linux-kernel - Re: [RFC v2 08/11] arm64: dts: sdm845: Add ufs opps and power-domains

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Message-ID: <CAPDyKFppirfM7B9TB=jZzo67E=rdMnfVKEjdv0wn1zBAUoY_HA@mail.gmail.com>
Date:   Tue, 14 May 2019 09:53:34 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Rajendra Nayak <rnayak@...eaurora.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        linux-serial@...r.kernel.org, linux-spi@...r.kernel.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        linux-scsi <linux-scsi@...r.kernel.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Doug Anderson <dianders@...omium.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [RFC v2 08/11] arm64: dts: sdm845: Add ufs opps and power-domains

On Wed, 20 Mar 2019 at 10:50, Rajendra Nayak <rnayak@...eaurora.org> wrote:
>
> Add the additional power domain and the OPP table for ufs on sdm845
> so the driver can set the appropriate performance state of the
> power domain while setting the clock rate.
>
> Signed-off-by: Rajendra Nayak <rnayak@...eaurora.org>
> ---
>  arch/arm64/boot/dts/qcom/sdm845.dtsi | 20 +++++++++++++++++++-
>  1 file changed, 19 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> index 027ffe6e93e8..a3af4a1757b4 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> @@ -1140,6 +1140,21 @@
>                         };
>                 };
>
> +               ufs_opp_table: ufs-opp-table {
> +                       compatible = "operating-points-v2";
> +
> +                       opp-50000000 {
> +                               opp-hz = /bits/ 64 <50000000>;
> +                               required-opps = <&rpmhpd_opp_min_svs>;
> +                       };
> +
> +                       opp-200000000 {
> +                               opp-hz = /bits/ 64 <200000000>;
> +                               required-opps = <&rpmhpd_opp_nom>;
> +
> +                       };
> +               };
> +
>                 ufs_mem_hc: ufshc@...4000 {
>                         compatible = "qcom,sdm845-ufshc", "qcom,ufshc",
>                                      "jedec,ufs-2.0";
> @@ -1148,7 +1163,7 @@
>                         phys = <&ufs_mem_phy_lanes>;
>                         phy-names = "ufsphy";
>                         lanes-per-direction = <2>;
> -                       power-domains = <&gcc UFS_PHY_GDSC>;
> +                       power-domains = <&gcc UFS_PHY_GDSC>, <&rpmhpd SDM845_CX>;

You probably want to use "power-domain-names" as well.

[...]

Kind regards
Uffe