Convert atmel,hsmci documentation to yaml format. The new file will inherit
from mmc-controller.yaml.

Signed-off-by: Dharma Balasubiramani <dharma.b@microchip.com>
---
 .../devicetree/bindings/mmc/atmel,hsmci.yaml       | 106 +++++++++++++++++++++
 .../devicetree/bindings/mmc/atmel-hsmci.txt        |  73 --------------
 2 files changed, 106 insertions(+), 73 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/atmel,hsmci.yaml b/Documentation/devicetree/bindings/mmc/atmel,hsmci.yaml
new file mode 100644
index 000000000000..feaa98e44955
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/atmel,hsmci.yaml

@@ -0,0 +1,106 @@
+# 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:
+  - $ref: mmc-controller.yaml
+
+properties:
+  compatible:
+    const: atmel,hsmci
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    const: rxtx
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: mci_clk
+
+  "#address-cells":
+    const: 1
+    description: Used for slot IDs.
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^slot@[0-9]+$":