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Message-ID: <20250711130241.159143-2-antoniu.miclaus@analog.com>
Date: Fri, 11 Jul 2025 16:02:35 +0300
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: <jic23@...nel.org>, <robh@...nel.org>, <conor+dt@...nel.org>,
        <devicetree@...r.kernel.org>, <linux-iio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC: Antoniu Miclaus <antoniu.miclaus@...log.com>
Subject: [PATCH 1/3] iio: add power and energy measurement modifiers

Add new IIO modifiers to support power and energy measurement devices:

Power modifiers:
- IIO_MOD_ACTIVE: Real power consumed by the load
- IIO_MOD_REACTIVE: Power that oscillates between source and load
- IIO_MOD_APPARENT: Magnitude of complex power
- IIO_MOD_FUND_REACTIVE: Reactive power at fundamental frequency
- IIO_MOD_FACTOR: Power factor (ratio of active to apparent power)

Energy modifiers:
- IIO_MOD_ACTIVE_ACCUM: Accumulated active energy
- IIO_MOD_APPARENT_ACCUM: Accumulated apparent energy
- IIO_MOD_REACTIVE_ACCUM: Accumulated reactive energy

Signal quality modifiers:
- IIO_MOD_RMS: Root Mean Square value
- IIO_MOD_SWELL: Voltage swell detection
- IIO_MOD_DIP: Voltage dip (sag) detection

These modifiers enable proper representation of power measurement
devices like energy meters and power analyzers.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
 Documentation/ABI/testing/sysfs-bus-iio | 19 +++++++++++++++++++
 drivers/iio/industrialio-core.c         | 11 +++++++++++
 include/uapi/linux/iio/types.h          | 11 +++++++++++
 3 files changed, 41 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 3bc386995fb6..d5c227c03589 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -143,6 +143,9 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_raw
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_supply_raw
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_i_raw
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_q_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_rms_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_swell_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY_dip_raw
 KernelVersion:	2.6.35
 Contact:	linux-iio@...r.kernel.org
 Description:
@@ -158,6 +161,7 @@ Description:
 		component of the signal while the 'q' channel contains the quadrature
 		component.
 
+
 What:		/sys/bus/iio/devices/iio:deviceX/in_voltageY-voltageZ_raw
 KernelVersion:	2.6.35
 Contact:	linux-iio@...r.kernel.org
@@ -170,6 +174,11 @@ Description:
 		of scale and offset are millivolts.
 
 What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_active_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_reactive_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_apparent_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_fund_reactive_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_powerY_factor_raw
 KernelVersion:	4.5
 Contact:	linux-iio@...r.kernel.org
 Description:
@@ -178,6 +187,7 @@ Description:
 		unique to allow association with event codes. Units after
 		application of scale and offset are milliwatts.
 
+
 What:		/sys/bus/iio/devices/iio:deviceX/in_capacitanceY_raw
 KernelVersion:	3.2
 Contact:	linux-iio@...r.kernel.org
@@ -1593,6 +1603,12 @@ Description:
 
 What:		/sys/.../iio:deviceX/in_energy_input
 What:		/sys/.../iio:deviceX/in_energy_raw
+What:		/sys/.../iio:deviceX/in_energyY_active_raw
+What:		/sys/.../iio:deviceX/in_energyY_reactive_raw
+What:		/sys/.../iio:deviceX/in_energyY_apparent_raw
+What:		/sys/.../iio:deviceX/in_energyY_active_accum_raw
+What:		/sys/.../iio:deviceX/in_energyY_reactive_accum_raw
+What:		/sys/.../iio:deviceX/in_energyY_apparent_accum_raw
 KernelVersion:	4.0
 Contact:	linux-iio@...r.kernel.org
 Description:
@@ -1600,6 +1616,7 @@ Description:
 		device (e.g.: human activity sensors report energy burnt by the
 		user). Units after application of scale are Joules.
 
+
 What:		/sys/.../iio:deviceX/in_distance_input
 What:		/sys/.../iio:deviceX/in_distance_raw
 KernelVersion:	4.0
@@ -1718,6 +1735,7 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_raw
 What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_supply_raw
 What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_i_raw
 What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_q_raw
+What:		/sys/bus/iio/devices/iio:deviceX/in_currentY_rms_raw
 KernelVersion:	3.17
 Contact:	linux-iio@...r.kernel.org
 Description:
@@ -1733,6 +1751,7 @@ Description:
 		component of the signal while the 'q' channel contains the quadrature
 		component.
 
+
 What:		/sys/.../iio:deviceX/in_energy_en
 What:		/sys/.../iio:deviceX/in_distance_en
 What:		/sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index f13c3aa470d7..daf486cbe0bd 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -152,6 +152,17 @@ static const char * const iio_modifier_names[] = {
 	[IIO_MOD_PITCH] = "pitch",
 	[IIO_MOD_YAW] = "yaw",
 	[IIO_MOD_ROLL] = "roll",
+	[IIO_MOD_RMS] = "rms",
+	[IIO_MOD_ACTIVE] = "active",
+	[IIO_MOD_REACTIVE] = "reactive",
+	[IIO_MOD_APPARENT] = "apparent",
+	[IIO_MOD_FUND_REACTIVE] = "fund_reactive",
+	[IIO_MOD_FACTOR] = "factor",
+	[IIO_MOD_ACTIVE_ACCUM] = "active_accum",
+	[IIO_MOD_APPARENT_ACCUM] = "apparent_accum",
+	[IIO_MOD_REACTIVE_ACCUM] = "reactive_accum",
+	[IIO_MOD_SWELL] = "swell",
+	[IIO_MOD_DIP] = "dip",
 };
 
 /* 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 3eb0821af7a4..9e05bbddcbe2 100644
--- a/include/uapi/linux/iio/types.h
+++ b/include/uapi/linux/iio/types.h
@@ -108,6 +108,17 @@ enum iio_modifier {
 	IIO_MOD_ROLL,
 	IIO_MOD_LIGHT_UVA,
 	IIO_MOD_LIGHT_UVB,
+	IIO_MOD_RMS,
+	IIO_MOD_ACTIVE,
+	IIO_MOD_REACTIVE,
+	IIO_MOD_APPARENT,
+	IIO_MOD_FUND_REACTIVE,
+	IIO_MOD_FACTOR,
+	IIO_MOD_ACTIVE_ACCUM,
+	IIO_MOD_APPARENT_ACCUM,
+	IIO_MOD_REACTIVE_ACCUM,
+	IIO_MOD_SWELL,
+	IIO_MOD_DIP,
 };
 
 enum iio_event_type {
-- 
2.49.0

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