linux-kernel - Re: [PATCH 0/3] iio: temperature: Add support for P3T1085

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Message-ID: <e566ee56-523c-4cfd-999d-1cd9ca8eb7a6@roeck-us.net>
Date: Fri, 8 Nov 2024 07:49:54 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 Frank Li <Frank.Li@....com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Jonathan Cameron <jic23@...nel.org>,
 Lars-Peter Clausen <lars@...afoo.de>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 Carlos Song <carlos.song@....com>, Clark Wang <xiaoning.wang@....com>,
 Jean Delvare <jdelvare@...e.com>, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH 0/3] iio: temperature: Add support for P3T1085

On 11/8/24 07:28, Jonathan Cameron wrote:
> On Thu, 07 Nov 2024 18:02:26 -0500
> Frank Li <Frank.Li@....com> wrote:
> 
>> Add basic function support for P3T1085 temperature sensor.
>> - Add binding doc trivial.yaml
>> - Add basic read temperature driver
> Hi Frank,
> 
> For a simple temperature sensor the usual question is why IIO rather
> than hwmon?
> 

 From looking into the datasheet, this is a chip which will be typically
used for hardware monitoring.

> Previous reasons have been:
> - Very high performmance / accuracy part (i.e. expensive)

0.25 Hz ... 16 Hz sampling rate. No.

> - Remote temperature so not typically hw monitoring.

Local only.

> - Same silicon with a more complex sensor (typically humidity or similar).
> 
No.

It looks like the I2C part of the chip is is compatible to TMP108, so
another question would be why to implement a new driver in the first place.

Guenter