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

[Boris Brezillon]

On Mon,  4 Jul 2016 18:00:09 +0200
Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx> 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 <olivier.schonken@xxxxxxxxx>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>

Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>

> ---
>  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)