[RFC v4 1/8] dt-bindings: rockchip-sfc: Bindings for Rockchip serial flash controller

[Chris Morgan <macroalpha82@xxxxxxxxx>]

From: Chris Morgan <macromorgan@xxxxxxxxxxx>

Add bindings for the Rockchip serial flash controller. New device
specific parameter of rockchip,sfc-no-dma included in documentation.

Signed-off-by: Chris Morgan <macromorgan@xxxxxxxxxxx>
---
 .../devicetree/bindings/spi/rockchip-sfc.yaml | 85 +++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/rockchip-sfc.yaml

diff --git a/Documentation/devicetree/bindings/spi/rockchip-sfc.yaml b/Documentation/devicetree/bindings/spi/rockchip-sfc.yaml
new file mode 100644
index 000000000000..05728de52921
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/rockchip-sfc.yaml
@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/rockchip-sfc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rockchip Serial Flash Controller (SFC)
+
+maintainers:
+  - Heiko Stuebner <heiko@xxxxxxxxx>
+  - Chris Morgan <macromorgan@xxxxxxxxxxx>
+
+allOf:
+  - $ref: spi-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - rockchip,px30-sfc
+              - rockchip,rk3308-sfc
+              - rockchip,rv1108-sfc
+          - const: rockchip,rk3036-sfc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Bus Clock
+      - description: Module Clock
+
+  clock-names:
+    items:
+      - const: ahb
+      - const: sfc
+
+  power-domains:
+    maxItems: 1
+
+  rockchip,sfc-no-dma:
+    description: Disable DMA and utilize FIFO mode only
+    type: boolean
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/px30-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/px30-power.h>
+
+    sfc: spi@ff3a0000 {
+        compatible = "rockchip,px30-sfc","rockchip,rk3036-sfc";
+        reg = <0xff3a0000 0x4000>;
+        interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&cru HCLK_SFC>, <&cru SCLK_SFC>;
+        clock-names = "ahb", "sfc";
+        pinctrl-0 = <&sfc_clk &sfc_cs &sfc_bus2>;
+        pinctrl-names = "default";
+        power-domains = <&power PX30_PD_MMC_NAND>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        flash@0 {
+            compatible = "jedec,spi-nor";
+            reg = <0>;
+            spi-max-frequency = <108000000>;
+            spi-rx-bus-width = <2>;
+            spi-tx-bus-width = <2>;
+        };
+    };
+
+...
-- 
2.25.1