linux-kernel - Re: [PATCH v2 00/19] iio: adc: at91-sama5d2_adc: add support for temperature sensor

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Message-ID: <33008bfc-81f8-6943-0e72-70a1e91a10bf@microchip.com>
Date:   Mon, 1 Aug 2022 09:46:57 +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>,
        <linux-iio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 00/19] iio: adc: at91-sama5d2_adc: add support for
 temperature sensor

On 31.07.2022 23:13, Jonathan Cameron wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On Sat, 16 Jul 2022 17:42:49 +0100
> Jonathan Cameron <jic23@...nel.org> wrote:
> 
>> On Tue, 28 Jun 2022 18:16:12 +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 1/19-4/19 provides some fixes.
>>> Patches 5/19-16/19 prepares for the addition of temperature sensor
>>> support.
>>> Patch 17/16 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 19/19).
>>>
>>> The rest of patches in this series are minor cleanups.
>>
>> Other than the use of MEGA in patch 17, I'm fine with this now, but
>> would like to leave more time for Eugen and others to comment if they
>> wish.  Given timing, I'm afraid this is very unlikely to make the next
>> merge window anyway now, so we have lots of time.
> 
> Long enough.  I'll queue this up though for now it'll only be exposed as testing
> as I'll be rebasing the togreg tree on rc1 once available.

I saw that kbuild robot found something (reported at [1]). Is it OK to just
send a patch fixing the issue or would you like me to integrate the changes
in patch [21/30] iio: adc: at91-sama5d2_adc: adjust osr based on specific
platform data and resend the whole series.

Thank you,
Claudiu Beznea

[1] https://lore.kernel.org/all/202208010745.QZRYCihu-lkp@intel.com/

> 
> Thanks,
> 
> Jonathan
> 
>>
>> Sorry for the delay in my reviewing v2. Pesky covid.
>>
>> Jonathan
>>
>>>
>>> Thank you,
>>> Claudiu Beznea
>>>
>>> Changes in v2:
>>> - addressed review comments
>>> - with this, new patches were intruced in this series: 2/19, 4/19,
>>>   8/19, 9,19
>>> - runtime pm support has been adapted to work also when CONFIG_PM
>>>   is not enabled
>>> - collected tags
>>>
>>> Claudiu Beznea (19):
>>>   iio: adc: at91-sama5d2_adc: fix AT91_SAMA5D2_MR_TRACKTIM_MAX
>>>   iio: adc: at91-sama5d2_adc: check return status for pressure and touch
>>>   iio: adc: at91-sama5d2_adc: lock around oversampling and sample freq
>>>   iio: adc: at91-sama5d2_adc: disable/prepare buffer on suspend/resume
>>>   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: move the check of oversampling in its
>>>     function
>>>   iio: adc: at91-sama5d2_adc: drop AT91_OSR_XSAMPLES defines
>>>   iio: adc: at91-sama5d2_adc: add .read_avail() chan_info ops
>>>   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: 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: lock around 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
>>>
>>>  drivers/iio/adc/at91-sama5d2_adc.c            | 683 +++++++++++++++---
>>>  .../dt-bindings/iio/adc/at91-sama5d2_adc.h    |   3 +
>>>  2 files changed, 566 insertions(+), 120 deletions(-)
>>>
>>
>