[PATCH v4 2/2] devicetree: bindings SPI Add bindings doc for Sunplus SP7021

[Li-hao Kuo <lhjeff911@xxxxxxxxx>]

From: "Li-hao Kuo" <lhjeff911@xxxxxxxxx>

Add devicetree bindings SPI Add bindings doc for Sunplus SP7021

Signed-off-by: Li-hao Kuo <lhjeff911@xxxxxxxxx>
---
Changes in v4:
 - Addressed all comments from Mr. Philipp Zabel
 - Addressed all comments from Mr. Rob Herring
 - Addressed all comments from Mr. Andy Shevchenko
 
 .../bindings/spi/spi-sunplus-sp7021.yaml           | 81 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml

diff --git a/Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml b/Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
new file mode 100644
index 0000000..096bfae
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (C) Sunplus Co., Ltd. 2021
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/spi-sunplus-sp7021.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sunplus sp7021 SPI controller
+
+allOf:
+  - $ref: "spi-controller.yaml"
+
+maintainers:
+  - Li-hao Kuo <lhjeff911@xxxxxxxxx>
+
+properties:
+  compatible:
+    enum:
+      - sunplus,sp7021-spi
+
+  reg:
+    items:
+      - the SPI master registers
+      - the SPI slave registers
+
+  reg-names:
+    items:
+      - const: master
+      - const: slave
+
+  interrupt-names:
+    items:
+      - const: dma_w
+      - const: mas_risc
+      - const: slave_risc
+
+  interrupts:
+    minItems: 3
+
+  clocks:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - interrupts
+  - interrupt-names
+  - clocks
+  - clocks-names
+  - resets
+  - pinctrl-names
+  - pinctrl-0
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/sp-sp7021.h>
+    #include <dt-bindings/reset/sp-sp7021.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    spi@9C002D80 {
+        compatible = "sunplus,sp7021-spi";
+        reg = <0x9C002D80 0x80>, <0x9C002E00 0x80>;
+        reg-names = "master", "slave";
+        interrupt-parent = <&intc>;
+        interrupt-names = "dma_w",
+                          "mas_risc",
+                          "slave_risc";
+        interrupts = <144 IRQ_TYPE_LEVEL_HIGH>,
+                     <146 IRQ_TYPE_LEVEL_HIGH>,
+                     <145 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clkc SPI_COMBO_0>;
+        resets = <&rstc RST_SPI_COMBO_0>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&pins_spi0>;
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 91f5707..ee428d8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18237,6 +18237,7 @@ SUNPLUS SPI CONTROLLER INTERFACE DRIVER
 M:	Li-hao Kuo <lhjeff911@xxxxxxxxx>
 L:	linux-spi@xxxxxxxxxxxxxxx
 S:	Maintained
+F:	Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
 F:	drivers/spi/spi-sunplus-sp7021.c
 
 SUPERH
-- 
2.7.4