Re: [PATCH v13 net-next 05/15] net: mvpp2: add PPv23 version definition

[Russell King - ARM Linux admin]

On Thu, Feb 11, 2021 at 12:48:52PM +0200, stefanc@xxxxxxxxxxx wrote:
> From: Stefan Chulski <stefanc@xxxxxxxxxxx>
> 
> This patch add PPv23 version definition.
> PPv23 is new packet processor in CP115.
> Everything that supported by PPv22, also supported by PPv23.
> No functional changes in this stage.
> 
> Signed-off-by: Stefan Chulski <stefanc@xxxxxxxxxxx>
> Acked-by: Marcin Wojtas <mw@xxxxxxxxxxxx>

Reviewed-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxx>

> @@ -7049,6 +7049,11 @@ static int mvpp2_probe(struct platform_device *pdev)
>  			priv->port_map |= BIT(i);
>  	}
>  
> +	if (priv->hw_version != MVPP21) {
> +		if (mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
> +			priv->hw_version = MVPP23;
> +	}
> +

The only minor comment I have on this is... the formatting of the
above. Wouldn't:

	if (priv->hw_version >= MVPP22 &&
	    mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
		priv->hw_version = MVPP23;

read better?

Do we need to even check priv->hw_version here? Isn't this register
implemented in PPv2.1 where it contains the value zero?

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