linux-kernel - Re: [PATCH v2] hwmon: Driver for temperature sensors on SATA drives

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Message-ID: <d42990af-78e4-e6c4-37ae-8043d27e565a@roeck-us.net>
Date:   Tue, 7 Jan 2020 05:00:39 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     linux-hwmon@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bart Van Assche <bvanassche@....org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org, linux-ide@...r.kernel.org,
        Chris Healy <cphealy@...il.com>
Subject: Re: [PATCH v2] hwmon: Driver for temperature sensors on SATA drives

On 1/6/20 8:10 PM, Martin K. Petersen wrote:
> 
> Hi Guenter!
> 
>>>   - I still think sensor naming needs work. How and where are the
>>>     "drivetemp-scsi-8-140" names generated?
>>>
>> Quick one: In libsensors, outside the kernel. The naming is generic,
>> along the line of <driver name>-<bus name>-<bus index>-<slot>.
> 
> I understand that there are sensors that may not have an obvious
> associated topology and therefore necessitate coming up with a suitable
> naming or enumeration scheme. But in this case we already have a
> well-defined SCSI device name. Any particular reason you don't shift the
> chip.addr back and print the H:C:T:L format that you used as input?
> 
> However arcane H:C:T:L may seem, I think that predictable naming would
> make things a lot easier for users that need to identify which device
> matches which sensor...
> 

Not sure I understand. Do you mean to add "H:C:T:L" to "drivetemp" ?
That would make it something like "drivetemp:H:C:T:L-scsi-8-140".
Not sure if that is really useful, and it would at least be partially
redundant.

"scsi-8-140" is created by libsensors, so any change in that would
have to be made there, not in the kernel driver.

Guenter