linux-kernel - Re: [PATCH v2 2/2] devicetree bindings mmc Add bindings doc for Sunplus SP7021

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Date:   Sun, 28 Nov 2021 19:37:33 -0600
From:   Rob Herring <robh@...nel.org>
To:     "LH.Kuo" <lhjeff911@...il.com>
Cc:     p.zabel@...gutronix.de, daniel.thompson@...aro.org,
        lee.jones@...aro.org, u.kleine-koenig@...gutronix.de,
        ulf.hansson@...aro.org, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        qinjian@...lus1.com, wells.lu@...plus.com,
        "LH.Kuo" <lh.kuo@...plus.com>
Subject: Re: [PATCH v2 2/2] devicetree bindings mmc Add bindings doc for
 Sunplus SP7021

On Tue, Nov 09, 2021 at 03:58:25PM +0800, LH.Kuo wrote:
> Add devicetree bindings mmc Add bindings doc for Sunplus SP7021
> 
> Signed-off-by: LH.Kuo <lh.kuo@...plus.com>
> ---
> Changes in v2:
>  - Addressed all comments from Mr. Philipp Zabel
>  - Modified the structure and register access method.
>  - Modifiedthe path about MAINTAINERS. ( wrong messages PATH in v1).
> 
>  .../devicetree/bindings/mmc/sunplus-sd2.yaml       | 82 ++++++++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  2 files changed, 83 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml b/Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml
> new file mode 100644
> index 0000000..95dc0bb
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml
> @@ -0,0 +1,82 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright (C) Sunplus Co., Ltd. 2021
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mmc/sunplus-sd2.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Sunplus SD/SDIO controller
> +
> +maintainers:
> +  - lh.kuo <lh.kuo@...plus.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - sunplus,sp7021-card1
> +      - sunplus,sp7021-sdio

What's the difference between these 2 blocks?

> +
> +  reg:
> +    items:
> +      - description: Base address and length of the SD/SDIO registers

Just 'maxItems: 1' is sufficient.

> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  pinctrl-names:
> +    description:
> +      A pinctrl state named "default" must be defined.
> +    const: default
> +
> +  pinctrl-0:
> +    description:
> +      A phandle to the default pinctrl state.
> +
> +  max-frequency: true
> +
> +allOf:
> +  - $ref: "mmc-controller.yaml"
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - resets
> +  - pinctrl-names
> +  - pinctrl-0
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/sp-sp7021.h>
> +    #include <dt-bindings/reset/sp-sp7021.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    mmc1: mmc@...03e80 {

Use lower case hex.

> +       compatible = "sunplus,sp7021-card1";
> +       reg = <0x9c003e80 0x280>;
> +       interrupts = <21 IRQ_TYPE_LEVEL_HIGH>;
> +       clocks = <&clkc CARD_CTL1>;
> +       resets = <&rstc RST_CARD_CTL1>;
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&mmc1_mux &mmc1_mux_cd>;
> +       max-frequency = <52000000>;
> +    };
> +    sdio: mmc@...08400 {

Use lower case hex.

> +       compatible = "sunplus,sp7021-sdio";
> +       reg = <0x9c008400 0x280>;
> +       interrupts = <21 IRQ_TYPE_LEVEL_HIGH>;
> +       clocks = <&clkc CARD_CTL1>;
> +       resets = <&rstc RST_CARD_CTL1>;
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&pins_sdio>;
> +       max-frequency = <52000000>;
> +    };   
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 2746084..e653a1d 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -18193,6 +18193,7 @@ SUNPLUS SD/SDIO HOST CONTROLLER INTERFACE DRIVER
>  M:	LH Kuo <lh.kuo@...plus.com>
>  L:	linux-mmc@...r.kernel.org
>  S:	Maintained
> +F:	Documentation/devicetree/bindings/mmc/sunplus-sd2.yaml
>  F:	drivers/mmc/host/sunplus_sd2.*
>  
>  SUPERH
> -- 
> 2.7.4
> 
>