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Date:   Tue, 17 Aug 2021 15:16:27 -0500
From:   Rob Herring <robh@kernel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc:     Michael Turquette <mturquette@baylibre.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Sylwester Nawrocki <s.nawrocki@samsung.com>,
        Tomasz Figa <tomasz.figa@gmail.com>,
        Chanwoo Choi <cw00.choi@samsung.com>,
        linux-clk@vger.kernel.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org,
        Sam Protsenko <semen.protsenko@linaro.org>
Subject: Re: [PATCH v2 1/8] dt-bindings: clock: samsung: convert Exynos5250
 to dtschema
Message-ID: <YRwZG1uerWt+NAQH@robh.at.kernel.org>
References: <20210810093145.26153-1-krzysztof.kozlowski@canonical.com>
 <20210810093145.26153-2-krzysztof.kozlowski@canonical.com>
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On Tue, Aug 10, 2021 at 11:31:38AM +0200, Krzysztof Kozlowski wrote:
> Convert Samsung Exynos5250 clock controller bindings to DT schema format
> using json-schema.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> ---
>  .../bindings/clock/exynos5250-clock.txt       | 41 ----------------
>  .../bindings/clock/samsung,exynos-clock.yaml  | 48 +++++++++++++++++++
>  MAINTAINERS                                   |  1 +
>  3 files changed, 49 insertions(+), 41 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/clock/exynos5250-clock.txt
>  create mode 100644 Documentation/devicetree/bindings/clock/samsung,exynos-clock.yaml
> 
> diff --git a/Documentation/devicetree/bindings/clock/exynos5250-clock.txt b/Documentation/devicetree/bindings/clock/exynos5250-clock.txt
> deleted file mode 100644
> index aff266a12eeb..000000000000
> --- a/Documentation/devicetree/bindings/clock/exynos5250-clock.txt
> +++ /dev/null
> @@ -1,41 +0,0 @@
> -* Samsung Exynos5250 Clock Controller
> -
> -The Exynos5250 clock controller generates and supplies clock to various
> -controllers within the Exynos5250 SoC.
> -
> -Required Properties:
> -
> -- compatible: should be one of the following.
> -  - "samsung,exynos5250-clock" - controller compatible with Exynos5250 SoC.
> -
> -- reg: physical base address of the controller and length of memory mapped
> -  region.
> -
> -- #clock-cells: should be 1.
> -
> -Each clock is assigned an identifier and client nodes can use this identifier
> -to specify the clock which they consume.
> -
> -All available clocks are defined as preprocessor macros in
> -dt-bindings/clock/exynos5250.h header and can be used in device
> -tree sources.
> -
> -Example 1: An example of a clock controller node is listed below.
> -
> -	clock: clock-controller@10010000 {
> -		compatible = "samsung,exynos5250-clock";
> -		reg = <0x10010000 0x30000>;
> -		#clock-cells = <1>;
> -	};
> -
> -Example 2: UART controller node that consumes the clock generated by the clock
> -	   controller. Refer to the standard clock bindings for information
> -	   about 'clocks' and 'clock-names' property.
> -
> -	serial@13820000 {
> -		compatible = "samsung,exynos4210-uart";
> -		reg = <0x13820000 0x100>;
> -		interrupts = <0 54 0>;
> -		clocks = <&clock CLK_UART2>, <&clock CLK_SCLK_UART2>;
> -		clock-names = "uart", "clk_uart_baud0";
> -	};
> diff --git a/Documentation/devicetree/bindings/clock/samsung,exynos-clock.yaml b/Documentation/devicetree/bindings/clock/samsung,exynos-clock.yaml
> new file mode 100644
> index 000000000000..cd6567bd8cc7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/samsung,exynos-clock.yaml
> @@ -0,0 +1,48 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/samsung,exynos-clock.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Samsung Exynos SoC clock controller
> +
> +maintainers:
> +  - Chanwoo Choi <cw00.choi@samsung.com>
> +  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
> +  - Sylwester Nawrocki <s.nawrocki@samsung.com>
> +  - Tomasz Figa <tomasz.figa@gmail.com>
> +
> +description: |
> +  All available clocks are defined as preprocessor macros in
> +  dt-bindings/clock/ headers.
> +
> +properties:
> +  compatible:
> +    const: samsung,exynos5250-clock
> +
> +  assigned-clocks: true
> +  assigned-clock-parents: true
> +  assigned-clock-rates: true

These can be dropped. They are always allowed if 'clocks' is present.

> +  clocks: true

This needs to define how many.

> +
> +  "#clock-cells":
> +    const: 1
> +
> +  reg:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - "#clock-cells"
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/exynos5250.h>
> +    clock: clock-controller@10010000 {
> +        compatible = "samsung,exynos5250-clock";
> +        reg = <0x10010000 0x30000>;
> +        #clock-cells = <1>;
> +    };
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 36aee8517ab0..2dbacacac3f5 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -16491,6 +16491,7 @@ L:	linux-samsung-soc@vger.kernel.org
>  S:	Supported
>  T:	git git://git.kernel.org/pub/scm/linux/kernel/git/snawrocki/clk.git
>  F:	Documentation/devicetree/bindings/clock/exynos*.txt
> +F:	Documentation/devicetree/bindings/clock/samsung,*.yaml
>  F:	Documentation/devicetree/bindings/clock/samsung,s3c*
>  F:	Documentation/devicetree/bindings/clock/samsung,s5p*
>  F:	drivers/clk/samsung/
> -- 
> 2.30.2
> 
>