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Date:   Tue, 14 Apr 2020 09:15:37 +0000
From:   Jose Abreu <>
To:     Julien Beraud <>,
        Giuseppe Cavallaro <>,
        Alexandre Torgue <>,
        "David S . Miller" <>
CC:     "" <>
Subject: RE: [PATCH 2/2] net: stmmac: Fix sub-second increment

From: Julien Beraud <>
Date: Apr/14/2020, 10:10:03 (UTC+00:00)

> This will also
> work for frequencies below 50MHz (for instance using the internal osc1
> clock at 25MHz for socfpga platforms).

No please. Per HW specifications the minimum value for PTP reference clock 
is 50MHz. If this does not work in your setup you'll need to add some kind 
of quirk to stmmac instead of changing the existing logic which works fine 
in all other setups.

Jose Miguel Abreu

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