From: Gerlando Falauto <[email protected]> This makes the topology clearer. 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]> [wsa: simplified sysfs-usage and fixed format string usage] Signed-off-by: Wolfram Sang <[email protected]> Cc: Jean Delvare <[email protected]> Cc: Guenter Roeck <[email protected]> Cc: Martin Belanger <[email protected]> Cc: Rodolfo Giometti <[email protected]> Cc: Michael Lawnick <[email protected]> Cc: Jeroen De Wachter <[email protected]> --- drivers/i2c/i2c-mux.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c index f246a9f7dd22..593f7ca9adc7 100644 --- a/drivers/i2c/i2c-mux.c +++ b/drivers/i2c/i2c-mux.c @@ -110,6 +110,7 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent, void *, u32)) { struct i2c_mux_priv *priv; + char symlink_name[20]; int ret; priv = kzalloc(sizeof(struct i2c_mux_priv), GFP_KERNEL); @@ -186,6 +187,9 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent, WARN(sysfs_create_link(&priv->adap.dev.kobj, &mux_dev->kobj, "mux_device"), "can't create symlink to mux device\n"); + snprintf(symlink_name, sizeof(symlink_name), "channel-%u", chan_id); + WARN(sysfs_create_link(&mux_dev->kobj, &priv->adap.dev.kobj, symlink_name), + "can't create symlink for channel %u\n", chan_id); dev_info(&parent->dev, "Added multiplexed i2c bus %d\n", i2c_adapter_id(&priv->adap)); @@ -196,6 +200,10 @@ EXPORT_SYMBOL_GPL(i2c_add_mux_adapter); void i2c_del_mux_adapter(struct i2c_adapter *adap) { struct i2c_mux_priv *priv = adap->algo_data; + char symlink_name[20]; + + snprintf(symlink_name, sizeof(symlink_name), "channel-%u", priv->chan_id); + sysfs_remove_link(&adap->dev.parent->kobj, symlink_name); sysfs_remove_link(&priv->adap.dev.kobj, "mux_device"); i2c_del_adapter(adap); -- 2.1.1 -- 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
