Re: [PATCH v3 4/7] dt-bindings: clock: mediatek: Add clock driver bindings for MT6795

On 25/06/2022 22:29, Krzysztof Kozlowski wrote:

On 24/06/2022 11:35, AngeloGioacchino Del Regno wrote:

quoted

Add the bindings for the clock drivers of the MediaTek Helio X10
MT6795 SoC.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
  .../bindings/clock/mediatek,mt6795-clock.yaml | 66 +++++++++++++++++
  .../clock/mediatek,mt6795-sys-clock.yaml      | 74 +++++++++++++++++++
  2 files changed, 140 insertions(+)
  create mode 100644 Documentation/devicetree/bindings/clock/mediatek,mt6795-clock.yaml
  create mode 100644 Documentation/devicetree/bindings/clock/mediatek,mt6795-sys-clock.yaml

diff --git a/Documentation/devicetree/bindings/clock/mediatek,mt6795-clock.yaml b/Documentation/devicetree/bindings/clock/mediatek,mt6795-clock.yaml
new file mode 100644
index 000000000000..795fb18721c3
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/mediatek,mt6795-clock.yaml

@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/clock/mediatek,mt6795-clock.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: MediaTek Functional Clock Controller for MT6795
+
+maintainers:
+  - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+  - Chun-Jie Chen <chun-jie.chen@mediatek.com>
+
+description: |
+  The clock architecture in MediaTek like below
+  PLLs -->
+          dividers -->
+                      muxes
+                           -->
+                              clock gate
+
+  The devices provide clock gate control in different IP blocks.
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt6795-mfgcfg
+      - mediatek,mt6795-vdecsys
+      - mediatek,mt6795-vencsys
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        mfgcfg: clock-controller@13000000 {
+            compatible = "mediatek,mt6795-mfgcfg";
+            reg = <0 0x13000000 0 0x1000>;
+            #clock-cells = <1>;
+        };
+
+        vdecsys: clock-controller@16000000 {
+            compatible = "mediatek,mt6795-vdecsys";
+            reg = <0 0x16000000 0 0x1000>;
+            #clock-cells = <1>;
+        };
+
+        vencsys: clock-controller@18000000 {
+            compatible = "mediatek,mt6795-vencsys";
+            reg = <0 0x18000000 0 0x1000>;
+            #clock-cells = <1>;
+        };
+    };

diff --git a/Documentation/devicetree/bindings/clock/mediatek,mt6795-sys-clock.yaml b/Documentation/devicetree/bindings/clock/mediatek,mt6795-sys-clock.yaml
new file mode 100644
index 000000000000..44b96af9ceaf
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/mediatek,mt6795-sys-clock.yaml

@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/clock/mediatek,mt6795-sys-clock.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: MediaTek System Clock Controller for MT6795
+
+maintainers:
+  - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+  - Chun-Jie Chen <chun-jie.chen@mediatek.com>
+
+description:
+  The Mediatek system clock controller provides various clocks and system configuration

Wrap according to Linux coding convention, so at 80.

What I understood that 100 length was agreed [1] as a limit. I haven't 
noticed any recent change regarding to line length.

[1] 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bdc48fa11e46f867ea4d75fa59ee87a7f48be144

quoted

+  like reset and bus protection on MT6795.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - mediatek,mt6795-apmixedsys
+          - mediatek,mt6795-infracfg
+          - mediatek,mt6795-pericfg
+          - mediatek,mt6795-topckgen
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - '#clock-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        topckgen: clock-controller@10000000 {
+            compatible = "mediatek,mt6795-topckgen", "syscon";
+            reg = <0 0x10000000 0 0x1000>;
+            #clock-cells = <1>;
+        };
+
+        infracfg: power-controller@10001000 {
+            compatible = "mediatek,mt6795-infracfg", "syscon";
+            reg = <0 0x10001000 0 0x1000>;
+            #clock-cells = <1>;
+            #reset-cells = <1>;

No need for four examples of the same. They differ only by compatible,
so this is just unnecessary code... which as you can see does not pass
the checks. This also has to be fixed.

Maybe keep it as clock-controller?


Best regards,
Krzysztof

-- 
David Heidelberg
Consultant Software Engineer

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