1 files changed, 13 insertions, 5 deletions

diff --git a/arch/arm/mach-tegra/timer.c b/arch/arm/mach-tegra/timer.c
index 732c724008b1..1d1acda4f3e0 100644
--- a/arch/arm/mach-tegra/timer.c
+++ b/arch/arm/mach-tegra/timer.c
@@ -165,20 +165,28 @@ static struct irqaction tegra_timer_irq = {
 static void __init tegra_init_timer(void)
 {
         struct clk *clk;
-        unsigned long rate = clk_measure_input_freq();
+        unsigned long rate;
         int ret;
 
         clk = clk_get_sys("timer", NULL);
-        BUG_ON(IS_ERR(clk));
-        clk_enable(clk);
+        if (IS_ERR(clk)) {
+                pr_warn("Unable to get timer clock."
+                        " Assuming 12Mhz input clock.\n");
+                rate = 12000000;
+        } else {
+                clk_enable(clk);
+                rate = clk_get_rate(clk);
+        }
 
         /*
          * rtc registers are used by read_persistent_clock, keep the rtc clock
          * enabled
          */
         clk = clk_get_sys("rtc-tegra", NULL);
-        BUG_ON(IS_ERR(clk));
-        clk_enable(clk);
+        if (IS_ERR(clk))
+                pr_warn("Unable to get rtc-tegra clock\n");
+        else
+                clk_enable(clk);
 
 #ifdef CONFIG_HAVE_ARM_TWD
         twd_base = IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x600);