411f1c4f3b00ded44d6ae4bd /drivers/usb | |
| parent | b56394bf325820e9f338eaef2941f18b17b98098 (diff) | |
USB: partial USB embedded host support
This provides better support for USB "Embedded Host" functionality, which
is a subset of the USB OTG options:
* External hub support can be disabled;
* USB peripherals not whitelisted in "otg_whitelist.h" will be rejected
during enumeration.
These options can allow some savings in software and support.
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/Kconfig | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig index c15621d6457..fee864c9e62 100644 --- a/drivers/usb/core/Kconfig +++ b/drivers/usb/core/Kconfig @@ -111,14 +111,16 @@ config USB_OTG config USB_OTG_WHITELIST bool "Rely on OTG Targeted Peripherals List" - depends on USB_OTG - default y + depends on USB_OTG || EMBEDDED + default y if USB_OTG + default n if EMBEDDED help If you say Y here, the "otg_whitelist.h" file will be used as a product whitelist, so USB peripherals not listed there will be rejected during enumeration. This behavior is required by the USB OTG specification for all devices not on your product's - "Targeted Peripherals List". + "Targeted Peripherals List". "Embedded Hosts" are likewise + allowed to support only a limited number of peripherals. Otherwise, peripherals not listed there will only generate a warning and enumeration will continue. That's more like what @@ -127,9 +129,10 @@ config USB_OTG_WHITELIST config USB_OTG_BLACKLIST_HUB bool "Disable external hubs" - depends on USB_OTG + depends on USB_OTG || EMBEDDED help If you say Y here, then Linux will refuse to enumerate external hubs. OTG hosts are allowed to reduce hardware - and software costs by not supporting external hubs. + and software costs by not supporting external hubs. So + are "Emedded Hosts" that don't offer OTG support. |