ti,cc13xx-cc26xx-pinctrl

Vendor: Texas Instruments

Note

An implementation of a driver matching this compatible is available in drivers/pinctrl/pinctrl_cc13xx_cc26xx.c.

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.
- drive-strength: Minimum current that can be sourced from the pin.
- input-enable: enable input.
- input-schmitt-enable: enable input schmitt circuit.
- ti,input-edge-detect: enable and configure edge detection interrupts

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;
    };
  };

To configure an input pin with edge detection (e.g. to count pulses):

  &pinctrl {
    gpt0_edge_counter: gpt0_edge_counter {
      pinmux = <15 IOC_PORT_MCU_PORT_EVENT0>;
      input-enable;
      bias-pull-up;
      ti,input-edge-detect = <IOC_RISING_EDGE>;
    };
  };

To configure an output pin (e.g. for PWM output):

  &pinctrl {
    gpt0_pwm: gpt0_pwm {
      pinmux = <16 IOC_PORT_MCU_PORT_EVENT1>;
      bias-disable;
      drive-strength = <8>; /* in mA */
    };
  };

Properties

Top level properties

These property descriptions apply to “ti,cc13xx-cc26xx-pinctrl” nodes themselves. This page also describes child node properties in the following sections.

Node specific propertiesDeprecated node specific propertiesBase properties

Properties not inherited from the base binding file.

(None)

Child node properties

Name	Type	Details
pinmux	array	CC13XX/CC26XX pin's configuration (IO pin, IO function). This property is required.
drive-strength	int	The drive strength controls the minimum output driver strength of an I/O pin configured as an output. 2: min 2 mA (SoC default) 4: min 4 mA 8: min 8 mA for double drive strength IOs, min 4 mA for normal IOs Default value: 2 Legal values: 2, 4, 8
ti,input-edge-detect	int	Enables or disables the edge detection interrupt and configures it: IOC_NO_EDGE: No edge detection (SoC default) IOC_FALLING_EDGE: Edge detection on falling edge IOC_RISING_EDGE: Edge detection on rising edge IOC_BOTH_EDGES: Edge detection on both edges
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)
drive-open-source	boolean	drive with open source (hardware OR)
input-enable	boolean	enable input on pin (e.g. enable an input buffer, no effect on output)
input-schmitt-enable	boolean	enable schmitt-trigger mode