On Wed, Dec 12, 2018 at 10:31 AM Tomasz Duszynski <tduszyns@xxxxxxxxx> wrote:
>
> Measuring particulate matter in ug / m3 (micro-grams per cubic meter)
> is de facto standard. Existing air quality sensors usually follow
> this convention and are capable of returning measurements using
> this unit.
>
> IIO currently does not offer suitable channel type for this
> type of measurements hence this patch adds this.
>
> In addition, extra modifiers are introduced used for distinguishing
> between fine pm1, pm2p5 and coarse pm4, pm10 particle measurements, i.e
> IIO_MOD_PM1, IIO_MOD_PM25 and IIO_MOD_PM4, IIO_MOD_PM10.
>
> pmX consists of particles with aerodynamic diameter less or equal to
> X micrometers.
>
Acked-by: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
> Signed-off-by: Tomasz Duszynski <tduszyns@xxxxxxxxx>
> ---
> Documentation/ABI/testing/sysfs-bus-iio | 17 ++++++++++++++++-
> drivers/iio/industrialio-core.c | 5 +++++
> include/uapi/linux/iio/types.h | 5 +++++
> tools/iio/iio_event_monitor.c | 10 ++++++++++
> 4 files changed, 36 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
> index 8127a08e366d..ad9579a9385f 100644
> --- a/Documentation/ABI/testing/sysfs-bus-iio
> +++ b/Documentation/ABI/testing/sysfs-bus-iio
> @@ -1684,4 +1684,19 @@ KernelVersion: 4.18
> Contact: linux-iio@xxxxxxxxxxxxxxx
> Description:
> Raw (unscaled) phase difference reading from channel Y
> - that can be processed to radians.
> \ No newline at end of file
> + that can be processed to radians.
> +
> +What: /sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm1_input
> +What: /sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm1_input
> +What: /sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm2p5_input
> +What: /sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm2p5_input
> +What: /sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm4_input
> +What: /sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm4_input
> +What: /sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm10_input
> +What: /sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm10_input
> +KernelVersion: 4.21
> +Contact: linux-iio@xxxxxxxxxxxxxxx
> +Description:
> + Mass concentration reading of particulate matter in ug / m3.
> + pmX consists of particles with aerodynamic diameter less or
> + equal to X micrometers.
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 4f5cd9f60870..4700fd5d8c90 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -87,6 +87,7 @@ static const char * const iio_chan_type_name_spec[] = {
> [IIO_GRAVITY] = "gravity",
> [IIO_POSITIONRELATIVE] = "positionrelative",
> [IIO_PHASE] = "phase",
> + [IIO_MASSCONCENTRATION] = "massconcentration",
> };
>
> static const char * const iio_modifier_names[] = {
> @@ -127,6 +128,10 @@ static const char * const iio_modifier_names[] = {
> [IIO_MOD_Q] = "q",
> [IIO_MOD_CO2] = "co2",
> [IIO_MOD_VOC] = "voc",
> + [IIO_MOD_PM1] = "pm1",
> + [IIO_MOD_PM2P5] = "pm2p5",
> + [IIO_MOD_PM4] = "pm4",
> + [IIO_MOD_PM10] = "pm10",
> };
>
> /* relies on pairs of these shared then separate */
> diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
> index 92baabc103ac..c59adac24b1c 100644
> --- a/include/uapi/linux/iio/types.h
> +++ b/include/uapi/linux/iio/types.h
> @@ -46,6 +46,7 @@ enum iio_chan_type {
> IIO_GRAVITY,
> IIO_POSITIONRELATIVE,
> IIO_PHASE,
> + IIO_MASSCONCENTRATION,
> };
>
> enum iio_modifier {
> @@ -87,6 +88,10 @@ enum iio_modifier {
> IIO_MOD_VOC,
> IIO_MOD_LIGHT_UV,
> IIO_MOD_LIGHT_DUV,
> + IIO_MOD_PM1,
> + IIO_MOD_PM2P5,
> + IIO_MOD_PM4,
> + IIO_MOD_PM10,
> };
>
> enum iio_event_type {
> diff --git a/tools/iio/iio_event_monitor.c b/tools/iio/iio_event_monitor.c
> index ac2de6b7e89f..f6b8003fbe3c 100644
> --- a/tools/iio/iio_event_monitor.c
> +++ b/tools/iio/iio_event_monitor.c
> @@ -60,6 +60,7 @@ static const char * const iio_chan_type_name_spec[] = {
> [IIO_GRAVITY] = "gravity",
> [IIO_POSITIONRELATIVE] = "positionrelative",
> [IIO_PHASE] = "phase",
> + [IIO_MASSCONCENTRATION] = "massconcentration",
> };
>
> static const char * const iio_ev_type_text[] = {
> @@ -115,6 +116,10 @@ static const char * const iio_modifier_names[] = {
> [IIO_MOD_Q] = "q",
> [IIO_MOD_CO2] = "co2",
> [IIO_MOD_VOC] = "voc",
> + [IIO_MOD_PM1] = "pm1",
> + [IIO_MOD_PM2P5] = "pm2p5",
> + [IIO_MOD_PM4] = "pm4",
> + [IIO_MOD_PM10] = "pm10",
> };
>
> static bool event_is_known(struct iio_event_data *event)
> @@ -156,6 +161,7 @@ static bool event_is_known(struct iio_event_data *event)
> case IIO_GRAVITY:
> case IIO_POSITIONRELATIVE:
> case IIO_PHASE:
> + case IIO_MASSCONCENTRATION:
> break;
> default:
> return false;
> @@ -200,6 +206,10 @@ static bool event_is_known(struct iio_event_data *event)
> case IIO_MOD_Q:
> case IIO_MOD_CO2:
> case IIO_MOD_VOC:
> + case IIO_MOD_PM1:
> + case IIO_MOD_PM2P5:
> + case IIO_MOD_PM4:
> + case IIO_MOD_PM10:
> break;
> default:
> return false;
> --
> 2.19.2
>
