hit,hd44780
Vendor: Hitachi Ltd.
Note
An implementation of a driver matching this compatible is available in drivers/auxdisplay/auxdisplay_hd44780.c.
Description
Hitachi HD44780 LCD
Properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Operating mode of display, 8-bit or 4 for 4-bit mode
This property is required. Legal values: |
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GPIO connected to Register Select (RS) of LCD
This property is required. |
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Optional GPIO used for selecting read or write mode
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GPIO used for enabling commands to be sent
This property is required. |
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Array of GPIOs connected to the DB lines of the display, this must
contain 8 entries ascending from DB0 to DB7, for 4-bit interface
displays, the first 4 must be set as `<0>`
This property is required. |
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Optional GPIO used for controlling the brightness (contrast)
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Optional GPIO used for enabling the backlight
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Array of addresses for each row, will use defaults if not provided.
Default is as per Hitachi HD44780 specification.
Default value: |
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Delay time (in us) to wait after enable line rises before setting low.
Default is as per Hitachi HD44780 specification.
Default value: |
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Delay time (in us) to wait after enable line falls before sending
another command. Default is as per Hitachi HD44780 specification.
Default value: |
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Delay time (in us) to wait after issuing a clear command before sending
another command. Default is as per Hitachi HD44780 specification.
Default value: |
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Delay time (in ms) to wait at boot time before sending a command (note:
this will delay startup of the whole application by this time, this
should only be used when time is needed for the display device to be
ready before it can be configured which without any delay would cause
the display to not function properly).
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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 “hit,hd44780” 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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