linux-kernel - [PATCH net] net: dsa: microchip: fix probe of I2C-connected KSZ8563

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Date:   Thu, 19 Jan 2023 14:10:15 +0100
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Jakub Kicinski <kuba@...nel.org>,
        Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Arun Ramadoss <arun.ramadoss@...rochip.com>
Cc:     kernel@...gutronix.de, Oleksij Rempel <ore@...gutronix.de>,
        Ahmad Fatoum <a.fatoum@...gutronix.de>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net] net: dsa: microchip: fix probe of I2C-connected KSZ8563

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@...gutronix.de>
---
 drivers/net/dsa/microchip/ksz9477_i2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/microchip/ksz9477_i2c.c b/drivers/net/dsa/microchip/ksz9477_i2c.c
index c1a633ca1e6d..e315f669ec06 100644
--- a/drivers/net/dsa/microchip/ksz9477_i2c.c
+++ b/drivers/net/dsa/microchip/ksz9477_i2c.c
@@ -104,7 +104,7 @@ static const struct of_device_id ksz9477_dt_ids[] = {
 	},
 	{
 		.compatible = "microchip,ksz8563",
-		.data = &ksz_switch_chips[KSZ9893]
+		.data = &ksz_switch_chips[KSZ8563]
 	},
 	{
 		.compatible = "microchip,ksz9567",
-- 
2.30.2