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[1/2] dt-bindings: phy: Add the Amlogic Meson8 HDMI TX PHY bindings

Message ID 20210604190338.2248295-2-martin.blumenstingl@googlemail.com
State Changes Requested
Headers show
Series phy: Add support for the HDMI TX PHY on Meson8/8b/8m2 | expand

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Commit Message

Martin Blumenstingl June 4, 2021, 7:03 p.m. UTC
Amlogic Meson8, Meson8b and Meson8m2 all include an identical (or at
least very similar) HDMI TX PHY. The PHY registers are part of the HHI
register area.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 .../phy/amlogic,meson8-hdmi-tx-phy.yaml       | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml

Comments

Rob Herring June 16, 2021, 11:31 p.m. UTC | #1
On Fri, Jun 04, 2021 at 09:03:37PM +0200, Martin Blumenstingl wrote:
> Amlogic Meson8, Meson8b and Meson8m2 all include an identical (or at
> least very similar) HDMI TX PHY. The PHY registers are part of the HHI
> register area.
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> ---
>  .../phy/amlogic,meson8-hdmi-tx-phy.yaml       | 51 +++++++++++++++++++
>  1 file changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml
> 
> diff --git a/Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml b/Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml
> new file mode 100644
> index 000000000000..18a123b9bb0a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/phy/amlogic,meson8-hdmi-tx-phy.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: Amlogic Meson8, Meson8b and Meson8m2 HDMI TX PHY
> +
> +maintainers:
> +  - Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> +
> +description: |+
> +  The HDMI TX PHY node should be the child of a syscon node with the
> +  required property:
> +
> +  compatible = "amlogic,meson-hhi-sysctrl", "simple-mfd", "syscon"

Is there a sub range of registers for this functionality in 
"amlogic,meson-hhi-sysctrl"? If so, please add a 'reg' property.

> +
> +  Refer to the bindings described in
> +  Documentation/devicetree/bindings/mfd/syscon.yaml
> +
> +properties:
> +  $nodename:
> +    pattern: "^hdmi-phy$"
> +
> +  compatible:
> +    enum:
> +      - amlogic,meson8-hdmi-tx-phy
> +      - amlogic,meson8b-hdmi-tx-phy
> +      - amlogic,meson8m2-hdmi-tx-phy
> +
> +  clocks:
> +    minItems: 1
> +    description:
> +      HDMI TMDS clock
> +
> +  "#phy-cells":
> +    const: 0
> +
> +required:
> +  - compatible
> +  - "#phy-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    hdmi_tx_phy: hdmi-phy {
> +      compatible = "amlogic,meson8-hdmi-tx-phy";
> +      clocks = <&tmds_clock>;
> +      #phy-cells = <0>;
> +    };
> -- 
> 2.31.1
Martin Blumenstingl June 17, 2021, 10:30 p.m. UTC | #2
Hi Rob,

On Thu, Jun 17, 2021 at 1:31 AM Rob Herring <robh@kernel.org> wrote:
[...]
> > +description: |+
> > +  The HDMI TX PHY node should be the child of a syscon node with the
> > +  required property:
> > +
> > +  compatible = "amlogic,meson-hhi-sysctrl", "simple-mfd", "syscon"
>
> Is there a sub range of registers for this functionality in
> "amlogic,meson-hhi-sysctrl"? If so, please add a 'reg' property.
yes, for this part of the HHI registers there's a dedicated sub range.
I'll add a reg property with register offset and size

one question about .dts validation: at least the clock controller
(which is also a sub-node of this) does not have a dedicated sub
range.
Is it still OK in this case to set #size-cells = <1> and
#address-cells = <1> in the HHI node?


Best regards,
Martin
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml b/Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml
new file mode 100644
index 000000000000..18a123b9bb0a
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/amlogic,meson8-hdmi-tx-phy.yaml
@@ -0,0 +1,51 @@ 
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/phy/amlogic,meson8-hdmi-tx-phy.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Amlogic Meson8, Meson8b and Meson8m2 HDMI TX PHY
+
+maintainers:
+  - Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+
+description: |+
+  The HDMI TX PHY node should be the child of a syscon node with the
+  required property:
+
+  compatible = "amlogic,meson-hhi-sysctrl", "simple-mfd", "syscon"
+
+  Refer to the bindings described in
+  Documentation/devicetree/bindings/mfd/syscon.yaml
+
+properties:
+  $nodename:
+    pattern: "^hdmi-phy$"
+
+  compatible:
+    enum:
+      - amlogic,meson8-hdmi-tx-phy
+      - amlogic,meson8b-hdmi-tx-phy
+      - amlogic,meson8m2-hdmi-tx-phy
+
+  clocks:
+    minItems: 1
+    description:
+      HDMI TMDS clock
+
+  "#phy-cells":
+    const: 0
+
+required:
+  - compatible
+  - "#phy-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    hdmi_tx_phy: hdmi-phy {
+      compatible = "amlogic,meson8-hdmi-tx-phy";
+      clocks = <&tmds_clock>;
+      #phy-cells = <0>;
+    };