From: Nevo Hed <nhed+git...@starry.com>

Based on upstream-linux
See https://github.com/torvalds/linux/commit/f66b2aff.

However made the XSMI register window 0x16 (22) bytes per my reading
of the functional spec.  Similar commits in Marvels own repo bump it
to 0x200 (512) bytes but I did not see the reasoning for that.

https://github.com/MarvellEmbeddedProcessors/u-boot-marvell/commit/4d932b4.

Also added device-name attributes to prevent ambiguity in the `mdio`
command.

Signed-off-by: Nevo Hed <nhed+git...@starry.com>
---

 arch/arm/dts/armada-cp110-master.dtsi | 9 +++++++++
 arch/arm/dts/armada-cp110-slave.dtsi  | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/arch/arm/dts/armada-cp110-master.dtsi 
b/arch/arm/dts/armada-cp110-master.dtsi
index e4c17e9f4b..cd5c974482 100644
--- a/arch/arm/dts/armada-cp110-master.dtsi
+++ b/arch/arm/dts/armada-cp110-master.dtsi
@@ -99,6 +99,15 @@
                                device-name = "cpm-mdio";
                        };
 
+                       cpm_xmdio: mdio@12a600 {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+                               compatible = "marvell,xmdio";
+                               reg = <0x12a600 0x16>;
+                               status = "disabled";
+                               device-name = "cpm-xmdio";
+                       };
+
                        cpm_syscon0: system-controller@440000 {
                                compatible = "marvell,cp110-system-controller0",
                                             "syscon";
diff --git a/arch/arm/dts/armada-cp110-slave.dtsi 
b/arch/arm/dts/armada-cp110-slave.dtsi
index 2fbd7b5514..b426a4eb69 100644
--- a/arch/arm/dts/armada-cp110-slave.dtsi
+++ b/arch/arm/dts/armada-cp110-slave.dtsi
@@ -99,6 +99,15 @@
                                device-name = "cps-mdio";
                        };
 
+                       cps_xmdio: mdio@12a600 {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+                               compatible = "marvell,xmdio";
+                               reg = <0x12a600 0x16>;
+                               status = "disabled";
+                               device-name = "cps-xmdio";
+                       };
+
                        cps_syscon0: system-controller@440000 {
                                compatible = "marvell,cp110-system-controller0",
                                             "syscon";
-- 
2.21.0

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