linux-kernel - Re: [PATCH] net: phy: dp83867: fix get nvmem cell fail

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Message-ID: <Yu12E/NGEzCfPNVT@lunn.ch>
Date:   Fri, 5 Aug 2022 21:57:07 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Nikita Shubin <nikita.shubin@...uefel.me>
Cc:     linux@...ro.com, Nikita Shubin <n.shubin@...ro.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: phy: dp83867: fix get nvmem cell fail

On Fri, Aug 05, 2022 at 11:48:43AM +0300, Nikita Shubin wrote:
> From: Nikita Shubin <n.shubin@...ro.com>
> 
> If CONFIG_NVMEM is not set of_nvmem_cell_get, of_nvmem_device_get
> functions will return ERR_PTR(-EOPNOTSUPP) and "failed to get nvmem
> cell io_impedance_ctrl" error would be reported despite "io_impedance_ctrl"
> is completely missing in Device Tree and we should use default values.
> 
> Check -EOPNOTSUPP togather with -ENOENT to avoid this situation.

Should be 'together'

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

    Andrew