ARM: at91: properly initialize timer

Use clocksource_of_init to initialize the system timer instead of relying on a
custom function.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/mach-at91/at91rm9200.c

@@ -23,12 +23,6 @@ static const struct at91_soc rm9200_socs[] = {
 	{ /* sentinel */ },
 };
 
-static void __init at91rm9200_dt_timer_init(void)
-{
-	of_clk_init(NULL);
-	at91rm9200_timer_init();
-}
-
 static void __init at91rm9200_dt_device_init(void)
 {
 	struct soc_device *soc;
@@ -50,7 +44,6 @@ static const char *at91rm9200_dt_board_compat[] __initconst = {
 };
 
 DT_MACHINE_START(at91rm9200_dt, "Atmel AT91RM9200")
-	.init_time      = at91rm9200_dt_timer_init,
 	.init_machine	= at91rm9200_dt_device_init,
 	.dt_compat	= at91rm9200_dt_board_compat,
 MACHINE_END

arch/arm/mach-at91/at91rm9200_time.c

@@ -222,7 +222,7 @@ err:
 /*
  * ST (system timer) module supports both clockevents and clocksource.
  */
-void __init at91rm9200_timer_init(void)
+static void __init atmel_st_timer_init(struct device_node *node)
 {
 	/* For device tree enabled device: initialize here */
 	of_at91rm9200_st_init();
@@ -249,3 +249,5 @@ void __init at91rm9200_timer_init(void)
 	/* register clocksource */
 	clocksource_register_hz(&clk32k, AT91_SLOW_CLOCK);
 }
+CLOCKSOURCE_OF_DECLARE(atmel_st_timer, "atmel,at91rm9200-st",
+		       atmel_st_timer_init);

arch/arm/mach-at91/generic.h

@@ -18,9 +18,6 @@
 extern void __init at91_map_io(void);
 extern void __init at91_alt_map_io(void);
 
- /* Timer */
-extern void at91rm9200_timer_init(void);
-
 /* idle */
 extern void at91rm9200_idle(void);
 extern void at91sam9_idle(void);