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# Copyright (c) 2022 Vaishnav Achath
# SPDX-License-Identifier: Apache-2.0
description: |
TI SimpleLink CC13xx / CC26xx pinctrl node.
Device pin configuration should be placed in the child nodes of this node.
Populate the 'pinmux' field with a pair consisting of a pin number and its IO
functions.
The node has the 'pinctrl' node label set in your SoC's devicetree,
so you can modify it like this:
&pinctrl {
/* your modifications go here */
};
All device pin configurations should be placed in child nodes of the
'pinctrl' node, as in the i2c0 example shown at the end.
Here is a list of
supported standard pin properties:
- bias-disable: Disable pull-up/down.
- bias-pull-down: Enable pull-down resistor.
- bias-pull-up: Enable pull-up resistor.
- drive-open-drain: Output driver is open-drain.
- drive-open-drain: Output driver is open-source.
- input-enable: enable input.
- input-schmitt-enable: enable input schmitt circuit.
An example for CC13XX family, include the chip level pinctrl
DTSI file in the board level DTS:
#include <dt-bindings/pinctrl/cc13xx_cc26xx-pinctrl.h>
We want to configure the I2C pins to open drain, with pullup enabled
and input enabled.
To change a pin's pinctrl default properties add a reference to the
pin in the board's DTS file and set the properties.
&i2c0 {
pinctrl-0 = <&i2c0_scl_default &i2c0_sda_default>;
pinctrl-1 = <&i2c0_scl_sleep &i2c0_sda_sleep>;
pinctrl-names = "default", "sleep";
}
The i2c0_scl_default corresponds to the following in the board dts file:
&pinctrl {
i2c0_scl_default: i2c0_scl_default {
pinmux = <4 IOC_PORT_MCU_I2C_MSSCL>;
bias-pull-up;
drive-open-drain;
input-enable;
};
};
compatible: "ti,cc13xx-cc26xx-pinctrl"
include: base.yaml
properties:
reg:
required: true
child-binding:
description: |
This binding gives a base representation of the CC13XX/CC26XX
pins configuration.
include:
- name: pincfg-node.yaml
property-allowlist:
- bias-disable
- bias-pull-down
- bias-pull-up
- drive-open-drain
- drive-open-source
- input-enable
- input-schmitt-enable
properties:
pinmux:
required: true
type: array
description: |
CC13XX/CC26XX pin's configuration (IO pin, IO function).