[PATCH 2/2] cpufreq: mediatek: allow building as a module

[PATCH 2/2] cpufreq: mediatek: allow building as a module

[Arnd Bergmann]

The MT8173 cpufreq driver can currently only be built-in, but
it has a Kconfig dependency on the thermal core. THERMAL
can be a loadable module, which in turn makes this driver
impossible to build.

It is nicer to make the cpufreq driver a module as well, so
this patch turns the option in to a 'tristate' and adapts
the dependency accordingly.

The driver has no module_exit() function, so it will continue
to not support unloading, but it can be built as a module
and loaded at runtime now.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 5269e7067cd6 ("cpufreq: Add ARM_MT8173_CPUFREQ dependency on THERMAL")
---
 drivers/cpufreq/Kconfig.arm      | 4 ++--
 drivers/cpufreq/mt8173-cpufreq.c | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 0031069b64c9..14b1f9393b05 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -84,10 +84,10 @@ config ARM_KIRKWOOD_CPUFREQ
 	  SoCs.
 
 config ARM_MT8173_CPUFREQ
-	bool "Mediatek MT8173 CPUFreq support"
+	tristate "Mediatek MT8173 CPUFreq support"
 	depends on ARCH_MEDIATEK && REGULATOR
 	depends on ARM64 || (ARM_CPU_TOPOLOGY && COMPILE_TEST)
-	depends on !CPU_THERMAL || THERMAL=y
+	depends on !CPU_THERMAL || THERMAL
 	select PM_OPP
 	help
 	  This adds the CPUFreq driver support for Mediatek MT8173 SoC.
diff --git a/drivers/cpufreq/mt8173-cpufreq.c b/drivers/cpufreq/mt8173-cpufreq.c
index 1efba340456d..2058e6d292ce 100644
--- a/drivers/cpufreq/mt8173-cpufreq.c
+++ b/drivers/cpufreq/mt8173-cpufreq.c
@@ -17,6 +17,7 @@
 #include <linux/cpu_cooling.h>
 #include <linux/cpufreq.h>
 #include <linux/cpumask.h>
+#include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_opp.h>
-- 
2.7.0

Re: [PATCH 2/2] cpufreq: mediatek: allow building as a module

[Matthias Brugger]

On 29/02/16 17:04, Arnd Bergmann wrote:
> The MT8173 cpufreq driver can currently only be built-in, but
> it has a Kconfig dependency on the thermal core. THERMAL
> can be a loadable module, which in turn makes this driver
> impossible to build.
>
> It is nicer to make the cpufreq driver a module as well, so
> this patch turns the option in to a 'tristate' and adapts
> the dependency accordingly.
>
> The driver has no module_exit() function, so it will continue
> to not support unloading, but it can be built as a module
> and loaded at runtime now.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Fixes: 5269e7067cd6 ("cpufreq: Add ARM_MT8173_CPUFREQ dependency on THERMAL")
> ---

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

>   drivers/cpufreq/Kconfig.arm      | 4 ++--
>   drivers/cpufreq/mt8173-cpufreq.c | 1 +
>   2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
> index 0031069b64c9..14b1f9393b05 100644
> --- a/drivers/cpufreq/Kconfig.arm
> +++ b/drivers/cpufreq/Kconfig.arm
> @@ -84,10 +84,10 @@ config ARM_KIRKWOOD_CPUFREQ
>   	  SoCs.
>
>   config ARM_MT8173_CPUFREQ
> -	bool "Mediatek MT8173 CPUFreq support"
> +	tristate "Mediatek MT8173 CPUFreq support"
>   	depends on ARCH_MEDIATEK && REGULATOR
>   	depends on ARM64 || (ARM_CPU_TOPOLOGY && COMPILE_TEST)
> -	depends on !CPU_THERMAL || THERMAL=y
> +	depends on !CPU_THERMAL || THERMAL
>   	select PM_OPP
>   	help
>   	  This adds the CPUFreq driver support for Mediatek MT8173 SoC.
> diff --git a/drivers/cpufreq/mt8173-cpufreq.c b/drivers/cpufreq/mt8173-cpufreq.c
> index 1efba340456d..2058e6d292ce 100644
> --- a/drivers/cpufreq/mt8173-cpufreq.c
> +++ b/drivers/cpufreq/mt8173-cpufreq.c
> @@ -17,6 +17,7 @@
>   #include <linux/cpu_cooling.h>
>   #include <linux/cpufreq.h>
>   #include <linux/cpumask.h>
> +#include <linux/module.h>
>   #include <linux/of.h>
>   #include <linux/platform_device.h>
>   #include <linux/pm_opp.h>
>