Re: [PATCH V2 2/5] i2c: pxa: prepare/unprepare clocks

[Russell King - ARM Linux <linux@arm.linux.org.uk>]

On Mon, Nov 17, 2014 at 06:07:40PM +0300, Dmitry Eremin-Solenikov wrote:
> Change clk_enable/disable() calls to clk_prepare_enable() and
> clk_disable_unprepare().
> 
> Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
> ---
>  drivers/i2c/busses/i2c-pxa.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
> index be671f7..2e75375 100644
> --- a/drivers/i2c/busses/i2c-pxa.c
> +++ b/drivers/i2c/busses/i2c-pxa.c
> @@ -1297,7 +1297,7 @@ static int i2c_pxa_suspend_noirq(struct device *dev)
>  	struct platform_device *pdev = to_platform_device(dev);
>  	struct pxa_i2c *i2c = platform_get_drvdata(pdev);
>  
> -	clk_disable(i2c->clk);
> +	clk_disable_unprepare(i2c->clk);

Since clk_unprepare() and clk_prepare() can sleep, it is unwise to call
these with IRQs disabled - the _noirq variants of these are run with
IRQs disabled.

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