linux-kernel - Re: [PATCH v2] net: phy: dp83867: fix hfs boot in rgmii mode

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Message-Id: <20191207.115754.627115468855491396.davem@davemloft.net>
Date:   Sat, 07 Dec 2019 11:57:54 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     grygorii.strashko@...com
Cc:     netdev@...r.kernel.org, andrew@...n.ch, f.fainelli@...il.com,
        nsekhar@...com, linux-kernel@...r.kernel.org, hkallweit1@...il.com
Subject: Re: [PATCH v2] net: phy: dp83867: fix hfs boot in rgmii mode

From: Grygorii Strashko <grygorii.strashko@...com>
Date: Fri, 6 Dec 2019 14:34:32 +0200

> The commit ef87f7da6b28 ("net: phy: dp83867: move dt parsing to probe")
> causes regression on TI dra71x-evm and dra72x-evm, where DP83867 PHY is
> used in "rgmii-id" mode - the networking stops working.
> Unfortunately, it's not enough to just move DT parsing code to .probe() as
> it depends on phydev->interface value, which is set to correct value abter
> the .probe() is completed and before calling .config_init(). So, RGMII
> configuration can't be loaded from DT.
> 
> To fix and issue
> - move RGMII validation code to .config_init()
> - parse RGMII parameters in dp83867_of_init(), but consider them as
> optional.
> 
> Fixes: ef87f7da6b28 ("net: phy: dp83867: move dt parsing to probe")
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> ---
> v2:
>  - fixed comments in code

Applied.