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[v3,2/6] dt-bindings: display: st7789v: bound the number of Rx data lines

Message ID 20230619155958.3119181-3-miquel.raynal@bootlin.com
State New
Headers show
Series drm/panel: sitronix-st7789v: Support ET028013DMA panel | expand

Commit Message

Miquel Raynal June 19, 2023, 3:59 p.m. UTC 
The ST7789V LCD controller supports regular SPI wiring, as well as no Rx
data line at all. The operating system needs to know whether it can read
registers from the device or not. Let's detail this specific design
possibility by bounding the spi-rx-bus-width property.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
 .../devicetree/bindings/display/panel/sitronix,st7789v.yaml   | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
index 0ccf0487fd8e..a25df7e1df88 100644
--- a/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
+++ b/Documentation/devicetree/bindings/display/panel/sitronix,st7789v.yaml
@@ -29,6 +29,10 @@  properties:
   spi-cpha: true
   spi-cpol: true
 
+  spi-rx-bus-width:
+    minimum: 0
+    maximum: 1
+
 required:
   - compatible
   - reg