linux-imx

/*

 * CM3323 - Capella Color Light Sensor

 *

 * Copyright (c) 2015, Intel Corporation.

 *

 * This file is subject to the terms and conditions of version 2 of

 * the GNU General Public License.  See the file COPYING in the main

 * directory of this archive for more details.

 *

 * 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, \

}

​