sitronix,st7796s (on mipi-dbi bus)
Vendor: Sitronix Technology Corporation
Note
An implementation of a driver matching this compatible is available in drivers/display/display_st7796s.c.
Description
ST7796S Display controller
Properties
Node specific properties
Properties not inherited from the base binding file.
Name |
Type |
Details |
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Frame rate control (partial mode / full colors). The default value should
result in a framerate of ~41 FPS.
Default value: |
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Frame rate control (idle mode / 8 colors). This property sets the
division ratio for internal clocks in idle mode
Default value: |
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Frame rate control (partial mode / full colors). This property sets the
division ratio for internal clocks in partial mode
Default value: |
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Blanking porch control. This sets the vertical and horizontal
front/back porch values
Default value: |
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Display function control. Sets display graphical ram mode, as well as
gate scan mode
Default value: |
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Power control parameter 1. Sets AVDDS, AVLCS, and VGHS
Default value: |
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Power control parameter 2. Sets VAP
Default value: |
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Power control parameter 3. Sets source and gamma current levels
Default value: |
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VCOM control setting. Value starts at 0.300V, and moves upwards in
increments of 0.025V. Maximum of 1.875V
Default value: |
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Display output control adjust. Sets display timing controls
Default value: |
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Positive gamma control settings. No default is provided by controller,
as this setting is panel specific.
This property is required. |
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Negative gamma control settings. No default is provided by controller,
as this setting is panel specific.
This property is required. |
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Memory data access control value. This controls the panel color format,
as well as rotation settings.
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When present, inverts display colors
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Display inversion control mode.
Default value: Legal values: |
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Inverting color format order (RGB->BGR or BGR->RGB)
In the case of enabling this option, API reports pixel-format in capabilities
as the inverted value of the RGB pixel-format specified in MADCTL.
This option is convenient for supporting displays with bugs
where the actual color is different from the pixel format of MADCTL.
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SPI Duplex mode, full or half. By default it's always full duplex thus 0
as this is, by far, the most common mode.
Selecting half duplex allows to use SPI MOSI as a bidirectional line,
typically used when only one data line is connected.
Use the macros, not the actual enum value. Here is the concordance
list (see dt-bindings/spi/spi.h)
0 SPI_FULL_DUPLEX
2048 SPI_HALF_DUPLEX
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SPI clock polarity which indicates the clock idle state.
If it is used, the clock idle state is logic high; otherwise, low.
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SPI clock phase that indicates on which edge data is sampled.
If it is used, data is sampled on the second edge; otherwise, on the first edge.
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In some cases, it is necessary for the master to manage SPI chip select
under software control, so that multiple spi transactions can be performed
without releasing it. A typical use case is variable length SPI packets
where the first spi transaction reads the length and the second spi transaction
reads length bytes.
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Maximum clock frequency of device's MIPI interface in Hz
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MIPI DBI mode in use. Use the macros, not the actual enum value. Here is
the concordance list (see dt-bindings/mipi_dbi/mipi_dbi.h)
1 MIPI_DBI_MODE_SPI_3WIRE
2 MIPI_DBI_MODE_SPI_4WIRE
3 MIPI_DBI_MODE_6800_BUS_16_BIT
4 MIPI_DBI_MODE_6800_BUS_9_BIT
5 MIPI_DBI_MODE_6800_BUS_8_BIT
6 MIPI_DBI_MODE_8080_BUS_16_BIT
7 MIPI_DBI_MODE_8080_BUS_9_BIT
8 MIPI_DBI_MODE_8080_BUS_8_BIT
Legal values: |
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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.
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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.
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Height of the panel driven by the controller, with the units in pixels.
This property is required. |
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Width of the panel driven by the controller, with the units in pixels.
This property is required. |
Deprecated node specific properties
Deprecated properties not inherited from the base binding file.
(None)
Base properties
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 “sitronix,st7796s” 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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