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Message-ID: <20241230194614.GA2255009-robh@kernel.org>
Date: Mon, 30 Dec 2024 13:46:14 -0600
From: Rob Herring <robh@...nel.org>
To: akemnade@...nel.org
Cc: Tero Kristo <kristo@...nel.org>, Andreas Kemnade <andreas@...nade.info>,
Tony Lindgren <tony@...mide.com>, devicetree@...r.kernel.org,
Stephen Boyd <sboyd@...nel.org>, Conor Dooley <conor+dt@...nel.org>,
linux-kernel@...r.kernel.org,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Michael Turquette <mturquette@...libre.com>,
linux-clk@...r.kernel.org, linux-omap@...r.kernel.org
Subject: Re: [PATCH 2/2] dt-bindings: clock: ti: Convert composite.txt to
json-schema
On Sun, Dec 29, 2024 at 02:53:51PM +0100, akemnade@...nel.org wrote:
> From: Andreas Kemnade <andreas@...nade.info>
>
> Convert the OMAP gate clock device tree binding to json-schema.
> Specify the creator of the original binding as a maintainer.
> Choose GPL-only license because original binding was also GPL.
>
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---
> .../bindings/clock/ti/composite.txt | 55 -------------
> .../bindings/clock/ti/ti,composite-clock.yaml | 80 +++++++++++++++++++
> 2 files changed, 80 insertions(+), 55 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/clock/ti/composite.txt
> create mode 100644 Documentation/devicetree/bindings/clock/ti/ti,composite-clock.yaml
>
> diff --git a/Documentation/devicetree/bindings/clock/ti/composite.txt b/Documentation/devicetree/bindings/clock/ti/composite.txt
> deleted file mode 100644
> index 238e6f7d74f8..000000000000
> --- a/Documentation/devicetree/bindings/clock/ti/composite.txt
> +++ /dev/null
> @@ -1,55 +0,0 @@
> -Binding for TI composite clock.
> -
> -This binding uses the common clock binding[1]. It assumes a
> -register-mapped composite clock with multiple different sub-types;
> -
> -a multiplexer clock with multiple input clock signals or parents, one
> -of which can be selected as output, this behaves exactly as [2]
> -
> -an adjustable clock rate divider, this behaves exactly as [3]
> -
> -a gating function which can be used to enable and disable the output
> -clock, this behaves exactly as [4]
> -
> -The binding must provide a list of the component clocks that shall be
> -merged to this clock. The component clocks shall be of one of the
> -"ti,*composite*-clock" types.
> -
> -[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
> -[2] Documentation/devicetree/bindings/clock/ti/ti,mux-clock.yaml
> -[3] Documentation/devicetree/bindings/clock/ti/ti,divider-clock.yaml
> -[4] Documentation/devicetree/bindings/clock/ti/gate.txt
> -
> -Required properties:
> -- compatible : shall be: "ti,composite-clock"
> -- clocks : link phandles of component clocks
> -- #clock-cells : from common clock binding; shall be set to 0.
> -
> -Optional properties:
> -- clock-output-names : from common clock binding.
> -
> -Examples:
> -
> -usb_l4_gate_ick: usb_l4_gate_ick {
> - #clock-cells = <0>;
> - compatible = "ti,composite-interface-clock";
> - clocks = <&l4_ick>;
> - ti,bit-shift = <5>;
> - reg = <0x0a10>;
> -};
> -
> -usb_l4_div_ick: usb_l4_div_ick {
> - #clock-cells = <0>;
> - compatible = "ti,composite-divider-clock";
> - clocks = <&l4_ick>;
> - ti,bit-shift = <4>;
> - ti,max-div = <1>;
> - reg = <0x0a40>;
> - ti,index-starts-at-one;
> -};
> -
> -usb_l4_ick: usb_l4_ick {
> - #clock-cells = <0>;
> - compatible = "ti,composite-clock";
> - clocks = <&usb_l4_gate_ick>, <&usb_l4_div_ick>;
> -};
> diff --git a/Documentation/devicetree/bindings/clock/ti/ti,composite-clock.yaml b/Documentation/devicetree/bindings/clock/ti/ti,composite-clock.yaml
> new file mode 100644
> index 000000000000..b7063764bc0a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/ti/ti,composite-clock.yaml
> @@ -0,0 +1,80 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/ti/ti,composite-clock.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments composite clock
> +
> +maintainers:
> + - Tero Kristo <kristo@...nel.org>
> +
> +description: |
> + This binding assumes a register-mapped composite clock with multiple
> + different sub-types;
s/;/:/
> +
> + a multiplexer clock with multiple input clock signals or parents, one
> + of which can be selected as output, this behaves exactly as [1].
> +
> + an adjustable clock rate divider, this behaves exactly as [2].
> +
> + a gating function which can be used to enable and disable the output
> + clock, this behaves exactly as [3].
Indent these 3 paragraphs more since they are a list.
> +
> + The binding must provide a list of the component clocks that shall be
> + merged to this clock. The component clocks shall be of one of the
> + "ti,*composite*-clock" types.
> +
> + [1] Documentation/devicetree/bindings/clock/ti/ti,mux-clock.yaml
> + [2] Documentation/devicetree/bindings/clock/ti/ti,divider-clock.yaml
> + [3] Documentation/devicetree/bindings/clock/ti/ti,gate-clock.yaml
> +
> +properties:
> + compatible:
> + const: ti,composite-clock
> +
> + "#clock-cells":
> + const: 0
> +
> + clocks: true
> +
> + clock-output-names:
> + maxItems: 1
> +
> +required:
> + - compatible
> + - "#clock-cells"
> + - clocks
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + bus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + usb_l4_gate_ick: clock-controller@a10 {
> + #clock-cells = <0>;
> + compatible = "ti,composite-interface-clock";
> + clocks = <&l4_ick>;
> + ti,bit-shift = <5>;
> + reg = <0x0a10>;
> + };
> +
> + usb_l4_div_ick: clock-controller@a40 {
> + #clock-cells = <0>;
> + compatible = "ti,composite-divider-clock";
> + clocks = <&l4_ick>;
> + ti,bit-shift = <4>;
> + ti,max-div = <1>;
> + reg = <0x0a40>;
> + ti,index-starts-at-one;
> + };
> + };
> +
> + clock-controller {
> + #clock-cells = <0>;
> + compatible = "ti,composite-clock";
> + clocks = <&usb_l4_gate_ick>, <&usb_l4_div_ick>;
> + };
> --
> 2.39.5
>
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