linux-kernel - Re: [PATCH] thunderbolt: Add 'generation' attribute for devices

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Date:   Wed, 9 Oct 2019 13:10:48 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Christian Kellner <ckellner@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        Mario Limonciello <Mario.Limonciello@...l.com>,
        Christian Kellner <christian@...lner.me>,
        Andreas Noever <andreas.noever@...il.com>,
        Michael Jamet <michael.jamet@...el.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>
Subject: Re: [PATCH] thunderbolt: Add 'generation' attribute for devices

On Thu, Oct 03, 2019 at 07:32:40PM +0200, Christian Kellner wrote:
> From: Christian Kellner <christian@...lner.me>
> 
> 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@...lner.me>
> ---
>  Documentation/ABI/testing/sysfs-bus-thunderbolt |  8 ++++++++
>  drivers/thunderbolt/switch.c                    | 10 ++++++++++
>  2 files changed, 18 insertions(+)
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-thunderbolt b/Documentation/ABI/testing/sysfs-bus-thunderbolt
> index b21fba14689b..630e51344f1c 100644
> --- a/Documentation/ABI/testing/sysfs-bus-thunderbolt
> +++ b/Documentation/ABI/testing/sysfs-bus-thunderbolt
> @@ -80,6 +80,14 @@ Contact:	thunderbolt-software@...ts.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:		Aug 2019

I updated this to be Jan 2020, which is estimated release date of v5.5
according to http://phb-crystal-ball.org/, and queued it for v5.5.

Thanks!