From mboxrd@z Thu Jan 1 00:00:00 1970 From: daniel.lezcano@linaro.org (Daniel Lezcano) Date: Fri, 26 Aug 2016 16:20:43 +0200 Subject: [PATCH 1/3] clocksource/drivers/timer-atmel-pit: Enable mck clock In-Reply-To: <57C05026.7010905@linaro.org> References: <57C05026.7010905@linaro.org> Message-ID: <1472221245-14265-1-git-send-email-daniel.lezcano@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Alexandre Belloni 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 Reviewed-by: Boris Brezillon Acked-by: Nicolas Ferre Signed-off-by: Alexandre Belloni Signed-off-by: Daniel Lezcano --- drivers/clocksource/timer-atmel-pit.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c index 1ffac0c..3494bc5 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) { -- 1.9.1