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authorJacek Anaszewski <j.anaszewski@samsung.com>2013-05-07 14:41:00 +0400
committerJonathan Cameron <jic23@kernel.org>2013-05-23 01:16:48 +0400
commitf4b7f751c6fd2bd7e6d3a83385ee292c39995bdb (patch)
tree17a916b8e7917ca52ac1144443184e87637914b2 /drivers/iio
parente64e7d5c8c86ead27ed51a95687ba8327a9c4d2a (diff)
downloadlinux-f4b7f751c6fd2bd7e6d3a83385ee292c39995bdb.tar.xz
iio:ak8975 Add support for gpios DT property
Add support for parsing 'gpios' property when initializing from oftree. This patch adds also the binding documentation file. Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
-rw-r--r--drivers/iio/magnetometer/ak8975.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index af6c320a534e..d75cc23e8ae7 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -29,6 +29,7 @@
#include <linux/delay.h>
#include <linux/gpio.h>
+#include <linux/of_gpio.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -384,10 +385,15 @@ static int ak8975_probe(struct i2c_client *client,
int err;
/* Grab and set up the supplied GPIO. */
- if (client->dev.platform_data == NULL)
- eoc_gpio = -1;
- else
+ if (client->dev.platform_data)
eoc_gpio = *(int *)(client->dev.platform_data);
+ else if (client->dev.of_node)
+ eoc_gpio = of_get_gpio(client->dev.of_node, 0);
+ else
+ eoc_gpio = -1;
+
+ if (eoc_gpio == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
/* We may not have a GPIO based IRQ to scan, that is fine, we will
poll if so */