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nxp,lpc-iocon-pinctrl

Vendor: NXP Semiconductors

Description

LPC pinctrl node. This node defines pin configurations in pin groups, and has
the 'pinctrl' node identifier in the SOC's devicetree. Each group within the
pin configuration defines a peripheral's pin configuration. Each numbered
subgroup represents pins with shared configuration for that peripheral. The
'pinmux' property of each group selects the pins to be configured with these
properties. For example, here is a configuration for FLEXCOMM0 pins:

pinmux_flexcomm0_usart: pinmux_flexcomm0_usart {
  group0 {
    pinmux = <FC0_TXD_SCL_MISO_WS_PIO0_30>,
            <FC0_RXD_SDA_MOSI_DATA_PIO0_29>;
    slew-rate = "standard";
  };
};

If only the required properties are supplied, the ICON_PIO register will
be assigned the following values:
IOCON_FUNC=<pin mux selection>,
IOCON_MODE=0,
IOCON_SLEW=<slew-rate selection>,
IOCON_INVERT=0,
IOCON_DIGIMODE=1,
IOCON_OD=0,

Values for I2C type and analog type pins have the following defaults:
IOCON_ASW=0
IOCON_SSEL=0
IOCON_FILTEROFF=1
IOCON_ECS=0
IOCON_EGP=1
IOCON_I2CFILTER=1

Note the inherited pinctrl properties defined below have the following effects:
drive-open-drain: IOCON_OD=1
bias-pull-up: IOCON_MODE=2
bias-pull-down: IOCON_MODE=1
drive-push-pull: IOCON_MODE=3

Note: for the LPC11u6x, the following fields are also supported:
IOCON_HYS- set by input-schmitt-enable
IOCON_S_MODE- set by nxp,digital-filter
IOCON_CLKDIV- set by nxp,filter-clock-div
IOCON_FILTR- set by nxp,analog-filter

Properties

Top level properties

These property descriptions apply to “nxp,lpc-iocon-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,lpc-iocon-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

array

 
Pin mux selection for this group. See the SOC level pinctrl header
file in NXP's HAL for a defined list of these options.

This property is required.

slew-rate

string

 
Pin output slew rate. Sets the SLEW field in the IOCON register.
defaults to standard slew rate, due to this being the reset value of
the field.
0 SLEW_0- standard mode, output slew rate is slower
1 SLEW_1- fast mode, output slew rate is faster

Default value: standard

Legal values: 'standard', 'fast'

nxp,invert

boolean

 
Invert the pin input logic level

nxp,analog-mode

boolean

 
Set the pin to analog mode. Sets DIGIMODE=0, and ASW=1. Only valid for
analog type pins.

power-source

string

 
Pin output power source. Only valid for I2C mode pins running in I2C
mode.

Legal values: '3v3', '1v8'

nxp,digital-filter

boolean

 
Digital input filter. Noise pulses below 10ms are filtered out.

nxp,i2c-filter

string

 
I2C glitch filter speed. Only valid for I2C mode pins. Fast mode
typically only required for High speed I2C.

Legal values: 'slow', 'fast'

nxp,i2c-speed

string

 
I2C speed. Only valid for I2C mode pins. Fast mode should be used for
fast mode plus I2C.

Legal values: 'slow', 'fast'

nxp,i2c-pullup

boolean

 
Enable I2C pullup resistor. If not present, pin is open drain in I2C
mode. Only valid for I2C mode pins in I2C mode

nxp,i2c-mode

boolean

 
Enable I2C mode for a pin. If not present, pin is in GPIO mode. Only
valid for I2C mode pins

bias-pull-up

boolean

 
enable pull-up resistor

bias-pull-down

boolean

 
enable pull-down resistor

drive-push-pull

boolean

 
drive actively high and low

drive-open-drain

boolean

 
drive with open drain (hardware AND)

input-schmitt-enable

boolean

 
enable schmitt-trigger mode