linux-kernel - Re: [PATCH v4 17/37] PM / devfreq: tegra20: Relax Kconfig dependency

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Date:   Thu, 2 Jul 2020 11:10:29 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Mikko Perttunen <cyndis@...si.fi>
Cc:     Artur Świgoń <a.swigon@...sung.com>,
        linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v4 17/37] PM / devfreq: tegra20: Relax Kconfig
 dependency

On 6/9/20 10:13 PM, Dmitry Osipenko wrote:
> The Tegra EMC driver now could be compiled as a loadable kernel module.
> Currently devfreq driver depends on the EMC/MC drivers in Kconfig, and
> thus, devfreq is forced to be a kernel module if EMC is compiled as a
> module. This build dependency could be relaxed since devfreq driver
> checks MC/EMC presence on probe, allowing kernel configuration where
> devfreq is a built-in driver and EMC driver is a loadable module.
> This change puts Tegra20 devfreq Kconfig entry on a par with the Tegra30
> devfreq entry.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/devfreq/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
> index 37dc40d1fcfb..0ee36ae2fa79 100644
> --- a/drivers/devfreq/Kconfig
> +++ b/drivers/devfreq/Kconfig
> @@ -123,7 +123,7 @@ config ARM_TEGRA_DEVFREQ
>  
>  config ARM_TEGRA20_DEVFREQ
>  	tristate "NVIDIA Tegra20 DEVFREQ Driver"
> -	depends on (TEGRA_MC && TEGRA20_EMC) || COMPILE_TEST
> +	depends on ARCH_TEGRA_2x_SOC || COMPILE_TEST
>  	depends on COMMON_CLK
>  	select DEVFREQ_GOV_SIMPLE_ONDEMAND
>  	help
> 

Acked-by: Chanwoo Choi <cw00.choi@...sung.com>

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics