dt-bindings: memory-controllers: add StarFive JH7110 SoC DMC

Describe JH7110 SoC DDR external memory interface.

Signed-off-by: E Shattow <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Emil Renner Berthing <[e-mail]>
Signed-off-by: Conor Dooley <[e-mail]>

Documentation/devicetree/bindings/memory-controllers/starfive,jh7110-dmc.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/memory-controllers/starfive,jh7110-dmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: StarFive JH7110 DMC
+
+maintainers:
+  - E Shattow <[e-mail]>
+
+description:
+  JH7110 DDR external memory interface LPDDR4/DDR4/DDR3/LPDDR3 32-bit at
+  2133Mbps (up to 2800Mbps).
+
+properties:
+  compatible:
+    items:
+      - const: starfive,jh7110-dmc
+
+  reg:
+    items:
+      - description: controller registers
+      - description: phy registers
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: pll
+
+  resets:
+    items:
+      - description: axi
+      - description: osc
+      - description: apb
+
+  reset-names:
+    items:
+      - const: axi
+      - const: osc
+      - const: apb
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/starfive,jh7110-crg.h>
+    #include <dt-bindings/reset/starfive,jh7110-crg.h>
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      memory-controller@15700000 {
+        compatible = "starfive,jh7110-dmc";
+        reg = <0x0 0x15700000 0x0 0x10000>,
+              <0x0 0x13000000 0x0 0x10000>;
+        clocks = <&syscrg JH7110_PLLCLK_PLL1_OUT>;
+        clock-names = "pll";
+        resets = <&syscrg JH7110_SYSRST_DDR_AXI>,
+                 <&syscrg JH7110_SYSRST_DDR_OSC>,
+                 <&syscrg JH7110_SYSRST_DDR_APB>;
+        reset-names = "axi", "osc", "apb";
+      };
+    };