linux-kernel - Re: [PATCH 2/7] soc: qcom: rpmpd: Add a powerdomain driver to model corners

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180318125247.qrttjjuvr7xniwmu@rob-hp-laptop>
Date:   Sun, 18 Mar 2018 07:52:47 -0500
From:   Rob Herring <robh@...nel.org>
To:     Rajendra Nayak <rnayak@...eaurora.org>
Cc:     viresh.kumar@...aro.org, sboyd@...nel.org, andy.gross@...aro.org,
        ulf.hansson@...aro.org, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/7] soc: qcom: rpmpd: Add a powerdomain driver to model
 corners

On Fri, Mar 16, 2018 at 09:38:19AM +0530, Rajendra Nayak wrote:
> The powerdomains for corners just pass the performance state set by the
> consumers to the RPM (Remote Power manager) which then takes care
> of setting the appropriate voltage on the corresponding rails to
> meet the performance needs.
> 
> We add all powerdomain data needed on msm8996 here. This driver can easily
> be extended by adding data for other qualcomm SoCs as well.
> 
> Signed-off-by: Rajendra Nayak <rnayak@...eaurora.org>
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
>  .../devicetree/bindings/power/qcom,rpmpd.txt       |  14 +
>  drivers/soc/qcom/Kconfig                           |   9 +
>  drivers/soc/qcom/Makefile                          |   1 +
>  drivers/soc/qcom/rpmpd.c                           | 299 +++++++++++++++++++++
>  4 files changed, 323 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/power/qcom,rpmpd.txt
>  create mode 100644 drivers/soc/qcom/rpmpd.c
> 
> diff --git a/Documentation/devicetree/bindings/power/qcom,rpmpd.txt b/Documentation/devicetree/bindings/power/qcom,rpmpd.txt
> new file mode 100644
> index 000000000000..4d7a4a1f054f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/qcom,rpmpd.txt
> @@ -0,0 +1,14 @@
> +Qualcomm RPM Powerdomains
> +
> +* For RPM powerdomains, we communicate a performance state to RPM
> +which then translates it into a corresponding voltage on a rail
> +
> +Required Properties:
> + - compatible: Should be one of the following
> +	* qcom,rpmpd-msm8996: RPM Powerdomain for the msm8996 family of SoC

qcom,msm8996-rpmpd

> + - power-domain-cells: number of cells in power domain specifier
> +	must be 1.
> + - domain-performance-state: One or more nodes describing the performance-states
> +	supported by the powerdomain.
> +	For domain-performance-state bindings refer to
> +	Documentation/devicetree/bindings/power/power_domain.txt