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st,stm32-i2c-v2¶

Vendor: STMicroelectronics

Description¶

These nodes are “i2c” bus nodes.

STM32 I2C V2 controller

Properties¶

Properties not inherited from the base binding file.

Name

Type

Details

pinctrl-0

phandles

GPIO pin configuration for serial signals (SDA, SCL).  We expect
that the phandles will reference pinctrl nodes.

For example the I2C1 would be
   pinctrl-0 = <&i2c1_sda_pb11 &i2c1_scl_pb10>;

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>;

clock-frequency

int

Initial clock frequency in Hz

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