net: dsa: microchip: Add LAN9646 switch support to KSZ DSA driver

LAN9646 switch is a 6-port switch with functions like KSZ9897.  It has
4 internal PHYs and 1 SGMII port.  The chip id read from hardware is
same as KSZ9477, so software driver needs to create a new chip id and
group allowable functions under its chip data structure to
differentiate the product.

Signed-off-by: Tristram Ha <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/dsa/microchip/ksz_spi.c b/drivers/net/dsa/microchip/ksz_spi.c
index 1c6652f2b9fe..108a958dc356 100644
--- a/drivers/net/dsa/microchip/ksz_spi.c
+++ b/drivers/net/dsa/microchip/ksz_spi.c
@@ -54,6 +54,8 @@ static int ksz_spi_probe(struct spi_device *spi)
 	if (!chip)
 		return -EINVAL;
 
+	/* Save chip id to do special initialization when probing. */
+	dev->chip_id = chip->chip_id;
 	if (chip->chip_id == KSZ88X3_CHIP_ID)
 		regmap_config = ksz8863_regmap_config;
 	else if (chip->chip_id == KSZ8795_CHIP_ID ||
@@ -203,6 +205,10 @@ static const struct of_device_id ksz_dt_ids[] = {
 		.compatible = "microchip,lan9374",
 		.data = &ksz_switch_chips[LAN9374]
 	},
+	{
+		.compatible = "microchip,lan9646",
+		.data = &ksz_switch_chips[LAN9646]
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, ksz_dt_ids);
@@ -228,6 +234,7 @@ static const struct spi_device_id ksz_spi_ids[] = {
 	{ "lan9372" },
 	{ "lan9373" },
 	{ "lan9374" },
+	{ "lan9646" },
 	{ },
 };
 MODULE_DEVICE_TABLE(spi, ksz_spi_ids);