clocksource/drivers/u300: Add the COMPILE_TEST option

Change the Kconfig option logic to fullfil with the current approach.

A new Kconfig option is added, CONFIG_U300_TIMER and is selected by the
platform. Then the clocksource's Kconfig is changed to make this option
selectable by the user if the COMPILE_TEST option is set. Otherwise, it is
up to the platform's Kconfig to select the timer.

Due on the delay specific code, this driver will compile only on the ARM
architecture.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

3 files changed, 10 insertions, 2 deletions

diff --git a/arch/arm/mach-u300/Kconfig b/arch/arm/mach-u300/Kconfig
index 301a98498453..4fdc3425ffbd 100644
--- a/arch/arm/mach-u300/Kconfig
+++ b/arch/arm/mach-u300/Kconfig
@@ -4,7 +4,7 @@ menuconfig ARCH_U300
         select ARCH_REQUIRE_GPIOLIB
         select ARM_AMBA
         select ARM_VIC
-        select CLKSRC_MMIO
+        select U300_TIMER
         select CPU_ARM926T
         select HAVE_TCM
         select PINCTRL
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index c350fbd805d7..d425f80b1e42 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -191,6 +191,14 @@ config PRIMA2_TIMER
         help
           Enables support for the Prima2 timer.
 
+config U300_TIMER
+        bool "U300 timer driver" if COMPILE_TEST
+        depends on GENERIC_CLOCKEVENTS
+        depends on ARM
+        select CLKSRC_MMIO
+        help
+          Enables support for the U300 timer.
+
 config CLKSRC_DBX500_PRCMU_SCHED_CLOCK
         bool "Clocksource PRCMU Timer sched_clock"
         depends on (CLKSRC_DBX500_PRCMU && !CLKSRC_NOMADIK_MTU_SCHED_CLOCK)
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index b419d5da11c7..adbc3a8082d0 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -26,7 +26,7 @@ obj-$(CONFIG_MOXART_TIMER)	+= moxart_timer.o
 obj-$(CONFIG_MXS_TIMER)         += mxs_timer.o
 obj-$(CONFIG_CLKSRC_PXA)        += pxa_timer.o
 obj-$(CONFIG_PRIMA2_TIMER)      += timer-prima2.o
-obj-$(CONFIG_ARCH_U300)         += timer-u300.o
+obj-$(CONFIG_U300_TIMER)        += timer-u300.o
 obj-$(CONFIG_SUN4I_TIMER)       += sun4i_timer.o
 obj-$(CONFIG_SUN5I_HSTIMER)     += timer-sun5i.o
 obj-$(CONFIG_MESON6_TIMER)      += meson6_timer.o