slcd-panel
Description
Segment LCD Panel Device
Represents a SLCD(segment LCD) panel connected to an SLCD controller.
The SLCD panel defines the characteristics of the display including
segment type, how many positions of digits/letters and indicators, the
front plane pins and back plane COMs used by this panel, and the
multiplexing configuration.
Properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Number of segments per character position.
- 7: Standard 7-segment display (segments A to G, support digits 0 to 9)
- 14: 14-segment display (not supported yet)
- 16: 16-segment display (not supported yet)
Default value: Legal values: |
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When enabled, the panel mounted on board is rotated 180 degrees.
This is useful for panels that are 180-degree symmetric and can only be
mounted on board rotated.
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2-D array of the pins that controls each segment.
Array dimensions: num-positions x num-segments
For a 7-segment(segment A to G) display with 6 positions, array size
is 6 x 7 = 42 elements
Example: If segment A (first segment) of position 1 (zero based index) is
controlled by pin 8 com 3, then the (1,0) element of this array is 8.
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2-D array of the coms that controls each segment.
Array dimensions: num-positions x num-segments
For a 7-segment(segment A to G) display with 6 positions, array size
is 6 x 7 = 42 elements
Example: If segment A (first segment) of position 1 (zero based index) is
controlled by pin 8 com 3, then the (1,0) element of this array is 3.
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Number of special indicators on the display.
Indicators are individual segments that are not part of standard character positions.
For example, a colon, decimal point, or status indicator would count as one indicator.
Default value: |
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1-D array of the pins that controls each indicator.
Example: if indicator 0 controlled by pin 15, COM4, the first element of
this array is 15.
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1-D array of the coms that controls each indicator.
Example: if indicator 0 controlled by pin 15, COM4, the first element of
this array is 4.
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List of indicator indices for the combined colon column at each inter-digit gap.
Length must be columns - 1. Use 0xFF for gaps that have no colon indicator.
When writing ':', this indicator is used preferentially. If absent or 0xFF at a gap,
the driver falls back to setting both upper-dot-indicators and lower-dot-indicators.
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List of indicator indices for the upper dot at each inter-digit gap.
Length must be columns - 1. Use 0xFF for gaps with no upper dot.
Used as fallback for ':' (together with lower-dot-indicators) when col-indicators
is absent or 0xFF at a gap.
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List of indicator indices for the lower dot at each inter-digit gap.
Length must be columns - 1. Use 0xFF for gaps with no lower dot.
Used for '.' character and as fallback for ':' together with upper-dot-indicators.
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Number of text columns that the display has
This property is required. |
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Number of text rows that the display has
This property is required. |
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 “slcd-panel” compatible.
Name |
Type |
Details |
|---|---|---|
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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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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.
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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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.
See Important properties for more information. |
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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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Indicates that the device is capable of coherent DMA operations.
For details, see "2.3.10 dma-coherent" 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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