[Letux-kernel] [PATCH 2/3] DT: EVM: add LEDs

Tony Lindgren tony at atomide.com
Wed Sep 28 05:37:04 CEST 2016


* H. Nikolaus Schaller <hns at goldelico.com> [160927 13:11]:
> > Am 27.09.2016 um 21:49 schrieb Tony Lindgren <tony at atomide.com>:
> > How about this for defaults:
> > 
> > - heartbeat for led3
> > - cpu0 for led4
> > - cpu1 for led5
> 
> Good idea. Will try.
> 
> What I don't exactly know is if these gpios based on an I2C-expander
> can handle cpu activity triggers or if they are locked up if this i2c
> processing triggers another cpu activity...

Oh right, if the GPIOs are on the i2c bus it's probably not a good
idea :) Or at least will be inaccurate if the bus can sleep.

Regards,

Tony


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