st,stm32-pinctrl

Vendor: STMicroelectronics

Description

STM32 Pin controller Node

Properties

Top level properties

These property descriptions apply to “st,stm32-pinctrl” nodes themselves. This page also describes child node properties in the following sections.

Node specific properties

Base properties

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,stm32-pinctrl” compatible.

Name

Type

Details

reg

array

 
register space

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

array

 
interrupts for device

See Important properties for more information.

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.

clocks

phandle-array

 
Clock gate information

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

Child node properties

Name

Type

Details

pinmux

int

 
Reused from https://github.com/torvalds/linux/blob/master/Documentation/devicetree/bindings/pinctrl/st,stm32-pinctrl.yaml
Integer array, represents gpio pin number and mux setting.
These defines are calculated as: ((port * 16 + line) << 8) | function
With:
- port: The gpio port index (PA = 0, PB = 1, ..., PK = 11)
- line: The line offset within the port (PA0 = 0, PA1 = 1, ..., PA15 = 15)
- function: The function number, can be:
* 0 : Alternate Function 0
* 1 : Alternate Function 1
* 2 : Alternate Function 2
* ...
* 15 : Alternate Function 15
* 16 : Analog
To simplify the usage, macro is available to generate "pinmux" field.
This macro is available here:
  -include/dt-bindings/pinctrl/stm32-pinctrl-common.h
Some examples of macro usage:
   GPIO A9 set as alernate function 2
... {
         pinmux = <STM32_PINMUX('A', 9, AF2)>;
};
   GPIO A9 set as analog
... {
         pinmux = <STM32_PINMUX('A', 9, ANALOG)>;
};

This property is required.

bias-disable

boolean

 
Pin bias (push-pull) disabled. This is the default pin configuration and will be applied if no bias- property is set.

bias-pull-down

boolean

 
Pull down on pin.

bias-pull-up

boolean

 
Pull up on pin.

drive-push-pull

boolean

 
Pin driven actively high and low. This is the default pin configuration and will be applied if no drive- property is set.

drive-open-drain

boolean

 
Pin driven in open drain.

slew-rate

string

 
Pin speed. Default to low-speed. For few pins (PA11 and PB3 depending on SoCs)hardware reset value could differ (very-high-speed). Carefully check reference manual for these pins.

Default value: low-speed

Legal values: 'low-speed', 'medium-speed', 'high-speed', 'very-high-speed'