drm/fsl-dcu: add TCON driver

Add driver for the TCON (timing controller) module. The TCON module
is a separate module attached after the DCU (display controller
unit). Each DCU instance has its own, directly connected TCON
instance. The DCU's RGB and timing signals are passing through
the TCON module. TCON can provide timing signals for raw TFT panels
or operate in a bypass mode which leaves all signals unaltered.

The driver currently only supports the bypass mode.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stefan Agner <stefan@agner.ch>

1 files changed, 18 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/display/fsl,tcon.txt b/Documentation/devicetree/bindings/display/fsl,tcon.txt
new file mode 100644
index 000000000000..6fa4ab668db5
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/fsl,tcon.txt
@@ -0,0 +1,18 @@
+Device Tree bindings for Freescale TCON Driver
+
+Required properties:
+- compatible:		Should be one of
+	* "fsl,vf610-tcon".
+
+- reg:			Address and length of the register set for tcon.
+- clocks:		From common clock binding: handle to tcon ipg clock.
+- clock-names:		From common clock binding: Shall be "ipg".
+
+Examples:
+timing-controller@4003d000 {
+	compatible = "fsl,vf610-tcon";
+	reg = <0x4003d000 0x1000>;
+	clocks = <&clks VF610_CLK_TCON0>;
+	clock-names = "ipg";
+	status = "okay";
+};