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

[Claudiu.Beznea at microchip.com]

On 01.08.2022 12:46, Claudiu Beznea - M18063 wrote:
> 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 at kernel.org> wrote:
>>
>>> On Tue, 28 Jun 2022 18:16:12 +0300
>>> Claudiu Beznea <claudiu.beznea at microchip.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.

Hi, Jonathan,

I've posted a new version fixing the compilation warning: patches 10/19 and
11/19 were adapted.

Thank you,
Claudiu Beznea

> 
> 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(-)
>>>>
>>>
>>
>