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# Copyright 2022, NXP
# SPDX-License-Identifier: Apache-2.0
description: |
RT600/RT500 pin control 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_1>,
<FC0_RXD_SDA_MOSI_DATA_PIO0_2>;
slew-rate = "normal";
drive-strength = "normal";
};
};
If only the required properties are supplied, the ICON_PIO register will
be assigned the following values:
IOCON_FUNC=<pin mux selection>,
IOCON_PUPDENA = 0,
IOCON_PUPDSEL = 0,
IOCON_IBENA = 0,
IOCON_SLEWRATE = <slew-rate selection>,
IOCON_FULLDRIVE = <drive-strength selection>,
IOCON_AMENA = 0,
IOCON_ODENA = 0,
IOCON_IIENA = 0,
Note the inherited pinctrl properties defined below have the following effects:
drive-open-drain: IOCON_ODENA=1
bias-pull-up: IOCON_PUPDENA=1, IOCON_PUPSEL=1
bias-pull-down: IOCON_PUPDENA=1, IOCON_PUPSEL=0
input-enable: IOCON_IBENA=1
compatible: "nxp,rt-iocon-pinctrl"
include:
- name: base.yaml
- name: pincfg-node-group.yaml
child-binding:
child-binding:
property-allowlist:
- drive-open-drain
- bias-pull-up
- bias-pull-down
- input-enable
child-binding:
description: iMX RT IOCON pin controller pin group
child-binding:
description: |
iMX RT IOCON pin controller pin configuration node
properties:
pinmux:
required: true
type: array
description: |
Pin mux selection for this group. See the SOC level pinctrl header
file in NXP's HAL for a defined list of these options.
slew-rate:
required: true
type: string
enum:
- "normal"
- "slow"
description: |
Pin output slew rate. Sets the SLEWRATE field in the IOCON register.
0 SLEWRATE_0- normal mode, output slew rate is standard
1 SLEWRATE_1- slow mode, output slew rate is slower
drive-strength:
required: true
type: string
enum:
- "normal"
- "high"
description: |
Pin output drive strength. Sets the FULLDRIVE field in the
IOCON register.
0 FULLDRIVE_0- Normal output drive mode
1 FULLDRIVE_1- Full output drive mode, output strength is twice
the drive strength of normal drive mode.
nxp,invert:
type: boolean
description: |
Invert the pin input logic level
nxp,analog-mode:
type: boolean
description: |
Set the pin to analog mode. Sets AMENA=1