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

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BugLink: https://bugs.launchpad.net/bugs/2097301

[ Upstream commit 43457ada98c824f310adb7bd96bd5f2fcd9a3279 ]

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: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
This commit is contained in:
Hans de Goede
2024-08-12 22:39:48 +02:00
committed by Mehmet Basaran
parent b007ff2d80
commit 5c1501e1aa
1 changed files with 8 additions and 1 deletions
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drivers/i2c/busses/i2c-i801.c
+8 -1
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@@ -1732,8 +1732,15 @@ 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);