dt-bindings: mmc: convert amlogic,meson-gx.txt to dt-schema

Convert the Amlogic SD / eMMC controller for S905/GXBB family SoCs
to dt-schema.

Take in account the used variant with amlogic,meson-gx-mmc.
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221117-b4-amlogic-bindings-convert-v3-6-e28dd31e3bed@linaro.orgSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/amlogic,meson-gx-mmc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic SD / eMMC controller for S905/GXBB family SoCs
+
+description:
+  The MMC 5.1 compliant host controller on Amlogic provides the
+  interface for SD, eMMC and SDIO devices
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@linaro.org>
+
+allOf:
+  - $ref: mmc-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: amlogic,meson-axg-mmc
+      - items:
+          - const: amlogic,meson-gx-mmc
+          - const: amlogic,meson-gxbb-mmc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 3
+
+  clock-names:
+    items:
+      - const: core
+      - const: clkin0
+      - const: clkin1
+
+  resets:
+    maxItems: 1
+
+  amlogic,dram-access-quirk:
+    type: boolean
+    description:
+      set when controller's internal DMA engine cannot access the DRAM memory,
+      like on the G12A dedicated SDIO controller.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - resets
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    mmc@70000 {
+        compatible = "amlogic,meson-gx-mmc", "amlogic,meson-gxbb-mmc";
+        reg = <0x70000 0x2000>;
+        interrupts = <GIC_SPI 216 IRQ_TYPE_EDGE_RISING>;
+        clocks = <&clk_mmc>, <&xtal>, <&clk_div>;
+        clock-names = "core", "clkin0", "clkin1";
+        pinctrl-0 = <&emm_pins>;
+        resets = <&reset_mmc>;
+    };

Documentation/devicetree/bindings/mmc/amlogic,meson-gx.txt

-Amlogic SD / eMMC controller for S905/GXBB family SoCs
-
-The MMC 5.1 compliant host controller on Amlogic provides the
-interface for SD, eMMC and SDIO devices.
-
-This file documents the properties in addition to those available in
-the MMC core bindings, documented by mmc.txt.
-
-Required properties:
-- compatible : contains one of:
-  - "amlogic,meson-gx-mmc"
-  - "amlogic,meson-gxbb-mmc"
-  - "amlogic,meson-gxl-mmc"
-  - "amlogic,meson-gxm-mmc"
-  - "amlogic,meson-axg-mmc"
-- clocks     : A list of phandle + clock-specifier pairs for the clocks listed in clock-names.
-- clock-names: Should contain the following:
-	"core" - Main peripheral bus clock
-	"clkin0" - Parent clock of internal mux
-	"clkin1" - Other parent clock of internal mux
-  The driver has an internal mux clock which switches between clkin0 and clkin1 depending on the
-  clock rate requested by the MMC core.
-- resets     : phandle of the internal reset line
-
-Optional properties:
-- amlogic,dram-access-quirk: set when controller's internal DMA engine cannot access the
-  DRAM memory, like on the G12A dedicated SDIO controller.
-
-Example:
-
-	sd_emmc_a: mmc@70000 {
-		compatible = "amlogic,meson-gxbb-mmc";
-		reg = <0x0 0x70000 0x0 0x2000>;
-		interrupts = < GIC_SPI 216 IRQ_TYPE_EDGE_RISING>;
-		clocks = <&clkc CLKID_SD_EMMC_A>, <&xtal>, <&clkc CLKID_FCLK_DIV2>;
-		clock-names = "core", "clkin0", "clkin1";
-		pinctrl-0 = <&emmc_pins>;
-		resets = <&reset RESET_SD_EMMC_A>;
-	};