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staging:iio:magnetometer:ak8975: Don't assume 0 is an invalid GPIO

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gpio_is_valid() is the defined mechanism to determine whether a GPIO is
valid. Use this instead of assuming that 0 is an invalid GPIO.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Andrew Chew <achew@nvidia.com>
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Stephen Warren 2011-09-21 11:16:00 +01:00 committed by Greg Kroah-Hartman
parent f6d838d7fe
commit 7c6c936832
1 changed files with 5 additions and 6 deletions
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11
drivers/staging/iio/magnetometer/ak8975.c
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@ -373,7 +373,7 @@ static int ak8975_read_axis(struct iio_dev *indio_dev, int index, int *val)
}
/* Wait for the conversion to complete. */
if (data->eoc_gpio)
if (gpio_is_valid(data->eoc_gpio))
ret = wait_conversion_complete_gpio(data);
else
ret = wait_conversion_complete_polled(data);
@ -484,7 +484,7 @@ static int ak8975_probe(struct i2c_client *client,
/* We may not have a GPIO based IRQ to scan, that is fine, we will
poll if so */
if (eoc_gpio > 0) {
if (gpio_is_valid(eoc_gpio)) {
err = gpio_request(eoc_gpio, "ak_8975");
if (err < 0) {
dev_err(&client->dev,
@ -500,8 +500,7 @@ static int ak8975_probe(struct i2c_client *client,
eoc_gpio, err);
goto exit_gpio;
}
} else
eoc_gpio = 0; /* No GPIO available */
}
/* Register with IIO */
indio_dev = iio_allocate_device(sizeof(*data));
@ -537,7 +536,7 @@ static int ak8975_probe(struct i2c_client *client,
exit_free_iio:
iio_free_device(indio_dev);
exit_gpio:
if (eoc_gpio)
if (gpio_is_valid(eoc_gpio))
gpio_free(eoc_gpio);
exit:
return err;
@ -551,7 +550,7 @@ static int ak8975_remove(struct i2c_client *client)
iio_device_unregister(indio_dev);
if (eoc_gpio)
if (gpio_is_valid(eoc_gpio))
gpio_free(eoc_gpio);
return 0;