Re: [PATCH v3 5/5] dt-bindings: phy: uniphier: Clean up clocks, resets, and their names using compatible string

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Hi Krzysztof,

On 2022/03/31 2:40, Krzysztof Kozlowski wrote:
On 30/03/2022 12:55, Kunihiko Hayashi wrote:
Instead of "oneOf:" choices, use "allOf:" and "if:" to define clocks,
clock-names, resets, and reset-names that can be taken by the compatible
string.

The order of clock-names and reset-names doesn't change here.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
---
  .../phy/socionext,uniphier-ahci-phy.yaml      | 90 +++++++++++++-----
  .../phy/socionext,uniphier-pcie-phy.yaml      | 47 ++++++---
  .../phy/socionext,uniphier-usb3hs-phy.yaml    | 93 ++++++++++++++----
  .../phy/socionext,uniphier-usb3ss-phy.yaml    | 95 +++++++++++++++----
  4 files changed, 251 insertions(+), 74 deletions(-)


(...)

diff --git
a/Documentation/devicetree/bindings/phy/socionext,uniphier-usb3hs-phy.yaml
b/Documentation/devicetree/bindings/phy/socionext,uniphier-usb3hs-phy.yaml
index 1bbd164f2527..21e4414eea60 100644
---
a/Documentation/devicetree/bindings/phy/socionext,uniphier-usb3hs-phy.yaml
+++
b/Documentation/devicetree/bindings/phy/socionext,uniphier-usb3hs-phy.yaml
@@ -34,30 +34,12 @@ properties:
      minItems: 2
      maxItems: 3

-  clock-names:
-    oneOf:
-      - items:               # for Pro5
-          - const: gio
-          - const: link
-      - items:               # for PXs3 with phy-ext
-          - const: link
-          - const: phy
-          - const: phy-ext
-      - items:               # for others
-          - const: link
-          - const: phy
+  clock-names: true

    resets:
      maxItems: 2

-  reset-names:
-    oneOf:
-      - items:               # for Pro5
-          - const: gio
-          - const: link
-      - items:               # for others
-          - const: link
-          - const: phy
+  reset-names: true

    vbus-supply:
      description: A phandle to the regulator for USB VBUS
@@ -80,6 +62,77 @@ properties:
        required for each port, if any one is omitted, the trimming data
        of the port will not be set at all.

+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: socionext,uniphier-pro5-usb3-hsphy
+    then:
+      properties:
+        clocks:
+          minItems: 2
+          maxItems: 2
+        clock-names:
+          items:
+            - const: gio
+            - const: link
+        resets:
+          minItems: 2
+          maxItems: 2
+        reset-names:
+          items:
+            - const: gio
+            - const: link
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - socionext,uniphier-pxs2-usb3-hsphy
+              - socionext,uniphier-ld20-usb3-hsphy
+    then:
+      properties:
+        clocks:
+          minItems: 2
+          maxItems: 2
+        clock-names:
+          items:
+            - const: link
+            - const: phy
+        resets:
+          minItems: 2
+          maxItems: 2
+        reset-names:
+          items:
+            - const: link
+            - const: phy
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - socionext,uniphier-pxs3-usb3-hsphy
+              - socionext,uniphier-nx1-usb3-hsphy
+    then:
+      properties:
+        clocks:
+          minItems: 2

Why minItems:2? Is the last phy-ext clock optional?

In an SoC with two controllers, there is a controller that requires extra
clock and a controller that does not. For example, PXs3 USB3 controller 1
needs "phy-ext" clock, but the controller 0 doesn't.

This difference is related to the phy configuration, where the controller 1
requires more clocks because it shares the phy with other subsystems.

So I think the last phy-ext clock should be optional.


+          maxItems: 3
+        clock-names:
+          minItems: 2
+          items:
+            - const: link
+            - const: phy
+            - const: phy-ext
+        resets:
+          minItems: 2
+          maxItems: 2
+        reset-names:
+          items:
+            - const: link
+            - const: phy
+
  required:
    - compatible
    - reg
diff --git
a/Documentation/devicetree/bindings/phy/socionext,uniphier-usb3ss-phy.yaml
b/Documentation/devicetree/bindings/phy/socionext,uniphier-usb3ss-phy.yaml
index 06c957d52d23..4c26d2d2303d 100644
---
a/Documentation/devicetree/bindings/phy/socionext,uniphier-usb3ss-phy.yaml
+++
b/Documentation/devicetree/bindings/phy/socionext,uniphier-usb3ss-phy.yaml
@@ -35,34 +35,89 @@ properties:
      minItems: 2
      maxItems: 3

-  clock-names:
-    oneOf:
-      - items:             # for Pro4, Pro5
-          - const: gio
-          - const: link
-      - items:             # for PXs3 with phy-ext
-          - const: link
-          - const: phy
-          - const: phy-ext
-      - items:             # for others
-          - const: link
-          - const: phy
+  clock-names: true

    resets:
      maxItems: 2

-  reset-names:
-    oneOf:
-      - items:              # for Pro4,Pro5
-          - const: gio
-          - const: link
-      - items:              # for others
-          - const: link
-          - const: phy
+  reset-names: true

    vbus-supply:
      description: A phandle to the regulator for USB VBUS, only for USB
host

+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - socionext,uniphier-pro4-usb3-ssphy
+              - socionext,uniphier-pro5-usb3-ssphy
+    then:
+      properties:
+        clocks:
+          minItems: 2
+          maxItems: 2
+        clock-names:
+          items:
+            - const: gio
+            - const: link
+        resets:
+          minItems: 2
+          maxItems: 2
+        reset-names:
+          items:
+            - const: gio
+            - const: link
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - socionext,uniphier-pxs2-usb3-ssphy
+              - socionext,uniphier-ld20-usb3-ssphy
+    then:
+      properties:
+        clocks:
+          minItems: 2
+          maxItems: 2
+        clock-names:
+          items:
+            - const: link
+            - const: phy
+        resets:
+          minItems: 2
+          maxItems: 2
+        reset-names:
+          items:
+            - const: link
+            - const: phy
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - socionext,uniphier-pxs3-usb3-ssphy
+              - socionext,uniphier-nx1-usb3-ssphy
+    then:
+      properties:
+        clocks:
+          minItems: 2

Same question as above.

This is also the same reason.

Thank you,

---
Best Regards
Kunihiko Hayashi



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