Re: [PATCH v5 4/4] net: stmmac: Update the name of property 'clk_csr'

[AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>]

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@mediatek.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.