u-boot/drivers/usb/ulpi/Kconfig
Ulf Magnusson a43aebee89 usb: ulpi: kconfig: Remove meaningless choice default
'default' on a choice refers to the symbol selected by default, not to
the choice mode, so 'default n' is meaningless.

No functional changes. Optional choices implicitly default to n mode
(and there is no way to make them default to another mode).

Discovered in Kconfiglib (https://github.com/ulfalizer/Kconfiglib),
which prints the following warning:

	warning: the default selection n (undefined) of <choice> (defined at drivers/usb/ulpi/Kconfig:3) is not contained in the choice

I've added a corresponding warning to the C tools too, which is
currently in linux-next: https://patchwork.kernel.org/patch/9983667/

Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
2018-02-05 20:58:12 -05:00

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comment "ULPI drivers"
choice
prompt "ULPI Viewport type"
optional
help
Select ULPI viewport (SoC-side interface to ULPI) implementation
appropriate for the device if you want to communicate with
UTMI (USB PHY) via ULPI interface.
config USB_ULPI_VIEWPORT
bool "Generic ULPI Viewport"
help
Support generic ULPI Viewport implementation that is used on
some Tegra and Snapdragon devices.
config USB_ULPI_VIEWPORT_OMAP
bool "OMAP ULPI Viewport"
help
Support ULPI Viewport implementation that is used on OMAP devices.
endchoice
config USB_ULPI
bool "ULPI support"
depends on (USB_ULPI_VIEWPORT || USB_ULPI_VIEWPORT_OMAP)
help
Select to commnicate with USB PHY via ULPI interface.
ULPI is wrapper on UTMI+ core that is used as
PHY Transreceiver for USB controllers.
This driver uses ULPI viewports that are specific for each SoC.