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| author | Amit Kucheria <amit.kucheria@linaro.org> | 2019-01-29 07:55:07 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-01-29 13:46:31 +0300 |
| commit | afa1f2ab43d48d0e1fa1bda524a0cf53e4cd6c87 (patch) | |
| tree | 5b2e70efe058376f7d3a50c3c4b83b27e273d00f /drivers/thermal/Kconfig | |
| parent | 625c85a62cb7d3c79f6e16de3cfa972033658250 (diff) | |
| download | linux-afa1f2ab43d48d0e1fa1bda524a0cf53e4cd6c87.tar.xz | |
thermal: cpu_cooling: Require thermal core to be compiled in
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.
As a result of this change, get rid of the ugly (!CPU_THERMAL ||
THERMAL) dependency in all cpufreq drivers using CPU_THERMAL.
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/thermal/Kconfig')
| -rw-r--r-- | drivers/thermal/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
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 |