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The Linux shell command echo 255 > brightness below turns on a green LED, presumably through I2C bus 1, and peripheral NXP PCA9533...

root@phyboard-mira-imx6-3:leds# ls
input2::capslock@  input2::compose@  input2::kana@  input2::numlock@  input2::scrolllock@  mira-blue@  mira-green@  mira-red@  mmc0::@  phycore-green@  user-led1@  user-led2@  user-led3@
root@phyboard-mira-imx6-3:leds# cd mira-green
root@phyboard-mira-imx6-3:mira-green# ls
device@  power/  subsystem@  brightness  max_brightness  trigger  uevent
root@phyboard-mira-imx6-3:mira-green# echo 255 > brightness

How do I find the underlying implementation's source code?

Online Linux source code browsers might or might not match what's actually running on this board. Need more hints.

本文标签： linuxHow to find code running under a command using sysfsStack Overflow

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