Re: [PATCH v2] ASoC: dt-bindings: Convert cirrus,cs35l36 to DT schema

[Rob Herring]

On Wed, Jun 24, 2026 at 08:39:28PM +0200, David Heidelberg wrote:
> On 24/06/2026 20:17, Rob Herring wrote:
> > On Wed, Jun 24, 2026 at 11:02 AM David Heidelberg via B4 Relay
> > <devnull+david.ixit.cz@xxxxxxxxxx> wrote:
> > > 
> > > From: David Heidelberg <david@xxxxxxx>
> > > 
> > > Convert CS35L36 Speaker Amplifier to yaml.
> > > 
> > > Changes:
> > >   - maintainers email to the generic Cirrus email
> > >   - Both the codec and downstream worked just fine without
> > >     VP-supply provided. Align with datasheet for similar models.
> > >   - add dai-common.yaml to cover for '#sound-dai-cells',
> > >     'sound-name-prefix'
> > > 
> > > Reviewed-by: David Rhodes <David.Rhodes@xxxxxxxxxx>
> > 
> > If you are going to take stuff I haven't fixed:
> > 
> > Assisted-by: OpenAI:gpt-4
> > 
> > (I don't remember the exact flavor I used)
> > 
> > > Co-developed-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
> > > Signed-off-by: Rob Herring (Arm) <robh@xxxxxxxxxx>
> > > Signed-off-by: David Heidelberg <david@xxxxxxx>
> > > ---
> > > Relevant for Pixel 3 / 3XL / 4.
> > > ---
> > > Changes in v2:
> > > - Rename the commit. (Mark)
> > > - Link to v1: https://lore.kernel.org/r/20260618-dt-cirrus-cs35l36-v1-1-1a43515666ad@xxxxxxx
> > > ---
> > >   .../devicetree/bindings/sound/cirrus,cs35l36.yaml  | 224 +++++++++++++++++++++
> > >   .../devicetree/bindings/sound/cs35l36.txt          | 168 ----------------
> > >   2 files changed, 224 insertions(+), 168 deletions(-)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/sound/cirrus,cs35l36.yaml b/Documentation/devicetree/bindings/sound/cirrus,cs35l36.yaml
> > > new file mode 100644
> > > index 0000000000000..af0acaaefb68e
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/sound/cirrus,cs35l36.yaml
> > > @@ -0,0 +1,224 @@
> > > +# SPDX-License-Identifier: GPL-2.0-only
> > > +%YAML 1.2
> > > +---
> > > +$id: http://devicetree.org/schemas/cirrus,cs35l36.yaml#
> > > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > > +
> > > +title: Cirrus Logic CS35L36 Speaker Amplifier
> > > +
> > > +maintainers:
> > > +  - patches@xxxxxxxxxxxxxxxxxxxxx
> > > +  - Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> > 
> > Bjorn is not correct. Generally we want a person, not a company list.
> 
> I'm adding back James, can I keep the patches at 2nd place?

Yes.

> > > +      cirrus,vpbr-thld:
> > > +        description: Initial VPBR threshold voltage
> > > +        $ref: /schemas/types.yaml#/definitions/uint32
> > > +
> > > +      cirrus,vpbr-atk-rate:
> > > +        description: Attenuation attack step rate
> > > +        $ref: /schemas/types.yaml#/definitions/uint32
> > > +
> > > +      cirrus,vpbr-atk-vol:
> > > +        description: VP brownout prevention step size
> > > +        $ref: /schemas/types.yaml#/definitions/uint32
> > > +
> > > +      cirrus,vpbr-max-attn:
> > > +        description: Maximum attenuation during VP brownout prevention
> > > +        $ref: /schemas/types.yaml#/definitions/uint32
> > > +
> > > +      cirrus,vpbr-wait:
> > > +        description: Delay between brownout clearance and attenuation release
> > > +        $ref: /schemas/types.yaml#/definitions/uint32
> > > +
> > > +      cirrus,vpbr-rel-rate:
> > > +        description: Attenuation release step rate
> > > +        $ref: /schemas/types.yaml#/definitions/uint32
> > > +
> > > +      cirrus,vpbr-mute-en:
> > > +        description: Mute audio if maximum attenuation reached
> > > +        $ref: /schemas/types.yaml#/definitions/uint32
> > 
> > Constraints on any of these?
> 
> Code just applies whatever is thrown at it, maybe David knows more?
> 
> #nodatasheet (but would be lovely to have one)

Unless the driver just takes these values and shoves them straight into 
a 32-bit register, the driver should give some clue about the size or 
possible values.

Rob