maxim,ds2485 (on i2c bus)
Vendor: Maxim Integrated Products
Note
An implementation of a driver matching this compatible is available in drivers/w1/w1_ds2485.c.
Description
These nodes are “w1” bus nodes.
This is a representation of the Maxim DS2485 I2C 1-Wire master w/ memory
Properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Enable the active pullup for the 1-Wire bus.
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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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Default Low-to-High Switching Threshold.
Only the following values are allowed:
low: 0.25 x VCC, no hysteresis
medium: 0.40 x VCC, no hysteresis (recommended for most configurations)
high: 0.75 x VCC, with hysteresis
off: off (chip reset value)
This property is required. Legal values: |
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Default Active Pullup on Threshold configuration.
For configurations with a single slave a "low" active pull
threshold is recommended.
Only the following values are allowed:
low: 0.25 x VCC (recommended for most configurations)
medium: 0.40 x VCC
high: 0.75 x VCC
off: off (chip reset value)
This property is required. Legal values: |
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Default 1-Wire Weak Pullup Resistance in ohms.
For most configurations with a single slave "1000" ohms are recommended,
but some devices and multidrop configurations might need a stronger pullup.
To enter floating condition, it is suggested to switch the weak-pull up
to extern and disable the switching as well as the active-pull threshold.
Only the following values are allowed:
"extern" (chip reset value)
"500"
"1000" (recommended for most configurations)
"333"
This property is required. Legal values: |
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Default slew for standard speed mode in ns. Only the following values are
allowed:
50
150 (default; chip reset value)
1300
Default value: Legal values: |
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Default slew for overdrive speed mode in ns. Only the following values are
allowed:
50 (default; chip reset value)
150
Default value: 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 “maxim,ds2485” 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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Power domain the device belongs to.
The device will be notified when the power domain it belongs to is either
suspended or resumed.
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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
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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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
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