[PATCH v1 2/8] dt-bindings: display: panel: mipi-dbi-spi: add spi-3wire property

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Some MIPI DBI panels support a three wire mode (clock, chip select,
bidirectional data) that can be used to ask the panel if it is already set
up by e.g. the bootloader and can thus skip the initialization.
This enables a flicker-free boot.

Signed-off-by: Leonard Göhrs <l.goehrs@xxxxxxxxxxxxxx>
---
 .../devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
index c07da1a9e6288..2f0238b770eba 100644
--- a/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
+++ b/Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
@@ -87,6 +87,8 @@ properties:
       Logic level supply for interface signals (Vddi).
       No need to set if this is the same as power-supply.
 
+  spi-3wire: true
+
 required:
   - compatible
   - reg
-- 
2.39.2




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