linux-kernel - Re: [PATCH 2/2] ASoC: sun50i-dmic: dt-bindings: add DT bindings for DMIC controller

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Message-ID: <CAE=m619_52DDC_up=QqRXkF88uJR6CcAJqentnBzb=pxL7LhxA@mail.gmail.com>
Date:   Wed, 16 Jun 2021 18:56:25 +0800
From:   班涛 <fengzheng923@...il.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     lgirdwood@...il.com, broonie@...nel.org, robh+dt@...nel.org,
        wens@...e.org, jernej.skrabec@...il.com,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ASoC: sun50i-dmic: dt-bindings: add DT bindings for
 DMIC controller

Hi,

Maxime Ripard <maxime@...no.tech> 于2021年6月16日周三 下午4:49写道：
>
> Hi,
>
> On Tue, Jun 15, 2021 at 09:07:37PM +0800, Ban Tao wrote:
> > The Allwinner SoCs feature an I2S controller across multiple SoC
> > generations.
>
> Which SoC generations?
>
> > Signed-off-by: Ban Tao <fengzheng923@...il.com>
> > ---
> >  .../sound/allwinner,sun50i-h6-dmic.yaml       | 66 +++++++++++++++++++
> >  1 file changed, 66 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/sound/allwinner,sun50i-h6-dmic.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/sound/allwinner,sun50i-h6-dmic.yaml b/Documentation/devicetree/bindings/sound/allwinner,sun50i-h6-dmic.yaml
> > new file mode 100644
> > index 000000000000..81d40c374e44
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/sound/allwinner,sun50i-h6-dmic.yaml
> > @@ -0,0 +1,66 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/sound/allwinner,sun50i-h6-dmic.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Allwinner H6 DMIC Controller Device Tree Bindings
> > +
> > +maintainers:
> > +  - Ban Tao <fengzheng923@...il.com>
> > +
> > +properties:
> > +  "#sound-dai-cells":
> > +    const: 0
> > +
> > +  compatible:
> > +    const: allwinner,sun50i-h6-dmic
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +      - description: Bus Clock
> > +      - description: Module Clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: apb
> > +      - const: dmic
>
> The convention we use is bus and mod
>
> > +
> > +  dmas:
> > +    maxItems: 1
> > +
> > +  dma-names:
> > +    const: rx
> > +
> > +  resets:
> > +    maxItems: 1
> > +
> > +required:
> > +  - "#sound-dai-cells"
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - clock-names
> > +  - dmas
> > +  - dma-names
> > +  - resets
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    spdif: spdif@...5000 {
>
> The label and node name seems wrong?
>
Yes, in fact, I don’t know much about yaml format files.
The allwinner,sun50i-h6-dmic.yaml file is based on
allwinner,sun4i-a10-spdif.yaml.
So, How do i convert txt file to yaml file, for example:
---------------------------------------------
Required properties:

  - compatible         : should be one of the following:
    - "allwinner,sun50i-h6-dmic": for the Allwinner H6 SoC

  - reg                        : physical base address of the
controller and length of memory mapped region.

  - dmas               : Generic dma devicetree binding as described in
                         Documentation/devicetree/bindings/dma/dma.txt.

  - dma-names          : DMA have to be defined, "rx".

  - clocks             : Contains an entry for each entry in clock-names.

  - clock-names                : Includes the following entries:
       "apb"             clock for the dmic bus.
       "dmic"           clock for dmic controller.

  - resets             : reset specifier for the ahb reset

Example:

dmic: dmic@...5000 {
        #sound-dai-cells = <0>;
        compatible = "allwinner,sun50i-h6-dmic";
        reg = <0x05095000 0x400>;
        clocks = <&ccu CLK_BUS_DMIC>, <&ccu CLK_DMIC>;
        clock-names = "apb", "dmic";
        dmas = <&dma 7>;
        dma-names = "rx";
        resets = <&ccu RST_BUS_DMIC>;
};
---------------------------------------------

Thanks.


> > +        #sound-dai-cells = <0>;
> > +        compatible = "allwinner,sun50i-h6-dmic";
> > +        reg = <0x05095000 0x400>;
> > +        clocks = <&ccu CLK_BUS_DMIC>, <&ccu CLK_DMIC>;
>
> You'll need includes for it to compile
>
> Maxime