soc: samsung: exynos-pmu: Fix compilation when nothing selects CONFIG_MFD_CORE

BugLink: https://bugs.launchpad.net/bugs/1951822
commit e37ef6dcdb1f4738b01cec7fb7be46af07816af9 upstream.

Commit 93618e344a5e ("soc: samsung: exynos-pmu: instantiate clkout
driver as MFD") adds a "devm_mfd_add_devices" call in the exynos-pmu
driver which depends on CONFIG_MFD_CORE. If no driver selects that
config, the build will fail if CONFIG_EXYNOS_PMU is enabled with the
following error:

  drivers/soc/samsung/exynos-pmu.c:137: undefined reference to `devm_mfd_add_devices'

Fix this by making CONFIG_EXYNOS_PMU select CONFIG_MFD_CORE.

Fixes: 93618e344a5e ("soc: samsung: exynos-pmu: instantiate clkout driver as MFD")
Cc: <stable@vger.kernel.org>
Signed-off-by: David Virag <virag.david003@gmail.com>
Link: https://lore.kernel.org/r/20210909222812.108614-1-virag.david003@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig
index 5745d7e5908e91307a8dca63e9790d2ebf32b2f3..1f643c0f5c93f0ad033553f15e9af13f33a275a3 100644 (file)
--- a/drivers/soc/samsung/Kconfig
+++ b/drivers/soc/samsung/Kconfig
@@ -25,6 +25,7 @@ config EXYNOS_PMU
        bool "Exynos PMU controller driver" if COMPILE_TEST
        depends on ARCH_EXYNOS || ((ARM || ARM64) && COMPILE_TEST)
        select EXYNOS_PMU_ARM_DRIVERS if ARM && ARCH_EXYNOS
+       select MFD_CORE
 
 # There is no need to enable these drivers for ARMv8
 config EXYNOS_PMU_ARM_DRIVERS