Re: [PATCH v6 01/11] drivers: usb: otg: add a new driver for omap usb2 phy

[Felipe Balbi <balbi@ti.com>]

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On Mon, Aug 06, 2012 at 03:14:42PM +0530, ABRAHAM, KISHON VIJAY wrote:
> >> >> +static int omap_usb2_runtime_resume(struct device *dev)
> >> >> +{
> >> >> +     u32 ret = 0;
> >> >> +     struct platform_device  *pdev = to_platform_device(dev);
> >> >> +     struct omap_usb *phy = platform_get_drvdata(pdev);
> >> >> +
> >> >> +     ret = clk_enable(phy->wkupclk);
> >> >> +     if (ret < 0)
> >> >> +             dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
> >> >> +
> >> >> +     return ret;
> >> >> +}
> >> >> +
> >> >> +static const struct dev_pm_ops omap_usb2_pm_ops = {
> >> >> +     SET_RUNTIME_PM_OPS(omap_usb2_runtime_suspend, omap_usb2_runtime_resume,
> >> >> +             NULL)
> >> >
> >> > only runtime ? What about static suspend ? We need this to work also
> >> > after a traditional echo mem > /sys/power/state ;-)
> >>
> >> The static suspend case is handled by users of this phy using
> >> set_suspend hooks.
> >
> > I'm not sure if that's too wise, what if your user enabled USB, but
> > for whatever reason loaded only the phy driver and not musb or dwc3. It
> > will fail, right ?
> 
> The enabling and disabling of phy is solely governed by usb controller
> driver (musb/dwc3). So if you dont have musb/dwc3 loaded, the phy will
> be for sure disabled.

fair enough... that's ok then ;-)

-- 
balbi

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