For instance, by adding a pca9547 device with address 0x70 to bus i2c-0, you get
/sys/class/i2c-dev/i2c-0/device/0-0070/channel-0 -> i2c-1 ... /sys/class/i2c-dev/i2c-0/device/0-0070/channel-7 -> i2c-8 Signed-off-by: Gerlando Falauto <[email protected]> --- drivers/i2c/i2c-mux.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c index 01b8f8e..c984862 100644 --- a/drivers/i2c/i2c-mux.c +++ b/drivers/i2c/i2c-mux.c @@ -96,6 +96,7 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent, { struct i2c_mux_priv *priv; int ret; + char symlink_name[12]; priv = kzalloc(sizeof(struct i2c_mux_priv), GFP_KERNEL); if (!priv) @@ -142,6 +143,17 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent, dev_info(&parent->dev, "Added multiplexed i2c bus %d\n", i2c_adapter_id(&priv->adap)); + snprintf(symlink_name, sizeof(symlink_name), "channel-%d", chan_id); + ret = sysfs_create_link(&parent_device->kobj, + &priv->adap.dev.kobj, + symlink_name); + if (ret) + dev_err(parent_device, "Failed creating symlink %s\n", + symlink_name); + else + dev_info(parent_device, "Created symlink %s\n", + symlink_name); + return &priv->adap; } EXPORT_SYMBOL_GPL(i2c_add_mux_adapter); @@ -150,6 +162,11 @@ int i2c_del_mux_adapter(struct i2c_adapter *adap) { struct i2c_mux_priv *priv = adap->algo_data; int ret; + char symlink_name[12]; + + snprintf(symlink_name, sizeof(symlink_name), "channel-%d", priv->chan_id); + + sysfs_delete_link(&adap->dev.parent->kobj, &priv->adap.dev.kobj, symlink_name); ret = i2c_del_adapter(adap); if (ret < 0) -- 1.7.10.1 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
