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

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Date:   Wed, 26 Sep 2018 12:34:28 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     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: Implement irq_set_wake

On Mon, Sep 24, 2018 at 5:37 PM Hans de Goede <hdegoede@...hat.com> wrote:
>
> We were relying on the interrupt being shared with the ACPI SCI and the
> ACPI core calling irq_set_wake. But that does not always happen on
> Bay Trail devices, so we should do it ourselves.
>
> This fixes wake from USB not working on various Bay Trail devices.
>

Pushed to my review and testing queue, thanks!

> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
> ---
>  drivers/platform/x86/intel_int0002_vgpio.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/drivers/platform/x86/intel_int0002_vgpio.c b/drivers/platform/x86/intel_int0002_vgpio.c
> index 987a3b03f225..33c3489f5bc1 100644
> --- a/drivers/platform/x86/intel_int0002_vgpio.c
> +++ b/drivers/platform/x86/intel_int0002_vgpio.c
> @@ -106,6 +106,21 @@ static void int0002_irq_mask(struct irq_data *data)
>         outl(gpe_en_reg, GPE0A_EN_PORT);
>  }
>
> +static int int0002_irq_set_wake(struct irq_data *data, unsigned int on)
> +{
> +       struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
> +       struct platform_device *pdev = to_platform_device(chip->parent);
> +       int irq = platform_get_irq(pdev, 0);
> +
> +       /* Propagate to parent irq */
> +       if (on)
> +               enable_irq_wake(irq);
> +       else
> +               disable_irq_wake(irq);
> +
> +       return 0;
> +}
> +
>  static irqreturn_t int0002_irq(int irq, void *data)
>  {
>         struct gpio_chip *chip = data;
> @@ -128,6 +143,7 @@ static struct irq_chip int0002_irqchip = {
>         .irq_ack                = int0002_irq_ack,
>         .irq_mask               = int0002_irq_mask,
>         .irq_unmask             = int0002_irq_unmask,
> +       .irq_set_wake           = int0002_irq_set_wake,
>  };
>
>  static int int0002_probe(struct platform_device *pdev)
> --
> 2.19.0.rc1
>


-- 
With Best Regards,
Andy Shevchenko