espressif,esp32-timer
Vendor: Espressif Systems
Note
An implementation of a driver matching this compatible is available in drivers/counter/counter_esp32_tmr.c.
Description
Espressif's general-purpose Timers.
Each Timer is part of a Timer Group and the number of available Timers
is SoC-dependent.
As as example, ESP32 has 4 Timers available, which are split in two
different groups (TIM0_G0, TIM1_G0, TIM0_G1 and TIM1_G1).
In order to use one of the available timers on your application add
a <board>.overlay file with contents as below
&timer0 {
status = "okay";
prescaler = <10>;
};
From the above, setting 'status' is required while the prescaler is
optional. Check below for more information on the prescaler.
Properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
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The Timer Group index to which a timer belongs.
This property is required. Legal values: |
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The index that identifies a timer within a Timer Group.
This property is required. Legal values: |
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The prescaler value defines the factor by which the APB clock will be
divided. The outcome of which serves as clock reference to the Timer
itself.
The allowed values for this property are in the range [2..65535].
Values above that range will be 16-bit-masked. Values 0 and 1 will be
forced to 2.
Default value: |
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 “espressif,esp32-timer” compatible.
Name |
Type |
Details |
|---|---|---|
|
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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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register space
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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