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authorAlexandre Belloni <alexandre.belloni@free-electrons.com>2016-08-23 10:44:02 +0200
committerDaniel Lezcano <daniel.lezcano@linaro.org>2016-08-26 15:55:58 +0200
commit699e36e5b8e9f77b2be4c23f0b309e53be4b2880 (patch)
treedd8cd0a7de48e32b85e5a996ad11aca0109a540f
parentaa8c0f1ad7e862147f4efb32bbb71ff66eb38caa (diff)
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clocksource/drivers/timer-atmel-pit: Enable mck clock
mck is needed to get the PIT working. Explicitly prepare_enable it instead of assuming it is enabled. This solves an issue where the system is freezing when the ETM/ETB drivers are enabled. Reported-by: Olivier Schonken <olivier.schonken@gmail.com> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
-rw-r--r--drivers/clocksource/timer-atmel-pit.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c
index 1ffac0cb0cb7..3494bc5a21d5 100644
--- a/drivers/clocksource/timer-atmel-pit.c
+++ b/drivers/clocksource/timer-atmel-pit.c
@@ -261,6 +261,12 @@ static int __init at91sam926x_pit_dt_init(struct device_node *node)
return PTR_ERR(data->mck);
}
+ ret = clk_prepare_enable(data->mck);
+ if (ret) {
+ pr_err("Unable to enable mck\n");
+ return ret;
+ }
+
/* Get the interrupts property */
data->irq = irq_of_parse_and_map(node, 0);
if (!data->irq) {