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Date: Mon, 8 Aug 2016 15:33:50 +0200 From: Alexandre Belloni <alexandre.belloni@...e-electrons.com> To: Daniel Lezcano <daniel.lezcano@...aro.org> Cc: Thomas Gleixner <tglx@...utronix.de>, Boris Brezillon <boris.brezillon@...e-electrons.com>, Nicolas Ferre <nicolas.ferre@...el.com>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Alexandre Belloni <alexandre.belloni@...e-electrons.com> Subject: [PATCH v2 1/4] clocksource: timer-atmel-pit: enable mck 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@...il.com> Reviewed-by: Boris Brezillon <boris.brezillon@...e-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@...el.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com> --- drivers/clocksource/timer-atmel-pit.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c index 1ffac0cb0cb7..db839fc99a8e 100644 --- a/drivers/clocksource/timer-atmel-pit.c +++ b/drivers/clocksource/timer-atmel-pit.c @@ -261,6 +261,9 @@ static int __init at91sam926x_pit_dt_init(struct device_node *node) return PTR_ERR(data->mck); } + if (clk_prepare_enable(data->mck)) + panic(pr_fmt("Unable to enable mck\n")); + /* Get the interrupts property */ data->irq = irq_of_parse_and_map(node, 0); if (!data->irq) { -- 2.8.1
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