diff --git a/Documentation/devicetree/bindings/mmc/atmel,hsmci.yaml b/Documentation/devicetree/bindings/mmc/atmel,hsmci.yaml
new file mode 100644
index 000000000000..26686ada6288
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/atmel,hsmci.yaml
@@ -0,0 +1,110 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/atmel,hsmci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel High-Speed MultiMedia Card Interface (HSMCI)
+
+description:
+  The Atmel HSMCI controller provides an interface for MMC, SD, and SDIO memory
+  cards.
+
+maintainers:
+  - Nicolas Ferre <nicolas.ferre@microchip.com>
+  - Aubin Constans <aubin.constans@microchip.com>
+
+allOf:
+  - $ref: mmc-controller.yaml
+
+properties:
+  compatible:
+    const: atmel,hsmci
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    const: rxtx
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: mci_clk
+
+  "#address-cells":
+    const: 1
+    description: Used for slot IDs.
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^slot@[0-9]+$":
+    type: object
+    description: A slot node representing an MMC, SD, or SDIO slot.
+
+    allOf:
+      - $ref: mmc-controller.yaml
+
+    properties:
+      reg:
+        description: Slot ID.
+        minimum: 0
+
+    required:
+      - reg
+      - bus-width
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - "#address-cells"
+  - "#size-cells"
+
+anyOf:
+  - required:
+      - slot@0
+  - required:
+      - slot@1
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/at91.h>
+    mmc@f0008000 {
+      compatible = "atmel,hsmci";
+      reg = <0xf0008000 0x600>;
+      interrupts = <12 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&mci0_clk>;
+      clock-names = "mci_clk";
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      slot@0 {
+        reg = <0>;
+        bus-width = <4>;
+        cd-gpios = <&pioD 15 0>;
+        cd-inverted;
+      };
+
+      slot@1 {
+        reg = <1>;
+        bus-width = <4>;
+      };
+    };
+...
diff --git a/Documentation/devicetree/bindings/mmc/atmel-hsmci.txt b/Documentation/devicetree/bindings/mmc/atmel-hsmci.txt
deleted file mode 100644
index 07ad02075a93..000000000000
--- a/Documentation/devicetree/bindings/mmc/atmel-hsmci.txt
+++ /dev/null
@@ -1,73 +0,0 @@
-* Atmel High Speed MultiMedia Card Interface
-
-This controller on atmel products provides an interface for MMC, SD and SDIO
-types of memory cards.
-
-This file documents differences between the core properties described
-by mmc.txt and the properties used by the atmel-mci driver.
-
-1) MCI node
-
-Required properties:
-- compatible: should be "atmel,hsmci"
-- #address-cells: should be one. The cell is the slot id.
-- #size-cells: should be zero.
-- at least one slot node
-- clock-names: tuple listing input clock names.
-	Required elements: "mci_clk"
-- clocks: phandles to input clocks.
-
-The node contains child nodes for each slot that the platform uses
-
-Example MCI node:
-
-mmc0: mmc@f0008000 {
-	compatible = "atmel,hsmci";
-	reg = <0xf0008000 0x600>;
-	interrupts = <12 4>;
-	#address-cells = <1>;
-	#size-cells = <0>;
-	clock-names = "mci_clk";
-	clocks = <&mci0_clk>;
-
-	[ child node definitions...]
-};
-
-2) slot nodes
-
-Required properties:
-- reg: should contain the slot id.
-- bus-width: number of data lines connected to the controller
-
-Optional properties:
-- cd-gpios: specify GPIOs for card detection
-- cd-inverted: invert the value of external card detect gpio line
-- wp-gpios: specify GPIOs for write protection
-
-Example slot node:
-
-slot@0 {
-	reg = <0>;
-	bus-width = <4>;
-	cd-gpios = <&pioD 15 0>
-	cd-inverted;
-};
-
-Example full MCI node:
-mmc0: mmc@f0008000 {
-	compatible = "atmel,hsmci";
-	reg = <0xf0008000 0x600>;
-	interrupts = <12 4>;
-	#address-cells = <1>;
-	#size-cells = <0>;
-	slot@0 {
-		reg = <0>;
-		bus-width = <4>;
-		cd-gpios = <&pioD 15 0>
-		cd-inverted;
-	};
-	slot@1 {
-		reg = <1>;
-		bus-width = <4>;
-	};
-};
