[PATCH v2 2/2] devicetree bindings mmc Add bindings doc for Sunplus SP7021

["LH.Kuo" <lhjeff911@gmail.com>]

Add devicetree bindings mmc Add bindings doc for Sunplus SP7021

Signed-off-by: LH.Kuo <lh.kuo@sunplus.com>
---
Changes in v2:
 - Addressed all comments from Mr. Philipp Zabel
 - Modified the structure and register access method.
 - Modifiedthe path about MAINTAINERS. ( wrong messages PATH in v1).

 .../devicetree/bindings/mmc/sunplus-sd2.yaml       | 82 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 83 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml

diff --git a/Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml b/Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml
new file mode 100644
index 0000000..95dc0bb
--- /dev/null
+++ b/Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (C) Sunplus Co., Ltd. 2021
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/sunplus-sd2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sunplus SD/SDIO controller
+
+maintainers:
+  - lh.kuo <lh.kuo@sunplus.com>
+
+properties:
+  compatible:
+    enum:
+      - sunplus,sp7021-card1
+      - sunplus,sp7021-sdio
+
+  reg:
+    items:
+      - description: Base address and length of the SD/SDIO registers
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  pinctrl-names:
+    description:
+      A pinctrl state named "default" must be defined.
+    const: default
+
+  pinctrl-0:
+    description:
+      A phandle to the default pinctrl state.
+
+  max-frequency: true
+
+allOf:
+  - $ref: "mmc-controller.yaml"
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - resets
+  - pinctrl-names
+  - pinctrl-0
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sp-sp7021.h>
+    #include <dt-bindings/reset/sp-sp7021.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    mmc1: mmc@9C003e80 {
+       compatible = "sunplus,sp7021-card1";
+       reg = <0x9c003e80 0x280>;
+       interrupts = <21 IRQ_TYPE_LEVEL_HIGH>;
+       clocks = <&clkc CARD_CTL1>;
+       resets = <&rstc RST_CARD_CTL1>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&mmc1_mux &mmc1_mux_cd>;
+       max-frequency = <52000000>;
+    };
+    sdio: mmc@9C008400 {
+       compatible = "sunplus,sp7021-sdio";
+       reg = <0x9c008400 0x280>;
+       interrupts = <21 IRQ_TYPE_LEVEL_HIGH>;
+       clocks = <&clkc CARD_CTL1>;
+       resets = <&rstc RST_CARD_CTL1>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&pins_sdio>;
+       max-frequency = <52000000>;
+    };   
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 2746084..e653a1d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18193,6 +18193,7 @@ SUNPLUS SD/SDIO HOST CONTROLLER INTERFACE DRIVER
 M:	LH Kuo <lh.kuo@sunplus.com>
 L:	linux-mmc@vger.kernel.org
 S:	Maintained
+F:	Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml
 F:	drivers/mmc/host/sunplus_sd2.*
 
 SUPERH
-- 
2.7.4