linux-kernel - Re: [PATCH 00/16] iio: adc: at91-sama5d2_adc: add support for temperature sensor

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Message-ID: <e6f98248-97df-03d1-d41a-ba5466cc069f@microchip.com>
Date:   Tue, 14 Jun 2022 10:41:33 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <jic23@...nel.org>
CC:     <Eugen.Hristev@...rochip.com>, <lars@...afoo.de>,
        <Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <robh+dt@...nel.org>, <krzk+dt@...nel.org>,
        <ludovic.desroches@...el.com>, <linux-iio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/16] iio: adc: at91-sama5d2_adc: add support for
 temperature sensor

On 11.06.2022 21:16, Jonathan Cameron wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On Thu, 9 Jun 2022 11:31:57 +0300
> Claudiu Beznea <claudiu.beznea@...rochip.com> wrote:
> 
>> Hi,
>>
>> The following series add support for temperature sensor available on
>> SAMA7G5.
>>
>> Temperature sensor available on SAMA7G5 provides 2 outputs VTEMP and VBG.
>> VTEMP is proportional to the absolute temperature voltage and VBG is a
>> quasi-temperature independent voltage. Both are necessary in computing
>> the temperature (for better accuracy). Also, for better accuracy the
>> following settings were imposed when measusing the temperature:
>> oversampling rate of 256, sampling frequency of 10MHz, a startup time of
>> 512 ticks, MR.tracktim=0xf, EMR.trackx=0x3.
>>
>> For computing the temperature measured by ADC calibration data is
>> necessary. This is provided via OTP memory available on SAMA7G5.
>>
>> Patches 1/16-3/16 provides some fixes.
>> Patches 3/16-12/16 prepares for the addition of temperature sensor
>> support.
>> Patch 13/16 adds the temperature sensor support.
>>
>> Along with temperature sensor support I took the chance and added
>> runtime PM support in this series, too (handled in patch 15/16).
>>
>> The rest of patches in this series are minor cleanups.
>>
>> Thank you,
>> Claudiu Beznea
> 
> Hi CLaudiu,
> 
> Those patches I haven't replied to individually look good to me.

Hi, Jonathan,

Thank you for your review!

> > Thanks,
> 
> Jonathan
> 
>>
>> Claudiu Beznea (16):
>>   iio: adc: at91-sama5d2_adc: fix AT91_SAMA5D2_MR_TRACKTIM_MAX
>>   iio: adc: at91-sama5d2_adc: lock around oversampling and sample freq
>>   iio: adc: at91-sama5d2_adc: exit from write_raw() when buffers are
>>     enabled
>>   iio: adc: at91-sama5d2_adc: handle different EMR.OSR for different hw
>>     versions
>>   iio: adc: at91-sama5d2_adc: adjust osr based on specific platform data
>>   iio: adc: at91-sama5d2_adc: add 64 and 256 oversampling ratio
>>   iio: adc: at91-sama5d2_adc: simplify the code in
>>     at91_adc_read_info_raw()
>>   iio: adc: at91-sama5d2_adc: move oversampling storage in its function
>>   iio: adc: at91-sama5d2_adc: update trackx on emr
>>   iio: adc: at91-sama5d2_adc: add startup and tracktim as parameter for
>>     at91_adc_setup_samp_freq()
>>   iio: adc: at91-sama5d2_adc: add locking parameter to
>>     at91_adc_read_info_raw()
>>   dt-bindings: iio: adc: at91-sama5d2_adc: add id for temperature
>>     channel
>>   iio: adc: at91-sama5d2_adc: add support for temperature sensor
>>   iio: adc: at91-sama5d2_adc: add empty line after functions
>>   iio: adc: at91-sama5d2_adc: add runtime pm support
>>   iio: adc: at91-sama5d2_adc: use pm_ptr()
>>
>>  drivers/iio/adc/at91-sama5d2_adc.c            | 633 +++++++++++++++---
>>  .../dt-bindings/iio/adc/at91-sama5d2_adc.h    |   3 +
>>  2 files changed, 548 insertions(+), 88 deletions(-)
>>
>