linux-kernel - Re: [PATCH 1/2] net: phy: adin1100: Fix software power-down ready condition

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Message-ID: <aR3Ebs6gdra4qGzo@shell.armlinux.org.uk>
Date: Wed, 19 Nov 2025 13:21:50 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Alexander Dahl <ada@...rsis.com>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Alexandru Tachici <alexandru.tachici@...log.com>,
	Alexandru Ardelean <alexandru.ardelean@...log.com>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] net: phy: adin1100: Fix software power-down ready
 condition

On Wed, Nov 19, 2025 at 01:47:36PM +0100, Alexander Dahl wrote:
> Value CRSM_SFT_PD written to Software Power-Down Control Register
> (CRSM_SFT_PD_CNTRL) is 0x01 and therefor different to value
> CRSM_SFT_PD_RDY (0x02) read from System Status Register (CRSM_STAT) for
> confirmation powerdown has been reached.
> 
> The condition could have only worked when disabling powerdown
> (both 0x00), but never when enabling it (0x01 != 0x02).
> 
> Result is a timeout, like so:
> 
>     $ ifdown eth0
>     macb f802c000.ethernet eth0: Link is Down
>     ADIN1100 f802c000.ethernet-ffffffff:01: adin_set_powerdown_mode failed: -110
>     ADIN1100 f802c000.ethernet-ffffffff:01: adin_set_powerdown_mode failed: -110
> 
> Fixes: 7eaf9132996a ("net: phy: adin1100: Add initial support for ADIN1100 industrial PHY")
> Signed-off-by: Alexander Dahl <ada@...rsis.com>

Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>

Thanks!

-- 
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