linux-kernel - Re: [PATCH 2/2] cpufreq: scmi: add thermal dependency

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Message-ID: <20180314051004.GF15832@vireshk-i7>
Date:   Wed, 14 Mar 2018 10:40:04 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Sudeep Holla <sudeep.holla@....com>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] cpufreq: scmi: add thermal dependency

On 13-03-18, 12:45, Arnd Bergmann wrote:
> A built-in scmi cpufreq driver cannot link against a modular
> thermal framework:
> 
> drivers/cpufreq/scmi-cpufreq.o: In function `scmi_cpufreq_ready':
> scmi-cpufreq.c:(.text+0x40): undefined reference to `of_cpufreq_cooling_register'
> drivers/cpufreq/scmi-cpufreq.o: In function `scmi_cpufreq_exit':
> scmi-cpufreq.c:(.text+0x88): undefined reference to `cpufreq_cooling_unregister'
> 
> This adds a Kconfig dependency that makes sure this configuration
> is not possible, while allowing all configurations that can work.
> Note that disabling CPU_THERMAL means we don't care about the
> THERMAL dependency.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/cpufreq/Kconfig.arm | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
> index d9457d1e535c..7f56fe5183f2 100644
> --- a/drivers/cpufreq/Kconfig.arm
> +++ b/drivers/cpufreq/Kconfig.arm
> @@ -242,6 +242,7 @@ config ARM_SA1110_CPUFREQ
>  config ARM_SCMI_CPUFREQ
>  	tristate "SCMI based CPUfreq driver"
>  	depends on ARM_SCMI_PROTOCOL || COMPILE_TEST
> +	depends on !CPU_THERMAL || THERMAL
>  	select PM_OPP
>  	help
>  	  This adds the CPUfreq driver support for ARM platforms using SCMI

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh