static int ak8975_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ak8975_data *data;
int err;
/* Allocate our device context. */
data = kzalloc(sizeof(struct ak8975_data), GFP_KERNEL);
if (!data) {
dev_err(&client->dev, "Memory allocation fails\n");
err = -ENOMEM;
goto exit;
}
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->lock);
/* Grab and set up the supplied GPIO. */
data->eoc_irq = client->irq;
data->eoc_gpio = irq_to_gpio(client->irq);
/* We may not have a GPIO based IRQ to scan, that is fine, we will
poll if so */
if (data->eoc_gpio > 0) {
err = gpio_request(data->eoc_gpio, "ak_8975");
if (err < 0) {
dev_err(&client->dev,
"failed to request GPIO %d, error %d\n",
data->eoc_gpio, err);
goto exit_free;
}
err = gpio_direction_input(data->eoc_gpio);
if (err < 0) {
dev_err(&client->dev,
"Failed to configure input direction for GPIO %d, error %d\n",
data->eoc_gpio, err);
goto exit_gpio;
}
} else
data->eoc_gpio = 0; /* No GPIO available */
/* Perform some basic start-of-day setup of the device. */
err = ak8975_setup(client);
if (err < 0) {
dev_err(&client->dev, "AK8975 initialization fails\n");
goto exit_gpio;
}
/* Register with IIO */
data->indio_dev = iio_allocate_device(0);
if (data->indio_dev == NULL) {
err = -ENOMEM;
goto exit_gpio;
}
data->indio_dev->dev.parent = &client->dev;
data->indio_dev->info = &ak8975_info;
data->indio_dev->dev_data = (void *)(data);
data->indio_dev->modes = INDIO_DIRECT_MODE;
err = iio_device_register(data->indio_dev);
if (err < 0)
goto exit_free_iio;
return 0;
exit_free_iio:
iio_free_device(data->indio_dev);
exit_gpio:
if (data->eoc_gpio)
gpio_free(data->eoc_gpio);
exit_free:
kfree(data);
exit:
return err;
}
static int ak8975_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ak8975_data *data;
struct iio_dev *indio_dev;
int eoc_gpio;
int err;
/* Grab and set up the supplied GPIO. */
if (client->dev.platform_data == NULL)
eoc_gpio = -1;
else
eoc_gpio = *(int *)(client->dev.platform_data);
/* We may not have a GPIO based IRQ to scan, that is fine, we will
poll if so */
if (gpio_is_valid(eoc_gpio)) {
err = gpio_request_one(eoc_gpio, GPIOF_IN, "ak_8975");
if (err < 0) {
dev_err(&client->dev,
"failed to request GPIO %d, error %d\n",
eoc_gpio, err);
goto exit;
}
}
/* Register with IIO */
indio_dev = iio_device_alloc(sizeof(*data));
if (indio_dev == NULL) {
err = -ENOMEM;
goto exit_gpio;
}
data = iio_priv(indio_dev);
i2c_set_clientdata(client, indio_dev);
/* Perform some basic start-of-day setup of the device. */
err = ak8975_setup(client);
if (err < 0) {
dev_err(&client->dev, "AK8975 initialization fails\n");
goto exit_free_iio;
}
data->client = client;
mutex_init(&data->lock);
data->eoc_gpio = eoc_gpio;
indio_dev->dev.parent = &client->dev;
indio_dev->channels = ak8975_channels;
indio_dev->num_channels = ARRAY_SIZE(ak8975_channels);
indio_dev->info = &ak8975_info;
indio_dev->modes = INDIO_DIRECT_MODE;
err = iio_device_register(indio_dev);
if (err < 0)
goto exit_free_iio;
return 0;
exit_free_iio:
iio_device_free(indio_dev);
exit_gpio:
if (gpio_is_valid(eoc_gpio))
gpio_free(eoc_gpio);
exit:
return err;
}
static int ak8975_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ak8975_data *data;
struct iio_dev *indio_dev;
int eoc_gpio;
int err;
char *name = NULL;
/* Grab and set up the supplied GPIO. */
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 */
if (gpio_is_valid(eoc_gpio)) {
err = devm_gpio_request_one(&client->dev, eoc_gpio,
GPIOF_IN, "ak_8975");
if (err < 0) {
dev_err(&client->dev,
"failed to request GPIO %d, error %d\n",
eoc_gpio, err);
return err;
}
}
/* Register with IIO */
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (indio_dev == NULL)
return -ENOMEM;
data = iio_priv(indio_dev);
i2c_set_clientdata(client, indio_dev);
data->client = client;
data->eoc_gpio = eoc_gpio;
data->eoc_irq = 0;
/* id will be NULL when enumerated via ACPI */
if (id) {
data->chipset =
(enum asahi_compass_chipset)(id->driver_data);
name = (char *) id->name;
} else if (ACPI_HANDLE(&client->dev))
name = ak8975_match_acpi_device(&client->dev, &data->chipset);
else
return -ENOSYS;
dev_dbg(&client->dev, "Asahi compass chip %s\n", name);
/* Perform some basic start-of-day setup of the device. */
err = ak8975_setup(client);
if (err < 0) {
dev_err(&client->dev, "AK8975 initialization fails\n");
return err;
}
data->client = client;
mutex_init(&data->lock);
data->eoc_gpio = eoc_gpio;
indio_dev->dev.parent = &client->dev;
indio_dev->channels = ak8975_channels;
indio_dev->num_channels = ARRAY_SIZE(ak8975_channels);
indio_dev->info = &ak8975_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->name = name;
err = devm_iio_device_register(&client->dev, indio_dev);
if (err < 0)
return err;
return 0;
}
