microblaze: timer: Do not initialized system timer twice

Only one system timer can be setup.
Do not initialize more system timers.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c
index 06609e0..fb0c614 100644 (file)
--- a/arch/microblaze/kernel/timer.c
+++ b/arch/microblaze/kernel/timer.c
@@ -230,9 +230,15 @@ static int __init xilinx_clocksource_init(void)
 static void __init xilinx_timer_init(struct device_node *timer)
 {
        struct clk *clk;
+       static int initialized;
        u32 irq;
        u32 timer_num = 1;
 
+       if (initialized)
+               return;
+
+       initialized = 1;
+
        timer_baseaddr = of_iomap(timer, 0);
        if (!timer_baseaddr) {
                pr_err("ERROR: invalid timer base address\n");