[Raspbian-devel] [linux-sunxi] Raspbian - Indicating ethernet activity using a GPIO attached LED.

[Christopher Obbard]

Hi John,

The sunxi mailing list probably isn't the best place for this query.

But have a look at:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/leds/leds-class.txt

You can set the trigger property of the LED thru sysfs.


Cheers!

Chris

On 1 July 2018 at 12:53, John W. Kitz <John.Kitz-hob at xs4all.nl> wrote:
> Hi,
>
> I've posted this on a Raspbian email list, but have gotten little response.
> So I thought I'd give it a try here.
>
> While I haven't tried any of this, having looked at the documentation
> pertaining to the Pi's device tree implementation[1], [2], particularly:
>
> act_led_trigger    Choose which activity the LED tracks. Use "heartbeat" for
> a nice load indicator. (default "mmc")
>
> act_led_gpio       Set which GPIO to use for the activity LED (in case you
> want to connect it to an external device)
>                    (default "16" on a non-Plus board, "47" on a Plus or Pi
> 2) N.B. For Pi3 see pi3-act-led overlay
>
> [1]
> https://raw.githubusercontent.com/raspberrypi/firmware/master/boot/overlays/
> README
> [2]
> https://raspberrypi.stackexchange.com/questions/69674/are-there-other-act-le
> d-trigger-options-besides-mmc-and-heartbeat
>
> It ought to be possible to configure a Raspberry Pi such that one or more
> GPIO attached LEDs light or blink in a way that is indicative of the
> activity of certain parts of the hardware of a Raspberry Pi. Examples would
> be GPIO attached LEDs flashing on cpu-n usage, flashing on kernel panic,
> flashing on SD Card activity, flashing on wifi activity or flashing on
> bluetooth activity.
>
> The one thing I'm missing is the ability to have a GPIO attached LED flash
> on Ethernet activity.
>
> Where (driver, raspbian, both and/or somewhere else) would a change or
> changes have to be made to make this possible?
>
> Is there a place where feature requests, pertaining to changes that are
> outside of the scope of a typical user of a Pi, can be made?
>
> If yes, where?
>
> Regards, Jk.
>
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