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From: Rob Herring <robh@kernel.org>
To: Hector Yuan <hector.yuan@mediatek.com>
Cc: linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	wsd_upstream@mediatek.com
Subject: Re: [PATCH v13 1/2] dt-bindings: cpufreq: add bindings for MediaTek cpufreq HW
Date: Tue, 3 Aug 2021 13:22:27 -0600	[thread overview]
Message-ID: <YQmXc2kofIZacBRw@robh.at.kernel.org> (raw)
In-Reply-To: <1627574891-26514-2-git-send-email-hector.yuan@mediatek.com>

On Fri, Jul 30, 2021 at 12:08:10AM +0800, Hector Yuan wrote:
> From: "Hector.Yuan" <hector.yuan@mediatek.com>
> 
> Add devicetree bindings for MediaTek HW driver.
> 
> Signed-off-by: Hector.Yuan <hector.yuan@mediatek.com>
> ---
>  .../bindings/cpufreq/cpufreq-mediatek-hw.yaml      |   70 ++++++++++++++++++++
>  1 file changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml
> 
> diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml
> new file mode 100644
> index 0000000..6bb2c97
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/cpufreq/cpufreq-mediatek-hw.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek's CPUFREQ Bindings
> +
> +maintainers:
> +  - Hector Yuan <hector.yuan@mediatek.com>
> +
> +description:
> +  CPUFREQ HW is a hardware engine used by MediaTek
> +  SoCs to manage frequency in hardware. It is capable of controlling frequency
> +  for multiple clusters.

Strange choice of line breaks.

> +
> +properties:
> +  compatible:
> +    const: mediatek,cpufreq-hw
> +
> +  reg:
> +    minItems: 1
> +    maxItems: 2
> +    description: |

Don't need '|' unless there's formatting to preserve.

> +      Addresses and sizes for the memory of the
> +      HW bases in each frequency domain.

'Each entry corresponds to a register bank for each frequency 
domain present.'

> +
> +  "#performance-domain-cells":
> +    description:
> +      Number of cells in a performance domain specifier. Typically 1 for nodes
> +      providing multiple performance domains (e.g. performance controllers),
> +      but can be any value as specified by device tree binding documentation
> +      of particular provider.
> +    const: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - "#performance-domain-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    cpus {
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            cpu0: cpu@0 {
> +                device_type = "cpu";
> +                compatible = "arm,cortex-a55";
> +                enable-method = "psci";
> +                performance-domains = <&performance 0>;
> +                reg = <0x000>;
> +            };
> +    };
> +
> +    /* ... */
> +
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        performance: performance-controller@11bc00 {
> +            compatible = "mediatek,cpufreq-hw";
> +            reg = <0 0x0011bc10 0 0x120>, <0 0x0011bd30 0 0x120>;
> +
> +            #performance-domain-cells = <1>;
> +        };
> +    };
> -- 
> 1.7.9.5
> 
> 

  parent reply	other threads:[~2021-08-03 19:22 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29 16:08 [PATCH v13] cpufreq: mediatek-hw: Add support for Mediatek cpufreq HW driver Hector Yuan
2021-07-29 16:08 ` [PATCH v13 1/2] dt-bindings: cpufreq: add bindings for MediaTek cpufreq HW Hector Yuan
2021-08-03  5:05   ` Viresh Kumar
2021-08-03 19:17     ` Rob Herring
2021-08-03 19:22   ` Rob Herring [this message]
2021-07-29 16:08 ` [PATCH v13 2/2] cpufreq: mediatek-hw: Add support for CPUFREQ HW Hector Yuan
2021-08-03  7:13   ` Viresh Kumar
2021-08-16 12:56     ` Hector Yuan
2021-08-17  3:42       ` Viresh Kumar

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