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cpufreq: exynos: allow modular build 

The exynos cpufreq driver code recently gained a dependency on the
cooling code, which may be a loadable module. This breaks an ARM
allmodconfig build:

drivers/built-in.o: In function `exynos_cpufreq_probe':
:(.text+0x1748e8): undefined reference to `of_cpufreq_cooling_register'

To avoid this problem, change cpufreq Kconfig to allow the drivers
to be loadable modules as well and enforce a dependency on the
thermal module.

This change, in order to allow module builds on this cpufreq
driver, properly constructs the driver into a single module,
instead of several modules. The change also keeps the proper
platform dependency, and therefore, it wont load in platforms
that are not supposed to be loaded. The user will be able to
build the support for all platforms, or select which platforms
(s)he wants (as originally), except that now it can be a module,
instead.

Besides, it will still keep the driver only on those configs
that expect it to be on. And it won't compile/load on platforms
that it is not supposed to. It brings the config ARM_EXYNOS_CPU_FREQ_BOOST_SW
closer to this driver, so it looks better in the menuconfig.

We intentionally change ARM_EXYNOS5440_CPUFREQ to be tristate too, to
avoid future troubles.

Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-pm@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org
Fixes: e725d26c48 ("cpufreq: exynos: Use device tree to determine if cpufreq cooling should be registered")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This commit is contained in:
Arnd Bergmann 2015-01-31 14:35:18 -04:00 committed by Eduardo Valentin
parent 252454f5cb
commit 8b2b4a4e53
2 changed files with 31 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
drivers/cpufreq/Kconfig.arm
View File

@ -26,13 +26,21 @@ config ARM_VEXPRESS_SPC_CPUFREQ
config ARM_EXYNOS_CPUFREQ
bool
tristate "SAMSUNG EXYNOS CPUfreq Driver"
depends on CPU_EXYNOS4210 || SOC_EXYNOS4212 || SOC_EXYNOS4412 || SOC_EXYNOS5250
depends on THERMAL
help
This adds the CPUFreq driver for Samsung EXYNOS platforms.
Supported SoC versions are:
Exynos4210, Exynos4212, Exynos4412, and Exynos5250.
If in doubt, say N.
config ARM_EXYNOS4210_CPUFREQ
bool "SAMSUNG EXYNOS4210"
depends on CPU_EXYNOS4210
depends on ARM_EXYNOS_CPUFREQ
default y
select ARM_EXYNOS_CPUFREQ
help
This adds the CPUFreq driver for Samsung EXYNOS4210
SoC (S5PV310 or S5PC210).
@ -42,8 +50,8 @@ config ARM_EXYNOS4210_CPUFREQ
config ARM_EXYNOS4X12_CPUFREQ
bool "SAMSUNG EXYNOS4x12"
depends on SOC_EXYNOS4212 || SOC_EXYNOS4412
depends on ARM_EXYNOS_CPUFREQ
default y
select ARM_EXYNOS_CPUFREQ
help
This adds the CPUFreq driver for Samsung EXYNOS4X12
SoC (EXYNOS4212 or EXYNOS4412).
@ -53,28 +61,14 @@ config ARM_EXYNOS4X12_CPUFREQ
config ARM_EXYNOS5250_CPUFREQ
bool "SAMSUNG EXYNOS5250"
depends on SOC_EXYNOS5250
depends on ARM_EXYNOS_CPUFREQ
default y
select ARM_EXYNOS_CPUFREQ
help
This adds the CPUFreq driver for Samsung EXYNOS5250
SoC.
If in doubt, say N.
config ARM_EXYNOS5440_CPUFREQ
bool "SAMSUNG EXYNOS5440"
depends on SOC_EXYNOS5440
depends on HAVE_CLK && OF
select PM_OPP
default y
help
This adds the CPUFreq driver for Samsung EXYNOS5440
SoC. The nature of exynos5440 clock controller is
different than previous exynos controllers so not using
the common exynos framework.
If in doubt, say N.
config ARM_EXYNOS_CPU_FREQ_BOOST_SW
bool "EXYNOS Frequency Overclocking - Software"
depends on ARM_EXYNOS_CPUFREQ && THERMAL
@ -90,6 +84,20 @@ config ARM_EXYNOS_CPU_FREQ_BOOST_SW
If in doubt, say N.
config ARM_EXYNOS5440_CPUFREQ
tristate "SAMSUNG EXYNOS5440"
depends on SOC_EXYNOS5440
depends on HAVE_CLK && OF
select PM_OPP
default y
help
This adds the CPUFreq driver for Samsung EXYNOS5440
SoC. The nature of exynos5440 clock controller is
different than previous exynos controllers so not using
the common exynos framework.
If in doubt, say N.
config ARM_HIGHBANK_CPUFREQ
tristate "Calxeda Highbank-based"
depends on ARCH_HIGHBANK && CPUFREQ_DT && REGULATOR

9
drivers/cpufreq/Makefile
View File

@ -51,10 +51,11 @@ obj-$(CONFIG_ARM_DT_BL_CPUFREQ) += arm_big_little_dt.o
obj-$(CONFIG_ARCH_DAVINCI) += davinci-cpufreq.o
obj-$(CONFIG_UX500_SOC_DB8500) += dbx500-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS_CPUFREQ) += exynos-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS4210_CPUFREQ) += exynos4210-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS4X12_CPUFREQ) += exynos4x12-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS5250_CPUFREQ) += exynos5250-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS_CPUFREQ) += arm-exynos-cpufreq.o
arm-exynos-cpufreq-y := exynos-cpufreq.o
arm-exynos-cpufreq-$(CONFIG_ARM_EXYNOS4210_CPUFREQ) += exynos4210-cpufreq.o
arm-exynos-cpufreq-$(CONFIG_ARM_EXYNOS4X12_CPUFREQ) += exynos4x12-cpufreq.o
arm-exynos-cpufreq-$(CONFIG_ARM_EXYNOS5250_CPUFREQ) += exynos5250-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS5440_CPUFREQ) += exynos5440-cpufreq.o
obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o
obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o