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SubjectRe: [PATCH 1/1] Added Capella CM3218 Ambient Light Sensor IIO driver.
On 08/12/13 19:11, Peter Meerwald wrote:
>
>> drivers/iio/light/Kconfig | 10 +
>> drivers/iio/light/Makefile | 1 +
>> drivers/iio/light/cm3218.c | 589 +++++++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 600 insertions(+)
>> create mode 100644 drivers/iio/light/cm3218.c
>
> not much changed since last revision :(
> some comments inline...
>
>> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
>> index 5ef1a39..dd1ea80 100644
>> --- a/drivers/iio/light/Kconfig
>> +++ b/drivers/iio/light/Kconfig
>> @@ -15,6 +15,16 @@ config ADJD_S311
>> This driver can also be built as a module. If so, the module
>> will be called adjd_s311.
>>
>> +config SENSORS_CM3218
>> + tristate "CM3218 Ambient Light Sensor"
>> + depends on I2C
>> + help
>> + Say Y here if you have a Capella Micro CM3218 Ambient Light Sensor.
>> +
>> + To compile this driver as a module, choose M here. This module
>> + will be called to 'cm3218'. It will access ALS data via iio sysfs.
>
> will be called 'cm3218'. It will provide access to ALS data via iio
> sysfs.
>
>> + This is recommended.
>
> I think this should be dropped; or do you mean one should prefer the
> modules?
>
>> +
>> config SENSORS_LM3533
>> tristate "LM3533 ambient light sensor"
>> depends on MFD_LM3533
>> diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
>> index 040d9c7..c4ebe37 100644
>> --- a/drivers/iio/light/Makefile
>> +++ b/drivers/iio/light/Makefile
>> @@ -3,6 +3,7 @@
>> #
>>
>> obj-$(CONFIG_ADJD_S311) += adjd_s311.o
>> +obj-$(CONFIG_SENSORS_CM3218) += cm3218.o
>> obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o
>> obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
>> obj-$(CONFIG_VCNL4000) += vcnl4000.o
>> diff --git a/drivers/iio/light/cm3218.c b/drivers/iio/light/cm3218.c
>> new file mode 100644
>> index 0000000..1989fbb
>> --- /dev/null
>> +++ b/drivers/iio/light/cm3218.c
>> @@ -0,0 +1,589 @@
>> +/*
>> + * A iio driver for CM3218 Ambient Light Sensor.
>> + *
>> + * IIO driver for monitoring ambient light intensity in lux.
>> + *
>> + * Copyright (c) 2013, Capella Microsystems Inc.
>> + *
>> + * This program is free software; you can redistribute it and/or modify
>> + * it under the terms of the GNU General Public License as published by
>> + * the Free Software Foundation; either version 2 of the License, or
>> + * (at your option) any later version.
>> + *
>> + * This program is distributed in the hope that it will be useful, but WITHOUT
>> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> + * more details.
>> + *
>> + * You should have received a copy of the GNU General Public License along
>> + * with this program; if not, write to the Free Software Foundation, Inc.,
>> + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/i2c.h>
>> +#include <linux/err.h>
>> +#include <linux/mutex.h>
>> +#include <linux/slab.h>
>> +
>> +#if 0 /* ChromeOS still uses old API */
>> +#include "../iio.h"
>> +#include "../sysfs.h"
>> +#define IIO_DEVICE_ALLOC iio_allocate_device
>> +#define IIO_DEVICE_FREE iio_free_device
>> +#else
>
> old kernels are not supported; drop this and use the correct funtion
> directly
>
> maybe you want to use devm_iio_device_alloc() introduced recently?
Definitely given you will be rerolling the driver anyway.

>
>> +#include <linux/iio/iio.h>
>> +#include <linux/iio/sysfs.h>
>> +#define IIO_DEVICE_ALLOC iio_device_alloc
>> +#define IIO_DEVICE_FREE iio_device_free
>> +#endif /* 0 */
>> +
>> +/*
>> + * SMBus ARA address
>> + */
>> +#define CM3218_ADDR_ARA 0x0C
>> +
>> +/*
>> + * CM3218 CMD Registers
>> + */
>> +#define CM3218_REG_ADDR_CMD 0x00
>> +#define CM3218_CMD_ALS_SD 0x0001
>> +#define CM3218_CMD_ALS_INT_EN 0x0002
>> +#define CM3218_CMD_ALS_IT_SHIFT 6
>> +#define CM3218_CMD_ALS_IT_MASK (3 << CM3218_CMD_ALS_IT_SHIFT)
>> +#define CM3218_CMD_ALS_IT_05T (0 << CM3218_CMD_ALS_IT_SHIFT)
>> +#define CM3218_CMD_ALS_IT_1T (1 << CM3218_CMD_ALS_IT_SHIFT)
>> +#define CM3218_CMD_ALS_IT_2T (2 << CM3218_CMD_ALS_IT_SHIFT)
>> +#define CM3218_CMD_ALS_IT_4T (3 << CM3218_CMD_ALS_IT_SHIFT)
>> +#define CM3218_DEFAULT_CMD (CM3218_CMD_ALS_IT_1T)
>
> parenthesis not necessary here: (CM3218_CMD_ALS_IT_1T)
>
>> +
>> +#define CM3218_REG_ADDR_ALS_WH 0x01
>> +#define CM3218_DEFAULT_ALS_WH 0xFFFF
>> +
>> +#define CM3218_REG_ADDR_ALS_WL 0x02
>> +#define CM3218_DEFAULT_ALS_WL 0x0000
>> +
>> +#define CM3218_REG_ADDR_ALS 0x04
>> +
>> +#define CM3218_REG_ADDR_STATUS 0x06
>> +
>> +#define CM3218_REG_ADDR_ID 0x07
>> +
>> +/*
>> + * Software Parameters
>> + */
>
> single line comment: /* Software Parameters */
>
>> +#define CM3218_MAX_CACHE_REGS (0x03+1) /* Reg.0x00 to 0x03 */
>> +
>> +/*
>> + * Features
>> + */
>
> single line comment
>
>> +#define CM3218_DEBUG
>> +
>> +static const unsigned short normal_i2c[] = {
>> + 0x10, 0x48, I2C_CLIENT_END };
>> +
>> +struct cm3218_chip {
>> + struct i2c_client *client;
>> + struct mutex lock;
>> + unsigned int lensfactor;
>> + bool suspended;
>> + u16 reg_cache[CM3218_MAX_CACHE_REGS];
>> +};
>> +
>> +static int cm3218_read_ara(struct i2c_client *client)
>> +{
>> + int status;
>> + unsigned short addr;
>> +
>> + addr = client->addr;
>> + client->addr = CM3218_ADDR_ARA;
>> + status = i2c_smbus_read_byte(client);
>> + client->addr = addr;
>> +
>> + if (status < 0)
>> + return -ENODEV;
>> +
>> + return 0;
>> +}
>> +
>> +static int cm3218_write(struct i2c_client *client, u8 reg, u16 value)
>> +{
>> + int ret;
>> + struct cm3218_chip *chip = iio_priv(i2c_get_clientdata(client));
>> +
>> +#ifdef CM3218_DEBUG
>> + dev_err(&client->dev,
>> + "Write to device register 0x%02X with 0x%04X\n", reg, value);
>
> dev_dbg()?
>
>> +#endif /* CM3218_DEBUG */
>> + ret = i2c_smbus_write_word_data(client, reg, value);
>> + if (ret) {
>
> ret < 0?
>
>> + dev_err(&client->dev, "Write to device fails: 0x%x\n", ret);
>> + } else {
>> + /* Update cache */
>> + if (reg < CM3218_MAX_CACHE_REGS)
>> + chip->reg_cache[reg] = value;
>> + }
>> +
>> + return ret;
>> +}
>> +
>> +static int cm3218_read(struct i2c_client *client, u8 reg)
>> +{
>> + int status;
>> + struct cm3218_chip *chip = iio_priv(i2c_get_clientdata(client));
>> +
>> + if (reg < CM3218_MAX_CACHE_REGS) {
>> + status = chip->reg_cache[reg];
>> + } else {
>> + status = i2c_smbus_read_word_data(client, reg);
>> + if (status < 0) {
>> + dev_err(&client->dev,
>> + "Error in reading Reg.0x%02X\n", reg);
>> + return status;
>
> return not needed here
>
>> + }
>> +#ifdef CM3218_DEBUG
>> + dev_err(&client->dev,
>> + "Read from device register 0x%02X = 0x%04X\n",
>> + reg, status);
>> +#endif /* CM3218_DEBUG */
>> + }
>> +
>> + return status;
>> +}
>> +
>> +static int cm3218_read_sensor_input(struct i2c_client *client)
>> +{
>> + int status;
>> +
>> + status = cm3218_read(client, CM3218_REG_ADDR_ALS);
>> + if (status < 0)
>> + return status;
>> +
>> + dev_vdbg(&client->dev, "lux = %u\n", status);
>> +
>> + return status;
>> +}
>
> drop this function and inline into read_lux()
>
>> +
>> +static int cm3218_read_lux(struct i2c_client *client, int *lux)
>> +{
>> + struct cm3218_chip *chip = iio_priv(i2c_get_clientdata(client));
>> + int lux_data;
>> +
>> + lux_data = cm3218_read_sensor_input(client);
>> +
>> + if (lux_data < 0)
>> + return lux_data;
>> +
>> + *lux = lux_data * chip->lensfactor;
>> + *lux /= 1000;
>> + return 0;
>> +}
>> +
>> +/* Sysfs interface */
>> +/* lensfactor */
>
> use multi-line comment
>
>> +static ssize_t show_lensfactor(struct device *dev,
>> + struct device_attribute *attr, char *buf)
>> +{
>> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>
> struct cm3218_chip *chip = iio_priv(dev_get_drvdata(dev));
>
>> +
>> + return sprintf(buf, "%d\n", chip->lensfactor);
>> +}
>
> you don't need this, handled by channel read/write below
>
>> +
>> +static ssize_t store_lensfactor(struct device *dev,
>> + struct device_attribute *attr, const char *buf, size_t count)
>> +{
>> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>> + unsigned long lval;
>> +
>> + if (kstrtoul(buf, 10, &lval))
>> + return -EINVAL;
>> +
>> + mutex_lock(&chip->lock);
>> + chip->lensfactor = lval;
>> + mutex_unlock(&chip->lock);
>> +
>> + return count;
>> +}
>
> you don't need this, handled by channel read/write below
> no range checking??
>
>> +
>> +static ssize_t get_sensor_data(struct device *dev, char *buf)
>> +{
>> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>> + struct i2c_client *client = chip->client;
>> + int value = 0;
>> + int status;
>> +
>> + mutex_lock(&chip->lock);
>> + if (chip->suspended) {
>> + mutex_unlock(&chip->lock);
>> + return -EBUSY;
>> + }
>> +
>> + status = cm3218_read_lux(client, &value);
>
> extra space at beginning of line
>
>> +
>> + if (status < 0) {
>> + dev_err(&client->dev, "Error in Reading data");
>
> reading
>
>> + mutex_unlock(&chip->lock);
>> + return status;
>> + }
>> +
>> + mutex_unlock(&chip->lock);
>> +
>> + return sprintf(buf, "%d\n", value);
>> +}
>> +
>> +
>> +/* Read lux */
>> +static ssize_t show_lux(struct device *dev,
>> + struct device_attribute *devattr, char *buf)
>> +{
>> + return get_sensor_data(dev, buf);
>> +}
>
> drop this; use channels to present data
>
>> +
>> +#ifdef CM3218_DEBUG
>> +/* windows_high */
>> +static ssize_t show_cmd(struct device *dev,
>> + struct device_attribute *attr, char *buf)
>> +{
>> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>> + struct i2c_client *client = chip->client;
>> + int status;
>> +
>> + status = cm3218_read(client, CM3218_REG_ADDR_CMD);
>> + if (status < 0) {
>> + dev_err(dev, "Error in getting CM3218_REG_ADDR_CMD\n");
>> + return status;
>> + }
>> +
>> + return sprintf(buf, "%u\n", status);
>> +}
>
> I'd rather drop the debugging stuff; you could use
> probably use iio_info.debugfs_reg_access:
>
>> +
>> +static ssize_t store_cmd(struct device *dev,
>> + struct device_attribute *attr, const char *buf, size_t count)
>> +{
>> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>> + struct i2c_client *client = chip->client;
>> + int status;
>> + unsigned long lval;
>> +
>> + if (kstrtoul(buf, 10, &lval))
>> + return -EINVAL;
>> +
>> + mutex_lock(&chip->lock);
>> + if (lval > 0x10000)
>
>> = maybe?
>
>> + lval = 0xFFFF;
>> + status = cm3218_write(client, CM3218_REG_ADDR_CMD, (u16)lval);
>> + if (status < 0) {
>> + mutex_unlock(&chip->lock);
>> + dev_err(dev, "Error in setting CM3218_REG_ADDR_CMD\n");
>> + return status;
>> + }
>> + mutex_unlock(&chip->lock);
>> +
>> + return count;
>> +}
>> +
>> +/* status */
>> +static ssize_t show_status(struct device *dev,
>> + struct device_attribute *attr, char *buf)
>> +{
>> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>> + struct i2c_client *client = chip->client;
>> + int status;
>> +
>> + status = cm3218_read(client, CM3218_REG_ADDR_STATUS);
>> + if (status < 0) {
>> + dev_err(dev, "Error in getting CM3218_REG_ADDR_STATUS\n");
>> + return status;
>> + }
>> +
>> + return sprintf(buf, "%u\n", status);
>> +}
>> +
>> +#endif /* CM3218_DEBUG */
>> +
>> +/* Channel IO */
>> +static int cm3218_write_raw(struct iio_dev *indio_dev,
>> + struct iio_chan_spec const *chan,
>> + int val,
>> + int val2,
>> + long mask)
>> +{
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>> + int ret = -EINVAL;
>
> ret is not used, only assigned
>
>> +
>> + mutex_lock(&chip->lock);
>> + if (mask == IIO_CHAN_INFO_CALIBSCALE && chan->type == IIO_LIGHT) {
>> + chip->lensfactor = val;
>> + ret = 0;
>> + }
>> + mutex_unlock(&chip->lock);
>> +
>> + return 0;
>> +}
>> +
>> +static int cm3218_read_raw(struct iio_dev *indio_dev,
>> + struct iio_chan_spec const *chan,
>> + int *val,
>> + int *val2,
>> + long mask)
>> +{
>> + int ret = -EINVAL;
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>> + struct i2c_client *client = chip->client;
>> +
>> + mutex_lock(&chip->lock);
>> + if (chip->suspended) {
>> + mutex_unlock(&chip->lock);
>> + return -EBUSY;
>> + }
>> + switch (mask) {
>> + case 0:
>
> INFO_RAW? or INFO_PROCESSED?
>
>> + ret = cm3218_read_lux(client, val);
>> + if (!ret)
>> + ret = IIO_VAL_INT;
>
> if (ret >= 0) ??
>
>> + break;
>> + case IIO_CHAN_INFO_CALIBSCALE:
>> + *val = chip->lensfactor;
>> + ret = IIO_VAL_INT_PLUS_MICRO;
>> + break;
>> + default:
>> + break;
>> + }
>> + mutex_unlock(&chip->lock);
>> + return ret;
>> +}
>> +
>> +#define IIO_CHAN_INFO_SEPARATE_BIT(type) BIT(type*2 + 1)
>> +#define IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT \
>> + IIO_CHAN_INFO_SEPARATE_BIT(IIO_CHAN_INFO_CALIBSCALE)
>
> only needed for old kernels
>
>> +
>> +static const struct iio_chan_spec cm3218_channels[] = {
>> + {
>> + .type = IIO_LIGHT,
>> + .indexed = 1,
>
> there is only one channel, no need to index
>
>> + .channel = 0,
>> + .info_mask = IIO_CHAN_INFO_CALIBSCALE_SEPARATE_BIT,
>
> INFO_RAW/PROCESSED?
>
>> + }
>> +};
>> +
>> +static IIO_DEVICE_ATTR(illuminance0_input, S_IRUGO, show_lux, NULL, 0);
>> +static IIO_DEVICE_ATTR(illuminance0_calibscale, S_IRUGO | S_IWUSR,
>> + show_lensfactor, store_lensfactor, 0);
>
>> +#ifdef CM3218_DEBUG
>> +static IIO_DEVICE_ATTR(cmd, S_IRUGO | S_IWUSR, show_cmd, store_cmd, 0);
>> +static IIO_DEVICE_ATTR(status, S_IRUGO, show_status, NULL, 0);
>> +#endif /* CM3218_DEBUG */
>> +
>> +#define CM3218_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr)
>> +#define CM3218_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr)
>> +static struct attribute *cm3218_attributes[] = {
>> + CM3218_DEV_ATTR(illuminance0_input),
>> + CM3218_DEV_ATTR(illuminance0_calibscale),
>> +#ifdef CM3218_DEBUG
>> + CM3218_DEV_ATTR(cmd),
>> + CM3218_DEV_ATTR(status),
>> +#endif /* CM3218_DEBUG */
>> + NULL
>> +};
>> +
>> +static const struct attribute_group cm3218_group = {
>> + .attrs = cm3218_attributes,
>> +};
>> +
>> +static int cm3218_chip_init(struct i2c_client *client)
>> +{
>> + struct cm3218_chip *chip = iio_priv(i2c_get_clientdata(client));
>> + int status, i;
>> +
>> + memset(chip->reg_cache, 0, sizeof(chip->reg_cache));
>> +
>> + for (i = 0; i < 5; i++) {
>> + status = cm3218_write(client, CM3218_REG_ADDR_CMD,
>> + CM3218_CMD_ALS_SD);
>> + if (status >= 0)
>> + break;
>> + cm3218_read_ara(client);
>
> why 5 times? no sleep?
>
>> + }
>> +
>> + status = cm3218_write(client, CM3218_REG_ADDR_CMD, CM3218_DEFAULT_CMD);
>> + if (status < 0) {
>> + dev_err(&client->dev, "Init CM3218 CMD fails\n");
>> + return status;
>> + }
>> +
>> +
>> + /* Clean interrupt status */
>> + cm3218_read(client, CM3218_REG_ADDR_STATUS);
>> +
>> + return 0;
>> +}
>> +
>> +static const struct iio_info cm3218_info = {
>> + .attrs = &cm3218_group,
>> + .driver_module = THIS_MODULE,
>> + .read_raw = &cm3218_read_raw,
>> + .write_raw = &cm3218_write_raw,
>> +};
>> +
>> +static int cm3218_probe(struct i2c_client *client,
>> + const struct i2c_device_id *id)
>> +{
>> + struct cm3218_chip *chip;
>> + struct iio_dev *indio_dev;
>> + int err;
>> +
>> + indio_dev = IIO_DEVICE_ALLOC(sizeof(*chip));
>> + if (indio_dev == NULL) {
>> + dev_err(&client->dev, "iio allocation fails\n");
>
> drop error msg
>
>> + err = -ENOMEM;
>> + goto exit;
>> + }
>> + chip = iio_priv(indio_dev);
>> + chip->client = client;
>> + i2c_set_clientdata(client, indio_dev);
>> +
>> + mutex_init(&chip->lock);
>> +
>> + chip->lensfactor = 1000;
>> + chip->suspended = false;
>> +
>> + err = cm3218_chip_init(client);
>> + if (err)
>> + goto exit_iio_free;
>> +
>> + indio_dev->info = &cm3218_info;
>> + indio_dev->channels = cm3218_channels;
>> + indio_dev->num_channels = ARRAY_SIZE(cm3218_channels);
>> + indio_dev->name = id->name;
>> + indio_dev->dev.parent = &client->dev;
>> + indio_dev->modes = INDIO_DIRECT_MODE;
>> + err = iio_device_register(indio_dev);
>> + if (err) {
>> + dev_err(&client->dev, "iio registration fails\n");
>> + goto exit_iio_free;
>> + }
>> +
>> + return 0;
>> +exit_iio_free:
>> + IIO_DEVICE_FREE(indio_dev);
>> +exit:
>> + return err;
>> +}
>> +
>> +static int cm3218_detect(struct i2c_client *client,
>> + struct i2c_board_info *info)
>> +{
>> + struct i2c_adapter *adapter = client->adapter;
>> + const char *name = NULL;
>> + int id;
>> +
>> + cm3218_read_ara(client);
>> +
>> + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
>> + return -ENODEV;
>> +
>> + id = cm3218_read(client, CM3218_REG_ADDR_ID);
>> + if (id < 0)
>> + return -ENODEV;
>> +
>> + switch (id&0xFF) {
>> + case 0x18:
>> + name = "cm3218";
>> + break;
>> + default:
>> + return -ENODEV;
>> + }
>> +
>> + strlcpy(info->type, name, I2C_NAME_SIZE);
>> +
>> + return 0;
>> +}
>
> drop detect code
>
>> +
>> +static int cm3218_remove(struct i2c_client *client)
>> +{
>> + struct iio_dev *indio_dev = i2c_get_clientdata(client);
>> +
>> + dev_dbg(&client->dev, "%s()\n", __func__);
>> + iio_device_unregister(indio_dev);
>> + IIO_DEVICE_FREE(indio_dev);
>> +
>> + return 0;
>> +}
>> +
>> +#ifdef CONFIG_PM_SLEEP
>> +static int cm3218_suspend(struct device *dev)
>> +{
>> + struct cm3218_chip *chip = iio_priv(dev_get_drvdata(dev));
>> +
>> + mutex_lock(&chip->lock);
>> +
>> + /* Since this driver uses only polling commands, we are by default in
>> + * auto shutdown (ie, power-down) mode.
>> + * So we do not have much to do here.
>> + */
>> + chip->suspended = true;
>> +
>> + mutex_unlock(&chip->lock);
>> + return 0;
>> +}
>> +
>> +static int cm3218_resume(struct device *dev)
>> +{
>> + struct iio_dev *indio_dev = dev_get_drvdata(dev);
>> + struct cm3218_chip *chip = iio_priv(indio_dev);
>> + struct i2c_client *client = chip->client;
>> + int err;
>> +
>> + mutex_lock(&chip->lock);
>> +
>> + err = cm3218_chip_init(client);
>> + if (!err)
>> + chip->suspended = false;
>> +
>> + mutex_unlock(&chip->lock);
>> + return err;
>> +}
>> +
>> +static SIMPLE_DEV_PM_OPS(cm3218_pm_ops, cm3218_suspend, cm3218_resume);
>> +#define CM3218_PM_OPS (&cm3218_pm_ops)
>> +#else
>> +#define CM3218_PM_OPS NULL
>> +#endif
>> +
>> +static const struct i2c_device_id cm3218_id[] = {
>> + {"cm3218", 0},
>> + {}
>> +};
>> +
>> +MODULE_DEVICE_TABLE(i2c, cm3218_id);
>> +
>> +static const struct of_device_id cm3218_of_match[] = {
>> + { .compatible = "invn,cm3218", },
>> + {}
>> +};
>> +MODULE_DEVICE_TABLE(of, cm3218_of_match);
>> +
>> +static struct i2c_driver cm3218_driver = {
>> + .class = I2C_CLASS_HWMON,
>> + .driver = {
>> + .name = "cm3218",
>> + .pm = CM3218_PM_OPS,
>> + .owner = THIS_MODULE,
>> + .of_match_table = cm3218_of_match,
>> + },
>> + .probe = cm3218_probe,
>> + .remove = cm3218_remove,
>> + .id_table = cm3218_id,
>> + .detect = cm3218_detect,
>> + .address_list = normal_i2c,
>> +};
>> +module_i2c_driver(cm3218_driver);
>> +
>> +MODULE_DESCRIPTION("CM3218 Ambient Light Sensor driver");
>> +MODULE_LICENSE("GPL");
>>
>


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