st,stm32-usart

Vendor: STMicroelectronics N.V.

Description

These nodes are “uart” bus nodes.

STM32 USART

Properties

Node specific properties

Properties not inherited from the base binding file.

Name	Type	Details
resets	phandle-array	Reset information This property is required.
single-wire	boolean	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.
tx-rx-swap	boolean	Swap the TX and RX pins. Used in case of a cross wired connection.
pinctrl-0	phandles	Pin configuration/s for the first state. Content is specific to the selected pin controller driver implementation. This property is required.
pinctrl-names	string-array	Names for the provided states. The number of names needs to match the number of states. This property is required.
wakeup-line	int	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
de-enable	boolean	Enable activating an external transeiver through the DE pin which must also be configured using pinctrl.
de-assert-time	int	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
de-deassert-time	int	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
de-invert	boolean	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.
fifo-enable	boolean	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.
current-speed	int	Initial baud rate setting for UART
hw-flow-control	boolean	Set to enable RTS/CTS flow control at boot time
parity	string	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: 'none', 'odd', 'even'
stop-bits	string	Sets the number of stop bits. Legal values: '0_5', '1', '1_5', '2'
data-bits	int	Sets the number of data bits. Legal values: 5, 6, 7, 8, 9
pinctrl-1	phandles	Pin configuration/s for the second state. See pinctrl-0.
pinctrl-2	phandles	Pin configuration/s for the third state. See pinctrl-0.
pinctrl-3	phandles	Pin configuration/s for the fourth state. See pinctrl-0.
pinctrl-4	phandles	Pin configuration/s for the fifth state. See pinctrl-0.
reset-names	string-array	Name of each reset
tx-invert	boolean	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.
rx-invert	boolean	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.

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-usart” compatible.

Name	Type	Details
reg	array	register space This property is required. See Important properties for more information.
clocks	phandle-array	Clock gate information This property is required.
interrupts	array	interrupts for device This property is required. See Important properties for more information.
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-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.
clock-names	string-array	name of each clock
#address-cells	int	number of address cells in reg property
#size-cells	int	number of size cells in reg property
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.