[PATCH] gpio sysfs: add a "toggle" value

[Mike Frysinger]

Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx>
---
 drivers/gpio/gpiolib.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

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;
-- 
1.6.3.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/