linux-kernel - Re: [PATCH v1 1/2] gpio: tegra: Fix wake interrupt

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Date:   Tue, 19 Jan 2021 13:51:56 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Matt Merhar <mattmerhar@...tonmail.com>,
        linux-tegra <linux-tegra@...r.kernel.org>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/2] gpio: tegra: Fix wake interrupt

On Tue, Jan 12, 2021 at 2:30 PM Dmitry Osipenko <digetx@...il.com> wrote:
>
> The GPIO bank wake interrupt setting was erroneously removed after
> conversion to gpio_irq_chip, thus the wake interrupt programming is
> broken now. Secondly, the wake_enb of the GPIO driver should be changed
> only after the successful toggling of the IRQ wake-state. Restore the wake
> interrupt setting and the programming order.
>
> Fixes: efcdca286eef ("gpio: tegra: Convert to gpio_irq_chip")
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  drivers/gpio/gpio-tegra.c | 16 +++++++++++++---
>  1 file changed, 13 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
> index b8a4fd07c559..6c79e9d2f932 100644
> --- a/drivers/gpio/gpio-tegra.c
> +++ b/drivers/gpio/gpio-tegra.c
> @@ -541,6 +541,7 @@ static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
>         struct tegra_gpio_bank *bank;
>         unsigned int gpio = d->hwirq;
>         u32 port, bit, mask;
> +       int err;
>
>         bank = &tgi->bank_info[GPIO_BANK(d->hwirq)];
>
> @@ -548,14 +549,23 @@ static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
>         bit = GPIO_BIT(gpio);
>         mask = BIT(bit);
>
> +       err = irq_set_irq_wake(tgi->irqs[bank->bank], enable);
> +       if (err)
> +               return err;
> +
> +       if (d->parent_data) {
> +               err = irq_chip_set_wake_parent(d, enable);
> +               if (err) {
> +                       irq_set_irq_wake(tgi->irqs[bank->bank], !enable);
> +                       return err;
> +               }
> +       }
> +
>         if (enable)
>                 bank->wake_enb[port] |= mask;
>         else
>                 bank->wake_enb[port] &= ~mask;
>
> -       if (d->parent_data)
> -               return irq_chip_set_wake_parent(d, enable);
> -
>         return 0;
>  }
>  #endif
> --
> 2.29.2
>

Applied, thanks!

Bartosz