linux_dsm_epyc7002/drivers/iio/accel/da280.c
Alexandru Ardelean d3be83244c iio: remove explicit IIO device parent assignment
This patch applies the semantic patch:
@@
expression I, P, SP;
@@
   I = devm_iio_device_alloc(P, SP);
   ...
-  I->dev.parent = P;

It updates 302 files and does 307 deletions.
This semantic patch also removes some comments like
'/* Establish that the iio_dev is a child of the i2c device */'

But this is is only done in case where the block is left empty.

The patch does not seem to cover all cases. It looks like in some cases a
different variable is used in some cases to assign the parent, but it
points to the same reference.
In other cases, the block covered by ... may be just too big to be covered
by the semantic patch.

However, this looks pretty good as well, as it does cover a big bulk of the
drivers that should remove the parent assignment.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-06-14 11:49:59 +01:00

206 lines
4.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/**
* IIO driver for the MiraMEMS DA280 3-axis accelerometer and
* IIO driver for the MiraMEMS DA226 2-axis accelerometer
*
* Copyright (c) 2016 Hans de Goede <hdegoede@redhat.com>
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/acpi.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/byteorder/generic.h>
#define DA280_REG_CHIP_ID 0x01
#define DA280_REG_ACC_X_LSB 0x02
#define DA280_REG_ACC_Y_LSB 0x04
#define DA280_REG_ACC_Z_LSB 0x06
#define DA280_REG_MODE_BW 0x11
#define DA280_CHIP_ID 0x13
#define DA280_MODE_ENABLE 0x1e
#define DA280_MODE_DISABLE 0x9e
enum da280_chipset { da226, da280 };
/*
* a value of + or -4096 corresponds to + or - 1G
* scale = 9.81 / 4096 = 0.002395019
*/
static const int da280_nscale = 2395019;
#define DA280_CHANNEL(reg, axis) { \
.type = IIO_ACCEL, \
.address = reg, \
.modified = 1, \
.channel2 = IIO_MOD_##axis, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
}
static const struct iio_chan_spec da280_channels[] = {
DA280_CHANNEL(DA280_REG_ACC_X_LSB, X),
DA280_CHANNEL(DA280_REG_ACC_Y_LSB, Y),
DA280_CHANNEL(DA280_REG_ACC_Z_LSB, Z),
};
struct da280_data {
struct i2c_client *client;
};
static int da280_enable(struct i2c_client *client, bool enable)
{
u8 data = enable ? DA280_MODE_ENABLE : DA280_MODE_DISABLE;
return i2c_smbus_write_byte_data(client, DA280_REG_MODE_BW, data);
}
static int da280_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
{
struct da280_data *data = iio_priv(indio_dev);
int ret;
switch (mask) {
case IIO_CHAN_INFO_RAW:
ret = i2c_smbus_read_word_data(data->client, chan->address);
if (ret < 0)
return ret;
/*
* Values are 14 bits, stored as 16 bits with the 2
* least significant bits always 0.
*/
*val = (short)ret >> 2;
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
*val = 0;
*val2 = da280_nscale;
return IIO_VAL_INT_PLUS_NANO;
default:
return -EINVAL;
}
}
static const struct iio_info da280_info = {
.read_raw = da280_read_raw,
};
static enum da280_chipset da280_match_acpi_device(struct device *dev)
{
const struct acpi_device_id *id;
id = acpi_match_device(dev->driver->acpi_match_table, dev);
if (!id)
return -EINVAL;
return (enum da280_chipset) id->driver_data;
}
static int da280_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret;
struct iio_dev *indio_dev;
struct da280_data *data;
enum da280_chipset chip;
ret = i2c_smbus_read_byte_data(client, DA280_REG_CHIP_ID);
if (ret != DA280_CHIP_ID)
return (ret < 0) ? ret : -ENODEV;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
return -ENOMEM;
data = iio_priv(indio_dev);
data->client = client;
i2c_set_clientdata(client, indio_dev);
indio_dev->info = &da280_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = da280_channels;
if (ACPI_HANDLE(&client->dev)) {
chip = da280_match_acpi_device(&client->dev);
} else {
chip = id->driver_data;
}
if (chip == da226) {
indio_dev->name = "da226";
indio_dev->num_channels = 2;
} else {
indio_dev->name = "da280";
indio_dev->num_channels = 3;
}
ret = da280_enable(client, true);
if (ret < 0)
return ret;
ret = iio_device_register(indio_dev);
if (ret < 0) {
dev_err(&client->dev, "device_register failed\n");
da280_enable(client, false);
}
return ret;
}
static int da280_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
iio_device_unregister(indio_dev);
return da280_enable(client, false);
}
#ifdef CONFIG_PM_SLEEP
static int da280_suspend(struct device *dev)
{
return da280_enable(to_i2c_client(dev), false);
}
static int da280_resume(struct device *dev)
{
return da280_enable(to_i2c_client(dev), true);
}
#endif
static SIMPLE_DEV_PM_OPS(da280_pm_ops, da280_suspend, da280_resume);
static const struct acpi_device_id da280_acpi_match[] = {
{"MIRAACC", da280},
{},
};
MODULE_DEVICE_TABLE(acpi, da280_acpi_match);
static const struct i2c_device_id da280_i2c_id[] = {
{ "da226", da226 },
{ "da280", da280 },
{}
};
MODULE_DEVICE_TABLE(i2c, da280_i2c_id);
static struct i2c_driver da280_driver = {
.driver = {
.name = "da280",
.acpi_match_table = ACPI_PTR(da280_acpi_match),
.pm = &da280_pm_ops,
},
.probe = da280_probe,
.remove = da280_remove,
.id_table = da280_i2c_id,
};
module_i2c_driver(da280_driver);
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_DESCRIPTION("MiraMEMS DA280 3-Axis Accelerometer driver");
MODULE_LICENSE("GPL v2");