the user should only select it when the board supports HNP and SRP, it should NOT be selected if the board only supports dual-role switch through ID pin. There is a discussion for it: http://marc.info/?l=linux-arm-kernel&m=139994896101516&w=2 http://marc.info/?l=linux-usb&m=139994881701504&w=2 Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx> --- drivers/usb/core/Kconfig | 12 +++++++----- 1 files changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig index cb8e991..158048b 100644 --- a/drivers/usb/core/Kconfig +++ b/drivers/usb/core/Kconfig @@ -54,13 +54,15 @@ config USB_OTG default n help The most notable feature of USB OTG is support for a - "Dual-Role" device, which can act as either a device - or a host. The initial role is decided by the type of - plug inserted and can be changed later when two dual - role devices talk to each other. + otg device, which can act as either a device or a host. + The initial role is decided by the type of plug inserted + and can be changed using HNP (Host Negotiation Protocol) + later when two otg devices talk to each other. Select this only if your board has Mini-AB/Micro-AB - connector. + connector and supports HNP and SRP (Session Request Protocol). + If the board only supports dual-role switch through ID + pin, this configuration should not be selected. config USB_OTG_WHITELIST bool "Rely on OTG Targeted Peripherals List" -- 1.7.8 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
