Re: [PATCH 1/2] GPIO: Add driver for Zynq GPIO controller

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On Mon, 2014-03-31 at 11:23AM +0200, Ulf Hansson wrote:
> On 27 March 2014 16:25, Harini Katakam <harinik@xxxxxxxxxx> wrote:
[...]
> > +static int __maybe_unused zynq_gpio_runtime_suspend(struct device *dev)
> > +{
> > +       struct platform_device *pdev = to_platform_device(dev);
> > +       struct zynq_gpio *gpio = platform_get_drvdata(pdev);
> > +
> > +       clk_disable(gpio->clk);
> 
> You should be able can use clk_disable_unprepare() here.
> 
> > +
> > +       return 0;
> > +}
> > +
> > +static int __maybe_unused zynq_gpio_runtime_resume(struct device *dev)
> > +{
> > +       struct platform_device *pdev = to_platform_device(dev);
> > +       struct zynq_gpio *gpio = platform_get_drvdata(pdev);
> > +
> > +       return clk_enable(gpio->clk);
> 
> You should be able can use clk_prepare_enable() here.

Is there some common practice regarding this? As I understand it, we
want to ensure the clock to be gated during suspend, which should happen
with clk_disable(). Why would we also unprepare the clock? We are highly
likely to use it again once we resume.

	Thanks,
	Sören


--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux