ARM: at91/pit: add traces in case of error

Traces related to IRQ management are useful for timers in case of
non-working IRQ subsystem (switch to irq_domain for instance).

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

diff --git a/arch/arm/mach-at91/at91sam926x_time.c b/arch/arm/mach-at91/at91sam926x_time.c
index 5d71476..a94758b 100644 (file)
--- a/arch/arm/mach-at91/at91sam926x_time.c
+++ b/arch/arm/mach-at91/at91sam926x_time.c
@@ -174,8 +174,10 @@ static int __init of_at91sam926x_pit_init(void)
 
        /* Get the interrupts property */
        ret = irq_of_parse_and_map(np, 0);
-       if (!ret)
+       if (!ret) {
+               pr_crit("AT91: PIT: Unable to get IRQ from DT\n");
                goto ioremap_err;
+       }
        at91sam926x_pit_irq.irq = ret;
 
        of_node_put(np);
@@ -203,6 +205,7 @@ static void __init at91sam926x_pit_init(void)
 {
        unsigned long   pit_rate;
        unsigned        bits;
+       int             ret;
 
        /* For device tree enabled device: initialize here */
        of_at91sam926x_pit_init();
@@ -227,7 +230,9 @@ static void __init at91sam926x_pit_init(void)
        clocksource_register_hz(&pit_clk, pit_rate);
 
        /* Set up irq handler */
-       setup_irq(at91sam926x_pit_irq.irq, &at91sam926x_pit_irq);
+       ret = setup_irq(at91sam926x_pit_irq.irq, &at91sam926x_pit_irq);
+       if (ret)
+               pr_crit("AT91: PIT: Unable to setup IRQ\n");
 
        /* Set up and register clockevents */
        pit_clkevt.mult = div_sc(pit_rate, NSEC_PER_SEC, pit_clkevt.shift);