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doc: releases: migration-guide-3.7: add note for UC81xx displays

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Add note for UC81xx displays, which have been migrated to the MIPI DBI
API. This note describes how to define the MIPI DBI wrapper device
needed for the UC81xx display

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
This commit is contained in:
Daniel DeGrasse 2024-06-05 14:58:10 -05:00 committed by Alberto Escolar
parent 7714f8f87b
commit 2c7cd3dc1e
1 changed files with 39 additions and 0 deletions
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39
doc/releases/migration-guide-3.7.rst
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@ -355,6 +355,45 @@ Display
};
};
* UC81XX based displays now use the MIPI DBI driver class. These displays must
now be declared within a MIPI DBI driver wrapper device, which will manage
interfacing with the display. (:github:`73812`) Note that the ``dc-gpios``
pin has changed polarity with this update, for an example, see below:
.. code-block:: devicetree
/* Legacy UC81XX display definition */
&spi0 {
uc8179: uc8179@0 {
compatible = "ultrachip,uc8179";
reg = <0>;
spi-max-frequency = <4000000>;
reset-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
dc-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
...
};
};
/* New display definition with MIPI DBI device */
#include <zephyr/dt-bindings/mipi_dbi/mipi_dbi.h>
...
mipi_dbi {
compatible = "zephyr,mipi-dbi-spi";
reset-gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
dc-gpios = <&gpio0 12 GPIO_ACTIVE_HIGH>;
spi-dev = <&spi0>;
#address-cells = <1>;
#size-cells = <0>;
uc8179: uc8179@0 {
compatible = "ultrachip,uc8179";
reg = <0>;
mipi-max-frequency = <4000000>;
...
};
};
* ST7789V based displays now use the MIPI DBI driver class. These displays
must now be declared within a MIPI DBI driver wrapper device, which will