linux-kernel - Re: [PATCH 2/2] dt-binding: mmc: microchip,sdhci-pic32: convert text based binding to json schema

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Message-ID: <20250508-study-pursuable-05ea1564c9cd@spud>
Date: Thu, 8 May 2025 16:04:23 +0100
From: Conor Dooley <conor@...nel.org>
To: Charan Pedumuru <charan.pedumuru@...il.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Ulf Hansson <ulf.hansson@...aro.org>, devicetree@...r.kernel.org,
	linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mmc@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-binding: mmc: microchip,sdhci-pic32: convert text
 based binding to json schema

On Wed, May 07, 2025 at 06:29:36AM +0000, Charan Pedumuru wrote:
> Update text binding to YAML.
> Changes during conversion:
> Add appropriate include statements for interrupts and clock-names
> to resolve errors identified by `dt_binding_check` and `dtbs_check`.
> 
> Signed-off-by: Charan Pedumuru <charan.pedumuru@...il.com>
> ---
>  .../bindings/mmc/microchip,sdhci-pic32.txt         | 29 ----------
>  .../bindings/mmc/microchip,sdhci-pic32.yaml        | 66 ++++++++++++++++++++++
>  2 files changed, 66 insertions(+), 29 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/microchip,sdhci-pic32.txt b/Documentation/devicetree/bindings/mmc/microchip,sdhci-pic32.txt
> deleted file mode 100644
> index f064528effed31f30d1d1c6e0b49c02e215d99af..0000000000000000000000000000000000000000
> --- a/Documentation/devicetree/bindings/mmc/microchip,sdhci-pic32.txt
> +++ /dev/null
> @@ -1,29 +0,0 @@
> -* Microchip PIC32 SDHCI Controller
> -
> -This file documents differences between the core properties in mmc.txt
> -and the properties used by the sdhci-pic32 driver.
> -
> -Required properties:
> -- compatible: Should be "microchip,pic32mzda-sdhci"
> -- interrupts: Should contain interrupt
> -- clock-names: Should be "base_clk", "sys_clk".
> -               See: Documentation/devicetree/bindings/resource-names.txt
> -- clocks: Phandle to the clock.
> -          See: Documentation/devicetree/bindings/clock/clock-bindings.txt
> -- pinctrl-names: A pinctrl state names "default" must be defined.
> -- pinctrl-0: Phandle referencing pin configuration of the SDHCI controller.
> -             See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
> -
> -Example:
> -
> -	sdhci@...ec000 {
> -		compatible = "microchip,pic32mzda-sdhci";
> -		reg = <0x1f8ec000 0x100>;
> -		interrupts = <191 IRQ_TYPE_LEVEL_HIGH>;
> -		clocks = <&rootclk REF4CLK>, <&rootclk PB5CLK>;
> -		clock-names = "base_clk", "sys_clk";
> -		bus-width = <4>;
> -		cap-sd-highspeed;
> -		pinctrl-names = "default";
> -		pinctrl-0 = <&pinctrl_sdhc1>;
> -	};
> diff --git a/Documentation/devicetree/bindings/mmc/microchip,sdhci-pic32.yaml b/Documentation/devicetree/bindings/mmc/microchip,sdhci-pic32.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..ca0ca7df9ee991d8402bc4c62b1235ef5db2e85f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/microchip,sdhci-pic32.yaml
> @@ -0,0 +1,66 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mmc/microchip,sdhci-pic32.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip PIC32 SDHI Controller
> +
> +description:
> +  The Microchip PIC32 family of microcontrollers (MCUs) includes models with
> +  Secure Digital Host Controller Interface (SDHCI) controllers, allowing them
> +  to interface with Secure Digital (SD) cards. This interface is used for reading,
> +  writing, and managing data on SD cards, enabling storage and data transfer
> +  capabilities in embedded systems.
> +
> +allOf:
> +  - $ref: mmc-controller.yaml
> +
> +maintainers:
> +  - Ulf Hansson <ulf.hansson@...aro.org>
> +
> +properties:
> +  compatible:
> +    const: microchip,pic32mzda-sdhci
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 2
> +
> +  clock-names:
> +    items:
> +      - const: base_clk
> +      - const: sys_clk
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names

> +  - pinctrl-names
> +  - pinctrl-0

In a similar conversion for the platform, Rob dropped these from
required. I think you could probably do the same here.
Either way,
Acked-by: Conor Dooley <conor.dooley@...rochip.com>

> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/clock/microchip,pic32-clock.h>
> +    mmc@...ec000 {
> +        compatible = "microchip,pic32mzda-sdhci";
> +        reg = <0x1f8ec000 0x100>;
> +        interrupts = <191 IRQ_TYPE_LEVEL_HIGH>;
> +        clocks = <&rootclk REF4CLK>, <&rootclk PB5CLK>;
> +        clock-names = "base_clk", "sys_clk";
> +        bus-width = <4>;
> +        cap-sd-highspeed;
> +        pinctrl-names = "default";
> +        pinctrl-0 = <&pinctrl_sdhc1>;
> +    };
> +...
> 
> -- 
> 2.43.0
> 

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