On 21-01-19, 21:10, Amit Kucheria wrote:
> The CPU cooling driver (cpu_cooling.c) allows the platform's cpufreq
> driver to register as a cooling device and cool down the platform by
> throttling the CPU frequency. In order to be able to auto-register a
> cpufreq driver as a cooling device from the cpufreq core, we need access
> to code inside cpu_cooling.c which, in turn, accesses code inside
> thermal core.
>
> CPU_FREQ is a bool while THERMAL is tristate. In some configurations
> (e.g. allmodconfig), CONFIG_THERMAL ends up as a module while
> CONFIG_CPU_FREQ is compiled in. This leads to following error:
>
> drivers/cpufreq/cpufreq.o: In function `cpufreq_offline':
> cpufreq.c:(.text+0x407c): undefined reference to `cpufreq_cooling_unregister'
> drivers/cpufreq/cpufreq.o: In function `cpufreq_online':
> cpufreq.c:(.text+0x70c0): undefined reference to `of_cpufreq_cooling_register'
>
> Given that platforms using CPU_THERMAL usually want it compiled-in so it
> is available early in boot, make CPU_THERMAL depend on THERMAL being
> compiled-in instead of allowing it to be a module.
>
> Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Signed-off-by: Amit Kucheria <amit.kucheria@xxxxxxxxxx>
> ---
> drivers/thermal/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> index 30323426902e..58bb7d72dc2b 100644
> --- a/drivers/thermal/Kconfig
> +++ b/drivers/thermal/Kconfig
> @@ -152,6 +152,7 @@ config CPU_THERMAL
> bool "generic cpu cooling support"
> depends on CPU_FREQ
> depends on THERMAL_OF
> + depends on THERMAL=y
> help
> This implements the generic cpu cooling mechanism through frequency
> reduction. An ACPI version of this already exists
Please remove all Kconfig crap, which gets fixed with this, as well in
this patch itself. Like:
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 10bc5c798d17..40f8cc323996 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -40,8 +40,6 @@ config ARM_ARMADA_8K_CPUFREQ
config ARM_BIG_LITTLE_CPUFREQ
tristate "Generic ARM big LITTLE CPUfreq driver"
depends on ARM_CPU_TOPOLOGY && HAVE_CLK
- # if CPU_THERMAL is on and THERMAL=m, ARM_BIT_LITTLE_CPUFREQ cannot be =y
- depends on !CPU_THERMAL || THERMAL
select PM_OPP
help
This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
--
viresh
