i2c: i801: Use a different adapter-name for IDF adapters

JIRA: https://issues.redhat.com/browse/RHEL-47426

commit 43457ad
Author: Hans de Goede <hdegoede@redhat.com>
Date:   Mon Aug 12 22:39:48 2024 +0200

    i2c: i801: Use a different adapter-name for IDF adapters

    On chipsets with a second 'Integrated Device Function' SMBus controller use
    a different adapter-name for the second IDF adapter.

    This allows platform glue code which is looking for the primary i801
    adapter to manually instantiate i2c_clients on to differentiate
    between the 2.

    This allows such code to find the primary i801 adapter by name, without
    needing to duplicate the PCI-ids to feature-flags mapping from i2c-i801.c.

    Reviewed-by: Pali Rohár <pali@kernel.org>
    Signed-off-by: Hans de Goede <hdegoede@redhat.com>
    Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
    Signed-off-by: Andi Shyti <andi.shyti@kernel.org>

Signed-off-by: David Arcari <darcari@redhat.com>

Author: darcari

drivers/i2c/busses/i2c-i801.c

@@ -1764,8 +1764,15 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 
 	i801_add_tco(priv);
 
+	/*
+	 * adapter.name is used by platform code to find the main I801 adapter
+	 * to instantiante i2c_clients, do not change.
+	 */
 	snprintf(priv->adapter.name, sizeof(priv->adapter.name),
-		"SMBus I801 adapter at %04lx", priv->smba);
+		 "SMBus %s adapter at %04lx",
+		 (priv->features & FEATURE_IDF) ? "I801 IDF" : "I801",
+		 priv->smba);
+
 	err = i2c_add_adapter(&priv->adapter);
 	if (err) {
 		platform_device_unregister(priv->tco_pdev);