Re: [PATCH v2 1/5] dt-bindings: clock: add Amlogic T7 PLL clock controller

[Rob Herring <robh@kernel.org>]

On Wed, Jan 08, 2025 at 05:40:21PM +0800, Jian Hu wrote:
> Add DT bindings for the PLL clock controller of the Amlogic T7 SoC family.
> 
> Signed-off-by: Jian Hu <jian.hu@amlogic.com>
> ---
>  .../bindings/clock/amlogic,t7-pll-clkc.yaml   | 103 ++++++++++++++++++
>  .../dt-bindings/clock/amlogic,t7-pll-clkc.h   |  57 ++++++++++
>  2 files changed, 160 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/amlogic,t7-pll-clkc.yaml
>  create mode 100644 include/dt-bindings/clock/amlogic,t7-pll-clkc.h
> 
> diff --git a/Documentation/devicetree/bindings/clock/amlogic,t7-pll-clkc.yaml b/Documentation/devicetree/bindings/clock/amlogic,t7-pll-clkc.yaml
> new file mode 100644
> index 000000000000..fd0323678d37
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/amlogic,t7-pll-clkc.yaml
> @@ -0,0 +1,103 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +# Copyright (C) 2024 Amlogic, Inc. All rights reserved
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/amlogic,t7-pll-clkc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Amlogic T7 PLL Clock Control Controller
> +
> +maintainers:
> +  - Neil Armstrong <neil.armstrong@linaro.org>
> +  - Jerome Brunet <jbrunet@baylibre.com>
> +  - Jian Hu <jian.hu@amlogic.com>
> +  - Xianwei Zhao <xianwei.zhao@amlogic.com>
> +
> +if:

Move this after 'required' section.

Generally we put 'if' under 'allOf' because we're likely to have another 
if/then schema on the next compatible added. If you don't think this 
binding will ever get used on another chip, then it is fine as-is.

> +  properties:
> +    compatible:
> +      contains:
> +        const: amlogic,t7-pll-mclk
> +
> +then:
> +  properties:
> +    clocks:
> +      items:
> +        - description: mclk pll input oscillator gate
> +        - description: 24M oscillator input clock source for mclk_sel_0
> +        - description: fix 50Mhz input clock source for mclk_sel_0
> +
> +    clock-names:
> +      items:
> +        - const: input
> +        - const: mclk_in0
> +        - const: mclk_in1

Move these to top-level and then both of these are just 'minItems: 3'.

> +
> +else:
> +  properties:
> +    clocks:
> +      items:
> +        - description: pll input oscillator gate
> +
> +    clock-names:
> +      items:
> +        - const: input

And 'maxItems: 1' here.

> +
> +properties:
> +  compatible:
> +    enum:
> +      - amlogic,t7-pll-gp0
> +      - amlogic,t7-pll-gp1
> +      - amlogic,t7-pll-hifi
> +      - amlogic,t7-pll-pcie
> +      - amlogic,t7-mpll
> +      - amlogic,t7-pll-hdmi
> +      - amlogic,t7-pll-mclk
> +
> +  reg:
> +    maxItems: 1
> +
> +  '#clock-cells':
> +    const: 1
> +
> +  clocks:
> +    minItems: 1
> +    maxItems: 3
> +
> +  clock-names:
> +    minItems: 1
> +    maxItems: 3

These are the 'top-level' definitions if that's not clear.

> +
> +required:
> +  - compatible
> +  - '#clock-cells'
> +  - reg
> +  - clocks
> +  - clock-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    apb {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        clock-controller@8080 {
> +            compatible = "amlogic,t7-pll-gp0";
> +            reg = <0 0x8080 0 0x20>;
> +            clocks = <&scmi_clk 2>;
> +            clock-names = "input";
> +            #clock-cells = <1>;
> +        };
> +
> +        clock-controller@8300 {
> +            compatible = "amlogic,t7-pll-mclk";
> +            reg = <0 0x8300 0 0x18>;
> +            clocks = <&scmi_clk 2>,
> +                     <&xtal>,
> +                     <&scmi_clk 31>;
> +            clock-names = "input", "mclk_in0", "mclk_in1";
> +            #clock-cells = <1>;
> +        };
> +    };
> diff --git a/include/dt-bindings/clock/amlogic,t7-pll-clkc.h b/include/dt-bindings/clock/amlogic,t7-pll-clkc.h
> new file mode 100644
> index 000000000000..e88c342028db
> --- /dev/null
> +++ b/include/dt-bindings/clock/amlogic,t7-pll-clkc.h
> @@ -0,0 +1,57 @@
> +/* SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause */
> +/*
> + * Copyright (c) 2024 Amlogic, Inc. All rights reserved.
> + * Author: Jian Hu <jian.hu@amlogic.com>
> + */
> +
> +#ifndef __T7_PLL_CLKC_H
> +#define __T7_PLL_CLKC_H
> +
> +/* GP0 */
> +#define CLKID_GP0_PLL_DCO	0
> +#define CLKID_GP0_PLL		1
> +
> +/* GP1 */
> +#define CLKID_GP1_PLL_DCO	0
> +#define CLKID_GP1_PLL		1
> +
> +/* HIFI */
> +#define CLKID_HIFI_PLL_DCO	0
> +#define CLKID_HIFI_PLL		1
> +
> +/* PCIE */
> +#define CLKID_PCIE_PLL_DCO	0
> +#define CLKID_PCIE_PLL_DCO_DIV2	1
> +#define CLKID_PCIE_PLL_OD	2
> +#define CLKID_PCIE_PLL		3
> +
> +/* MPLL */
> +#define CLKID_MPLL_PREDIV	0
> +#define CLKID_MPLL0_DIV		1
> +#define CLKID_MPLL0		2
> +#define CLKID_MPLL1_DIV		3
> +#define CLKID_MPLL1		4
> +#define CLKID_MPLL2_DIV		5
> +#define CLKID_MPLL2		6
> +#define CLKID_MPLL3_DIV		7
> +#define CLKID_MPLL3		8
> +
> +/* HDMI */
> +#define CLKID_HDMI_PLL_DCO	0
> +#define CLKID_HDMI_PLL_OD	1
> +#define CLKID_HDMI_PLL		2
> +
> +/* MCLK */
> +#define CLKID_MCLK_PLL_DCO	0
> +#define CLKID_MCLK_PRE		1
> +#define CLKID_MCLK_PLL		2
> +#define CLKID_MCLK_0_SEL	3
> +#define CLKID_MCLK_0_DIV2	4
> +#define CLKID_MCLK_0_PRE	5
> +#define CLKID_MCLK_0		6
> +#define CLKID_MCLK_1_SEL	7
> +#define CLKID_MCLK_1_DIV2	8
> +#define CLKID_MCLK_1_PRE	9
> +#define CLKID_MCLK_1		10
> +
> +#endif /* __T7_PLL_CLKC_H */
> -- 
> 2.47.1
> 

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