Add mux-controller dt node as a child node of scm_conf. This is
required for muxing SERDES between USB, PCIe and ICSS2 SGMII. While
at that also add "simple-mfd" compatible string to scm_conf dt node
so that mux-controller device gets created.

Signed-off-by: Kishon Vijay Abraham I <[email protected]>
---
 arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi 
b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
index 957c9125a453..4379c370f6f8 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
@@ -7,8 +7,15 @@
 
 &cbass_main {
        scm_conf: scm_conf@100000 {
-               compatible = "syscon";
+               compatible = "syscon", "simple-mfd";
                reg = <0 0x00100000 0 0x1c000>;
+
+               serdes_mux: mux-controller {
+                       compatible = "mmio-mux";
+                       #mux-control-cells = <1>;
+                       mux-reg-masks = <0x4080 0x3>, /* SERDES0 lane select */
+                                       <0x4090 0x3>; /* SERDES1 lane select */
+               };
        };
 
        gic500: interrupt-controller@1800000 {
-- 
2.17.1

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