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From:   Aakarsh Jain <aakarsh.jain@samsung.com>
To:     linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org,
        linux-kernel@vger.kernel.org, devicetree@vger.kernel.org
Cc:     m.szyprowski@samsung.com, andrzej.hajda@intel.com,
        mchehab@kernel.org, hverkuil-cisco@xs4all.nl,
        ezequiel@vanguardiasur.com.ar, jernej.skrabec@gmail.com,
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        stanimir.varbanov@linaro.org, dillon.minfei@gmail.com,
        david.plowman@raspberrypi.com, mark.rutland@arm.com,
        robh+dt@kernel.org, krzk+dt@kernel.org, andi@etezian.org,
        alim.akhtar@samsung.com, aswani.reddy@samsung.com,
        pankaj.dubey@samsung.com, Aakarsh Jain <aakarsh.jain@samsung.com>
Subject: [Patch v7] dt-bindings: media: s5p-mfc: convert bindings to
 json-schema
Date:   Tue, 28 Mar 2023 17:17:29 +0530
Message-Id: <20230328114729.61436-1-aakarsh.jain@samsung.com>
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References: <CGME20230328114738epcas5p475b8fa1d1e86bbb86d004afe365e0259@epcas5p4.samsung.com>
Precedence: bulk

Convert s5p-mfc bindings to DT schema format using json-schema.

Signed-off-by: Aakarsh Jain <aakarsh.jain@samsung.com>
---
changes since v6:
kept hw properties for Exynos3250 and Exynos4
under different if:then condition.

changes since v5:
kept compatible strings under enum
sorted compatible strings
added iommu maxItems:2
Added indentation with 4 spaces in dts example

changes since v4:
Removed items from oneOf section
dropped black line
defined the iommus names items as
items:
-const left
-const right

changes since v3:
fixed dt-schema warnings and errors while running make dtbs_check and make dt_binding_check for ARMv7
Since, obsolete properties are not part of dt-node so we are not including these properties in dt-schema.

changes since v2:
changed Commit message from Adds to Convert
Removed text "This file has moved to samsung,s5p-mfc.yaml" from s5p-mfc.txt
fixed dt-schema warnings and errors while running make dtbs_check and make dt_binding_check

changes since v1:
fixed dt-schema warnings and errors while running make dtbs_check and make dt_binding_check
Removed description.
Listed items.
Added allOf:if:then for restricting two items to specific compatible

 .../devicetree/bindings/media/s5p-mfc.txt     |  78 --------
 .../bindings/media/samsung,s5p-mfc.yaml       | 184 ++++++++++++++++++
 2 files changed, 184 insertions(+), 78 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/media/samsung,s5p-mfc.yaml

diff --git a/Documentation/devicetree/bindings/media/s5p-mfc.txt b/Documentation/devicetree/bindings/media/s5p-mfc.txt
index 8eb90c043d5d..e69de29bb2d1 100644
--- a/Documentation/devicetree/bindings/media/s5p-mfc.txt
+++ b/Documentation/devicetree/bindings/media/s5p-mfc.txt
@@ -1,78 +0,0 @@
-* Samsung Multi Format Codec (MFC)
-
-Multi Format Codec (MFC) is the IP present in Samsung SoCs which
-supports high resolution decoding and encoding functionalities.
-The MFC device driver is a v4l2 driver which can encode/decode
-video raw/elementary streams and has support for all popular
-video codecs.
-
-Required properties:
-  - compatible : value should be either one among the following
-	(a) "samsung,mfc-v5" for MFC v5 present in Exynos4 SoCs
-	(b) "samsung,mfc-v6" for MFC v6 present in Exynos5 SoCs
-	(c) "samsung,exynos3250-mfc", "samsung,mfc-v7" for MFC v7
-	     present in Exynos3250 SoC
-	(d) "samsung,mfc-v7" for MFC v7 present in Exynos5420 SoC
-	(e) "samsung,mfc-v8" for MFC v8 present in Exynos5800 SoC
-	(f) "samsung,exynos5433-mfc" for MFC v8 present in Exynos5433 SoC
-	(g) "samsung,mfc-v10" for MFC v10 present in Exynos7880 SoC
-
-  - reg : Physical base address of the IP registers and length of memory
-	  mapped region.
-
-  - interrupts : MFC interrupt number to the CPU.
-  - clocks : from common clock binding: handle to mfc clock.
-  - clock-names : from common clock binding: must contain "mfc",
-		  corresponding to entry in the clocks property.
-
-Optional properties:
-  - power-domains : power-domain property defined with a phandle
-			   to respective power domain.
-  - memory-region : from reserved memory binding: phandles to two reserved
-	memory regions, first is for "left" mfc memory bus interfaces,
-	second if for the "right" mfc memory bus, used when no SYSMMU
-	support is available; used only by MFC v5 present in Exynos4 SoCs
-
-Obsolete properties:
-  - samsung,mfc-r, samsung,mfc-l : support removed, please use memory-region
-	property instead
-
-
-Example:
-SoC specific DT entry:
-
-mfc: codec@13400000 {
-	compatible = "samsung,mfc-v5";
-	reg = <0x13400000 0x10000>;
-	interrupts = <0 94 0>;
-	power-domains = <&pd_mfc>;
-	clocks = <&clock 273>;
-	clock-names = "mfc";
-};
-
-Reserved memory specific DT entry for given board (see reserved memory binding
-for more information):
-
-reserved-memory {
-	#address-cells = <1>;
-	#size-cells = <1>;
-	ranges;
-
-	mfc_left: region@51000000 {
-		compatible = "shared-dma-pool";
-		no-map;
-		reg = <0x51000000 0x800000>;
-	};
-
-	mfc_right: region@43000000 {
-		compatible = "shared-dma-pool";
-		no-map;
-		reg = <0x43000000 0x800000>;
-	};
-};
-
-Board specific DT entry:
-
-codec@13400000 {
-	memory-region = <&mfc_left>, <&mfc_right>;
-};
diff --git a/Documentation/devicetree/bindings/media/samsung,s5p-mfc.yaml b/Documentation/devicetree/bindings/media/samsung,s5p-mfc.yaml
new file mode 100644
index 000000000000..084b44582a43
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/samsung,s5p-mfc.yaml
@@ -0,0 +1,184 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/samsung,s5p-mfc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos Multi Format Codec (MFC)
+
+maintainers:
+  - Marek Szyprowski <m.szyprowski@samsung.com>
+  - Aakarsh Jain <aakarsh.jain@samsung.com>
+
+description:
+  Multi Format Codec (MFC) is the IP present in Samsung SoCs which
+  supports high resolution decoding and encoding functionalities.
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - samsung,exynos5433-mfc        # Exynos5433
+          - samsung,mfc-v5                # Exynos4
+          - samsung,mfc-v6                # Exynos5
+          - samsung,mfc-v7                # Exynos5420
+          - samsung,mfc-v8                # Exynos5800
+          - samsung,mfc-v10               # Exynos7880
+      - items:
+          - enum:
+              - samsung,exynos3250-mfc    # Exynos3250
+          - const: samsung,mfc-v7         # Fall back for Exynos3250
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 3
+
+  clock-names:
+    minItems: 1
+    maxItems: 3
+
+  interrupts:
+    maxItems: 1
+
+  iommus:
+    minItems: 1
+    maxItems: 2
+
+  iommu-names:
+    minItems: 1
+    maxItems: 2
+
+  power-domains:
+    maxItems: 1
+
+  memory-region:
+    minItems: 1
+    maxItems: 2
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+
+additionalProperties: false
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,exynos3250-mfc
+    then:
+      properties:
+        clocks:
+          maxItems: 2
+        clock-names:
+          items:
+            - const: mfc
+            - const: sclk_mfc
+        iommus:
+          maxItems: 1
+        iommus-names: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,exynos5433-mfc
+    then:
+      properties:
+        clocks:
+          maxItems: 3
+        clock-names:
+          items:
+            - const: pclk
+            - const: aclk
+            - const: aclk_xiu
+        iommus:
+          maxItems: 2
+        iommus-names:
+          items:
+            - const: left
+            - const: right
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,mfc-v5
+    then:
+      properties:
+        clocks:
+          maxItems: 2
+        clock-names:
+          items:
+            - const: mfc
+            - const: sclk_mfc
+        iommus:
+          maxItems: 2
+        iommus-names:
+          items:
+            - const: left
+            - const: right
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,mfc-v6
+              - samsung,mfc-v8
+    then:
+      properties:
+        clocks:
+          maxItems: 1
+        clock-names:
+          items:
+            - const: mfc
+        iommus:
+          maxItems: 2
+        iommus-names:
+          items:
+            - const: left
+            - const: right
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,mfc-v7
+    then:
+      properties:
+        clocks:
+          minItems: 1
+          maxItems: 2
+        iommus:
+          minItems: 1
+          maxItems: 2
+
+examples:
+  - |
+    #include <dt-bindings/clock/exynos4.h>
+    #include <dt-bindings/clock/exynos-audss-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    codec@13400000 {
+        compatible = "samsung,mfc-v5";
+        reg = <0x13400000 0x10000>;
+        interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
+        power-domains = <&pd_mfc>;
+        clocks = <&clock CLK_MFC>, <&clock CLK_SCLK_MFC>;
+        clock-names = "mfc", "sclk_mfc";
+        iommus = <&sysmmu_mfc_l>, <&sysmmu_mfc_r>;
+        iommu-names = "left", "right";
+    };
-- 
2.17.1