Add the DU device with a disabled state. Boards that want to enable the
DU need to specify the output topology

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
---
 arch/arm/boot/dts/r8a7791.dtsi | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
index 8a07505..d5f9ae06 100644
--- a/arch/arm/boot/dts/r8a7791.dtsi
+++ b/arch/arm/boot/dts/r8a7791.dtsi
@@ -637,6 +637,36 @@
                status = "disabled";
        };

+       du: du at feb00000 {
+               compatible = "renesas,du-r8a7791";
+               reg = <0 0xfeb00000 0 0x40000>,
+                     <0 0xfeb90000 0 0x1c>;
+               reg-names = "du", "lvds.0";
+               interrupts = <0 256 IRQ_TYPE_LEVEL_HIGH>,
+                            <0 268 IRQ_TYPE_LEVEL_HIGH>;
+               clocks = <&mstp7_clks R8A7791_CLK_DU0>,
+                        <&mstp7_clks R8A7791_CLK_DU1>,
+                        <&mstp7_clks R8A7791_CLK_LVDS0>;
+               clock-names = "du.0", "du.1", "lvds.0";
+               status = "disabled";
+
+               ports {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       port at 0 {
+                               reg = <0>;
+                               du_out_rgb: endpoint {
+                               };
+                       };
+                       port at 1 {
+                               reg = <1>;
+                               du_out_lvds0: endpoint {
+                               };
+                       };
+               };
+       };
+
        clocks {
                #address-cells = <2>;
                #size-cells = <2>;
-- 
1.8.5.5

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