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Date: Thu, 4 Jun 2020 16:16:51 +0800 From: Chunyan Zhang <zhang.lyra@...il.com> To: Lee Jones <lee.jones@...aro.org> 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 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 :) Thanks, Chunyan > --- > 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, > }; > -- > 2.20.1 >
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