diff options
| author | Christian Kellner <christian@kellner.me> | 2019-10-03 19:32:40 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2019-10-09 12:03:25 +0200 |
| commit | b406357c572b29cdcf05f717c69ae0018fa6a146 (patch) | |
| tree | 5abb9937af6e8cc2cbcac23840cc3a555e7aebfe /drivers/thunderbolt/switch.c | |
| parent | Linux 5.4-rc2 (diff) | |
| download | linux-b406357c572b29cdcf05f717c69ae0018fa6a146.tar.xz linux-b406357c572b29cdcf05f717c69ae0018fa6a146.zip | |
thunderbolt: Add 'generation' attribute for devices
The Thunderbolt standard went through several major iterations, here
called generation. USB4, which will be based on Thunderbolt, will be
generation 4. Let userspace know the generation of the controller in
the devices in order to distinguish between Thunderbolt and USB4, so
it can be shown in various user interfaces.
Signed-off-by: Christian Kellner <christian@kellner.me>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'drivers/thunderbolt/switch.c')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 10 |
1 files changed, 10 insertions, 0 deletions
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, |