Hi,
On 15/12/2017 at 12:44:49 +0100, Enric Balletbo Serra wrote:
> Hi,
>
> 2017-08-24 12:30 GMT+02:00 Enric Balletbo i Serra
> <enric.balletbo@xxxxxxxxxxxxx>:
> > On some systems the nIRQ pin is often connect to a GPIO, then, if a given
> > interrupt line is supposed to wake up the system, the corresponding input
> > of that interrupt controller need to be enabled to receive signal from the
> > line in question. Before this commit such systems would not wake up
> > because are not marked as wakeup IRQs in the IRQ subsystem.
> >
> > This commit calls enable_irq_wake() on suspend and disables that input to
> > prevent the dedicated controller from triggering interrupts unnecessarily
> > after wakeup.
> >
> > After this commit a system composed by a RTC DS1339 chip connected to a
> > GPIO line on a AM335x SoC is able to wakeup from suspend-to-RAM, otherwise
> > the line is ignored.
> >
> > Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
> > ---
> > drivers/rtc/rtc-ds1307.c | 25 +++++++++++++++++++++++++
> > 1 file changed, 25 insertions(+)
> >
> > diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
> > index 4b43aa6..c4b0f6a 100644
> > --- a/drivers/rtc/rtc-ds1307.c
> > +++ b/drivers/rtc/rtc-ds1307.c
> > @@ -1711,11 +1711,36 @@ static int ds1307_probe(struct i2c_client *client,
> > return err;
> > }
> >
> > +#ifdef CONFIG_PM_SLEEP
> > +static int ds1307_suspend(struct device *dev)
> > +{
> > + struct ds1307 *ds1307 = dev_get_drvdata(dev);
> > +
> > + if (device_may_wakeup(dev))
> > + enable_irq_wake(ds1307->irq);
> > +
> > + return 0;
> > +}
> > +
> > +static int ds1307_resume(struct device *dev)
> > +{
> > + struct ds1307 *ds1307 = dev_get_drvdata(dev);
> > +
> > + if (device_may_wakeup(dev))
> > + disable_irq_wake(ds1307->irq);
> > +
> > + return 0;
> > +}
> > +#endif
> > +
> > +static SIMPLE_DEV_PM_OPS(ds1307_pm_ops, ds1307_suspend, ds1307_resume);
> > +
> > static struct i2c_driver ds1307_driver = {
> > .driver = {
> > .name = "rtc-ds1307",
> > .of_match_table = of_match_ptr(ds1307_of_match),
> > .acpi_match_table = ACPI_PTR(ds1307_acpi_ids),
> > + .pm = &ds1307_pm_ops,
> > },
> > .probe = ds1307_probe,
> > .id_table = ds1307_id,
> > --
> > 2.9.3
> >
>
> A gentle ping, any comments on this?
>
It was rejected following the discussion you had with Heiner and your
email of the 25/08.
--
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
