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thermal: cpu cooling: allow module builds

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As thermal drivers can be built as modules and also
the thermal framework itself, building cpu cooling
only as built-in can cause linking errors. For instance:
* Generic Thermal sysfs driver
*
Generic Thermal sysfs driver (THERMAL) [M/n/y/?] m
  generic cpu cooling support (CPU_THERMAL) [N/y/?] (NEW) y

with the following drive:
CONFIG_OMAP_BANDGAP=m

generates:
ERROR: "cpufreq_cooling_unregister" [drivers/staging/omap-thermal/omap-thermal.ko] undefined!
ERROR: "cpufreq_cooling_register" [drivers/staging/omap-thermal/omap-thermal.ko] undefined!

This patch changes cpu cooling driver to allow it
to be built as module.

Reported-by: Enric Balletbo i Serra <eballetbo@gmail.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Reviewed-by: Durgadoss R <durgadoss.r@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Eduardo Valentin 2012-11-14 15:23:30 +00:00 committed by Zhang Rui
parent 3778ff5c70
commit 4ba115b1e1
2 changed files with 2 additions and 2 deletions
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2
drivers/thermal/Kconfig
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@ -67,7 +67,7 @@ config USER_SPACE
Enable this to let the user space manage the platform thermals.
config CPU_THERMAL
bool "generic cpu cooling support"
tristate "generic cpu cooling support"
depends on CPU_FREQ
select CPU_FREQ_TABLE
help

2
include/linux/cpu_cooling.h
View File

@ -29,7 +29,7 @@
#define CPUFREQ_COOLING_START 0
#define CPUFREQ_COOLING_STOP 1
#ifdef CONFIG_CPU_THERMAL
#if defined(CONFIG_CPU_THERMAL) || defined(CONFIG_CPU_THERMAL_MODULE)
/**
* cpufreq_cooling_register - function to create cpufreq cooling device.
* @clip_cpus: cpumask of cpus where the frequency constraints will happen