freebsd-skq/sys/dev/gpio
adrian d143e961c0 Remove these locks - they aren't strictly needed and cause measurable
performance issues.

* Access to the GPIO bus is already locked by requesting
  and releasing the bus - thus the lock isn't really needed
  for each GPIO pin change.
* Don't lock and unlock the GPIO bus for -each- i2c access -
  the i2c bus code is already doing this by calling the upper
  layer callback to request/release the bus. This thus locks
  the bus for the entirety of the transaction.

TODO:

* Further verify that everything is correctly requesting/
  releasing the GPIO bus.
* Look at how to lock the GPIO pin configuration stuff,
  potentially by locking/unlocking the bus at the gpiobus
  layer.
2011-12-20 00:33:56 +00:00
..
gpio_if.m
gpiobus_if.m
gpiobus.c Rename device_delete_all_children() into device_delete_children(). 2011-11-22 21:56:55 +00:00
gpiobusvar.h
gpioc.c
gpioiic.c Remove these locks - they aren't strictly needed and cause measurable 2011-12-20 00:33:56 +00:00
gpioled.c