Hi Bjorn, On Thu, Feb 20, 2014 at 04:38:10PM -0800, Bjorn Andersson wrote: > +static int qup_i2c_probe(struct platform_device *pdev) > +{ [ snip ] > + > + qup_i2c_enable_clocks(qup); > + [ snip ] > + > + pm_runtime_set_autosuspend_delay(qup->dev, MSEC_PER_SEC); > + pm_runtime_use_autosuspend(qup->dev); > + pm_runtime_enable(qup->dev); Since the device is already woken up, you probably need to call pm_runtime_set_active here. Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com