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@xxxxxxxxx>
---
drivers/net/usb/qmi_wwan.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index 7ea113f51074..9b85e2ed4760 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -218,6 +218,31 @@ static int qmimux_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
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;
+ ssize_t count = 0;
+
+ priv = netdev_priv(dev);
+ count += scnprintf(&buf[count], PAGE_SIZE - count,
+ "0x%02x\n", priv->mux_id);
+
+ return count;
+}
+
+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 +265,8 @@ 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;
--
2.17.1
