[PATCH 1/2] dt-bindings: display: exynos: dsim: Add 'lane-polarities'

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <festevam@denx.de>

The Samsung DSIM IP block allows the inversion of the clock and
data lanes.

Add an optional property called 'lane-polarities' that describes the
polarities of the MIPI DSI clock and data lanes.

This is property is useful for properly describing the hardware
when the board designer decided to switch the polarities of the MIPI DSI
clock and/or data lanes.

Signed-off-by: Fabio Estevam <festevam@denx.de>
---
 .../devicetree/bindings/display/exynos/exynos_dsim.txt      | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/exynos/exynos_dsim.txt b/Documentation/devicetree/bindings/display/exynos/exynos_dsim.txt
index 2a5f0889ec32..65ed8ef7aed7 100644
--- a/Documentation/devicetree/bindings/display/exynos/exynos_dsim.txt
+++ b/Documentation/devicetree/bindings/display/exynos/exynos_dsim.txt
@@ -29,6 +29,12 @@ Required properties:
 
 Optional properties:
   - power-domains: a phandle to DSIM power domain node
+  - lane-polarities: Array that describes the polarities of the clock and data lanes.
+    1: inverted polarity
+    0: normal polarity
+    The first entry corresponds to the clock lanes. Subsequent entries correspond to the data lanes.
+    Example of a 4-lane system with only the clock lanes inverted:
+    lane-polarities = <1 0 0 0 0>;
 
 Child nodes:
   Should contain DSI peripheral nodes (see MIPI DSI bindings [1]).
-- 
2.34.1