• Arnd Bergmann's avatar
    cpufreq: exynos: allow modular build · 8b2b4a4e
    Arnd Bergmann authored
    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: e725d26c ("cpufreq: exynos: Use device tree to determine if cpufreq cooling should be registered")
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
    8b2b4a4e
Kconfig.arm 6.74 KB