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

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Message-ID: <20160928033703.erwozguik4rie3cn@atomide.com>
Date:   Tue, 27 Sep 2016 20:37:04 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     "H. Nikolaus Schaller" <hns@...delico.com>
Cc:     Benoît Cousson <bcousson@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, letux-kernel@...nphoenux.org
Subject: Re: [PATCH 2/3] DT: EVM: add LEDs

* H. Nikolaus Schaller <hns@...delico.com> [160927 13:11]:
> > Am 27.09.2016 um 21:49 schrieb Tony Lindgren <tony@...mide.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