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>
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@ -0,0 +1,18 @@
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* AsahiKASEI AK8975 magnetometer sensor
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Required properties:
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- compatible : should be "asahi-kasei,ak8975"
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- reg : the I2C address of the magnetometer
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Optional properties:
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- gpios : should be device tree identifier of the magnetometer DRDY pin
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Example:
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ak8975@0c {
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compatible = "asahi-kasei,ak8975";
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reg = <0x0c>;
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gpios = <&gpj0 7 0>;
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};
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@ -29,6 +29,7 @@
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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@ -384,10 +385,15 @@ static int ak8975_probe(struct i2c_client *client,
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int err;
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/* Grab and set up the supplied GPIO. */
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if (client->dev.platform_data == NULL)
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eoc_gpio = -1;
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else
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if (client->dev.platform_data)
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eoc_gpio = *(int *)(client->dev.platform_data);
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else if (client->dev.of_node)
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eoc_gpio = of_get_gpio(client->dev.of_node, 0);
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else
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eoc_gpio = -1;
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if (eoc_gpio == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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/* We may not have a GPIO based IRQ to scan, that is fine, we will
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poll if so */
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