st,stm32wb0-pwr
Vendor: STMicroelectronics
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.
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Max nbr of system wake-up pins.
For example wkup-pins-nb = <8>; on the stm32u5
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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.
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True if SoC has a wake-up pins polarity config register
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True if SoC has pull-up/down config register(s) for GPIO ports
that are associated with wake-up pins.
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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: |
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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: |
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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: Legal values: |
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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)
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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: Legal values: |
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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: 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 “st,stm32wb0-pwr” 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
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
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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Wake-up pin identifier, same as "index" in node name
This property is required. See Important properties for more information. |
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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>, <...>;
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