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Date: Thu, 16 Oct 2008 12:45:59 -0700 From: David Brownell <david-b@...bell.net> To: Andrew Morton <akpm@...ux-foundation.org> Cc: lkml <linux-kernel@...r.kernel.org> Subject: Fwd: [PATCH] Modify sysfs gpio export so that "value" displays as 0 or 1 ---------- Forwarded Message ---------- Subject: [PATCH] Modify sysfs gpio export so that "value" displays as 0 or 1 Date: Friday 10 October 2008 From: "Steven A. Falco" <sfalco@...ris.com> To: "linuxppc-dev@...abs.org" <linuxppc-dev@...abs.org>, david-b@...bell.net gpiolib can export GPIOs to userspace via sysfs. This patch modifies the gpio_value_show() so that any non-zero value is explicitly printed as "1", rather than whatever numerical value the lower-level driver returns. Signed-off-by: Steve Falco <sfalco@...ris.com> Signed-off-by: David Brownell <dbrownell@...rs.sourceforge.net> --- diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 8d29405..36bf72b 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -237,7 +237,7 @@ static ssize_t gpio_value_show(struct device *dev, if (!test_bit(FLAG_EXPORT, &desc->flags)) status = -EIO; else - status = sprintf(buf, "%d\n", gpio_get_value_cansleep(gpio)); + status = sprintf(buf, "%d\n", !!gpio_get_value_cansleep(gpio)); mutex_unlock(&sysfs_lock); return status; ------------------------------------------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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