linux-kernel - Re: [PATCH] New yaml file: tas2781

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Date:   Tue, 20 Dec 2022 17:04:11 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Kevin Lu <luminlong@....com>, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, shenghao-ding@...com,
        kevin-lu@...com, navada@...com, peeyush@...com
Subject: Re: [PATCH] New yaml file: tas2781

On 20/12/2022 15:41, Kevin Lu wrote:
> Add DTS discription for tas2781 driver code

1. Use subject prefixes matching the subsystem (git log --oneline -- ...).

2. Anyway that's not correct subject. Look at existing commits.

3. Run spell check.

4. Missing full stop.

> 
> Signed-off-by: Kevin Lu <luminlong@....com>
> ---
>  .../devicetree/bindings/sound/tas2781.yaml    | 90 +++++++++++++++++++
>  1 file changed, 90 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/tas2781.yaml

Filename with vendor prefix, just like compatible.

> 
> diff --git a/Documentation/devicetree/bindings/sound/tas2781.yaml b/Documentation/devicetree/bindings/sound/tas2781.yaml
> new file mode 100644
> index 000000000..96fa45bf6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/tas2781.yaml
> @@ -0,0 +1,90 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2022 Texas Instruments Incorporated
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/sound/tas2781.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"

Drop quotes from both.

> +
> +title: Texas Instruments TAS2781 Smart PA
> +
> +maintainers:
> +  - Shenghao Ding <shenghao-ding@...com>
> +  - Kevin Lu <kevin-lu@...com>
> +
> +description: |
> +  The TAS2781 is a mono, digital input Class-D audio amplifier
> +  optimized for efficiently driving high peak power into small
> +  loudspeakers. Integrated an 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.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - ti,tas2781
> +      - ti,audev

That's not a correct (real) compatible. Drop.

> +    description: |
> +        ti,audev will disable the irq of tas2781.

Drop description.

Missing blank line.

> +  reg:
> +    maxItems: 1
> +    description: |
> +       I2C address of the device can be between 0x38 to 0x40.
> +
> +  reset-gpioN:

Nope, use existing property. See gpio-consumer-common

> +    maxItems: 4
> +    description: GPIO used to reset the device.

This does not work like that. You did not even test it, right?

> +
> +  ti,topleft-channel:
> +    maxItems: 1
> +    description: I2C Address for each specific device.

No clue what's this. You need to explain in details in description.

> +
> +  ti,topright-channel:
> +    maxItems: 1

Ditto and in all other places.

> +
> +  ti,bottomleft-channel:
> +    maxItems: 1
> +
> +  ti,bottomright-channel:
> +    maxItems: 1
> +
> +  ti,global-address:
> +    maxItems: 1
> +    description: This item is not mandatory. if the device support gloabel mode, this item should be active.

I have no clue what is gloabel mode but the field looks incorrect. Drop
or properly describe.

Also wrong line wrapping.

> +
> +  ti,irq-gpio:
> +    maxItems: 1
> +    description: GPIO used to interrupt the device.

No. Use interrupts.

> +
> +  '#sound-dai-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +   #include <dt-bindings/gpio/gpio.h>
> +   i2c0 {

i2c

> +     #address-cells = <1>;
> +     #size-cells = <0>;
> +     codec: codec@38 {
> +       compatible = "ti,tas2781";
> +       reg = <0x38>;
> +       #sound-dai-cells = <1>;
> +       ti,topleft-channel = <0x38>;
> +       ti,topright-channel = <0x39>;
> +       ti,bottomright-channel = <0x3a>;
> +       ti,bottomright-channel = <0x3b>;
> +       ti,global-address = <0x40>;
> +       ti,reset-gpio0 = <&gpio1 10 GPIO_ACTIVE_HIGH>;
> +       ti,reset-gpio1 = <&gpio1 11 GPIO_ACTIVE_HIGH>;
> +       ti,reset-gpio2 = <&gpio1 12 GPIO_ACTIVE_HIGH>;
> +       ti,reset-gpio3 = <&gpio1 13 GPIO_ACTIVE_HIGH>;


Does not look like you tested the bindings. Please run `make
dt_binding_check` (see
Documentation/devicetree/bindings/writing-schema.rst for instructions).


Best regards,
Krzysztof