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Date:   Fri, 23 Sep 2022 11:10:49 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Jianguo Zhang <jianguo.zhang@...iatek.com>,
        "David S . Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Biao Huang <biao.huang@...iatek.com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v5 4/4] net: stmmac: Update the name of property 'clk_csr'

Il 23/09/22 07:28, Jianguo Zhang ha scritto:
> Update the name of property 'clk_csr' as 'snps,clk-csr' to align with
> the property name in the binding file.
> 
> Signed-off-by: Jianguo Zhang <jianguo.zhang@...iatek.com>
> ---
>   drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index 9f5cac4000da..18f9952d667f 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -444,7 +444,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
>   	 * or get clk_csr from device tree.
>   	 */
>   	plat->clk_csr = -1;
> -	of_property_read_u32(np, "clk_csr", &plat->clk_csr);
> +	of_property_read_u32(np, "snps,clk-csr", &plat->clk_csr);

This is going to break MT2712e on old devicetrees.

The right way of doing that is to check the return value of of_property_read_u32()
for "snps,clk-csr": if the property is not found, fall back to the old "clk_csr".

Regards,
Angelo

>   
>   	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
>   	 * and warn of its use. Remove this when phy node support is added.


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