spi: dt-bindings: fsl-dspi: Convert to yaml format

Convert dt-binding spi-fsl-dspi.txt to yaml format.
Use part Vladimir Oltean's work at of
https://lore.kernel.org/linux-spi/[e-mail]/

Additional changes during convert:
- compatible string "fsl,ls1028a-dspi" can be followed by
fsl,ls1021a-v1.0-dspi.
- Change "dspi0@4002c000" to "spi@4002c000" in example.
- Reorder properties in example.
- Use GIC include in example.
- Deprecated fsl,spi-cs-sck-delay and fsl,spi-sck-cs-delay by use common SPI
property.
- Use compatible string 'jedec,spi-nor' in example.
- Split peripheral part to fsl,dspi-peripheral-props.yaml.
- Remove 'interrupts' and 'pinctrl' from required list.
- Update 'bus-num' description.
- Update 'spi-num-chipselects' description by add "cs-gpios don't count
against this number".
- Remove 'big-endian' description.

Co-developed-by: Kuldeep Singh <[e-mail]>
Signed-off-by: Kuldeep Singh <[e-mail]>
Co-developed-by: Vladimir Oltean <[e-mail]>
Signed-off-by: Vladimir Oltean <[e-mail]>
Signed-off-by: Frank Li <[e-mail]>
Reviewed-by: Vladimir Oltean <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/spi/fsl,dspi-peripheral-props.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/fsl,dspi-peripheral-props.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Peripheral-specific properties for Freescale DSPI controller
+
+maintainers:
+  - Vladimir Oltean <[e-mail]>
+
+description:
+  See spi-peripheral-props.yaml for more info.
+
+properties:
+  fsl,spi-cs-sck-delay:
+    deprecated: true
+    description:
+      Delay in nanoseconds between activating chip select and the start of
+      clock signal, at the start of a transfer.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  fsl,spi-sck-cs-delay:
+    deprecated: true
+    description:
+      Delay in nanoseconds between stopping the clock signal and
+      deactivating chip select, at the end of a transfer.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+additionalProperties: true

Documentation/devicetree/bindings/spi/fsl,dspi.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/fsl,dspi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM Freescale DSPI controller
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - fsl,vf610-dspi
+          - fsl,ls1021a-v1.0-dspi
+          - fsl,ls1012a-dspi
+          - fsl,ls1028a-dspi
+          - fsl,ls1043a-dspi
+          - fsl,ls1046a-dspi
+          - fsl,ls1088a-dspi
+          - fsl,ls2080a-dspi
+          - fsl,ls2085a-dspi
+          - fsl,lx2160a-dspi
+      - items:
+          - enum:
+              - fsl,ls1012a-dspi
+              - fsl,ls1028a-dspi
+              - fsl,ls1043a-dspi
+              - fsl,ls1046a-dspi
+              - fsl,ls1088a-dspi
+          - const: fsl,ls1021a-v1.0-dspi
+      - items:
+          - const: fsl,ls2080a-dspi
+          - const: fsl,ls2085a-dspi
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: dspi
+
+  spi-num-chipselects:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      The number of the chip native chipselect signals.
+      cs-gpios don't count against this number.
+
+  big-endian: true
+
+  bus-num:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: SoC-specific identifier for the SPI controller.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - spi-num-chipselects
+
+allOf:
+  - $ref: spi-controller.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/vf610-clock.h>
+
+    spi@4002c000 {
+        compatible = "fsl,vf610-dspi";
+        reg = <0x4002c000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+        interrupts = <GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&clks VF610_CLK_DSPI0>;
+        clock-names = "dspi";
+        spi-num-chipselects = <5>;
+        bus-num = <0>;
+        pinctrl-names = "default";
+        pinctrl-0 = <&pinctrl_dspi0_1>;
+        big-endian;
+
+        flash@0 {
+                compatible = "jedec,spi-nor";
+                reg = <0>;
+                spi-max-frequency = <16000000>;
+                spi-cpol;
+                spi-cpha;
+                spi-cs-setup-delay-ns = <100>;
+                spi-cs-hold-delay-ns = <50>;
+        };
+    };

Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt

···
-ARM Freescale DSPI controller
-
-Required properties:
-- compatible : must be one of:
-	"fsl,vf610-dspi",
-	"fsl,ls1021a-v1.0-dspi",
-	"fsl,ls1012a-dspi" (optionally followed by "fsl,ls1021a-v1.0-dspi"),
-	"fsl,ls1028a-dspi",
-	"fsl,ls1043a-dspi" (optionally followed by "fsl,ls1021a-v1.0-dspi"),
-	"fsl,ls1046a-dspi" (optionally followed by "fsl,ls1021a-v1.0-dspi"),
-	"fsl,ls1088a-dspi" (optionally followed by "fsl,ls1021a-v1.0-dspi"),
-	"fsl,ls2080a-dspi" (optionally followed by "fsl,ls2085a-dspi"),
-	"fsl,ls2085a-dspi",
-	"fsl,lx2160a-dspi",
-- reg : Offset and length of the register set for the device
-- interrupts : Should contain SPI controller interrupt
-- clocks: from common clock binding: handle to dspi clock.
-- clock-names: from common clock binding: Shall be "dspi".
-- pinctrl-0: pin control group to be used for this controller.
-- pinctrl-names: must contain a "default" entry.
-- spi-num-chipselects : the number of the chipselect signals.
-
-Optional property:
-- big-endian: If present the dspi device's registers are implemented
-  in big endian mode.
-- bus-num : the slave chip chipselect signal number.
-
-Optional SPI slave node properties:
-- fsl,spi-cs-sck-delay: a delay in nanoseconds between activating chip
-  select and the start of clock signal, at the start of a transfer.
-- fsl,spi-sck-cs-delay: a delay in nanoseconds between stopping the clock
-  signal and deactivating chip select, at the end of a transfer.
-
-Example:
-
-dspi0@4002c000 {
-	#address-cells = <1>;
-	#size-cells = <0>;
-	compatible = "fsl,vf610-dspi";
-	reg = <0x4002c000 0x1000>;
-	interrupts = <0 67 0x04>;
-	clocks = <&clks VF610_CLK_DSPI0>;
-	clock-names = "dspi";
-	spi-num-chipselects = <5>;
-	bus-num = <0>;
-	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_dspi0_1>;
-	big-endian;
-
-	sflash: at26df081a@0 {
-		#address-cells = <1>;
-		#size-cells = <1>;
-		compatible = "atmel,at26df081a";
-		spi-max-frequency = <16000000>;
-		spi-cpol;
-		spi-cpha;
-		reg = <0>;
-		linux,modalias = "m25p80";
-		modal = "at26df081a";
-		fsl,spi-cs-sck-delay = <100>;
-		fsl,spi-sck-cs-delay = <50>;
-	};
-};
-
-

Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml

···
 allOf:
   - $ref: arm,pl022-peripheral-props.yaml#
   - $ref: cdns,qspi-nor-peripheral-props.yaml#
+  - $ref: fsl,dspi-peripheral-props.yaml#
   - $ref: samsung,spi-peripheral-props.yaml#
   - $ref: nvidia,tegra210-quad-peripheral-props.yaml#
 

MAINTAINERS

···
 M:	Vladimir Oltean <[e-mail]>
 L:	[e-mail]
 S:	Maintained
-F:	Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
+F:	Documentation/devicetree/bindings/spi/fsl,dspi*.yaml
 F:	drivers/spi/spi-fsl-dspi.c
 F:	include/linux/spi/spi-fsl-dspi.h