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thermal: cpu cooling: allow module builds
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>
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@ -67,7 +67,7 @@ config USER_SPACE
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Enable this to let the user space manage the platform thermals.
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config CPU_THERMAL
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bool "generic cpu cooling support"
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tristate "generic cpu cooling support"
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depends on CPU_FREQ
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select CPU_FREQ_TABLE
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help
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@ -29,7 +29,7 @@
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#define CPUFREQ_COOLING_START 0
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#define CPUFREQ_COOLING_STOP 1
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#ifdef CONFIG_CPU_THERMAL
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#if defined(CONFIG_CPU_THERMAL) || defined(CONFIG_CPU_THERMAL_MODULE)
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/**
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* cpufreq_cooling_register - function to create cpufreq cooling device.
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* @clip_cpus: cpumask of cpus where the frequency constraints will happen
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