linux-kernel - Re: [PATCH] gpiolib: cdev: add GPIO_V2_LINE_FLAG_EDGE_BOTH and use it in edge_irq

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Date:   Fri, 30 Oct 2020 15:53:55 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Kent Gibson <warthog618@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        linux-gpio <linux-gpio@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: Re: [PATCH] gpiolib: cdev: add GPIO_V2_LINE_FLAG_EDGE_BOTH and use it
 in edge_irq_thread()

On Thu, Oct 29, 2020 at 9:48 AM Kent Gibson <warthog618@...il.com> wrote:
>
> Add GPIO_V2_LINE_FLAG_EDGE_BOTH macro and use it in edge_irq_thread() to
> improve readability of edge handling cases.
>
> Suggested-by: Andy Shevchenko <andy.shevchenko@...il.com>
> Signed-off-by: Kent Gibson <warthog618@...il.com>
> ---
>  drivers/gpio/gpiolib-cdev.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
> index ea787eb3810d..5eb4435afa64 100644
> --- a/drivers/gpio/gpiolib-cdev.c
> +++ b/drivers/gpio/gpiolib-cdev.c
> @@ -510,6 +510,8 @@ struct linereq {
>         (GPIO_V2_LINE_FLAG_EDGE_RISING | \
>          GPIO_V2_LINE_FLAG_EDGE_FALLING)
>
> +#define GPIO_V2_LINE_FLAG_EDGE_BOTH GPIO_V2_LINE_EDGE_FLAGS
> +
>  #define GPIO_V2_LINE_VALID_FLAGS \
>         (GPIO_V2_LINE_FLAG_ACTIVE_LOW | \
>          GPIO_V2_LINE_DIRECTION_FLAGS | \
> @@ -569,8 +571,7 @@ static irqreturn_t edge_irq_thread(int irq, void *p)
>         line->timestamp_ns = 0;
>
>         eflags = READ_ONCE(line->eflags);
> -       if (eflags == (GPIO_V2_LINE_FLAG_EDGE_RISING |
> -                      GPIO_V2_LINE_FLAG_EDGE_FALLING)) {
> +       if (eflags == GPIO_V2_LINE_FLAG_EDGE_BOTH) {
>                 int level = gpiod_get_value_cansleep(line->desc);
>
>                 if (level)
> --
> 2.29.0
>

Applied, thanks!

Bartosz