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maxim,ds2485 (on i2c bus)

Vendor: Maxim Integrated Products

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

active-pullup

boolean

 
Enable the active pullup for the 1-Wire bus.

supply-gpios

phandle-array

 
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.

vin-supply

phandle

 
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.

switching-threshold

string

 
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: 'low', 'medium', 'high', 'off'

active-pull-threshold

string

 
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: 'low', 'medium', 'high', 'off'

weak-pullup

string

 
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: 'extern', '500', '1000', '333'

standard-slew

int

 
Default slew for standard speed mode in ns. Only the following values are
allowed:
  50
  150   (default; chip reset value)
  1300

Default value: 150

Legal values: 50, 150, 1300

overdrive-slew

int

 
Default slew for overdrive speed mode in ns. Only the following values are
allowed:
  50    (default; chip reset value)
  150

Default value: 50

Legal values: 50, 150