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@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
Changes in v4:
- Use a single snprintf() with a conditional argument for the 2 names
- Add a comment that the adapter-name is used by platform code
Changes in v3:
- This is a new patch in v3 of this patch-set
---
drivers/i2c/busses/i2c-i801.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 328c0dab6b14..299fe9d3afab 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1763,8 +1763,15 @@ 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);
--
2.46.0
