linux-kernel - Re: [PATCH v6] cpufreq: qcom-nvmem: add support for IPQ8074

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Message-ID: <CAOX2RU5Zg_QUkKmEWzO-OkX68-sJxbfmpa21yYjkETW27Mf8KA@mail.gmail.com>
Date:   Fri, 13 Oct 2023 19:25:06 +0200
From:   Robert Marko <robimarko@...il.com>
To:     rafael@...nel.org, viresh.kumar@...aro.org, agross@...nel.org,
        andersson@...nel.org, konrad.dybcio@...aro.org,
        ilia.lin@...nel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v6] cpufreq: qcom-nvmem: add support for IPQ8074

On Fri, 13 Oct 2023 at 19:20, Robert Marko <robimarko@...il.com> wrote:
>
> IPQ8074 comes in 3 families:
> * IPQ8070A/IPQ8071A (Acorn) up to 1.4GHz
> * IPQ8172/IPQ8173/IPQ8174 (Oak) up to 1.4GHz
> * IPQ8072A/IPQ8074A/IPQ8076A/IPQ8078A (Hawkeye) up to 2.2GHz
>
> So, in order to be able to share one OPP table lets add support for IPQ8074
> family based of SMEM SoC ID-s as speedbin fuse is always 0 on IPQ8074.
>
> IPQ8074 compatible is blacklisted from DT platdev as the cpufreq device
> will get created by NVMEM CPUFreq driver.
>
> Signed-off-by: Robert Marko <robimarko@...il.com>
> Acked-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> ---
> Changes in v6:
> * Split IPQ8074 from the IPQ8064 as IPQ8064 has additional dependencies.

I discussed this with Christian and we decided to split out IPQ8074 as
it is much simpler
than IPQ8064 and has no additional dependencies so it makes sense split it out.

Regards,
Robert
>
> Changes in v4:
> * Add support for IPQ8174 (Oak) family
>
> Changes in v3:
> * Use enum for SoC versions
>
> Changes in v2:
> * Print an error if SMEM ID is not part of the IPQ8074 family
> and restrict the speed to Acorn variant (1.4GHz)
>
>  drivers/cpufreq/cpufreq-dt-platdev.c |  1 +
>  drivers/cpufreq/qcom-cpufreq-nvmem.c | 48 ++++++++++++++++++++++++++++
>  2 files changed, 49 insertions(+)
>
> diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
> index 0b3776f558db..675da7f36846 100644
> --- a/drivers/cpufreq/cpufreq-dt-platdev.c
> +++ b/drivers/cpufreq/cpufreq-dt-platdev.c
> @@ -181,6 +181,7 @@ static const struct of_device_id blocklist[] __initconst = {
>         { .compatible = "ti,am62p5", },
>
>         { .compatible = "qcom,ipq8064", },
> +       { .compatible = "qcom,ipq8074", },
>         { .compatible = "qcom,apq8064", },
>         { .compatible = "qcom,msm8974", },
>         { .compatible = "qcom,msm8960", },
> diff --git a/drivers/cpufreq/qcom-cpufreq-nvmem.c b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> index 84d7033e5efe..3fa12648ceb6 100644
> --- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> @@ -30,6 +30,11 @@
>
>  #include <dt-bindings/arm/qcom,ids.h>
>
> +enum ipq8074_versions {
> +       IPQ8074_HAWKEYE_VERSION = 0,
> +       IPQ8074_ACORN_VERSION,
> +};
> +
>  struct qcom_cpufreq_drv;
>
>  struct qcom_cpufreq_match_data {
> @@ -203,6 +208,44 @@ static int qcom_cpufreq_krait_name_version(struct device *cpu_dev,
>         return ret;
>  }
>
> +static int qcom_cpufreq_ipq8074_name_version(struct device *cpu_dev,
> +                                            struct nvmem_cell *speedbin_nvmem,
> +                                            char **pvs_name,
> +                                            struct qcom_cpufreq_drv *drv)
> +{
> +       u32 msm_id;
> +       int ret;
> +       *pvs_name = NULL;
> +
> +       ret = qcom_smem_get_soc_id(&msm_id);
> +       if (ret)
> +               return ret;
> +
> +       switch (msm_id) {
> +       case QCOM_ID_IPQ8070A:
> +       case QCOM_ID_IPQ8071A:
> +       case QCOM_ID_IPQ8172:
> +       case QCOM_ID_IPQ8173:
> +       case QCOM_ID_IPQ8174:
> +               drv->versions = BIT(IPQ8074_ACORN_VERSION);
> +               break;
> +       case QCOM_ID_IPQ8072A:
> +       case QCOM_ID_IPQ8074A:
> +       case QCOM_ID_IPQ8076A:
> +       case QCOM_ID_IPQ8078A:
> +               drv->versions = BIT(IPQ8074_HAWKEYE_VERSION);
> +               break;
> +       default:
> +               dev_err(cpu_dev,
> +                       "SoC ID %u is not part of IPQ8074 family, limiting to 1.4GHz!\n",
> +                       msm_id);
> +               drv->versions = BIT(IPQ8074_ACORN_VERSION);
> +               break;
> +       }
> +
> +       return 0;
> +}
> +
>  static const struct qcom_cpufreq_match_data match_data_kryo = {
>         .get_version = qcom_cpufreq_kryo_name_version,
>  };
> @@ -217,6 +260,10 @@ static const struct qcom_cpufreq_match_data match_data_qcs404 = {
>         .genpd_names = qcs404_genpd_names,
>  };
>
> +static const struct qcom_cpufreq_match_data match_data_ipq8074 = {
> +       .get_version = qcom_cpufreq_ipq8074_name_version,
> +};
> +
>  static int qcom_cpufreq_probe(struct platform_device *pdev)
>  {
>         struct qcom_cpufreq_drv *drv;
> @@ -360,6 +407,7 @@ static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
>         { .compatible = "qcom,msm8996", .data = &match_data_kryo },
>         { .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
>         { .compatible = "qcom,ipq8064", .data = &match_data_krait },
> +       { .compatible = "qcom,ipq8074", .data = &match_data_ipq8074 },
>         { .compatible = "qcom,apq8064", .data = &match_data_krait },
>         { .compatible = "qcom,msm8974", .data = &match_data_krait },
>         { .compatible = "qcom,msm8960", .data = &match_data_krait },
> --
> 2.41.0
>