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.
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 “ti,cc13xx-cc26xx-pinctrl” compatible.
Name |
Type |
Details |
|---|---|---|
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register space
This property is required. See Important properties for more information. |
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indicates the operational status of a device
Legal values: See Important properties for more information. |
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compatible strings
This property is required. See Important properties for more information. |
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name of each register space
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interrupts for device
See Important properties for more information. |
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extended interrupt specifier for device
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name of each interrupt
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phandle to interrupt controller node
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Human readable string describing the device (used as device_get_binding() argument)
See Important properties for more information. This property is deprecated. |
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Clock gate information
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name of each clock
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number of address cells in reg property
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number of size cells in reg property
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DMA channels specifiers
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Provided names of DMA channel specifiers
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IO channels specifiers
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Provided names of IO channel specifiers
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mailbox / IPM channels specifiers
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Provided names of mailbox / IPM channel specifiers
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Power domain specifiers
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Provided names of power domain specifiers
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Number of cells in power-domains property
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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
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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.
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Automatically configure the device for runtime power management after the
init function runs.
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List of power states that will disable this device power.
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Child node properties
Name |
Type |
Details |
|---|---|---|
|
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CC13XX/CC26XX pin's configuration (IO pin, IO function).
This property is required. |
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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: Legal values: |
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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
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disable any pin bias
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enable pull-up resistor
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enable pull-down resistor
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drive with open drain (hardware AND)
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drive with open source (hardware OR)
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enable input on pin (e.g. enable an input buffer, no effect on output)
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enable schmitt-trigger mode
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