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Date:   Tue, 25 Aug 2020 00:50:54 +0200
From:   Andrew Lunn <>
To:     Kurt Kanzenbach <>
Cc:     Vivien Didelot <>,
        Florian Fainelli <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,,
        Rob Herring <>,,
        Sebastian Andrzej Siewior <>,
        Richard Cochran <>,
        Kamil Alkhouri <>,, Vladimir Oltean <>
Subject: Re: [PATCH v3 6/8] net: dsa: hellcreek: Add PTP status LEDs

On Thu, Aug 20, 2020 at 10:11:16AM +0200, Kurt Kanzenbach wrote:
> The switch has two controllable I/Os which are usually connected to LEDs. This
> is useful to immediately visually see the PTP status.
> These provide two signals:
>  * is_gm
>    This LED can be activated if the current device is the grand master in that
>    PTP domain.
>  * sync_good
>    This LED can be activated if the current device is in sync with the network
>    time.
> Expose these via the LED framework to be controlled via user space
> e.g. linuxptp.
> Signed-off-by: Kurt Kanzenbach <>

Reviewed-by: Andrew Lunn <>


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