st,stm32-uart
Vendor: STMicroelectronics N.V.
Note
An implementation of a driver matching this compatible is available in drivers/serial/uart_stm32.c.
Description
These nodes are “uart” bus nodes.
STM32 UART
Properties
Node specific properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Reset information
This property is required. |
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Enable the single wire half-duplex communication.
Using this mode, TX and RX lines are internally connected and
only TX pin is used afterwards and should be configured.
RX/TX conflicts must be handled on user side.
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Swap the TX and RX pins. Used in case of a cross wired connection.
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Pin configuration/s for the first state. Content is specific to the
selected pin controller driver implementation.
This property is required. |
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Names for the provided states. The number of names needs to match the
number of states.
This property is required. |
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EXTI line number matching the device wakeup interrupt mask register.
This property is required on stm32 devices where the wakeup interrupt signal could be
configured masked at boot (sm32wl55 for instance), preventing the device to wakeup
the core from stop mode(s).
Valid range: 0 - 31
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Enable activating an external transeiver through the DE pin which must also be configured
using pinctrl.
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Defines the time between the activation of the DE signal and the beginning of the start bit.
It is expressed in 16th of a bit time.
Valid range: 0 - 31
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Defines the time between the activation of the DE signal and the beginning of the start bit.
It is expressed in 16th of a bit time.
Valid range: 0 - 31
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Invert the binary logic of the de pin. When enabled, physical logic levels are inverted and
we use 1=Low, 0=High instead of 1=High, 0=Low.
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Enables transmit and receive FIFO using default FIFO configuration (typically threshold is
set to 1/8).
In TX, FIFO allows to work in burst mode, easing scheduling of loaded applications. It also
allows more reliable communication with UART devices sensitive to variation of inter-frames
delays.
In RX, FIFO reduces overrun occurrences.
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Initial baud rate setting for UART
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Set to enable RTS/CTS flow control at boot time
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Configures the parity of the adapter. Enumeration id 0 for none, 1 for odd
and 2 for even parity. Default to none if not specified.
Legal values: |
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Sets the number of stop bits.
Legal values: |
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Sets the number of data bits.
Legal values: |
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Pin configuration/s for the second state. See pinctrl-0.
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Pin configuration/s for the third state. See pinctrl-0.
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Pin configuration/s for the fourth state. See pinctrl-0.
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Pin configuration/s for the fifth state. See pinctrl-0.
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Name of each reset
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Invert the binary logic of tx pin. When enabled, physical logic levels are inverted and
we use 1=Low, 0=High instead of 1=High, 0=Low.
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Invert the binary logic of rx pin. When enabled, physical logic levels are inverted and
we use 1=Low, 0=High instead of 1=High, 0=Low.
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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,stm32-uart” compatible.
Name |
Type |
Details |
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register space
This property is required. See Important properties for more information. |
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Clock gate information
This property is required. |
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interrupts for device
This property is required. See Important properties for more information. |
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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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name of each register space
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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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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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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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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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