Re: [PATCH wireless-next] wifi: cfg80211: add fw_version device attribute for sysfs

[Rory Little <roryl@candelatech.com>]

On 7/28/26 10:32 PM, Rory Little wrote:
> On 7/28/26 18:34, Jeff Johnson wrote:
>> On 7/28/2026 4:47 PM, Rory Little wrote:
>>> The firmware version is already exposed via ethtool, but is not
>>> accessible without an attached interface to create a netdev. Expose this
>>> info in sysfs to allow users to query it without the use of ethtool.
>> Curious what is the value?
> 
> Here are some that I have seen:
> 
> 10.4-ct-9984-xtH-011-33ec52c8
> ____000000-20251118163234
> ____000000-20251015213023
> DEV_000000-20240823172837
> DEV_000000-20220929104205
> 89.7207fc64.0 ty-a0-gf-a0-89.uc
> 
> Top one is ath10k with CT firmware, next four are an assortment of 
> Mediatek radios, bottom is Intel.

I just realized that I misinterpreted what you were asking about here. 
Sorry about that.

The value of an interface to query fw_version for us is to keep track of 
system info and generate valuable bug reports (we do our own firmware 
packaging, and certain issues that we encounter can be solved by 
changing firmware version). This particular commit was motivated by the 
desire to be able to query it in any system configuration, as we were 
hitting a case where it needed to be queried while no interfaces were 
attached to the phy (thereby preventing ethtool use).

- Rory