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Commit f4b7f751 authored by Jacek Anaszewski's avatar Jacek Anaszewski Committed by Jonathan Cameron
Browse files

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: default avatarJacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent e64e7d5c

Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt

0 → 100644
+18 −0
Original line number Diff line number Diff line 
* AsahiKASEI AK8975 magnetometer sensor



Required properties:



  - compatible : should be "asahi-kasei,ak8975"

  - reg : the I2C address of the magnetometer



Optional properties:



  - gpios : should be device tree identifier of the magnetometer DRDY pin



Example:



ak8975@0c {

        compatible = "asahi-kasei,ak8975";

        reg = <0x0c>;

        gpios = <&gpj0 7 0>;

};

drivers/iio/magnetometer/ak8975.c

+9 −3
Original line number Diff line number Diff line
@@ -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 */