linux-kernel - Re: [net-next PATCH v5 05/14] drivers: net: dsa: qca8k: add support for cpu port 6

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Message-ID: <0e1cc25d-b1d4-2b86-ab01-02c5e0013311@gmail.com>
Date:   Sun, 10 Oct 2021 19:01:11 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Ansuel Smith <ansuelsmth@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH v5 05/14] drivers: net: dsa: qca8k: add support
 for cpu port 6

For consistency with other patch subjects, drop the "drivers: " prefix.

On 10/10/2021 6:30 PM, Ansuel Smith wrote:
> Currently CPU port is always hardcoded to port 0. This switch have 2 CPU
> port. 

Plural: ports.

The original intention of this driver seems to be use the
> mac06_exchange bit to swap MAC0 with MAC6 in the strange configuration
> where device have connected only the CPU port 6. To skip the
> introduction of a new binding, rework the driver to address the
> secondary CPU port as primary and drop any reference of hardcoded port.
> With configuration of mac06 exchange, just skip the definition of port0
> and define the CPU port as a secondary. The driver will autoconfigure
> the switch to use that as the primary CPU port.
> 
> Signed-off-by: Ansuel Smith <ansuelsmth@...il.com>
> ---
>   drivers/net/dsa/qca8k.c | 50 +++++++++++++++++++++++++++++------------
>   drivers/net/dsa/qca8k.h |  2 --
>   2 files changed, 36 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
> index e335a4cfcb75..de50116d483e 100644
> --- a/drivers/net/dsa/qca8k.c
> +++ b/drivers/net/dsa/qca8k.c
> @@ -977,6 +977,22 @@ qca8k_setup_mac_pwr_sel(struct qca8k_priv *priv)
>   	return ret;
>   }
>   
> +static int qca8k_find_cpu_port(struct dsa_switch *ds)
> +{
> +	struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;

For new functions please avoid the cast from void * which is unnecessary.

With those comments addressed:

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian