linux-kernel - Re: [PATCH 2/9] dt-bindings: ASoC: Add chv3-i2s

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Message-ID: <d30cb539-d5de-94c3-237a-fb27c97e7c5e@linaro.org>
Date:   Wed, 26 Apr 2023 15:15:30 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Paweł Anikiel <pan@...ihalf.com>
Cc:     alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, lgirdwood@...il.com,
        broonie@...nel.org, perex@...ex.cz, tiwai@...e.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        dinguyen@...nel.org, lars@...afoo.de, nuno.sa@...log.com,
        upstream@...ihalf.com
Subject: Re: [PATCH 2/9] dt-bindings: ASoC: Add chv3-i2s

On 25/04/2023 18:01, Paweł Anikiel wrote:
> On Fri, Apr 14, 2023 at 7:00 PM Krzysztof Kozlowski
> <krzysztof.kozlowski@...aro.org> wrote:
>>
>> On 14/04/2023 16:01, Paweł Anikiel wrote:
>>> Add binding for chv3-i2s device.
>>
>> Your subject needs improvements:
>> 1. ASoC goes before bindings
>> 2. You miss some meaningful title of device. "chv3-i2s" can be anything,
>> so add Google or Google Chameleon. Or use entire compatible.
> 
> Would "ASoC: dt-bindings: Add Google Chameleon v3 I2S device" be better?

Yes, thanks.

> 
>>
>>
>>>
>>> Signed-off-by: Paweł Anikiel <pan@...ihalf.com>
>>> ---
>>>  .../bindings/sound/google,chv3-i2s.yaml       | 42 +++++++++++++++++++
>>>  1 file changed, 42 insertions(+)
>>>  create mode 100644 Documentation/devicetree/bindings/sound/google,chv3-i2s.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/sound/google,chv3-i2s.yaml b/Documentation/devicetree/bindings/sound/google,chv3-i2s.yaml
>>> new file mode 100644
>>> index 000000000000..6f49cf059ac5
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/sound/google,chv3-i2s.yaml
>>> @@ -0,0 +1,42 @@
>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/sound/google,chv3-i2s.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Google Chameleon v3 I2S device
>>> +
>>> +maintainers:
>>> +  - Paweł Anikiel <pan@...ihalf.com>
>>> +
>>> +description: |
>>> +  I2S device for the Google Chameleon v3. The device handles both RX
>>> +  and TX using a producer/consumer ring buffer design.
>>> +
>>> +properties:
>>> +  compatible:
>>> +    const: google,chv3-i2s
>>
>> Missing blank line.
>>
>> Is chv3 the name of your SoC? Where are the SoC bindings? What's exactly
>> the versioning scheme for it (compatibles must be specific, not generic).
> 
> The Chameleon v3 is based around an Intel Arria 10 SoC FPGA. The i2s
> device is implemented inside the FPGA. Does this case require SoC
> bindings?

No, I was mistaken. I somehow get impression that's for Pixel... Sorry
for the noise.

> 
>>
>>> +  reg:
>>> +    items:
>>> +      - description: core registers
>>> +      - description: irq registers
>>
>> As well...
>>
>>> +  interrupts:
>>> +    maxItems: 1
>>> +
>>> +required:
>>> +  - compatible
>>> +  - reg
>>> +  - interrupts
>>> +
>>> +additionalProperties: false
>>> +
>>> +examples:
>>> +  - |
>>> +    #include <dt-bindings/interrupt-controller/irq.h>
>>> +
>>> +    i2s0: i2s@...60300 {
>>> +        compatible = "google,chv3-i2s";
>>> +        reg = <0xc0060300 0x100>,
>>> +              <0xc0060f00 0x10>;
>>> +        interrupts = <0 20 IRQ_TYPE_LEVEL_HIGH>;
>>
>> Isn't 0 also a known define?
> 
> Do you mean this?
> interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;


Yes, please.

Best regards,
Krzysztof