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Subject[PATCH 4/8] thermal/drivers/Kconfig: Convert the CPU cooling device to a choice
Date
The next changes will add new way to cool down a CPU. In order to
sanitize and make the overall cpu cooling code consistent and robust
we must prevent the cpu cooling devices to co-exists with the same
purpose at the same time in the kernel.

Make the CPU cooling device a choice in the Kconfig, so only one CPU
cooling strategy can be chosen.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
drivers/thermal/Kconfig | 20 +++++++++++++++++---
1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
index 315ae29..925e73b 100644
--- a/drivers/thermal/Kconfig
+++ b/drivers/thermal/Kconfig
@@ -142,17 +142,31 @@ config THERMAL_GOV_POWER_ALLOCATOR
allocating and limiting power to devices.

config CPU_THERMAL
- bool "generic cpu cooling support"
- depends on CPU_FREQ
+ bool "Generic cpu cooling support"
depends on THERMAL_OF
help
+ Enable the CPU cooling features. If the system has no active
+ cooling device available, this option allows to use the CPU
+ as a cooling device.
+
+choice
+ prompt "CPU cooling strategies"
+ depends on CPU_THERMAL
+ default CPU_FREQ_THERMAL
+ help
+ Select the CPU cooling strategy.
+
+config CPU_FREQ_THERMAL
+ bool "CPU frequency cooling strategy"
+ depends on CPU_FREQ
+ help
This implements the generic cpu cooling mechanism through frequency
reduction. An ACPI version of this already exists
(drivers/acpi/processor_thermal.c).
This will be useful for platforms using the generic thermal interface
and not the ACPI interface.

- If you want this support, you should say Y here.
+endchoice

config CLOCK_THERMAL
bool "Generic clock cooling support"
--
2.7.4
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