nxp,s32k3-pinctrl
Vendor: NXP Semiconductors
Description
NXP S32 pinctrl node for S32K3 SoCs.
The NXP S32 pin controller is a singleton node responsible for controlling
the pin function selection and pin properties. This node, labeled 'pinctrl' in
the SoC's devicetree, will define pin configurations in pin groups. Each group
within the pin configuration defines the pin configuration for a peripheral,
and each numbered subgroup in the pin group defines all the pins for that
peripheral with the same configuration properties. The 'pinmux' property in
a group selects the pins to be configured, and the remaining properties set
configuration values for those pins.
For example, to configure the pinmux for UART0, modify the 'pinctrl' from your
board or application devicetree overlay as follows:
/* Include the SoC package header containing the predefined pins definitions */
#include <nxp/s32/S32K344-257BGA-pinctrl.h>
&pinctrl {
uart0_default: uart0_default {
group1 {
pinmux = <PTA3_LPUART0_TX_O>;
output-enable;
};
group2 {
pinmux = <PTA28_LPUART0_RX>;
input-enable;
};
};
};
The 'uart0_default' node contains the pin configurations for a particular state
of a device. The 'default' state is the active state. Other states for the same
device can be specified in separate child nodes of 'pinctrl'.
In addition to 'pinmux' property, each group can contain other properties such as
'bias-pull-up' or 'slew-rate' that will be applied to all the pins defined in
'pinmux' array. To enable the input buffer use 'input-enable' and to enable the
output buffer use 'output-enable'.
To link the pin configurations with UART0 device, use pinctrl-N property in the
device node, where 'N' is the zero-based state index (0 is the default state).
Following previous example:
&uart0 {
pinctrl-0 = <&uart0_default>;
pinctrl-names = "default";
status = "okay";
};
If only the required properties are supplied, the pin configuration register
will be assigned the following values:
- input and output buffers disabled
- internal pull not enabled
- slew rate "fastest"
- invert disabled
- drive strength disabled.
Additionally, following settings are currently not supported and default to
the values indicated below:
- Safe Mode Control (disabled)
- Pad Keeping (disabled)
- Input Filter (disabled).
Properties
Top level properties
These property descriptions apply to “nxp,s32k3-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 “nxp,s32k3-pinctrl” compatible.
Name |
Type |
Details |
|---|---|---|
|
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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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|
Power domain the device belongs to.
The device will be notified when the power domain it belongs to is either
suspended or resumed.
|
|
|
Automatically configure the device for runtime power management after the
init function runs.
|
|
|
List of power states that will disable this device power.
|
|
|
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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register space
See Important properties for more information. |
|
|
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. This property is deprecated. |
|
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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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mailbox / IPM channels specifiers
|
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Provided names of mailbox / IPM channel specifiers
|
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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
|
Grandchild node properties
Name |
Type |
Details |
|---|---|---|
|
|
disable any pin bias
|
|
|
enable pull-up resistor
|
|
|
enable pull-down resistor
|
|
|
enable input on pin (e.g. enable an input buffer, no effect on output)
|
|
|
enable output on a pin without actively driving it (e.g. enable an output
buffer)
|
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An array of pins sharing the same group properties. The pins must be
defined using the S32_PINMUX macros that encodes all the pin muxing
information in a 32-bit value.
This property is required. |
|
|
Slew rate control. Can be either slowest or fastest setting.
See the SoC reference manual for applicability of this setting.
Default value: Legal values: |
|
|
Invert the signal selected by Source Signal Selection (SSS) before
transmitting it to the associated destination (chip pin or module port).
|
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Drive strength enable.
See the SoC reference manual for applicability of this setting.
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