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SubjectRe: [PATCH] gpio sysfs: add a "toggle" value
On Wed,  3 Jun 2009 04:16:59 -0400 Mike Frysinger <vapier@gentoo.org> wrote:

> Signed-off-by: Mike Frysinger <vapier@gentoo.org>

-ENOCHANGELOGAGAIN

> diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
> index 51a8d41..7f79732 100644
> --- a/drivers/gpio/gpiolib.c
> +++ b/drivers/gpio/gpiolib.c
> @@ -274,7 +274,12 @@ static ssize_t gpio_value_store(struct device *dev,
> else {
> long value;
>
> - status = strict_strtol(buf, 0, &value);
> + if (sysfs_streq(buf, "toggle")) {
> + value = !gpio_get_value_cansleep(gpio);
> + status = 0;
> + } else
> + status = strict_strtol(buf, 0, &value);
> +
> if (status == 0) {
> gpio_set_value_cansleep(gpio, value != 0);
> status = size;

A suitable place to document this is Documentation/gpio.txt.


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