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authorSteven A. Falco <sfalco@harris.com>2008-10-18 20:27:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 08:52:36 -0700
commite3274e915061a65717454106301d4a5ea8f71783 (patch)
treee88cb4ef896fe2f4e38b58ed1b0d2f2e543c70cb
parentc8fc40cd345bfd88d8a98e7916909b9143502999 (diff)
gpio: modify sysfs gpio export so that "value" displays as 0 or 1
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@harris.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/gpio/gpiolib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 9112830107a5..70de72c443e4 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -248,7 +248,7 @@ 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;