From mboxrd@z Thu Jan 1 00:00:00 1970 From: nicolas.ferre@atmel.com (Nicolas Ferre) Date: Tue, 5 Jul 2016 09:47:43 +0200 Subject: [PATCH] clocksource: timer-atmel-pit: enable mck In-Reply-To: <20160704222404.5132c3d3@bbrezillon> References: <1467648009-24269-1-git-send-email-alexandre.belloni@free-electrons.com> <20160704222404.5132c3d3@bbrezillon> Message-ID: <577B661F.5090703@atmel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Le 04/07/2016 22:24, Boris Brezillon a ?crit : > On Mon, 4 Jul 2016 18:00:09 +0200 > Alexandre Belloni wrote: > >> 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 > > ^ where > >> are enabled. >> >> Reported-by: Olivier Schonken >> Signed-off-by: Alexandre Belloni > > Reviewed-by: Boris Brezillon Acked-by: Nicolas Ferre >> --- >> 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) > > -- Nicolas Ferre