On Thu, Dec 10, 2015 at 2:40 AM, Peter Meerwald-Stadler
<pmeerw@xxxxxxxxxx> wrote:
>
>> Signed-off-by: Matt Ranostay <mranostay@xxxxxxxxx>
>> ---
>> Documentation/ABI/testing/sysfs-bus-iio | 6 ++++++
>> drivers/iio/industrialio-core.c | 1 +
>> include/uapi/linux/iio/types.h | 1 +
>> 3 files changed, 8 insertions(+)
>>
>> diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
>> index 0439c2a..b15314e 100644
>> --- a/Documentation/ABI/testing/sysfs-bus-iio
>> +++ b/Documentation/ABI/testing/sysfs-bus-iio
>> @@ -1491,3 +1491,9 @@ Description:
>> This ABI is especially applicable for humidity sensors
>> to heatup the device and get rid of any condensation
>> in some humidity environment
>> +
>> +What: /sys/bus/iio/devices/iio:deviceX/in_ph_raw
>> +KernelVersion: 4.5
>> +Contact: linux-iio@xxxxxxxxxxxxxxx
>> +Description:
>> + Raw (unscaled no offset etc.) pH reading of a substance.
>
> what is the unit (after application of offset and scale?
> or otherwise state that this is unit-less
It will be floating point 0.0 to 14.0 with the pH level. Which is the
log scale of hydronium (per litre) in a solution.
>
>> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
>> index d42a8ff9..e1b9a9e 100644
>> --- a/drivers/iio/industrialio-core.c
>> +++ b/drivers/iio/industrialio-core.c
>> @@ -77,6 +77,7 @@ static const char * const iio_chan_type_name_spec[] = {
>> [IIO_VELOCITY] = "velocity",
>> [IIO_CONCENTRATION] = "concentration",
>> [IIO_RESISTANCE] = "resistance",
>> + [IIO_PH] = "ph",
>> };
>>
>> static const char * const iio_modifier_names[] = {
>> diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
>> index 7c63bd6..c077617 100644
>> --- a/include/uapi/linux/iio/types.h
>> +++ b/include/uapi/linux/iio/types.h
>> @@ -37,6 +37,7 @@ enum iio_chan_type {
>> IIO_VELOCITY,
>> IIO_CONCENTRATION,
>> IIO_RESISTANCE,
>> + IIO_PH,
>> };
>>
>> enum iio_modifier {
>>
>
> --
>
> Peter Meerwald-Stadler
> +43-664-2444418 (mobile)
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