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

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

Add devicetree bindings SPI Add bindings doc for Sunplus SP7021

Signed-off-by: LH.Kuo <lh.kuo@sunplus.com>
---
 - Addressed all comments from Mr. Mark Brown
 - Addressed all comments from Mr. Philipp Zabel
 - Modified the structure and register access method.

 .../bindings/spi/spi-sunplus-sp7021.yaml           | 95 ++++++++++++++++++++++
 MAINTAINERS                                        |  1 +
 2 files changed, 96 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..5502f15
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
@@ -0,0 +1,95 @@
+# 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:
+  - lh.kuo <lh.kuo@sunplus.com>
+
+properties:
+  compatible:
+    enum:
+      - sunplus,sp7021-spi-controller
+
+  reg:
+    items:
+      - description: Base address and length of the SPI master registers
+      - description: Base address and length of the SPI slave registers
+
+  reg-names:
+    items:
+      - const: spi_master
+      - const: spi_slave
+
+  interrupt-names:
+    items:
+      - const: dma_w_intr
+      - const: mas_risc_intr
+      - const: slave_risc_intr
+
+  interrupts:
+    minItems: 3
+
+  clocks:
+    maxItems: 1
+
+  clocks-names:
+    items:
+      - const: sys_pll
+
+  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.
+
+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-controller";
+        reg = <0x9C002D80 0x80>, <0x9C002E00 0x80>;
+        reg-names = "spi_master", "spi_slave";
+        interrupt-parent = <&intc>;
+        interrupt-names = "dma_w_intr",
+                          "mas_risc_intr",
+                          "slave_risc_intr";
+        interrupts = <144 IRQ_TYPE_LEVEL_HIGH>,
+                     <146 IRQ_TYPE_LEVEL_HIGH>,
+                     <145 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clkc SPI_COMBO_0>;
+        clocks-names = "sys_pll";
+        resets = <&rstc RST_SPI_COMBO_0>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&pins_spi0>;
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 34868d0..ef416a2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18193,6 +18193,7 @@ SUNPLUS SPI CONTROLLER INTERFACE DRIVER
 M:	LH Kuo <lh.kuo@sunplus.com>
 L:	linux-spi@vger.kernel.org
 S:	Maintained
+F:	Documentation/devicetree/bindings/spi/spi-sunplus-sp7021.yaml
 F:	drivers/spi/spi-sunplus-sp7021.c
 
 SUPERH
-- 
2.7.4