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nxp,mcux-rt11xx-pinctrl

Vendor: NXP Semiconductors

Description

The node has the 'pinctrl' node label set in MCUX RT SoC's devicetree. These
nodes can be autogenerated using the MCUXpresso config tools combined with
the rt_dts_gen.py script in NXP's HAL. The mux, mode, input, daisy, and cfg
fields in a group select the pins to be configured, and the remaining
devicetree properties set configuration values for those pins
for example, here is an group configuring LPUART1 pins:

group0 {
    pinmux = <&iomuxc_gpio_ad_25_lpuart1_rxd>,
        <&iomuxc_gpio_ad_24_lpuart1_txd>;
    drive-strength = "high";
    slew-rate = "slow";
};

This will select GPIO_AD_25 as LPUART1 RX, and GPIO_AD_24 as LPUART1 TX.
Both pins will be configured with a weak latch, high drive strength,
and slow slew rates.
Note that the soc level iomuxc dts file can be examined to find the possible
pinmux options. Here are the affects of each property on the
IOMUXC SW_PAD_CTL register:
drive-open-drain: ODE/ODE_LPSR=1
input-enable: SION=1 (in SW_MUX_CTL_PAD register)
bias-pull-down: PUE=1, PUS=0
bias-pull-up: PUE=1, PUS=1
bias-disable: PULL=11 (in supported registers)
slew-rate: SRE=<enum_idx>
drive-strength: DSE=<enum_idx>

If only required properties are supplied, the pin will have the following
configuration:
ODE=0
SION=0
PUE=0
PUS=0
SRE=0
DSE=0

For registers with PDVR and PULL fields, these are the defaults:
PULL=11
PDRV=0

Properties

Top level properties

These property descriptions apply to “nxp,mcux-rt11xx-pinctrl” nodes themselves. This page also describes child node properties in the following sections.

Node specific properties

Deprecated node specific properties

Base properties

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,mcux-rt11xx-pinctrl” compatible.

Name

Type

Details

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

array

 
register space

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

mboxes

phandle-array

 
mailbox / IPM channels specifiers

mbox-names

string-array

 
Provided names of mailbox / IPM 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.

power-domain

phandle

 
Power domain the device belongs to.

The device will be notified when the power domain it belongs to is either
suspended or resumed.

Grandchild node properties

Name

Type

Details

pinmux

phandles

 
Pin mux selections for this group. See the soc level iomuxc DTSI file
for a defined list of these options.

This property is required.

drive-strength

string

 
Pin output drive strength. Sets the DSE field in the IOMUXC peripheral.
0 (normal) - sets pin to normal drive strength
1 (high) - sets pin to high drive strength

Legal values: 'normal', 'high'

slew-rate

string

 
Select slew rate for pin. Corresponds to SRE field in IOMUXC peripheral
0 (fast) — Fast Slew Rate
1 (slow) — Slow Slew Rate

Legal values: 'fast', 'slow'

bias-disable

boolean

 
disable any pin bias

bias-pull-up

boolean

 
enable pull-up resistor

bias-pull-down

boolean

 
enable pull-down resistor

drive-open-drain

boolean

 
drive with open drain (hardware AND)

input-enable

boolean

 
enable input on pin (no effect on output, such as enabling an input
buffer)