Re: twl6030-gpadc support for twl6037

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Am 22.07.2015 um 21:41 schrieb Graeme Gregory <gg@xxxxxxxxxxxxxxx>:

> 
> 
> On Wed, 22 Jul 2015, at 08:33 PM, Graeme Gregory wrote:
>> 
>> 
>> On Wed, 22 Jul 2015, at 08:28 PM, Belisko Marek wrote:
>>> Adding also twl6030-gpadc driver authors to loop
>>> 
>>> On Mon, Jul 20, 2015 at 8:57 AM, Belisko Marek <marek.belisko@xxxxxxxxx>
>>> wrote:
>>>> Hi all,
>>>> 
>>>> I'm trying to figure out what is relation between palmas mfd driver
>>>> and twl-core for twl603x devices.
>>>> twl-core driver seems to be older than palmas driver but seems both
>>>> export same functionality (except that palmas have defined structs for
>>>> gpadc but functionality is missing). My main focus is to add support
>>>> for twl6037 to gpadc iio driver in iio/adc/twl6030-gpadc which is
>>>> using twl-core for twl6030 and twl6032. Adding twl6037 support should
>>>> be straightforward but dts file used in omap5-uevm using palmas driver
>>>> and not twl6030. So it's completely confusing to me how to proceed or
>>>> which direction is correct. Seems I'm missing some parts of puzzle ;)
>>>> Thanks for any hints.
>>>> 
>> Phoenix is twl6030, twl6032
>> 
>> Palmas is twl6035, twl6037 and maybe others.
>> 
>> Phoenix and Palmas are two totally different chips but marketing gave
>> them numbers near each other for unknown reasons.
>> 
> Also this might be useful.
> 
> https://github.com/slimlogic/linux/commit/312a6a1c8013fd056431c31567b43d8eef40f333

That is basically what we are looking for.

We will give it a try asap and let you know results.

> 
> A pre IIO palmas ADC driver which I never got around to upstreaming

Well, unless it already exists somewhere, it should be converterd to iio by updating the
driver structure to follow iio/adc/twl6030-gpadc.

> because TIpocalypse left me with no access to a palmas chip.

The OMAP5432EVM by SVtronics [1] comes with a twl6037 (and it is
supported by mainline device tree omap5-uevm.dts). And we hope
that the pyra-handheld.com hardware is finished soon. For hardware
bring-up it would be good to already have the gpadc available - so
we have some hen-and-egg situation here.

BR and thanks,
Nikolaus

[1]: http://www.svtronics.com/5432

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