linux-kernel - Re: [PATCH v3 3/3] hwmon: Add Baikal-T1 PVT sensor driver

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Date:   Wed, 27 May 2020 09:58:00 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Serge Semin <fancer.lancer@...il.com>,
        Jean Delvare <jdelvare@...e.com>,
        Jonathan Corbet <corbet@....net>,
        Maxim Kaurkin <maxim.kaurkin@...kalelectronics.ru>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Arnd Bergmann <arnd@...db.de>,
        Rob Herring <robh+dt@...nel.org>, linux-mips@...r.kernel.org,
        devicetree@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] hwmon: Add Baikal-T1 PVT sensor driver

On 5/27/20 9:52 AM, Serge Semin wrote:
> On Wed, May 27, 2020 at 09:25:49AM -0700, Guenter Roeck wrote:
>> On Tue, May 26, 2020 at 04:38:23PM +0300, Serge Semin wrote:
> 
> [nip]
> 
>>> +
>>> +=============================== ======= =======================================
>>> +Name				Perm	Description
>>> +=============================== ======= =======================================
>>> +update_interval			RW	Measurements update interval per
>>> +					sensor.
>>> +temp1_type			RO	Sensor type (always 1 as CPU embedded
>>> +					diode).
>>> +temp1_label			RO	CPU Core Temperature sensor.
>>> +temp1_input			RO	Measured temperature in millidegree
>>> +					Celsius.
>>> +temp1_min			RW	Low limit for temp input.
>>> +temp1_max			RW	High limit for temp input.
>>> +temp1_min_alarm			RO	Temperature input alarm. Returns 1 if
>>> +					temperature input went below min limit,
>>> +					0 otherwise.
>>> +temp1_max_alarm			RO	Temperature input alarm. Returns 1 if
>>> +					temperature input went above max limit,
>>> +					0 otherwise.
>>> +temp1_trim			RW	Temperature sensor trimming factor in
>>> +					millidegree Celsius. It can be used to
>>> +					manually adjust the temperature
>>> +					measurements within 7.130 degrees
>>> +					Celsius.
>>
>> vs. standard ABI:
>>
>> temp[1-*]_offset`
>>                 Temperature offset which is added to the temperature reading
>>                 by the chip.
>>
>>                 Unit: millidegree Celsius
>>
>> If you really think this is necessary, why not use the standard ABI ?
> 
> That would have made much more sense.) I'll replace the handwritten temp1_trim
> with the standard temp1_offset attribute in v4 shortly today. Thanks for pointing
> this out.
> 

Sorry for not realizing this earlier. The added explanation
made all the difference.

Guenter