ARC: clockevent: Prepare for DT based probe

 - call clocksource_probe()
 - This in turns needs of_clk_init() to be called earlier

Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Noam Camus <noamc@ezchip.com>
[vgupta: broken off from a bigger patch]
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

arch/arc/Kconfig

@@ -10,8 +10,9 @@ config ARC
 	def_bool y
 	select ARCH_SUPPORTS_ATOMIC_RMW if ARC_HAS_LLSC
 	select BUILDTIME_EXTABLE_SORT
-	select COMMON_CLK
+	select CLKSRC_OF
 	select CLONE_BACKWARDS
+	select COMMON_CLK
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_FIND_FIRST_BIT

arch/arc/kernel/setup.c

@@ -13,7 +13,6 @@
 #include <linux/console.h>
 #include <linux/module.h>
 #include <linux/cpu.h>
-#include <linux/clk-provider.h>
 #include <linux/of_fdt.h>
 #include <linux/of_platform.h>
 #include <linux/cache.h>
@@ -444,7 +443,6 @@ void __init setup_arch(char **cmdline_p)
 
 static int __init customize_machine(void)
 {
-	of_clk_init(NULL);
 	/*
 	 * Traverses flattened DeviceTree - registering platform devices
 	 * (if any) complete with their resources

arch/arc/kernel/time.c

@@ -34,6 +34,8 @@
 #include <linux/kernel.h>
 #include <linux/time.h>
 #include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
 #include <linux/clocksource.h>
 #include <linux/clockchips.h>
 #include <linux/cpu.h>
@@ -301,6 +303,9 @@ static void __init arc_clockevent_setup(void)
  */
 void __init time_init(void)
 {
+	of_clk_init(NULL);
+	clocksource_probe();
+
 	/*
 	 * sets up the timekeeping free-flowing counter which also returns
 	 * whether the counter is usable as clocksource