linux-kernel - Re: [PATCH net-next v2] net: phy: micrel: ksz9131 led errata workaround

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Message-ID: <YV8zfj3UUyq2WRPF@lunn.ch>
Date:   Thu, 7 Oct 2021 19:50:54 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Francesco Dolcini <francesco.dolcini@...adex.com>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        philippe.schenker@...adex.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] net: phy: micrel: ksz9131 led errata
 workaround

On Thu, Oct 07, 2021 at 06:45:35PM +0200, Francesco Dolcini wrote:
> Micrel KSZ9131 PHY LED behavior is not correct when configured in
> Individual Mode, LED1 (Activity LED) is in the ON state when there is
> no-link.
> 
> Workaround this by setting bit 9 of register 0x1e after verifying that
> the LED configuration is Individual Mode.
> 
> This issue is described in KSZ9131RNX Silicon Errata DS80000693B [*]
> and according to that it will not be corrected in a future silicon
> revision.
> 
> [*] https://ww1.microchip.com/downloads/en/DeviceDoc/KSZ9131RNX-Silicon-Errata-and-Data-Sheet-Clarification-80000863B.pdf
> 
> Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew