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ti,tca9546a (on i2c bus)

Vendor: Texas Instruments

Description

TCA9546a I2C switch

Each channel is represented by a separate devicetree child node
with a "ti,tca9546a-channel" compatible.
The channel node can then be used as a standard i2c bus controller
like in the following simplified example:

    /* The tca9546a node must be a child of an i2c controller */
    mux: tca9546a@77 {
        compatible = "ti,tca9546a";
        reg = <0x77>;

        mux_i2c@0 {
            compatible = "ti,tca9546a-channel";
            reg = <0>;

            temp_sens_0: tmp116@49 {
                compatible = "ti,tmp116";
                reg = <0x49>;
            };
        };

        mux_i2c@1 {
            compatible = "ti,tca9546a-channel";
            reg = <1>;

            temp_sens_1: tmp116@49 {
                compatible = "ti,tmp116";
                reg = <0x49>;
            };
        };
    };

Properties

Top level properties

These property descriptions apply to “ti,tca9546a” nodes themselves. This page also describes child node properties in the following sections.

Properties not inherited from the base binding file.

Name

Type

Details

supply-gpios

phandle-array

GPIO specifier that controls power to the device.

This property should be provided when the device has a dedicated
switch that controls power to the device.  The supply state is
entirely the responsibility of the device driver.

Contrast with vin-supply.

vin-supply

phandle

Reference to the regulator that controls power to the device.
The referenced devicetree node must have a regulator compatible.

This property should be provided when device power is supplied
by a shared regulator.  The supply state is dependent on the
request status of all devices fed by the regulator.

Contrast with supply-gpios.  If both properties are provided
then the regulator must be requested before the supply GPIOS is
set to an active state, and the supply GPIOS must be set to an
inactive state before releasing the regulator.

Child node properties

Name

Type

Details

#address-cells

int

number of address cells in reg property

This property is required.

Constant value: 1

#size-cells

int

number of size cells in reg property

This property is required.

clock-frequency

int

Initial clock frequency in Hz

label

string

Human readable string describing the device (used as device_get_binding() argument)

This property is required.

See Important properties for more information.

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

clocks

phandle-array

Clock gate information

clock-names

string-array

name of each clock

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.