From: Viresh Kumar <viresh.kumar@linaro.org>
To: Lukasz Luba <lukasz.luba@arm.com>
Cc: linux-kernel@vger.kernel.org, dietmar.eggemann@arm.com,
rafael@kernel.org, daniel.lezcano@linaro.org, nm@ti.com,
sboyd@kernel.org, mka@chromium.org, dianders@chromium.org,
robh+dt@kernel.org, devicetree@vger.kernel.org,
linux-pm@vger.kernel.org
Subject: Re: [RFC][PATCH 1/2] dt-bindings: power: add Energy Model bindings
Date: Tue, 22 Feb 2022 08:33:37 +0530 [thread overview]
Message-ID: <20220222030337.ijnfrh367illmidr@vireshk-i7> (raw)
In-Reply-To: <20220221225131.15836-2-lukasz.luba@arm.com>
On 21-02-22, 22:51, Lukasz Luba wrote:
> Add DT bindings for the Energy Model information.
>
> Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
> ---
> .../bindings/power/energy-model.yaml | 51 +++++++++++++++++++
> 1 file changed, 51 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/power/energy-model.yaml
>
> diff --git a/Documentation/devicetree/bindings/power/energy-model.yaml b/Documentation/devicetree/bindings/power/energy-model.yaml
> new file mode 100644
> index 000000000000..804a9b324925
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/energy-model.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/power/energy-model.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Energy Model Bindings
> +
> +maintainers:
> + - Lukasz Luba <lukasz.luba@arm.com>
> +
> +description: |+
> + Devices work at specific performance states (frequencies). The power which
> + is used at a given performance state is an important information. A framework
> + which maintains this information is Energy Model. This document defines
> + bindings for these Energy Model performance states applicable across wide
> + range of devices. For illustration purpose, this document uses GPU as a device.
> +
> + This binding only supports frequency-power pairs.
> +
> +select: true
> +
> +properties:
> + operating-points:
> + $ref: /schemas/types.yaml#/definitions/uint32-matrix
> + items:
> + items:
> + - description: Frequency in kHz
> + - description: Power in uW
> +
> +
> +additionalProperties: true
> +examples:
> + {
> + gpu_energy_model: energy-model {
> + compatible = "energy-model";
> + energy-model-entries = <
> + 200000 300000
> + 297000 500000
> + 400000 800000
> + 500000 1400000
> + 600000 2000000
> + 800000 2800000
> + >;
> + };
> + };
> +
> + &gpu {
> + energy-model = <&gpu_energy_model>;
> + };
What about getting this from the OPP table instead? There is no point adding
similar tables for a device.
--
viresh
next prev parent reply other threads:[~2022-02-22 3:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-21 22:51 [RFC][PATCH 0/2] Introduce 'advanced' Energy Model in DT Lukasz Luba
2022-02-21 22:51 ` [RFC][PATCH 1/2] dt-bindings: power: add Energy Model bindings Lukasz Luba
2022-02-22 3:03 ` Viresh Kumar [this message]
2022-02-22 8:06 ` Lukasz Luba
2022-02-22 9:45 ` Viresh Kumar
2022-02-22 10:03 ` Lukasz Luba
2022-02-22 10:12 ` Viresh Kumar
2022-02-22 11:03 ` Lukasz Luba
2022-02-22 11:15 ` Viresh Kumar
2022-02-22 11:23 ` Lukasz Luba
2022-02-22 14:22 ` Rob Herring
2022-02-22 14:30 ` Lukasz Luba
2022-02-21 22:51 ` [RFC][PATCH 2/2] opp: Add support for 'advanced' Energy Model in DT Lukasz Luba
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