Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Thu, 19 Jan 2023 14:56:52 +0100
From:   Andrew Lunn <andrew@lunn.ch>
To:     Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc:     Jakub Kicinski <kuba@kernel.org>,
        Woojung Huh <woojung.huh@microchip.com>,
        UNGLinuxDriver@microchip.com,
        Florian Fainelli <f.fainelli@gmail.com>,
        Vladimir Oltean <olteanv@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Arun Ramadoss <arun.ramadoss@microchip.com>,
        kernel@pengutronix.de, Oleksij Rempel <ore@pengutronix.de>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH net] net: dsa: microchip: fix probe of I2C-connected
 KSZ8563
Message-ID: <Y8lMJI+SnnfxVMVe@lunn.ch>
References: <20230119131014.1228773-1-a.fatoum@pengutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230119131014.1228773-1-a.fatoum@pengutronix.de>
Precedence: bulk

On Thu, Jan 19, 2023 at 02:10:15PM +0100, Ahmad Fatoum wrote:
> Starting with commit eee16b147121 ("net: dsa: microchip: perform the
> compatibility check for dev probed"), the KSZ switch driver now bails
> out if it thinks the DT compatible doesn't match the actual chip:
> 
>   ksz9477-switch 1-005f: Device tree specifies chip KSZ9893 but found
>   KSZ8563, please fix it!
> 
> Problem is that the "microchip,ksz8563" compatible is associated
> with ksz_switch_chips[KSZ9893]. Same issue also affected the SPI driver
> for the same switch chip and was fixed in commit b44908095612
> ("net: dsa: microchip: add separate struct ksz_chip_data for KSZ8563 chip").
> 
> Reuse ksz_switch_chips[KSZ8563] introduced in aforementioned commit
> to get I2C-connected KSZ8563 probing again.
> 
> Fixes: eee16b147121 ("net: dsa: microchip: perform the compatibility check for dev probed")
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>

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

    Andrew