which drivers subdirs should be automatically selected?

[Robert P. J. Day]

drivers/Makefile:

obj-y   += net/
obj-y   += serial/
obj-y   += nand/
obj-y   += nor/
obj-y   += usb/
obj-$(CONFIG_SPI) += spi/
obj-$(CONFIG_I2C) += i2c/
obj-$(CONFIG_VIDEO) += video/


  is there a fundamental reason that some of those subdirs are
auto-selected, while others are based on a CONFIG variable?  asked
another way, are there some driver subdirs that are so fundamentally
required that they *should* be auto-selected, or should *everything*
be a user-selectable choice?  the above just seems slightly
inconsistent and non-obvious.

rday
--

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Robert P. J. Day                               Waterloo, Ontario, CANADA

            Linux Consulting, Training and Kernel Pedantry.

Web page:                                          http://crashcourse.ca
Twitter:                                       http://twitter.com/rpjday
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