linux/drivers/iio/light/cm3323.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

272 lines
6.1 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* CM3323 - Capella Color Light Sensor
*
* Copyright (c) 2015, Intel Corporation.
*
* IIO driver for CM3323 (7-bit I2C slave address 0x10)
*
* TODO: calibscale to correct the lens factor
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#define CM3323_DRV_NAME "cm3323"
#define CM3323_CMD_CONF 0x00
#define CM3323_CMD_RED_DATA 0x08
#define CM3323_CMD_GREEN_DATA 0x09
#define CM3323_CMD_BLUE_DATA 0x0A
#define CM3323_CMD_CLEAR_DATA 0x0B
#define CM3323_CONF_SD_BIT BIT(0) /* sensor disable */
#define CM3323_CONF_AF_BIT BIT(1) /* auto/manual force mode */
#define CM3323_CONF_IT_MASK GENMASK(6, 4)
#define CM3323_CONF_IT_SHIFT 4
#define CM3323_INT_TIME_AVAILABLE "0.04 0.08 0.16 0.32 0.64 1.28"
static const struct {
int val;
int val2;
} cm3323_int_time[] = {
{0, 40000}, /* 40 ms */
{0, 80000}, /* 80 ms */
{0, 160000}, /* 160 ms */
{0, 320000}, /* 320 ms */
{0, 640000}, /* 640 ms */
{1, 280000}, /* 1280 ms */
};
struct cm3323_data {
struct i2c_client *client;
u16 reg_conf;
struct mutex mutex;
};
#define CM3323_COLOR_CHANNEL(_color, _addr) { \
.type = IIO_INTENSITY, \
.modified = 1, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_INT_TIME), \
.channel2 = IIO_MOD_LIGHT_##_color, \
.address = _addr, \
}
static const struct iio_chan_spec cm3323_channels[] = {
CM3323_COLOR_CHANNEL(RED, CM3323_CMD_RED_DATA),
CM3323_COLOR_CHANNEL(GREEN, CM3323_CMD_GREEN_DATA),
CM3323_COLOR_CHANNEL(BLUE, CM3323_CMD_BLUE_DATA),
CM3323_COLOR_CHANNEL(CLEAR, CM3323_CMD_CLEAR_DATA),
};
static IIO_CONST_ATTR_INT_TIME_AVAIL(CM3323_INT_TIME_AVAILABLE);
static struct attribute *cm3323_attributes[] = {
&iio_const_attr_integration_time_available.dev_attr.attr,
NULL
};
static const struct attribute_group cm3323_attribute_group = {
.attrs = cm3323_attributes,
};
static int cm3323_init(struct iio_dev *indio_dev)
{
int ret;
struct cm3323_data *data = iio_priv(indio_dev);
ret = i2c_smbus_read_word_data(data->client, CM3323_CMD_CONF);
if (ret < 0) {
dev_err(&data->client->dev, "Error reading reg_conf\n");
return ret;
}
/* enable sensor and set auto force mode */
ret &= ~(CM3323_CONF_SD_BIT | CM3323_CONF_AF_BIT);
ret = i2c_smbus_write_word_data(data->client, CM3323_CMD_CONF, ret);
if (ret < 0) {
dev_err(&data->client->dev, "Error writing reg_conf\n");
return ret;
}
data->reg_conf = ret;
return 0;
}
static void cm3323_disable(void *data)
{
int ret;
struct iio_dev *indio_dev = data;
struct cm3323_data *cm_data = iio_priv(indio_dev);
ret = i2c_smbus_write_word_data(cm_data->client, CM3323_CMD_CONF,
CM3323_CONF_SD_BIT);
if (ret < 0)
dev_err(&cm_data->client->dev, "Error writing reg_conf\n");
}
static int cm3323_set_it_bits(struct cm3323_data *data, int val, int val2)
{
int i, ret;
u16 reg_conf;
for (i = 0; i < ARRAY_SIZE(cm3323_int_time); i++) {
if (val == cm3323_int_time[i].val &&
val2 == cm3323_int_time[i].val2) {
reg_conf = data->reg_conf & ~CM3323_CONF_IT_MASK;
reg_conf |= i << CM3323_CONF_IT_SHIFT;
ret = i2c_smbus_write_word_data(data->client,
CM3323_CMD_CONF,
reg_conf);
if (ret < 0)
return ret;
data->reg_conf = reg_conf;
return 0;
}
}
return -EINVAL;
}
static int cm3323_get_it_bits(struct cm3323_data *data)
{
int bits;
bits = (data->reg_conf & CM3323_CONF_IT_MASK) >>
CM3323_CONF_IT_SHIFT;
if (bits >= ARRAY_SIZE(cm3323_int_time))
return -EINVAL;
return bits;
}
static int cm3323_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val,
int *val2, long mask)
{
int ret;
struct cm3323_data *data = iio_priv(indio_dev);
switch (mask) {
case IIO_CHAN_INFO_RAW:
mutex_lock(&data->mutex);
ret = i2c_smbus_read_word_data(data->client, chan->address);
if (ret < 0) {
mutex_unlock(&data->mutex);
return ret;
}
*val = ret;
mutex_unlock(&data->mutex);
return IIO_VAL_INT;
case IIO_CHAN_INFO_INT_TIME:
mutex_lock(&data->mutex);
ret = cm3323_get_it_bits(data);
if (ret < 0) {
mutex_unlock(&data->mutex);
return ret;
}
*val = cm3323_int_time[ret].val;
*val2 = cm3323_int_time[ret].val2;
mutex_unlock(&data->mutex);
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
}
static int cm3323_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int val,
int val2, long mask)
{
struct cm3323_data *data = iio_priv(indio_dev);
int ret;
switch (mask) {
case IIO_CHAN_INFO_INT_TIME:
mutex_lock(&data->mutex);
ret = cm3323_set_it_bits(data, val, val2);
mutex_unlock(&data->mutex);
return ret;
default:
return -EINVAL;
}
}
static const struct iio_info cm3323_info = {
.read_raw = cm3323_read_raw,
.write_raw = cm3323_write_raw,
.attrs = &cm3323_attribute_group,
};
static int cm3323_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct cm3323_data *data;
struct iio_dev *indio_dev;
int ret;
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
if (!indio_dev)
return -ENOMEM;
data = iio_priv(indio_dev);
i2c_set_clientdata(client, indio_dev);
data->client = client;
mutex_init(&data->mutex);
indio_dev->info = &cm3323_info;
indio_dev->name = CM3323_DRV_NAME;
indio_dev->channels = cm3323_channels;
indio_dev->num_channels = ARRAY_SIZE(cm3323_channels);
indio_dev->modes = INDIO_DIRECT_MODE;
ret = cm3323_init(indio_dev);
if (ret < 0) {
dev_err(&client->dev, "cm3323 chip init failed\n");
return ret;
}
ret = devm_add_action_or_reset(&client->dev, cm3323_disable, indio_dev);
if (ret < 0)
return ret;
return devm_iio_device_register(&client->dev, indio_dev);
}
static const struct i2c_device_id cm3323_id[] = {
{"cm3323", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, cm3323_id);
static struct i2c_driver cm3323_driver = {
.driver = {
.name = CM3323_DRV_NAME,
},
.probe = cm3323_probe,
.id_table = cm3323_id,
};
module_i2c_driver(cm3323_driver);
MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>");
MODULE_DESCRIPTION("Capella CM3323 Color Light Sensor driver");
MODULE_LICENSE("GPL v2");