---------- 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" <[email protected]>
To: "[email protected]" <[email protected]>, [email protected]
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 <[email protected]>
Signed-off-by: David Brownell <[email protected]>
---
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;
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