Bootloader might use RTC hardware and leave it in the enabled state. Ensure that the potentially enabled periodic tick interrupts are disabled before enabling the driver, because they might cause lockup if tick interrupt happens after disabling RTC gate clock. Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> --- drivers/rtc/rtc-s3c.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index 24a41909f049..16a326e95d46 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -503,6 +503,10 @@ static int s3c_rtc_probe(struct platform_device *pdev) goto err_src_clk; } + /* disable RTC enable bits potentially set by the bootloader */ + if (info->data->disable) + info->data->disable(info); + /* check to see if everything is setup correctly */ if (info->data->enable) info->data->enable(info); -- 2.17.1
