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Message-ID: <20250721112455.23948-1-antoniu.miclaus@analog.com>
Date: Mon, 21 Jul 2025 14:24:41 +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 v2 1/5] 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)
Signal quality modifiers:
- IIO_MOD_RMS: Root Mean Square value
These modifiers enable proper representation of power measurement
devices like energy meters and power analyzers.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
changes in v2:
- drop _accum modifiers
- drop dip/swell modifiers
- change power factor to be a chan_info
- voltage -> altvoltage for rms
Documentation/ABI/testing/sysfs-bus-iio | 14 ++++++++++++++
drivers/iio/industrialio-core.c | 5 +++++
include/linux/iio/types.h | 1 +
include/uapi/linux/iio/types.h | 4 ++++
4 files changed, 24 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 3bc386995fb6..0948611227a8 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -169,7 +169,12 @@ Description:
is required is a consistent labeling. Units after application
of scale and offset are millivolts.
+What: /sys/bus/iio/devices/iio:deviceX/in_altvoltageY_rms_raw
+
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
KernelVersion: 4.5
Contact: linux-iio@...r.kernel.org
Description:
@@ -178,6 +183,8 @@ 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_powerY_power_factor
+
What: /sys/bus/iio/devices/iio:deviceX/in_capacitanceY_raw
KernelVersion: 3.2
Contact: linux-iio@...r.kernel.org
@@ -1593,6 +1600,12 @@ 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:
@@ -1718,6 +1731,7 @@ 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:
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index f13c3aa470d7..7889f8b62336 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -152,6 +152,10 @@ 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",
};
/* relies on pairs of these shared then separate */
@@ -189,6 +193,7 @@ static const char * const iio_chan_info_postfix[] = {
[IIO_CHAN_INFO_ZEROPOINT] = "zeropoint",
[IIO_CHAN_INFO_TROUGH] = "trough_raw",
[IIO_CHAN_INFO_CONVDELAY] = "convdelay",
+ [IIO_CHAN_INFO_POWER_FACTOR] = "power_factor",
};
/**
* iio_device_id() - query the unique ID for the device
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index ad2761efcc83..f26a0fbd6ab4 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -70,6 +70,7 @@ enum iio_chan_info_enum {
IIO_CHAN_INFO_ZEROPOINT,
IIO_CHAN_INFO_TROUGH,
IIO_CHAN_INFO_CONVDELAY,
+ IIO_CHAN_INFO_POWER_FACTOR,
};
#endif /* _IIO_TYPES_H_ */
diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
index 3eb0821af7a4..0afda9ec2379 100644
--- a/include/uapi/linux/iio/types.h
+++ b/include/uapi/linux/iio/types.h
@@ -108,6 +108,10 @@ 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,
};
enum iio_event_type {
--
2.49.0
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