linux-kernel - Re: [PATCH V4 08/14] cpufreq: mediatek: Make sram regulator optional

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Date:   Mon, 25 Apr 2022 11:06:58 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Rex-BC Chen <rex-bc.chen@...iatek.com>
Cc:     rafael@...nel.org, robh+dt@...nel.org, krzk+dt@...nel.org,
        matthias.bgg@...il.com, jia-wei.chang@...iatek.com,
        roger.lu@...iatek.com, hsinyi@...gle.com, khilman@...libre.com,
        angelogioacchino.delregno@...labora.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 V4 08/14] cpufreq: mediatek: Make sram regulator optional

On 22-04-22, 15:52, Rex-BC Chen wrote:
> From: Jia-Wei Chang <jia-wei.chang@...iatek.com>
> 
> For some MediaTek SoCs, like MT8186, it's possible that the sram regulator
> is shared between CPU and CCI.
> We hope regulator framework can return error for error handling rather
> than a dummy handler from regulator_get api.
> Therefore, we choose to use regulator_get_optional.
> 
> Signed-off-by: Jia-Wei Chang <jia-wei.chang@...iatek.com>
> Signed-off-by: Rex-BC Chen <rex-bc.chen@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  drivers/cpufreq/mediatek-cpufreq.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/mediatek-cpufreq.c b/drivers/cpufreq/mediatek-cpufreq.c
> index 0b2ca0c8eddc..97ce96421241 100644
> --- a/drivers/cpufreq/mediatek-cpufreq.c
> +++ b/drivers/cpufreq/mediatek-cpufreq.c
> @@ -438,7 +438,7 @@ static int mtk_cpu_dvfs_info_init(struct mtk_cpu_dvfs_info *info, int cpu)
>  	}
>  
>  	/* Both presence and absence of sram regulator are valid cases. */
> -	info->sram_reg = regulator_get_exclusive(cpu_dev, "sram");
> +	info->sram_reg = regulator_get_optional(cpu_dev, "sram");
>  	if (IS_ERR(info->sram_reg))
>  		info->sram_reg = NULL;
>  	else {

Applied. Thanks.

-- 
viresh