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doc: drivers: mipi-dbi: detail write-only and duplex options

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Add clarifications to mipi-dbi bindings to avoid the confusion
between two options, write-only and duplex.

Signed-off-by: Eve Redero <eve.redero@gmail.com>
This commit is contained in:
Eve Redero 2024-02-08 19:08:13 +01:00 committed by Maureen Helm
parent 6b1b8157cd
commit f0ea359858
2 changed files with 7 additions and 2 deletions
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2
dts/bindings/mipi-dbi/mipi-dbi-spi-device.yaml
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@ -12,6 +12,8 @@ properties:
description: |
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

7
dts/bindings/mipi-dbi/zephyr,mipi-dbi-spi.yaml
View file

@ -30,5 +30,8 @@ properties:
write-only:
type: boolean
description: |
Controller is not readable, IE only DOUT pin is connected on the SPI
interface.
Only writes to display controller, do not perform reads.
If all controllers are write-only, read functions will be
optimized out for size.
It can also be used as an alternative to half duplex when
only one data line is connected.