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iio: ak8975: minor fixes

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Fixes code duplication, return of function.
Check client->irq properly when setting up optional irq handler.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Gwendal Grignou 2014-11-21 10:45:47 -08:00 committed by Jonathan Cameron
parent 56ae98a205
commit 71222bf541
1 changed files with 14 additions and 21 deletions
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35
drivers/iio/magnetometer/ak8975.c
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@ -64,10 +64,10 @@
#define AK8975_REG_CNTL 0x0A
#define AK8975_REG_CNTL_MODE_SHIFT 0
#define AK8975_REG_CNTL_MODE_MASK (0xF << AK8975_REG_CNTL_MODE_SHIFT)
#define AK8975_REG_CNTL_MODE_POWER_DOWN 0
#define AK8975_REG_CNTL_MODE_ONCE 1
#define AK8975_REG_CNTL_MODE_SELF_TEST 8
#define AK8975_REG_CNTL_MODE_FUSE_ROM 0xF
#define AK8975_REG_CNTL_MODE_POWER_DOWN 0x00
#define AK8975_REG_CNTL_MODE_ONCE 0x01
#define AK8975_REG_CNTL_MODE_SELF_TEST 0x08
#define AK8975_REG_CNTL_MODE_FUSE_ROM 0x0F
#define AK8975_REG_RSVC 0x0B
#define AK8975_REG_ASTC 0x0C
@ -166,8 +166,8 @@ static int ak8975_setup_irq(struct ak8975_data *data)
irq = gpio_to_irq(data->eoc_gpio);
rc = devm_request_irq(&client->dev, irq, ak8975_irq_handler,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
dev_name(&client->dev), data);
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
dev_name(&client->dev), data);
if (rc < 0) {
dev_err(&client->dev,
"irq %d request failed, (gpio %d): %d\n",
@ -231,8 +231,12 @@ static int ak8975_setup(struct i2c_client *client)
AK8975_REG_CNTL_MODE_POWER_DOWN,
AK8975_REG_CNTL_MODE_MASK,
AK8975_REG_CNTL_MODE_SHIFT);
if (ret < 0) {
dev_err(&client->dev, "Error in setting power-down mode\n");
return ret;
}
if (data->eoc_gpio > 0 || client->irq) {
if (data->eoc_gpio > 0 || client->irq > 0) {
ret = ak8975_setup_irq(data);
if (ret < 0) {
dev_err(&client->dev,
@ -241,11 +245,6 @@ static int ak8975_setup(struct i2c_client *client)
}
}
if (ret < 0) {
dev_err(&client->dev, "Error in setting power-down mode\n");
return ret;
}
/*
* Precalculate scale factor (in Gauss units) for each axis and
* store in the device data.
@ -550,24 +549,18 @@ static int ak8975_probe(struct i2c_client *client,
/* 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");
dev_err(&client->dev, "%s initialization fails\n", name);
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;
return devm_iio_device_register(&client->dev, indio_dev);
}
static const struct i2c_device_id ak8975_id[] = {
@ -588,7 +581,7 @@ MODULE_DEVICE_TABLE(of, ak8975_of_match);
static struct i2c_driver ak8975_driver = {
.driver = {
.name = "ak8975",
.of_match_table = ak8975_of_match,
.of_match_table = of_match_ptr(ak8975_of_match),
.acpi_match_table = ACPI_PTR(ak_acpi_match),
},
.probe = ak8975_probe,