clocksource/drivers/owl: Improve owl_timer_init fail messages

Check the return from clocksource_mmio_init, add messages in case of
an error and in case of not having a defined clock property.

Signed-off-by: Matheus Castello <matheus@castello.eng.br>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200219004810.411190-1-matheus@castello.eng.br

diff --git a/drivers/clocksource/timer-owl.c b/drivers/clocksource/timer-owl.c
index 900fe73..ac97420 100644 (file)
--- a/drivers/clocksource/timer-owl.c
+++ b/drivers/clocksource/timer-owl.c
@@ -135,8 +135,11 @@ static int __init owl_timer_init(struct device_node *node)
        }
 
        clk = of_clk_get(node, 0);
-       if (IS_ERR(clk))
-               return PTR_ERR(clk);
+       if (IS_ERR(clk)) {
+               ret = PTR_ERR(clk);
+               pr_err("Failed to get clock for clocksource (%d)\n", ret);
+               return ret;
+       }
 
        rate = clk_get_rate(clk);
 
@@ -144,8 +147,12 @@ static int __init owl_timer_init(struct device_node *node)
        owl_timer_set_enabled(owl_clksrc_base, true);
 
        sched_clock_register(owl_timer_sched_read, 32, rate);
-       clocksource_mmio_init(owl_clksrc_base + OWL_Tx_VAL, node->name,
-                             rate, 200, 32, clocksource_mmio_readl_up);
+       ret = clocksource_mmio_init(owl_clksrc_base + OWL_Tx_VAL, node->name,
+                                   rate, 200, 32, clocksource_mmio_readl_up);
+       if (ret) {
+               pr_err("Failed to register clocksource (%d)\n", ret);
+               return ret;
+       }
 
        owl_timer_reset(owl_clkevt_base);