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

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Date:   Mon, 4 Mar 2019 16:33:43 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Maxim Mikityanskiy <maxtram95@...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 Mon, Mar 4, 2019 at 4:09 PM Maxim Mikityanskiy <maxtram95@...il.com> wrote:
>
> 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?

It will be in 5.1-rc1 and then we may send it to stable trees.

>
> > > 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



-- 
With Best Regards,
Andy Shevchenko