linux-kernel - Re: [RESEND PATCH v2 1/2] cpufreq: qcom-nvmem: add support for IPQ8074

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Message-ID: <e162134f-1c5d-d815-08af-b8633f709db9@linaro.org>
Date:   Wed, 31 May 2023 05:08:15 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Robert Marko <robimarko@...il.com>, 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
Cc:     ansuelsmth@...il.com
Subject: Re: [RESEND PATCH v2 1/2] cpufreq: qcom-nvmem: add support for
 IPQ8074

On 30/05/2023 19:58, Robert Marko wrote:
> IPQ8074 comes in 2 families:
> * IPQ8070A/IPQ8071A (Acorn) 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>
> ---
> 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)

My comments to the patch2 apply here too. Would it be possible to add 
separate dtsi files targeting each of these families?

If not, please change IPQ8074_foo_VERSIONS macros to the enum instead of 
BIT(n).

> ---
>   drivers/cpufreq/cpufreq-dt-platdev.c |  1 +
>   drivers/cpufreq/qcom-cpufreq-nvmem.c | 43 ++++++++++++++++++++++++++++
>   2 files changed, 44 insertions(+)
> 
> diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
> index ea86c9f3ed7a..78f6ff933f93 100644
> --- a/drivers/cpufreq/cpufreq-dt-platdev.c
> +++ b/drivers/cpufreq/cpufreq-dt-platdev.c
> @@ -170,6 +170,7 @@ static const struct of_device_id blocklist[] __initconst = {
>   	{ .compatible = "ti,am62a7", },
>   
>   	{ .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 a88b6fe5db50..ce444b5962f2 100644
> --- a/drivers/cpufreq/qcom-cpufreq-nvmem.c
> +++ b/drivers/cpufreq/qcom-cpufreq-nvmem.c
> @@ -31,6 +31,9 @@
>   
>   #include <dt-bindings/arm/qcom,ids.h>
>   
> +#define IPQ8074_HAWKEYE_VERSION		BIT(0)
> +#define IPQ8074_ACORN_VERSION		BIT(1)
> +
>   struct qcom_cpufreq_drv;
>   
>   struct qcom_cpufreq_match_data {
> @@ -204,6 +207,41 @@ 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:
> +		drv->versions = IPQ8074_ACORN_VERSION;
> +		break;
> +	case QCOM_ID_IPQ8072A:
> +	case QCOM_ID_IPQ8074A:
> +	case QCOM_ID_IPQ8076A:
> +	case QCOM_ID_IPQ8078A:
> +		drv->versions = 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 = IPQ8074_ACORN_VERSION;
> +		break;
> +	}
> +
> +	return 0;
> +}
> +
>   static const struct qcom_cpufreq_match_data match_data_kryo = {
>   	.get_version = qcom_cpufreq_kryo_name_version,
>   };
> @@ -218,6 +256,10 @@ 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;
> @@ -363,6 +405,7 @@ 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 },

-- 
With best wishes
Dmitry