linux-kernel - Re: [PATCH] platform/x86: intel_int0002_vgpio: Only implement irq_set

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Date:   Mon, 4 Mar 2019 16:09:18 +0200
From:   Maxim Mikityanskiy <maxtram95@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] platform/x86: intel_int0002_vgpio: Only implement
 irq_set_wake on Bay Trail

On Tue, Feb 5, 2019 at 8:20 PM Andy Shevchenko
<andy.shevchenko@...il.com> wrote:
>
> On Sun, Feb 3, 2019 at 11:42 AM Hans de Goede <hdegoede@...hat.com> wrote:
> >
> > Commit c3b8e884defa ("platform/x86: intel_int0002_vgpio: Implement
> > irq_set_wake"), was written to fix some wakeup issues on Bay Trail (BYT)
> > devices.
> >
> > We've received a bug report that this causes a suspend regression on some
> > Cherry Trail (CHT) based devices.
> >
> > To fix the issues this causes on CHT devices, this commit modifies the
> > irq_set_wake support so that we only implement irq_set_wake on BYT devices,
> >
>
> Pushed to my review and testing queue, thanks!

Kernel 5.0 was released without this patch, is it still planned to merge it?

> > Fixes: c3b8e884defa ("platform/x86: intel_int0002_vgpio: ... irq_set_wake")
> > Reported-and-tested-by: Maxim Mikityanskiy <maxtram95@...il.com>
> > Signed-off-by: Hans de Goede <hdegoede@...hat.com>
> > ---
> >  drivers/platform/x86/intel_int0002_vgpio.c | 32 ++++++++++++++++++----
> >  1 file changed, 26 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/platform/x86/intel_int0002_vgpio.c b/drivers/platform/x86/intel_int0002_vgpio.c
> > index 4b8f7305fc8a..78787934b572 100644
> > --- a/drivers/platform/x86/intel_int0002_vgpio.c
> > +++ b/drivers/platform/x86/intel_int0002_vgpio.c
> > @@ -51,11 +51,14 @@
> >  #define GPE0A_STS_PORT                 0x420
> >  #define GPE0A_EN_PORT                  0x428
> >
> > -#define ICPU(model)    { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, }
> > +#define BAYTRAIL                       0x01
> > +#define CHERRYTRAIL                    0x02
> > +
> > +#define ICPU(model, data) { X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, data}
> >
> >  static const struct x86_cpu_id int0002_cpu_ids[] = {
> > -       ICPU(INTEL_FAM6_ATOM_SILVERMONT),       /* Valleyview, Bay Trail  */
> > -       ICPU(INTEL_FAM6_ATOM_AIRMONT),          /* Braswell, Cherry Trail */
> > +       ICPU(INTEL_FAM6_ATOM_SILVERMONT, BAYTRAIL), /* Valleyview, Bay Trail  */
> > +       ICPU(INTEL_FAM6_ATOM_AIRMONT, CHERRYTRAIL), /* Braswell, Cherry Trail */
> >         {}
> >  };
> >
> > @@ -135,7 +138,7 @@ static irqreturn_t int0002_irq(int irq, void *data)
> >         return IRQ_HANDLED;
> >  }
> >
> > -static struct irq_chip int0002_irqchip = {
> > +static struct irq_chip int0002_byt_irqchip = {
> >         .name                   = DRV_NAME,
> >         .irq_ack                = int0002_irq_ack,
> >         .irq_mask               = int0002_irq_mask,
> > @@ -143,10 +146,22 @@ static struct irq_chip int0002_irqchip = {
> >         .irq_set_wake           = int0002_irq_set_wake,
> >  };
> >
> > +static struct irq_chip int0002_cht_irqchip = {
> > +       .name                   = DRV_NAME,
> > +       .irq_ack                = int0002_irq_ack,
> > +       .irq_mask               = int0002_irq_mask,
> > +       .irq_unmask             = int0002_irq_unmask,
> > +       /*
> > +        * No set_wake, on CHT the IRQ is typically shared with the ACPI SCI
> > +        * and we don't want to mess with the ACPI SCI irq settings.
> > +        */
> > +};
> > +
> >  static int int0002_probe(struct platform_device *pdev)
> >  {
> >         struct device *dev = &pdev->dev;
> >         const struct x86_cpu_id *cpu_id;
> > +       struct irq_chip *irq_chip;
> >         struct gpio_chip *chip;
> >         int irq, ret;
> >
> > @@ -195,14 +210,19 @@ static int int0002_probe(struct platform_device *pdev)
> >                 return ret;
> >         }
> >
> > -       ret = gpiochip_irqchip_add(chip, &int0002_irqchip, 0, handle_edge_irq,
> > +       if (cpu_id->driver_data == BAYTRAIL)
> > +               irq_chip = &int0002_byt_irqchip;
> > +       else
> > +               irq_chip = &int0002_cht_irqchip;
> > +
> > +       ret = gpiochip_irqchip_add(chip, irq_chip, 0, handle_edge_irq,
> >                                    IRQ_TYPE_NONE);
> >         if (ret) {
> >                 dev_err(dev, "Error adding irqchip: %d\n", ret);
> >                 return ret;
> >         }
> >
> > -       gpiochip_set_chained_irqchip(chip, &int0002_irqchip, irq, NULL);
> > +       gpiochip_set_chained_irqchip(chip, irq_chip, irq, NULL);
> >
> >         return 0;
> >  }
> > --
> > 2.20.1
> >
>
>
> --
> With Best Regards,
> Andy Shevchenko