microcrystal,rv3028 (on i2c bus)

Vendor: Micro Crystal AG

Note

An implementation of a driver matching this compatible is available in drivers/rtc/rtc_rv3028.c.

Description

Micro Crystal RV3028 RTC

Properties

Properties not inherited from the base binding file.

Name

Type

Details

clkout-frequency

int

 
Frequency of the CLKOUT signal in Hertz (Hz). If omitted, the CLKOUT pin is LOW.

Legal values: 32768, 8192, 1024, 64, 32, 1

backup-switch-mode

string

 
Automatic backup switchover function selection:
  - disabled: The switchover function is disabled - only one power supply available (VDD)
  - direct: Direct Switching Mode (DSM): when VDD < VBACKUP, switchover occurs from VDD to
    VBACKUP without requiring VDD to drop below VTH:LSM (2.0 V)
  - level: Level Switching Mode (LSM): when VDD < VTH:LSM (2.0 V) AND VBACKUP > VTH:LSM,
    switchover occurs from VDD to VBACKUP

This property is required.

Legal values: 'disabled', 'direct', 'level'

trickle-resistor-ohms

int

 
Enable the trickle charger with provided current-limiting resistance in ohms. The trickle
charger allows a battery or supercapacitor connected to VBACKUP to be charged.

Legal values: 3000, 5000, 9000, 15000

int-gpios

phandle-array

 
GPIO connected to the RV3028 INT interrupt output. This signal is open-drain, active low.

alarms-count

int

 
Number of alarms supported by RTC device. The number of
alarms defaults to 0, which indicates that the RTC has
no alarms.

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.