ti,ina219 (on i2c bus)
Vendor: Texas Instruments
Note
An implementation of a driver matching this compatible is available in drivers/sensor/ti/ina219/ina219.c.
Description
Texas Instruments Bidirectional Current/Power Sensor
Properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Current LSB in microAmpere
Current LSB = max expected current [A] / 2^15
example: 100 -> ~3A
This property is required. |
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Value of the shunt resistor in milliOhm
This property is required. |
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Bus Voltage Range
0 = 16 V FSR
1 = 32 V FSR
The default of 32V is the power-on reset value of the device.
Should the expected bus voltage be below 16V set this to 0.
Default value: Legal values: |
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Programmable Gain
0 = 1 -> ±40 mV
1 = /2 -> ±80 mV
2 = /4 -> ±160 mV
3 = /8 -> ±320 mV
The default of ±320 mV is the power-on reset value of the device.
In case the expected voltage drop across the shunt resistor is lower
one can adjust this to get more accurate readings.
Default value: Legal values: |
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Bus ADC configuration
0 = 9 bit -> 84 µs
1 = 10 bit -> 148 µs
2 = 11 bit -> 276 µs
3 = 12 bit -> 532 µs
9 = 12 bit - 2 sample averaging -> 1.06 ms
10 = 12 bit - 4 sample averaging -> 2.13 ms
11 = 12 bit - 8 sample averaging -> 4.26 ms
12 = 12 bit - 16 sample averaging -> 8.51 ms
13 = 12 bit - 32 sample averaging -> 17.02 ms
14 = 12 bit - 64 sample averaging -> 34.05 ms
15 = 12 bit - 128 sample averaging -> 68.10 ms
The default of 12 bit is the power-on reset value of the device.
Lowering the resolution of the ADC gives less accurate readings but
cuts down on conversion times.
Averaging over multiple samples gives more stable readings but adds
to overall conversion time.
Default value: Legal values: |
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Shunt ADC configuration
0 = 9 bit -> 84 µs
1 = 10 bit -> 148 µs
2 = 11 bit -> 276 µs
3 = 12 bit -> 532 µs
9 = 12 bit - 2 sample averaging -> 1.06 ms
10 = 12 bit - 4 sample averaging -> 2.13 ms
11 = 12 bit - 8 sample averaging -> 4.26 ms
12 = 12 bit - 16 sample averaging -> 8.51 ms
13 = 12 bit - 32 sample averaging -> 17.02 ms
14 = 12 bit - 64 sample averaging -> 34.05 ms
15 = 12 bit - 128 sample averaging -> 68.10 ms
The default of 12 bit is the power-on reset value of the device.
Lowering the resolution of the ADC gives less accurate readings but
cuts down on conversion times.
Averaging over multiple samples gives more stable readings but adds
to overall conversion time.
Default value: Legal values: |
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Human readable string describing the sensor. It can be used to
distinguish multiple instances of the same model (e.g., lid accelerometer
vs. base accelerometer in a laptop) to a host operating system.
This property is defined in the Generic Sensor Property Usages of the HID
Usage Tables specification
(https://usb.org/sites/default/files/hut1_3_0.pdf, section 22.5).
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GPIO specifier that controls power to the device.
This property should be provided when the device has a dedicated
switch that controls power to the device. The supply state is
entirely the responsibility of the device driver.
Contrast with vin-supply.
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Reference to the regulator that controls power to the device.
The referenced devicetree node must have a regulator compatible.
This property should be provided when device power is supplied
by a shared regulator. The supply state is dependent on the
request status of all devices fed by the regulator.
Contrast with supply-gpios. If both properties are provided
then the regulator must be requested before the supply GPIOS is
set to an active state, and the supply GPIOS must be set to an
inactive state before releasing the regulator.
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Deprecated properties not inherited from the base binding file.
(None)
Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “ti,ina219” compatible.
Name |
Type |
Details |
|---|---|---|
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indicates the operational status of a device
Legal values: See Important properties for more information. |
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compatible strings
This property is required. See Important properties for more information. |
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register space
This property is required. See Important properties for more information. |
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name of each register space
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interrupts for device
See Important properties for more information. |
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extended interrupt specifier for device
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name of each interrupt
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phandle to interrupt controller node
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Human readable string describing the device (used as device_get_binding() argument)
See Important properties for more information. This property is deprecated. |
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Clock gate information
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name of each clock
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number of address cells in reg property
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number of size cells in reg property
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DMA channels specifiers
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Provided names of DMA channel specifiers
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IO channels specifiers
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Provided names of IO channel specifiers
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mailbox / IPM channels specifiers
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Provided names of mailbox / IPM channel specifiers
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Power domain specifiers
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Provided names of power domain specifiers
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Number of cells in power-domains property
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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
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Property to identify that a device can be used as wake up source.
When this property is provided a specific flag is set into the
device that tells the system that the device is capable of
wake up the system.
Wake up capable devices are disabled (interruptions will not wake up
the system) by default but they can be enabled at runtime if necessary.
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Automatically configure the device for runtime power management after the
init function runs.
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List of power states that will disable this device power.
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