[PATCH] clocksource: timer-atmel-pit: enable mck

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From	Alexandre Belloni <alexandre.belloni@free-electrons.com>
Newsgroups	linux.kernel
Subject	[PATCH] clocksource: timer-atmel-pit: enable mck
Date	Mon, 04 Jul 2016 18:10:02 +0200
Message-ID	<rReBA-7LK-19@gated-at.bofh.it> (permalink)
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X-Original-Cc	Thomas Gleixner <tglx@linutronix.de>, Boris Brezillon <boris.brezillon@free-electrons.com>, Nicolas Ferre <nicolas.ferre@atmel.com>, Olivier Schonken <olivier.schonken@gmail.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Alexandre Belloni <alexandre.belloni@free-electrons.com>
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mck is needed to get the PIT working. Explicitly prepare_enable it instead
of assuming it is enabled.

This solves an issue were the system is freezing when the ETM/ETB drivers
are enabled.

Reported-by: Olivier Schonken <olivier.schonken@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-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 d911c5dca8f1..fcc97711cd79 100644
--- a/drivers/clocksource/timer-atmel-pit.c
+++ b/drivers/clocksource/timer-atmel-pit.c
@@ -248,6 +248,9 @@ static void __init at91sam926x_pit_dt_init(struct device_node *node)
 	if (IS_ERR(data->mck))
 		panic(pr_fmt("Unable to get mck clk\n"));
 
+	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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[PATCH] clocksource: timer-atmel-pit: enable mck Alexandre Belloni <alexandre.belloni@free-electrons.com> - 2016-07-04 18:10 +0200
  Re: [PATCH] clocksource: timer-atmel-pit: enable mck Boris Brezillon <boris.brezillon@free-electrons.com> - 2016-07-04 22:30 +0200
    Re: [PATCH] clocksource: timer-atmel-pit: enable mck Nicolas Ferre <nicolas.ferre@atmel.com> - 2016-07-05 09:50 +0200

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