nxp,lptmr
Description
NXP LPTMR
Properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Counter clock frequency
This property is required. |
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Selects the clock to be used by the LPMTR prescaler/glitch filter.
In time counter mode, this field selects the input clock to the prescaler.
In pulse counter mode, this field selects the input clock to the glitch filter.
The clock connections vary by device, see the device reference manual for
more details.
This property is required. Legal values: |
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When LPTMR is in Pulse mode, this value
will be used to determine the "rising-edge
source pin" to increment the lptmr counter.
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When LPTMR is in Pulse mode, this value
will set the counter to active low.
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Represents the width of the counter in bits.
This property is required. |
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Controls the clocking of Counter (CNR). If false, the output of the prescaler
or glitch filter clocks CNR. If true, the selected prescaler clock in Time
Counter mode, or the selected input source in Pulse Counter mode, directly
clocks CNR.
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Configures the size of the prescaler in Time Counter mode and the width of the
glitch filter in Pulse Counter mode.
Note: If ``prescale-glitch-filter-bypass`` is set, this property is ignored.
When in prescaler mode, prescaler divides the prescaler clock by
2^(prescaler-glitch-filter + 1)
When in pulse mode, prescale-glitch-filter = 0 is not supported for glitch
filtering. To request no filtering, set ``prescale-glitch-filter-bypass``.
If prescale-glitch-filter is greater than 0, glitch filter recognizes change
on input pin after 2^prescale-glitch-filter rising clock edges.
Legal values: |
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This value determines rather the LPTMR is configured
for Time-Counter mode or for Pulse mode.
0 <- LPTMR is configured for Time Counter Mode.
1 <- LPTMR is configured for Pulse Mode.
Legal values: |
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Selects how the LPTMR counter behaves on compare events.
- restart(default): Counter resets after matching the compare value.
- free-run: Compare events do not reset the counter; it resets on overflow.
Default value: Legal values: |
Deprecated properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
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This property has been deprecated and replaced by prescale-glitch-filter.
It no longer has any functional impact. Any value assigned to this property
will be disregarded. Consequently, the prescaler will be bypassed.
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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 “nxp,lptmr” compatible.
Name |
Type |
Details |
|---|---|---|
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Information used to address the device. The value is specific to
the device (i.e. is different depending on the compatible
property).
The "reg" property is typically a sequence of (address, length) pairs.
Each pair is called a "register block". Values are
conventionally written in hex.
For details, see "2.3.6 reg" in Devicetree Specification v0.4.
This property is required. See Important properties for more information. |
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Information about interrupts generated by the device, encoded as an array
of one or more interrupt specifiers. The format of the data in this property
varies by where the device appears in the interrupt tree. Devices with the same
"interrupt-parent" will use the same format in their interrupts properties.
For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.
This property is required. See Important properties for more information. |
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Indicates the operational status of the hardware or other
resource that the node represents. In particular:
- "okay" means the resource is operational and, for example,
can be used by device drivers
- "disabled" means the resource is not operational and the system
should treat it as if it is not present
For details, see "2.3.4 status" in Devicetree Specification v0.4.
Legal values: See Important properties for more information. |
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This property is a list of strings that essentially define what
type of hardware or other resource this devicetree node
represents. Each device driver checks for specific compatible
property values to find the devicetree nodes that represent
resources that the driver should manage.
The recommended format is "vendor,device", The "vendor" part is
an abbreviated name of the vendor. The "device" is usually from
the datasheet.
The compatible property can have multiple values, ordered from
most- to least-specific. Having additional values is useful when the
device is a specific instance of a more general family, to allow the
system to match the most specific driver available.
For details, see "2.3.1 compatible" in Devicetree Specification v0.4.
This property is required. See Important properties for more information. |
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Optional names given to each register block in the "reg" property.
For example:
/ {
soc {
#address-cells = <1>;
#size-cells = <1>;
uart@1000 {
reg = <0x1000 0x2000>, <0x3000 0x4000>;
reg-names = "foo", "bar";
};
};
};
The uart@1000 node has two register blocks:
- one with base address 0x1000, size 0x2000, and name "foo"
- another with base address 0x3000, size 0x4000, and name "bar"
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Extended interrupt specifier for device, used as an alternative to
the "interrupts" property.
For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.
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Optional names given to each interrupt generated by a device.
The interrupts themselves are defined in either "interrupts" or
"interrupts-extended" properties.
For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.
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If present, this refers to the node which handles interrupts generated
by this device.
For details, see "2.4 Interrupts and Interrupt Mapping" in
Devicetree Specification v0.4.
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Human readable string describing the device. Use of this property is
deprecated except as needed on a case-by-case basis.
For details, see "4.1.2 Miscellaneous Properties" in Devicetree
Specification v0.4.
See Important properties for more information. |
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Information about the device's clock providers. In general, this property
should follow conventions established in the dt-schema binding:
https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/clock/clock.yaml
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Optional names given to each clock provider in the "clocks" property.
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This property encodes the number of <u32> cells used by address fields
in "reg" properties in this node's children.
For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
Specification v0.4.
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This property encodes the number of <u32> cells used by size fields in
"reg" properties in this node's children.
For details, see "2.3.5 #address-cells and #size-cells" in Devicetree
Specification v0.4.
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DMA channel specifiers relevant to the device.
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Optional names given to the DMA channel specifiers in the "dmas" property.
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IO channel specifiers relevant to the device.
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Optional names given to the IO channel specifiers in the "io-channels" property.
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Mailbox / IPM channel specifiers relevant to the device.
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Optional names given to the mbox specifiers in the "mboxes" property.
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Power domain specifiers relevant to the device.
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Optional names given to the power domain specifiers in the "power-domains" property.
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Number of cells in power-domains property
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HW spinlock id relevant to the device.
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Optional names given to the hwlock specifiers in the "hwlocks" 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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