diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-thunderbolt | 8 | ||||
| -rw-r--r-- | drivers/thunderbolt/switch.c | 10 |
2 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-thunderbolt b/Documentation/ABI/testing/sysfs-bus-thunderbolt index b21fba14689b..c31b4616181c 100644 --- a/Documentation/ABI/testing/sysfs-bus-thunderbolt +++ b/Documentation/ABI/testing/sysfs-bus-thunderbolt @@ -80,6 +80,14 @@ Contact: thunderbolt-software@lists.01.org Description: This attribute contains 1 if Thunderbolt device was already authorized on boot and 0 otherwise. +What: /sys/bus/thunderbolt/devices/.../generation +Date: Jan 2020 +KernelVersion: 5.5 +Contact: Christian Kellner <christian@kellner.me> +Description: This attribute contains the generation of the Thunderbolt + controller associated with the device. It will contain 4 + for USB4. + What: /sys/bus/thunderbolt/devices/.../key Date: Sep 2017 KernelVersion: 4.13 diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 410bf1bceeee..ac9fa2740800 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1120,6 +1120,15 @@ device_name_show(struct device *dev, struct device_attribute *attr, char *buf) } static DEVICE_ATTR_RO(device_name); +static ssize_t +generation_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct tb_switch *sw = tb_to_switch(dev); + + return sprintf(buf, "%u\n", sw->generation); +} +static DEVICE_ATTR_RO(generation); + static ssize_t key_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1325,6 +1334,7 @@ static struct attribute *switch_attrs[] = { &dev_attr_boot.attr, &dev_attr_device.attr, &dev_attr_device_name.attr, + &dev_attr_generation.attr, &dev_attr_key.attr, &dev_attr_nvm_authenticate.attr, &dev_attr_nvm_version.attr, |