linux-kernel - Re: [PATCH] gpio/rockchip: lock GPIOs used as interrupts

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Date:   Fri, 3 Dec 2021 15:59:51 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     John Keeping <john@...anate.com>
Cc:     "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio/rockchip: lock GPIOs used as interrupts

On Thu, Dec 2, 2021 at 4:50 PM John Keeping <john@...anate.com> wrote:
>
> Use the standard gpiochip request/release resource functions so that any
> GPIOs used as interrupts are properly locked.  This allows libgpiod to
> correctly show these GPIOs as in-use.
>
> Signed-off-by: John Keeping <john@...anate.com>
> ---
>  drivers/gpio/gpio-rockchip.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
>
> diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
> index ce63cbd14d69a..c1b8e5dbbcc47 100644
> --- a/drivers/gpio/gpio-rockchip.c
> +++ b/drivers/gpio/gpio-rockchip.c
> @@ -465,6 +465,22 @@ static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
>         return ret;
>  }
>
> +static int rockchip_irq_reqres(struct irq_data *d)
> +{
> +       struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> +       struct rockchip_pin_bank *bank = gc->private;
> +
> +       return gpiochip_reqres_irq(&bank->gpio_chip, d->hwirq);
> +}
> +
> +static void rockchip_irq_relres(struct irq_data *d)
> +{
> +       struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> +       struct rockchip_pin_bank *bank = gc->private;
> +
> +       gpiochip_relres_irq(&bank->gpio_chip, d->hwirq);
> +}
> +
>  static void rockchip_irq_suspend(struct irq_data *d)
>  {
>         struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
> @@ -536,6 +552,8 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
>         gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend;
>         gc->chip_types[0].chip.irq_resume = rockchip_irq_resume;
>         gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
> +       gc->chip_types[0].chip.irq_request_resources = rockchip_irq_reqres;
> +       gc->chip_types[0].chip.irq_release_resources = rockchip_irq_relres;
>         gc->wake_enabled = IRQ_MSK(bank->nr_pins);
>
>         /*
> --
> 2.34.1
>

The title should be: gpio: rockchip: ...

Queued for next, thanks!

Bart