st,stm32f1-pinctrl¶
Vendor: STMicroelectronics
Description¶
STM32 Pin controller Node
Properties¶
Top level properties¶
These property descriptions apply to “st,stm32f1-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,stm32f1-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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Adapted 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 << 6) | remap)
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 configuration mode, can be:
* 0 : Alternate function output
* 1 : Input
* 2 : Analog
- remap: The pin remapping configuration. It allows to assign the pin
function to a different peripheral. Remain configuration can be:
* 0 : No remap
* 1 : Partial remap 1
* 2 : Partial remap 2
* 3 : Partial remap 3
* 4 : Full remap
To simplify the usage, macro is available to generate "pinmux" field.
This macro is available here:
-include/dt-bindings/pinctrl/stm32f1-pinctrl.h
Some examples of macro usage:
GPIO A9 set as alernate with no remap
... {
pinmux = <STM32F1_PINMUX('A', 9, ALTERNATE, REMAP_NO)>;
};
GPIO A9 set as alernate with full remap
... {
pinmux = <STM32F1_PINMUX('A', 9, ALTERNATE, REMAP_FULL)>;
};
GPIO A9 set as input
... {
pinmux = <STM32F1_PINMUX('A', 9, GPIO_IN, REMAP_NO)>;
};
This property is required. |
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Pin bias (push-pull) disabled. This is the default pin
configuration and will be applied if no bias- property is
specified. Only available in input mode ("floating" configuration).
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Weak pull down resistor enabled. Not compatible with
output configuration modes (atlernate or general purpose output).
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Weak pull up resistor enabled. Not compatible with
output configuration modes (atlernate or general purpose output).
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Pin driven actively high and low. This is the default pin
configueration and will be applied if no drive- property is
specified. Only valid for output configuration modes.
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Pin driven in open drain. Only valid for output
configuration modes.
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Pin output mode, maximum achievable speed. Only applies to
output mode (alternate).
Default value: Legal values: |