atmel,sam-adc
Vendor: Atmel Corporation
Note
An implementation of a driver matching this compatible is available in drivers/adc/adc_sam.c.
Description
Atmel SAM family ADC
Properties
Top level properties
These property descriptions apply to “atmel,sam-adc” nodes themselves. This page also describes child node properties in the following sections.
Properties not inherited from the base binding file.
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Type |
Details |
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This property is required. Constant value: |
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Pin configuration/s for the first state. Content is specific to the
selected pin controller driver implementation.
This property is required. |
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Pin configuration/s for the second state. See pinctrl-0.
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Pin configuration/s for the third state. See pinctrl-0.
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Pin configuration/s for the fourth state. See pinctrl-0.
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Pin configuration/s for the fifth state. See pinctrl-0.
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Names for the provided states. The number of names needs to match the
number of states.
This property is required. |
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CPU clock prescaler applied to get the ADC clock.
This property is required. |
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ADC startup time in ADC clock cycles.
This property is required. Legal values: |
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ADC settling time in ADC clock cycles. When the gain, offset
or differential input parameters of the analog cell change
between two channels, the analog cell may need a specific
settling time before starting the tracking phase.
This property is required. Legal values: |
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ADC tracking time in ADC clock cycles. A minimal tracking time
is necessary for the ADC to guarantee the best converted final
value between two channel selections.
This property is required. Legal values: |
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 “atmel,sam-adc” compatible.
Name |
Type |
Details |
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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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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
This property is required. 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
This property is required. |
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name of each clock
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number of address cells in reg property
Constant value: |
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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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Child node properties
Name |
Type |
Details |
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Channel identifier.
This property is required. See Important properties for more information. |
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Gain selection:
- ADC_GAIN_1_6: x 1/6
- ADC_GAIN_1_5: x 1/5
- ADC_GAIN_1_4: x 1/4
- ADC_GAIN_1_3: x 1/3
- ADC_GAIN_2_5: x 2/5
- ADC_GAIN_1_2: x 1/2
- ADC_GAIN_2_3: x 2/3
- ADC_GAIN_4_5: x 4/5
- ADC_GAIN_1: x 1
- ADC_GAIN_2: x 2
- ADC_GAIN_3: x 3
- ADC_GAIN_4: x 4
- ADC_GAIN_6: x 6
- ADC_GAIN_8: x 8
- ADC_GAIN_12: x 12
- ADC_GAIN_16: x 16
- ADC_GAIN_24: x 24
- ADC_GAIN_32: x 32
- ADC_GAIN_64: x 64
- ADC_GAIN_128: x 128
This property is required. Legal values: |
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Reference selection:
- ADC_REF_VDD_1: VDD
- ADC_REF_VDD_1_2: VDD/2
- ADC_REF_VDD_1_3: VDD/3
- ADC_REF_VDD_1_4: VDD/4
- ADC_REF_INTERNAL: Internal
- ADC_REF_EXTERNAL0: External, input 0
- ADC_REF_EXTERNAL1: External, input 1
This property is required. Legal values: |
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This property can be used to specify the voltage (in millivolts)
of the reference selected for this channel, so that applications
can get that value if needed for some calculations.
For the internal reference, the voltage can be usually obtained with
a dedicated ADC API call, so there is no need to use this property
in that case, but for other references this property can be useful.
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Acquisition time.
Use the ADC_ACQ_TIME macro to compose the value for this property
or pass ADC_ACQ_TIME_DEFAULT to use the default setting for a given
hardware (e.g. when the hardware does not allow to configure the
acquisition time).
This property is required. |
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When set, selects differential input mode for the channel. Otherwise,
single-ended mode is used unless the zephyr,input-negative property is
specified, in which case the differential mode is selected implicitly.
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Positive ADC input. Used only for drivers that select
the ADC_CONFIGURABLE_INPUTS Kconfig option.
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Negative ADC input. Used only for drivers that select
the ADC_CONFIGURABLE_INPUTS Kconfig option.
When specified, implies the differential input mode for the channel.
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ADC resolution to be used for the channel.
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Oversampling setting to be used for the channel.
When specified, each sample is averaged from 2^N conversion results
(where N is the provided value).
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Output pin selection for the current sources. The actual
interpretation depends on the driver. This is used only for drivers
which select the ADC_CONFIGURABLE_EXCITATION_CURRENT_SOURCE_PIN
Kconfig option.
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Output pin selection for the bias voltage. The actual interpretation
depends on the driver. This is used only for drivers which select
the ADC_CONFIGURABLE_VBIAS_PIN Kconfig option.
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Specifier cell names
io-channel cells: input