提交 c9449aff 编写于 作者: G Gerlando Falauto 提交者: Wolfram Sang

i2c: mux: create "channel-n" symlinks for child segments in the mux device

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: NGerlando Falauto <gerlando.falauto@keymile.com>
[wsa: simplified sysfs-usage and fixed format string usage]
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
Acked-by: NMartin Belanger <martin.belanger@cyaninc.com>
Acked-by: NDanielle Costantino <danielle.costantino@gmail.com>
上级 51cf3b0e
......@@ -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);
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册