st,stm32wb0-pwr

Vendor: STMicroelectronics N.V.

Description

STM32WB0 power controller

Properties

Top level properties

These property descriptions apply to “st,stm32wb0-pwr” nodes themselves. This page also describes child node properties in the following sections.

Node specific properties

Properties not inherited from the base binding file.

Name

Type

Details

smps-mode

string

 
SMPS mode selection

OFF:
  - SMPS converter disabled
  - LDOs supply voltage: VDD

WARNING: The SMPS must not be disabled on board using the
'SMPS supply configuration', so this mode should NEVER be
selected on these boards. Only use this mode if your board
is using the 'NOSMPS supply configuration'.

Refer to RM0505 §5.5 "SMPS step down regulator" for details.

PRECHARGE: (also called BYPASS)
  - SMPS converter enabled - clock disabled
  - LDOs supply voltage: VDD (though SMPS)
    - Current supplied to LDOs can be limited
      (feature only supported on STM32WB05 / STM32WB09)

RUN: (also called ON)
  - SMPS converter enabled - clock enabled
  - LDOs supply voltage: regulated SMPS output
    - Target output voltage can be programmed

This property is required.

Legal values: 'OFF', 'PRECHARGE', 'RUN'

smps-bom

int

 
SMPS L/C BOM selection

Indicates which L/C BOM is present on the board:
  1: 1.5µH inductance, 2.2µF output capacitance
  2: 2.2µH inductance, 4.7µF output capacitance
  3: 10µH inductance, 4.7µF output capacitance
Refer to RM0505 §5.5 for more details about L/C BOM.

This property is required if `smps-mode` is not "OFF".

Legal values: 1, 2, 3

smps-clock-prescaler

int

 
SMPS clock prescaler factor

The SMPS clock, CLK_SMPS, comes from a 16 MHz source that
goes through one of two prescalers, with a respective
division factor of 2 and 4. This property selects which
prescaler should be used.

Setting this property to 2 results in CLK_SMPS = 8 MHz.
Setting this property to 4 results in CLK_SMPS = 4 MHz.

All features of the SMPS can be used regardless of which
prescaler has been chosen. Since a slower clock results
in less power consumption, this property defaults to 4.

This property is only used if `smps-mode` is not "OFF".

Default value: 4

Legal values: 2, 4

smps-lp-floating

boolean

 
Floating SMPS output in low-power state

If this property is set, the SMPS output pin (VFBSD)
is left floating when the SoC is in low-power state.

If this property is not set, the SMPS is placed in
PRECHARGE mode when the SoC is in low-power state.
(i.e., VFBSD voltage is equal to VDD)

smps-current-limit

string

 
SMPS output current limit (in mA)

The default value of 20 mA corresponds to the maximal
output current allowed for the SMPS, and is also equal
to the hardware reset configuration.

On STM32WB06 and STM32WB07, this property is ignored as
the output current limitation feature is not available.

This property is only used if `smps-mode` is "PRECHARGE".

Default value: 20

Legal values: '2_5', '5', '10', '20'

smps-output-voltage

string

 
SMPS regulated output voltage

The default value corresponds to the hardware reset
configuration of 1.40V regulated output.

This property is only used if `smps-mode` is "RUN".

Default value: 1V40

Legal values: '1V20', '1V25', '1V30', '1V35', '1V40', '1V45', '1V50', '1V55', '1V60', '1V65', '1V70', '1V75', '1V80', '1V85', '1V90', '1V95'

wkup-pins-nb

int

 
Max nbr of system wake-up pins.
For example wkup-pins-nb = <8>; on the stm32u5

wkup-pin-srcs

int

 
Number of wake-up GPIO sources to select from for each wake-up pin.
If not specified, that means there is only 1 GPIO source for each
wake-up pin.

For example, each wake-up pin on STM32U5 is associated with
4 wake-up sources, 3 of them correspond to GPIOs.

wkup-pins-pol

boolean

 
True if SoC has a wake-up pins polarity config register

wkup-pins-pupd

boolean

 
True if SoC has pull-up/down config register(s) for GPIO ports
that are associated with wake-up pins.

Deprecated node specific properties

Deprecated properties not inherited from the base binding file.

(None)

Base properties

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 “st,stm32wb0-pwr” compatible.

Name

Type

Details

reg

array

 
register space

This property is required.

See Important properties for more information.

#address-cells

int

 
number of address cells in reg property

Constant value: 1

#size-cells

int

 
number of size cells in reg property

status

string

 
indicates the operational status of a device

Legal values: 'ok', 'okay', 'disabled', 'reserved', 'fail', 'fail-sss'

See Important properties for more information.

compatible

string-array

 
compatible strings

This property is required.

See Important properties for more information.

reg-names

string-array

 
name of each register space

interrupts

array

 
interrupts for device

See Important properties for more information.

interrupts-extended

compound

 
extended interrupt specifier for device

interrupt-names

string-array

 
name of each interrupt

interrupt-parent

phandle

 
phandle to interrupt controller node

label

string

 
Human readable string describing the device (used as device_get_binding() argument)

See Important properties for more information.

This property is deprecated.

clocks

phandle-array

 
Clock gate information

clock-names

string-array

 
name of each clock

dmas

phandle-array

 
DMA channels specifiers

dma-names

string-array

 
Provided names of DMA channel specifiers

io-channels

phandle-array

 
IO channels specifiers

io-channel-names

string-array

 
Provided names of IO channel specifiers

mboxes

phandle-array

 
mailbox / IPM channels specifiers

mbox-names

string-array

 
Provided names of mailbox / IPM channel specifiers

power-domains

phandle-array

 
Power domain specifiers

power-domain-names

string-array

 
Provided names of power domain specifiers

#power-domain-cells

int

 
Number of cells in power-domains property

zephyr,deferred-init

boolean

 
Do not initialize device automatically on boot. Device should be manually
initialized using device_init().

wakeup-source

boolean

 
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.

zephyr,pm-device-runtime-auto

boolean

 
Automatically configure the device for runtime power management after the
init function runs.

zephyr,disabling-power-states

phandles

 
List of power states that will disable this device power.

Child node properties

Name

Type

Details

reg

array

 
Wake-up pin identifier, same as "index" in node name

This property is required.

See Important properties for more information.

wkup-gpios

phandle-array

 
Specifies the GPIOs, if any, that are associated with the wake-up pin.

For example, for GPIO B2 associated with wakeup source 1 on wake-up
pin 1 on STM32U5 SoCs:
wkup-gpios = <&gpiob 2 STM32_PWR_WKUP_PIN_SRC_1>, <...>;