linux-kernel - RE: [PATCH 0/5] scsi: ufs: ufs device as a temperature sensor

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Message-ID: <MN2PR04MB6991848EBC8DED439FCD7C49FC1D0@MN2PR04MB6991.namprd04.prod.outlook.com>
Date:   Thu, 6 Feb 2020 12:08:56 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Julian Calaby <julian.calaby@...il.com>,
        Avi Shchislowski <Avi.Shchislowski@....com>
CC:     Guenter Roeck <linux@...ck-us.net>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>
Subject: RE: [PATCH 0/5] scsi: ufs: ufs device as a temperature sensor

 
> 
> Hi Avi,
> 
> On Thu, Feb 6, 2020 at 9:48 PM Avi Shchislowski
> <Avi.Shchislowski@....com> wrote:
> >
> > As it become evident that the hwmon is not a viable option to implement
> ufs thermal notification, I would appreciate some concrete comments of this
> series.
> 
> That isn't my reading of this thread.
> 
> You have two options:
> 1. extend drivetemp if that makes sense for this particular application.
> 2. follow the model of other devices that happen to have a built-in
> temperature sensor and expose the hwmon compatible attributes as a
> subdevice
> 
> It appears that option 1 isn't viable, so what about option 2?
This will require to export the ufs device management commands,
Which is privet to the ufs driver.

This is not a viable option as well, because it will allow unrestricted access
(Including format etc.) to the storage device.

Sorry for not making it clearer before.

Thanks,
Avri

> 
> Thanks,
> 
> --
> Julian Calaby
> 
> Email: julian.calaby@...il.com
> Profile: http://www.google.com/profiles/julian.calaby/