dt-bindings: serial: qcom,msm-uartdm: convert to dtschema

Convert the Qualcomm MSM Serial UARTDM bindings to DT Schema.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220405063451.12011-8-krzysztof.kozlowski@linaro.org

Documentation/devicetree/bindings/serial/qcom,msm-uartdm.txt

-* MSM Serial UARTDM
-
-The MSM serial UARTDM hardware is designed for high-speed use cases where the
-transmit and/or receive channels can be offloaded to a dma-engine. From a
-software perspective it's mostly compatible with the MSM serial UART except
-that it supports reading and writing multiple characters at a time.
-
-Required properties:
-- compatible: Should contain at least "qcom,msm-uartdm".
-              A more specific property should be specified as follows depending
-	      on the version:
-		"qcom,msm-uartdm-v1.1"
-		"qcom,msm-uartdm-v1.2"
-		"qcom,msm-uartdm-v1.3"
-		"qcom,msm-uartdm-v1.4"
-- reg: Should contain UART register locations and lengths. The first
-       register shall specify the main control registers. An optional second
-       register location shall specify the GSBI control region.
-       "qcom,msm-uartdm-v1.3" is the only compatible value that might
-       need the GSBI control region.
-- interrupts: Should contain UART interrupt.
-- clocks: Should contain the core clock and the AHB clock.
-- clock-names: Should be "core" for the core clock and "iface" for the
-	       AHB clock.
-
-Optional properties:
-- dmas: Should contain dma specifiers for transmit and receive channels
-- dma-names: Should contain "tx" for transmit and "rx" for receive channels
-- qcom,tx-crci: Identificator <u32> for Client Rate Control Interface to be
-           used with TX DMA channel. Required when using DMA for transmission
-           with UARTDM v1.3 and below.
-- qcom,rx-crci: Identificator <u32> for Client Rate Control Interface to be
-           used with RX DMA channel. Required when using DMA for reception
-           with UARTDM v1.3 and below.
-
-Note: Aliases may be defined to ensure the correct ordering of the UARTs.
-The alias serialN will result in the UART being assigned port N.  If any
-serialN alias exists, then an alias must exist for each enabled UART.  The
-serialN aliases should be in a .dts file instead of in a .dtsi file.
-
-Examples:
-
-- A uartdm v1.4 device with dma capabilities.
-
-	serial@f991e000 {
-		compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
-		reg = <0xf991e000 0x1000>;
-		interrupts = <0 108 0x0>;
-		clocks = <&blsp1_uart2_apps_cxc>, <&blsp1_ahb_cxc>;
-		clock-names = "core", "iface";
-		dmas = <&dma0 0>, <&dma0 1>;
-		dma-names = "tx", "rx";
-	};
-
-- A uartdm v1.3 device without dma capabilities and part of a GSBI complex.
-
-	serial@19c40000 {
-		compatible = "qcom,msm-uartdm-v1.3", "qcom,msm-uartdm";
-		reg = <0x19c40000 0x1000>,
-		<0x19c00000 0x1000>;
-		interrupts = <0 195 0x0>;
-		clocks = <&gsbi5_uart_cxc>, <&gsbi5_ahb_cxc>;
-		clock-names = "core", "iface";
-	};
-
-- serialN alias.
-
-	aliases {
-		serial0 = &uarta;
-		serial1 = &uartc;
-		serial2 = &uartb;
-	};
-
-	uarta: serial@12490000 {
-	};
-
-	uartb: serial@16340000 {
-	};
-
-	uartc: serial@1a240000 {
-	};

Documentation/devicetree/bindings/serial/qcom,msm-uartdm.yaml

+# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serial/qcom,msm-uartdm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm MSM Serial UARTDM
+
+maintainers:
+  - Andy Gross <agross@kernel.org>
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+  - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
+
+description: |
+  The MSM serial UARTDM hardware is designed for high-speed use cases where the
+  transmit and/or receive channels can be offloaded to a dma-engine. From a
+  software perspective it's mostly compatible with the MSM serial UART except
+  that it supports reading and writing multiple characters at a time.
+
+  Note:: Aliases may be defined to ensure the correct ordering of the UARTs.
+  The alias serialN will result in the UART being assigned port N.  If any
+  serialN alias exists, then an alias must exist for each enabled UART.  The
+  serialN aliases should be in a .dts file instead of in a .dtsi file.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - qcom,msm-uartdm-v1.1
+          - qcom,msm-uartdm-v1.2
+          - qcom,msm-uartdm-v1.3
+          - qcom,msm-uartdm-v1.4
+      - const: qcom,msm-uartdm
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: core
+      - const: iface
+
+  dmas:
+    maxItems: 2
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+  interrupts:
+    maxItems: 1
+
+  qcom,rx-crci:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Identificator for Client Rate Control Interface to be used with RX DMA
+      channel. Required when using DMA for reception with UARTDM v1.3 and
+      below.
+
+  qcom,tx-crci:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Identificator for Client Rate Control Interface to be used with TX DMA
+      channel. Required when using DMA for transmission with UARTDM v1.3 and
+      below.
+
+  reg:
+    minItems: 1
+    items:
+      - description: Main control registers
+      - description: An optional second register location shall specify the GSBI control region.
+
+required:
+  - compatible
+  - clock-names
+  - clocks
+  - interrupts
+  - reg
+
+unevaluatedProperties: false
+
+allOf:
+  - $ref: /schemas/serial/serial.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,msm-uartdm-v1.3
+    then:
+      properties:
+        reg:
+          minItems: 2
+    else:
+      properties:
+        reg:
+          maxItems: 1
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    serial@f991e000 {
+        compatible = "qcom,msm-uartdm-v1.4", "qcom,msm-uartdm";
+        reg = <0xf991e000 0x1000>;
+        interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&blsp1_uart2_apps_cxc>, <&blsp1_ahb_cxc>;
+        clock-names = "core", "iface";
+        dmas = <&dma0 0>, <&dma0 1>;
+        dma-names = "tx", "rx";
+    };