linux-kernel - Re: [PATCH V2] mfd: sprd: Add wakeup capability for PMIC irq

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Date:   Thu, 4 Jun 2020 12:16:39 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Chunyan Zhang <zhang.lyra@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>
Subject: Re: [PATCH V2] mfd: sprd: Add wakeup capability for PMIC irq

On Thu, 04 Jun 2020, Chunyan Zhang wrote:

> Hi Lee,
> 
> On Wed, 27 May 2020 at 14:21, Chunyan Zhang <zhang.lyra@...il.com> wrote:
> >
> > From: Baolin Wang <baolin.wang7@...il.com>
> >
> > When changing to use suspend-to-idle to save power, the PMIC irq can not
> > wakeup the system due to lack of wakeup capability, which will cause
> > the sub-irqs (such as power key) of the PMIC can not wake up the system.
> > Thus we can add the wakeup capability for PMIC irq to solve this issue,
> > as well as removing the IRQF_NO_SUSPEND flag to allow PMIC irq to be
> > a wakeup source.
> >
> > Reported-by: Chunyan Zhang <zhang.lyra@...il.com>
> > Signed-off-by: Baolin Wang <baolin.wang7@...il.com>
> > Tested-by: Chunyan Zhang <chunyan.zhang@...soc.com>
> > ---
> > Changes from v1:
> > * addressed comments from Lee;
> > * added tested-by from Chunyan.
> > (This patch is rebased on branch for-mfd-next)
> 
> Could you please pick up this patch if there's no more comments :)

Please don't send contentless nags.  Your patch is in my queue.

The merge-window is currently open, which is a) a busy time for
Maintainers and b) a time where some of us take a little breather
before the next release.  Please wait until -rc1 has been released
before sending out your [RESENDS].

> > ---
> >  drivers/mfd/sprd-sc27xx-spi.c | 28 +++++++++++++++++++++++++++-
> >  1 file changed, 27 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/mfd/sprd-sc27xx-spi.c b/drivers/mfd/sprd-sc27xx-spi.c
> > index 33336cde4724..adb4a1b13332 100644
> > --- a/drivers/mfd/sprd-sc27xx-spi.c
> > +++ b/drivers/mfd/sprd-sc27xx-spi.c
> > @@ -256,7 +256,7 @@ static int sprd_pmic_probe(struct spi_device *spi)
> >         }
> >
> >         ret = devm_regmap_add_irq_chip(&spi->dev, ddata->regmap, ddata->irq,
> > -                                      IRQF_ONESHOT | IRQF_NO_SUSPEND, 0,
> > +                                      IRQF_ONESHOT, 0,
> >                                        &ddata->irq_chip, &ddata->irq_data);
> >         if (ret) {
> >                 dev_err(&spi->dev, "Failed to add PMIC irq chip %d\n", ret);
> > @@ -272,9 +272,34 @@ static int sprd_pmic_probe(struct spi_device *spi)
> >                 return ret;
> >         }
> >
> > +       device_init_wakeup(&spi->dev, true);
> >         return 0;
> >  }
> >
> > +#ifdef CONFIG_PM_SLEEP
> > +static int sprd_pmic_suspend(struct device *dev)
> > +{
> > +       struct sprd_pmic *ddata = dev_get_drvdata(dev);
> > +
> > +       if (device_may_wakeup(dev))
> > +               enable_irq_wake(ddata->irq);
> > +
> > +       return 0;
> > +}
> > +
> > +static int sprd_pmic_resume(struct device *dev)
> > +{
> > +       struct sprd_pmic *ddata = dev_get_drvdata(dev);
> > +
> > +       if (device_may_wakeup(dev))
> > +               disable_irq_wake(ddata->irq);
> > +
> > +       return 0;
> > +}
> > +#endif
> > +
> > +static SIMPLE_DEV_PM_OPS(sprd_pmic_pm_ops, sprd_pmic_suspend, sprd_pmic_resume);
> > +
> >  static const struct of_device_id sprd_pmic_match[] = {
> >         { .compatible = "sprd,sc2731", .data = &sc2731_data },
> >         {},
> > @@ -285,6 +310,7 @@ static struct spi_driver sprd_pmic_driver = {
> >         .driver = {
> >                 .name = "sc27xx-pmic",
> >                 .of_match_table = sprd_pmic_match,
> > +               .pm = &sprd_pmic_pm_ops,
> >         },
> >         .probe = sprd_pmic_probe,
> >  };
> >

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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