st,stm32-i2c-v2

Vendor: STMicroelectronics N.V.

Note

An implementation of a driver matching this compatible is available in drivers/i2c/i2c_ll_stm32.c.

Description

These nodes are “i2c” bus nodes.

STM32 I2C V2 controller

Properties

Node specific properties

Properties not inherited from the base binding file.

Name

Type

Details

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.

timings

array

 
An optional table of pre-computed i2c timing values with the
matching clock configuration.

Precise timings values for a given Hardware can be pre-computed
with a tool like STM32CubeMX or directly from I2C_TIMINGR register
description.

Because timing value is valid for a given I2C peripheral clock
frequency and target I2C bus clock, each timing value must be
provided with the matching configuration.

The resulting table entries should look like <periph_clock
clock-frequency timing>

For example timings could be defined as

    timings = <64000000 I2C_BITRATE_STANDARD 0x10707DBC>,
              <64000000 I2C_BITRATE_FAST 0x00603D56>,
              <56000000 I2C_BITRATE_STANDARD 0x10606DA4>,
              <56000000 I2C_BITRATE_FAST 0x00501D63>;

scl-gpios

phandle-array

 
GPIO to which the I2C SCL signal is routed. This is only needed for
I2C bus recovery support.

sda-gpios

phandle-array

 
GPIO to which the I2C SDA signal is routed. This is only needed for
I2C bus recovery support.

clock-frequency

int

 
Initial clock frequency in Hz

sq-size

int

 
Size of the submission queue for blocking requests

Default value: 4

cq-size

int

 
Size of the completion queue for blocking requests

Default value: 4

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.

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-i2c-v2” compatible.

Name

Type

Details

reg

array

 
register space

This property is required.

See Important properties for more information.

interrupts

array

 
interrupts for device

This property is required.

See Important properties for more information.

#address-cells

int

 
number of address cells in reg property

This property is required.

Constant value: 1

#size-cells

int

 
number of size cells in reg property

This property is required.

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.

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.