RE: [EXTERNAL] Re: [PATCH v4 1/4] ASoC: dt-bindings: move tas2563 from tas2562.yaml to tas2781.yaml

["Ding, Shenghao" <shenghao-ding@ti.com>]

> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> Sent: Wednesday, January 3, 2024 3:38 PM
> To: Ding, Shenghao <shenghao-ding@ti.com>; broonie@kernel.org;
> conor+dt@kernel.org
> Cc: robh+dt@kernel.org; andriy.shevchenko@linux.intel.com; Lu, Kevin
> <kevin-lu@ti.com>; Xu, Baojun <baojun.xu@ti.com>;
> devicetree@vger.kernel.org; lgirdwood@gmail.com; perex@perex.cz; pierre-
> louis.bossart@linux.intel.com; 13916275206@139.com; linux-
> sound@vger.kernel.org; linux-kernel@vger.kernel.org;
> liam.r.girdwood@intel.com; soyer@irl.hu; tiwai@suse.de; Gupta, Peeyush
> <peeyush@ti.com>; Navada Kanyana, Mukund <navada@ti.com>
> Subject: [EXTERNAL] Re: [PATCH v4 1/4] ASoC: dt-bindings: move tas2563
> from tas2562.yaml to tas2781.yaml
> 
> On 28/12/2023 16:30, Shenghao Ding wrote:
> > Move tas2563 from tas2562.yaml to tas2781.yaml to unbind tas2563 from
> > tas2562 driver code and bind it to tas2781 driver code, because
> > tas2563 only work in bypass-DSP mode with tas2562 driver. In order to
> > enable DSP mode for tas2563, it has been moved to tas2781 driver. As
> > to the hardware part, such as register setting and DSP firmware, all
> > these are stored in the binary firmware. What tas2781 drivder dooes is
> > to parse the firmware and download it to the chip, then power on the
> > chip. So, tas2781 driver can be resued as tas2563 driver. Only
> > attention will be paid to downloading corresponding firmware.
> >
> > Signed-off-by: Shenghao Ding <shenghao-ding@ti.com>
> >
> > ---
> > Change in v4:
> >  - remove tas2563, which will be move to tas2781 driver.
> >  - Add more comments on why to move tas2563 to tas2781 driver.
> >  - Provide rationale in terms of bindings and hardware, not in terms of
> driver.
> >    Or at least not only.
> >  - Reorder chip, tas2563 is first, tas2781 is second.
> >  - Add datasheet linkings.
> >  - squash both tas2562 and tas2781 binding patches.
> >  - Put allOf: to the end of the file, after required: block.
> > ---
> >  .../devicetree/bindings/sound/tas2562.yaml    |  2 -
> >  .../devicetree/bindings/sound/ti,tas2781.yaml | 85
> > ++++++++++++++-----
> >  2 files changed, 64 insertions(+), 23 deletions(-)
> >
> > diff --git a/Documentation/devicetree/bindings/sound/tas2562.yaml
> > b/Documentation/devicetree/bindings/sound/tas2562.yaml
> > index f01c0dde0cf7..d28c102c0ce7 100644
> > --- a/Documentation/devicetree/bindings/sound/tas2562.yaml
> > +++ b/Documentation/devicetree/bindings/sound/tas2562.yaml
> > @@ -18,7 +18,6 @@ description: |
> >
> >    Specifications about the audio amplifier can be found at:
> >      https://www.ti.com/lit/gpn/tas2562
> > -    https://www.ti.com/lit/gpn/tas2563
> >      https://www.ti.com/lit/gpn/tas2564
> >      https://www.ti.com/lit/gpn/tas2110
> >
> > @@ -29,7 +28,6 @@ properties:
> >    compatible:
> >      enum:
> >        - ti,tas2562
> > -      - ti,tas2563
> >        - ti,tas2564
> >        - ti,tas2110
> >
> > diff --git a/Documentation/devicetree/bindings/sound/ti,tas2781.yaml
> > b/Documentation/devicetree/bindings/sound/ti,tas2781.yaml
> > index a69e6c223308..78d89008c36f 100644
> > --- a/Documentation/devicetree/bindings/sound/ti,tas2781.yaml
> > +++ b/Documentation/devicetree/bindings/sound/ti,tas2781.yaml
> > @@ -5,36 +5,41 @@
> >  $id: http://devicetree.org/schemas/sound/ti,tas2781.yaml#
> >  $schema: http://devicetree.org/meta-schemas/core.yaml#
> >
> > -title: Texas Instruments TAS2781 SmartAMP
> > +title: Texas Instruments TAS2563/TAS2781 SmartAMP
> >
> >  maintainers:
> >    - Shenghao Ding <shenghao-ding@ti.com>
> >
> > -description:
> > -  The TAS2781 is a mono, digital input Class-D audio amplifier
> > -  optimized for efficiently driving high peak power into small
> > -  loudspeakers. An integrated on-chip DSP supports Texas Instruments
> > -  Smart Amp speaker protection algorithm. The integrated speaker
> > -  voltage and current sense provides for real time
> > +description: |
> > +  The TAS2563/TAS2781 is a mono, digital input Class-D audio
> > +  amplifier optimized for efficiently driving high peak power into
> > +  small loudspeakers. An integrated on-chip DSP supports Texas
> > +  Instruments Smart Amp speaker protection algorithm. The
> > +  integrated speaker voltage and current sense provides for real time
> >    monitoring of loudspeaker behavior.
> >
> > -allOf:
> > -  - $ref: dai-common.yaml#
> > +  Specifications about the audio amplifier can be found at:
> > +    https://www.ti.com/lit/gpn/tas2563
> > +    https://www.ti.com/lit/gpn/tas2781
> >
> >  properties:
> >    compatible:
> > -    enum:
> > -      - ti,tas2781
> > -
> > -  reg:
> > -    description:
> > -      I2C address, in multiple tas2781s case, all the i2c address
> > -      aggregate as one Audio Device to support multiple audio slots.
> > -    maxItems: 8
> > -    minItems: 1
> > -    items:
> > -      minimum: 0x38
> > -      maximum: 0x3f
> > +    description: |
> > +      ti,tas2563: 6.1-W Boosted Class-D Audio Amplifier With Integrated
> > +      DSP and IV Sense, 16/20/24/32bit stereo I2S or multichannel TDM.
> > +
> > +      ti,tas2781: 24-V Class-D Amplifier with Real Time Integrated Speaker
> > +      Protection and Audio Processing, 16/20/24/32bit stereo I2S or
> > +      multichannel TDM.
> > +    oneOf:
> > +      - items:
> > +          - enum:
> > +              - ti,tas2563
> > +          - const: ti,tas2781
> > +      - enum:
> > +          - ti,tas2781
> > +
> > +  reg: true
> 
> min/maxItems must stay here
> 
> I already reminded this in v3.
How to express maxItems is 4 for tas2563 on the same i2c bus(only 4 different i2c addresses) 
and maxItems is 8 for tas2781 on the same i2c bus (8 different i2c addresses) here.
> 
> 
> Best regards,
> Krzysztof