Blinky leds can be the first visible sign of progress! ;)
Which includes pushing their code into mainline ... and getting
acks (as you noted elsewhere) from the subsystem maintainer to
help avoid going too far astray.
In some cases that implies getting some new frameworks into mainline,
or updating the ones that are there. The ALSA-SOC stuff has been
a win there, in terms of maintainable code ... the previous solution
involved very little reuse of the funky codec and data stream code,
while now that's far more practical.
Similarly I2C driver model support, GPIO expander infrastructure,
and SPI: instead of scattering board-specific code in drivers all
over the source tree, it can now be split out fairly cleanly. That
makes maintainers much happier.
- Dave
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