st,stm32-pinctrl¶
Vendor: STMicroelectronics
Description¶
STM32 Pin controller Node
Based on pincfg-node.yaml binding.
Note: `bias-disable` and `drive-push-pull` are default pin configurations.
They will be applied in case no `bias-foo` or `driver-bar` properties
are set.
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.
Properties not inherited from the base binding file.
(None)
Deprecated 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 |
|---|---|---|
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register space
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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interrupts for device
See Important properties for more information. |
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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. |
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Clock gate information
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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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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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Child node properties¶
Name |
Type |
Details |
|---|---|---|
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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. |
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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: Legal values: |
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disable any pin bias
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enable pull-up resistor
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enable pull-down resistor
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drive actively high and low
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drive with open drain (hardware AND)
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