linux-kernel - Re: [PATCH V2 08/15] cpufreq: mediatek: Move voltage limits to platform data

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Date:   Fri, 8 Apr 2022 15:36:58 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Rex-BC Chen <rex-bc.chen@...iatek.com>, rafael@...nel.org,
        viresh.kumar@...aro.org, robh+dt@...nel.org, krzk+dt@...nel.org
Cc:     matthias.bgg@...il.com, jia-wei.chang@...iatek.com,
        roger.lu@...iatek.com, hsinyi@...gle.com, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH V2 08/15] cpufreq: mediatek: Move voltage limits to
 platform data

Il 08/04/22 06:59, Rex-BC Chen ha scritto:
> From: Jia-Wei Chang <jia-wei.chang@...iatek.com>
> 
> Voltages and shifts are defined as macros originally.
> There are different requirements of these values for each MediaTek SoCs.
> Therefore, we add the platform data and move these values into it.
> 
> Signed-off-by: Jia-Wei Chang <jia-wei.chang@...iatek.com>
> Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
> ---
>   drivers/cpufreq/mediatek-cpufreq.c | 90 ++++++++++++++++++++----------
>   1 file changed, 61 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c
> index 1369da62780a..0be5609ee82e 100644
> --- a/drivers/cpufreq/mediatek-cpufreq.c
> +++ b/drivers/cpufreq/mediatek-cpufreq.c

..snip..

> @@ -625,20 +649,27 @@ static struct platform_driver mtk_cpufreq_platdrv = {
>   	.probe		= mtk_cpufreq_probe,
>   };
>   
> +static const struct mtk_cpufreq_platform_data mtk_platform_data = {

I would prefer if you name this after the oldest SoC that is supported in this
driver, or after the IP version.

Example: if the oldest one is mt7622, then this should be mt7622_platform_data;
          if newer SoCs have got a different cpu frequency control IP, then we
          should have here something like
          mtk_v1_platform_data, mtk_v1_3_platform_data.

Please note that I didn't check release dates, so my reference to mt7622 is
purely casual.

Regards,
Angelo