linux-kernel - Re: [PATCH v4 1/2] dt-binding: mmc: Add mmc yaml file for Sunplus SP7021

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Message-ID: <c78aa9fa-8001-2c48-7a25-1f44f9952c9b@kernel.org>
Date:   Sun, 20 Mar 2022 12:41:47 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Tony Huang <tonyhuang.sunplus@...il.com>, ulf.hansson@...aro.org,
        robh+dt@...nel.org, lhjeff911@...il.com, linux-mmc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        p.zabel@...gutronix.de
Cc:     wells.lu@...plus.com, tony.huang@...plus.com
Subject: Re: [PATCH v4 1/2] dt-binding: mmc: Add mmc yaml file for Sunplus
 SP7021

On 19/03/2022 02:50, Tony Huang wrote:
> Add mmc yaml file for Sunplus SP7021
> 
> Signed-off-by: Tony Huang <tonyhuang.sunplus@...il.com>
> ---
> Changes in v4:
>  - Addressed comments from Ulf Hansson.
> 
>  .../devicetree/bindings/mmc/sunplus,mmc.yaml       | 79 ++++++++++++++++++++++
>  MAINTAINERS                                        |  6 ++
>  2 files changed, 85 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mmc/sunplus,mmc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mmc/sunplus,mmc.yaml b/Documentation/devicetree/bindings/mmc/sunplus,mmc.yaml
> new file mode 100644
> index 0000000..13ed07c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/sunplus,mmc.yaml
> @@ -0,0 +1,79 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) Sunplus Ltd. Co. 2021
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mmc/sunplus,mmc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: sunplus MMC controller

s/sunplus/Sunplus/

> +
> +allOf:
> +  - $ref: "mmc-controller.yaml"

allOf below maintainers,

> +
> +maintainers:
> +  - Tony Huang <tonyhuang.sunplus@...il.com>
> +  - Li-hao Kuo <lhjeff911@...il.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - sunplus,mmc-v1
> +      - sunplus,mmc-v2

How did this happen? Versions of blocks are usually discouraged, unless
you have clear specification,. The previous discussion did not end with
"add v1 and v2".

Do you have clear documentation/specification of these blocks? If no,
please use SoC compatibles.

> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 1

maxItems

> +
> +  resets:
> +    maxItems: 1
> +
> +  max-frequency: true
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - resets
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    mmc0: mmc@...03b00 {
> +        compatible = "sunplus,mmc-v2";
> +        reg = <0x9c003b00 0x180>;
> +        interrupts = <20 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&clkc 0x4e>;
> +        resets = <&rstc 0x3e>;
> +        bus-width = <8>;
> +        max-frequency = <52000000>;
> +        non-removable;
> +        disable-wp;
> +        cap-mmc-highspeed;
> +        mmc-ddr-3_3v;
> +        no-sdio;
> +        no-sd;
> +    };
> +
> +    mmc1: mmc@...03e80 {
> +       compatible = "sunplus,mmc-v1";
> +       reg = <0x9c003e80 0x280>;
> +       interrupts = <21 IRQ_TYPE_LEVEL_HIGH>;
> +       clocks = <&clkc 0x4f>;
> +       resets = <&rstc 0x3f>;
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&mmc1_mux &mmc1_mux_cd>;
> +       max-frequency = <52000000>;
> +       disable-wp;
> +       cap-sd-highspeed;
> +       no-sdio;
> +       no-mmc;
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index fb18ce7..2d91431 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -18242,6 +18242,12 @@ L:	netdev@...r.kernel.org
>  S:	Maintained
>  F:	drivers/net/ethernet/dlink/sundance.c
>  
> +SUNPLUS MMC DRIVER
> +M:	Tony Huang <tonyhuang.sunplus@...il.com>
> +M: Li-hao Kuo <lhjeff911@...il.com>

Wrong indentation.

> +S:	Maintained
> +F:	Documentation/devicetree/bindings/mmc/sunplu,mmc.yaml

Wrong file name.

> +
>  SUPERH
>  M:	Yoshinori Sato <ysato@...rs.sourceforge.jp>
>  M:	Rich Felker <dalias@...c.org>


Best regards,
Krzysztof