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net: usb: qmi_wwan: add qmap id sysfs file for qmimux interfaces

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Add qmimux interface sysfs file qmap/mux_id to show qmap id set
during the interface creation, in order to provide a method for
userspace to associate QMI control channels to network interfaces.

Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Acked-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Daniele Palmas 2021-01-27 16:34:32 +01:00 committed by Jakub Kicinski
parent d7a177ea8f
commit e594ad980e
1 changed files with 24 additions and 0 deletions
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24
drivers/net/usb/qmi_wwan.c
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@ -218,6 +218,28 @@ skip:
return 1;
}
static ssize_t mux_id_show(struct device *d, struct device_attribute *attr, char *buf)
{
struct net_device *dev = to_net_dev(d);
struct qmimux_priv *priv;
priv = netdev_priv(dev);
return sysfs_emit(buf, "0x%02x\n", priv->mux_id);
}
static DEVICE_ATTR_RO(mux_id);
static struct attribute *qmi_wwan_sysfs_qmimux_attrs[] = {
&dev_attr_mux_id.attr,
NULL,
};
static struct attribute_group qmi_wwan_sysfs_qmimux_attr_group = {
.name = "qmap",
.attrs = qmi_wwan_sysfs_qmimux_attrs,
};
static int qmimux_register_device(struct net_device *real_dev, u8 mux_id)
{
struct net_device *new_dev;
@ -240,6 +262,8 @@ static int qmimux_register_device(struct net_device *real_dev, u8 mux_id)
goto out_free_newdev;
}
new_dev->sysfs_groups[0] = &qmi_wwan_sysfs_qmimux_attr_group;
err = register_netdevice(new_dev);
if (err < 0)
goto out_free_newdev;