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SubjectRe: [PATCH v2 1/2] iio: adc: sc27xx: Add raw data support
Hi Jonathan,

On 2 September 2018 at 16:51, Jonathan Cameron <> wrote:
> On Wed, 29 Aug 2018 14:04:04 +0800
> Baolin Wang <> wrote:
>> The headset device will use channel 20 of ADC controller to detect events,
>> but it needs the raw ADC data to do conversion according to its own formula.
>> Thus we should configure the channel mask separately and configure channel
>> 20 as IIO_CHAN_INFO_RAW, as well as adding raw data read support.
>> Signed-off-by: Baolin Wang <>
> I'm still a little unclear on whether there is fundamentally something different
> about this channel or whether this is just a policy decision for particular
> (possibly all) board. For now we'll go with this change, but if anyone screams
> we will have to then go the nasty route of supporting both processed and raw
> for channel 20.

Until now, channel 20 is always used for the headset on the SC27xx
series PMICs. Yes, this is a policy decision, but for all the SC27xx
series PMICs.

> Applied to the togreg branch of iio.git and pushed out as testing for the
> autobuilders to play with it.


Baolin Wang
Best Regards

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