iio: cm36651: Add CM36651 proximity/light sensor
authorBeomho Seo <beomho.seo@samsung.com>
Thu, 17 Oct 2013 02:22:00 +0000 (03:22 +0100)
committerJonathan Cameron <jic23@kernel.org>
Thu, 17 Oct 2013 22:40:19 +0000 (23:40 +0100)
This patch adds a new driver for Capella CM36651 proximity and RGB sensor.

Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
drivers/iio/light/Kconfig
drivers/iio/light/Makefile
drivers/iio/light/cm36651.c [new file with mode: 0644]

index 0a25ae6b132ec5c0fd26a46fb1f89df403ae08c7..f98c2b509254e2b8fdce8cd77db408f11b244495 100644 (file)
@@ -27,6 +27,17 @@ config APDS9300
         To compile this driver as a module, choose M here: the
         module will be called apds9300.
 
+config CM36651
+       depends on I2C
+       tristate "CM36651 driver"
+       help
+        Say Y here if you use cm36651.
+        This option enables proximity & RGB sensor using
+        Capella cm36651 device driver.
+
+        To compile this driver as a module, choose M here:
+        the module will be called cm36651.
+
 config GP2AP020A00F
        tristate "Sharp GP2AP020A00F Proximity/ALS sensor"
        depends on I2C
index cef590f2ff00462010e7054074a7d066a583a265..daa327f39e04e71923e514320e081bab337633d2 100644 (file)
@@ -5,6 +5,7 @@
 # When adding new entries keep the list in alphabetical order
 obj-$(CONFIG_ADJD_S311)                += adjd_s311.o
 obj-$(CONFIG_APDS9300)         += apds9300.o
+obj-$(CONFIG_CM36651)          += cm36651.o
 obj-$(CONFIG_GP2AP020A00F)     += gp2ap020a00f.o
 obj-$(CONFIG_HID_SENSOR_ALS)   += hid-sensor-als.o
 obj-$(CONFIG_SENSORS_LM3533)   += lm3533-als.o
diff --git a/drivers/iio/light/cm36651.c b/drivers/iio/light/cm36651.c
new file mode 100644 (file)
index 0000000..21df571
--- /dev/null
@@ -0,0 +1,708 @@
+/*
+ * Copyright (C) 2013 Samsung Electronics Co., Ltd.
+ * Author: Beomho Seo <beomho.seo@samsung.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General Public License version 2, as published
+ * by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/regulator/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+
+/* Slave address 0x19 for PS of 7 bit addressing protocol for I2C */
+#define CM36651_I2C_ADDR_PS            0x19
+/* Alert Response Address */
+#define CM36651_ARA                    0x0C
+
+/* Ambient light sensor */
+#define CM36651_CS_CONF1               0x00
+#define CM36651_CS_CONF2               0x01
+#define CM36651_ALS_WH_M               0x02
+#define CM36651_ALS_WH_L               0x03
+#define CM36651_ALS_WL_M               0x04
+#define CM36651_ALS_WL_L               0x05
+#define CM36651_CS_CONF3               0x06
+#define CM36651_CS_CONF_REG_NUM                0x02
+
+/* Proximity sensor */
+#define CM36651_PS_CONF1               0x00
+#define CM36651_PS_THD                 0x01
+#define CM36651_PS_CANC                        0x02
+#define CM36651_PS_CONF2               0x03
+#define CM36651_PS_REG_NUM             0x04
+
+/* CS_CONF1 command code */
+#define CM36651_ALS_ENABLE             0x00
+#define CM36651_ALS_DISABLE            0x01
+#define CM36651_ALS_INT_EN             0x02
+#define CM36651_ALS_THRES              0x04
+
+/* CS_CONF2 command code */
+#define CM36651_CS_CONF2_DEFAULT_BIT   0x08
+
+/* CS_CONF3 channel integration time */
+#define CM36651_CS_IT1                 0x00 /* Integration time 80000 usec */
+#define CM36651_CS_IT2                 0x40 /* Integration time 160000 usec */
+#define CM36651_CS_IT3                 0x80 /* Integration time 320000 usec */
+#define CM36651_CS_IT4                 0xC0 /* Integration time 640000 usec */
+
+/* PS_CONF1 command code */
+#define CM36651_PS_ENABLE              0x00
+#define CM36651_PS_DISABLE             0x01
+#define CM36651_PS_INT_EN              0x02
+#define CM36651_PS_PERS2               0x04
+#define CM36651_PS_PERS3               0x08
+#define CM36651_PS_PERS4               0x0C
+
+/* PS_CONF1 command code: integration time */
+#define CM36651_PS_IT1                 0x00 /* Integration time 320 usec */
+#define CM36651_PS_IT2                 0x10 /* Integration time 420 usec */
+#define CM36651_PS_IT3                 0x20 /* Integration time 520 usec */
+#define CM36651_PS_IT4                 0x30 /* Integration time 640 usec */
+
+/* PS_CONF1 command code: duty ratio */
+#define CM36651_PS_DR1                 0x00 /* Duty ratio 1/80 */
+#define CM36651_PS_DR2                 0x40 /* Duty ratio 1/160 */
+#define CM36651_PS_DR3                 0x80 /* Duty ratio 1/320 */
+#define CM36651_PS_DR4                 0xC0 /* Duty ratio 1/640 */
+
+/* PS_THD command code */
+#define CM36651_PS_INITIAL_THD         0x05
+
+/* PS_CANC command code */
+#define CM36651_PS_CANC_DEFAULT                0x00
+
+/* PS_CONF2 command code */
+#define CM36651_PS_HYS1                        0x00
+#define CM36651_PS_HYS2                        0x01
+#define CM36651_PS_SMART_PERS_EN       0x02
+#define CM36651_PS_DIR_INT             0x04
+#define CM36651_PS_MS                  0x10
+
+#define CM36651_CS_COLOR_NUM           4
+
+#define CM36651_CLOSE_PROXIMITY                0x32
+#define CM36651_FAR_PROXIMITY                  0x33
+
+#define CM36651_CS_INT_TIME_AVAIL      "80000 160000 320000 640000"
+#define CM36651_PS_INT_TIME_AVAIL      "320 420 520 640"
+
+enum cm36651_operation_mode {
+       CM36651_LIGHT_EN,
+       CM36651_PROXIMITY_EN,
+       CM36651_PROXIMITY_EV_EN,
+};
+
+enum cm36651_light_channel_idx {
+       CM36651_LIGHT_CHANNEL_IDX_RED,
+       CM36651_LIGHT_CHANNEL_IDX_GREEN,
+       CM36651_LIGHT_CHANNEL_IDX_BLUE,
+       CM36651_LIGHT_CHANNEL_IDX_CLEAR,
+};
+
+enum cm36651_command {
+       CM36651_CMD_READ_RAW_LIGHT,
+       CM36651_CMD_READ_RAW_PROXIMITY,
+       CM36651_CMD_PROX_EV_EN,
+       CM36651_CMD_PROX_EV_DIS,
+};
+
+static const u8 cm36651_cs_reg[CM36651_CS_CONF_REG_NUM] = {
+       CM36651_CS_CONF1,
+       CM36651_CS_CONF2,
+};
+
+static const u8 cm36651_ps_reg[CM36651_PS_REG_NUM] = {
+       CM36651_PS_CONF1,
+       CM36651_PS_THD,
+       CM36651_PS_CANC,
+       CM36651_PS_CONF2,
+};
+
+struct cm36651_data {
+       const struct cm36651_platform_data *pdata;
+       struct i2c_client *client;
+       struct i2c_client *ps_client;
+       struct i2c_client *ara_client;
+       struct mutex lock;
+       struct regulator *vled_reg;
+       unsigned long flags;
+       int cs_int_time[CM36651_CS_COLOR_NUM];
+       int ps_int_time;
+       u8 cs_ctrl_regs[CM36651_CS_CONF_REG_NUM];
+       u8 ps_ctrl_regs[CM36651_PS_REG_NUM];
+       u16 color[CM36651_CS_COLOR_NUM];
+};
+
+static int cm36651_setup_reg(struct cm36651_data *cm36651)
+{
+       struct i2c_client *client = cm36651->client;
+       struct i2c_client *ps_client = cm36651->ps_client;
+       int i, ret;
+
+       /* CS initialization */
+       cm36651->cs_ctrl_regs[CM36651_CS_CONF1] = CM36651_ALS_ENABLE |
+                                                            CM36651_ALS_THRES;
+       cm36651->cs_ctrl_regs[CM36651_CS_CONF2] = CM36651_CS_CONF2_DEFAULT_BIT;
+
+       for (i = 0; i < CM36651_CS_CONF_REG_NUM; i++) {
+               ret = i2c_smbus_write_byte_data(client, cm36651_cs_reg[i],
+                                                    cm36651->cs_ctrl_regs[i]);
+               if (ret < 0)
+                       return ret;
+       }
+
+       /* PS initialization */
+       cm36651->ps_ctrl_regs[CM36651_PS_CONF1] = CM36651_PS_ENABLE |
+                                                               CM36651_PS_IT2;
+       cm36651->ps_ctrl_regs[CM36651_PS_THD] = CM36651_PS_INITIAL_THD;
+       cm36651->ps_ctrl_regs[CM36651_PS_CANC] = CM36651_PS_CANC_DEFAULT;
+       cm36651->ps_ctrl_regs[CM36651_PS_CONF2] = CM36651_PS_HYS2 |
+                               CM36651_PS_DIR_INT | CM36651_PS_SMART_PERS_EN;
+
+       for (i = 0; i < CM36651_PS_REG_NUM; i++) {
+               ret = i2c_smbus_write_byte_data(ps_client, cm36651_ps_reg[i],
+                                                    cm36651->ps_ctrl_regs[i]);
+               if (ret < 0)
+                       return ret;
+       }
+
+       /* Set shutdown mode */
+       ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+                                                         CM36651_ALS_DISABLE);
+       if (ret < 0)
+               return ret;
+
+       ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+                                        CM36651_PS_CONF1, CM36651_PS_DISABLE);
+       if (ret < 0)
+               return ret;
+
+       return 0;
+}
+
+static int cm36651_read_output(struct cm36651_data *cm36651,
+                               struct iio_chan_spec const *chan, int *val)
+{
+       struct i2c_client *client = cm36651->client;
+       int ret = -EINVAL;
+
+       switch (chan->type) {
+       case IIO_LIGHT:
+               *val = i2c_smbus_read_word_data(client, chan->address);
+               if (*val < 0)
+                       return ret;
+
+               ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+                                                       CM36651_ALS_DISABLE);
+               if (ret < 0)
+                       return ret;
+
+               ret = IIO_VAL_INT;
+               break;
+       case IIO_PROXIMITY:
+               *val = i2c_smbus_read_byte(cm36651->ps_client);
+               if (*val < 0)
+                       return ret;
+
+               if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) {
+                       ret = i2c_smbus_write_byte_data(cm36651->ps_client,
+                                       CM36651_PS_CONF1, CM36651_PS_DISABLE);
+                       if (ret < 0)
+                               return ret;
+               }
+
+               ret = IIO_VAL_INT;
+               break;
+       default:
+               break;
+       }
+
+       return ret;
+}
+
+static irqreturn_t cm36651_irq_handler(int irq, void *data)
+{
+       struct iio_dev *indio_dev = data;
+       struct cm36651_data *cm36651 = iio_priv(indio_dev);
+       struct i2c_client *client = cm36651->client;
+       int ev_dir, ret;
+       u64 ev_code;
+
+       /*
+        * The PS INT pin is an active low signal that PS INT move logic low
+        * when the object is detect. Once the MCU host received the PS INT
+        * "LOW" signal, the Host needs to read the data at Alert Response
+        * Address(ARA) to clear the PS INT signal. After clearing the PS
+        * INT pin, the PS INT signal toggles from low to high.
+        */
+       ret = i2c_smbus_read_byte(cm36651->ara_client);
+       if (ret < 0) {
+               dev_err(&client->dev,
+                               "%s: Data read failed: %d\n", __func__, ret);
+               return IRQ_HANDLED;
+       }
+       switch (ret) {
+       case CM36651_CLOSE_PROXIMITY:
+               ev_dir = IIO_EV_DIR_RISING;
+               break;
+       case CM36651_FAR_PROXIMITY:
+               ev_dir = IIO_EV_DIR_FALLING;
+               break;
+       default:
+               dev_err(&client->dev,
+                       "%s: Data read wrong: %d\n", __func__, ret);
+               return IRQ_HANDLED;
+       }
+
+       ev_code = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY,
+                               CM36651_CMD_READ_RAW_PROXIMITY,
+                               IIO_EV_TYPE_THRESH, ev_dir);
+
+       iio_push_event(indio_dev, ev_code, iio_get_time_ns());
+
+       return IRQ_HANDLED;
+}
+
+static int cm36651_set_operation_mode(struct cm36651_data *cm36651, int cmd)
+{
+       struct i2c_client *client = cm36651->client;
+       struct i2c_client *ps_client = cm36651->ps_client;
+       int ret = -EINVAL;
+
+       switch (cmd) {
+       case CM36651_CMD_READ_RAW_LIGHT:
+               ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF1,
+                               cm36651->cs_ctrl_regs[CM36651_CS_CONF1]);
+               break;
+       case CM36651_CMD_READ_RAW_PROXIMITY:
+               if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags))
+                       return CM36651_PROXIMITY_EV_EN;
+
+               ret = i2c_smbus_write_byte_data(ps_client, CM36651_PS_CONF1,
+                               cm36651->ps_ctrl_regs[CM36651_PS_CONF1]);
+               break;
+       case CM36651_CMD_PROX_EV_EN:
+               if (test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) {
+                       dev_err(&client->dev,
+                               "Already proximity event enable state\n");
+                       return ret;
+               }
+               set_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+
+               ret = i2c_smbus_write_byte_data(ps_client,
+                       cm36651_ps_reg[CM36651_PS_CONF1],
+                       CM36651_PS_INT_EN | CM36651_PS_PERS2 | CM36651_PS_IT2);
+
+               if (ret < 0) {
+                       dev_err(&client->dev, "Proximity enable event failed\n");
+                       return ret;
+               }
+               break;
+       case CM36651_CMD_PROX_EV_DIS:
+               if (!test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags)) {
+                       dev_err(&client->dev,
+                               "Already proximity event disable state\n");
+                       return ret;
+               }
+               clear_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+               ret = i2c_smbus_write_byte_data(ps_client,
+                                       CM36651_PS_CONF1, CM36651_PS_DISABLE);
+               break;
+       }
+
+       if (ret < 0)
+               dev_err(&client->dev, "Write register failed\n");
+
+       return ret;
+}
+
+static int cm36651_read_channel(struct cm36651_data *cm36651,
+                               struct iio_chan_spec const *chan, int *val)
+{
+       struct i2c_client *client = cm36651->client;
+       int cmd, ret;
+
+       if (chan->type == IIO_LIGHT)
+               cmd = CM36651_CMD_READ_RAW_LIGHT;
+       else if (chan->type == IIO_PROXIMITY)
+               cmd = CM36651_CMD_READ_RAW_PROXIMITY;
+       else
+               return -EINVAL;
+
+       ret = cm36651_set_operation_mode(cm36651, cmd);
+       if (ret < 0) {
+               dev_err(&client->dev, "CM36651 set operation mode failed\n");
+               return ret;
+       }
+       /* Delay for work after enable operation */
+       msleep(50);
+       ret = cm36651_read_output(cm36651, chan, val);
+       if (ret < 0) {
+               dev_err(&client->dev, "CM36651 read output failed\n");
+               return ret;
+       }
+
+       return ret;
+}
+
+static int cm36651_read_int_time(struct cm36651_data *cm36651,
+                               struct iio_chan_spec const *chan, int *val)
+{
+       switch (chan->type) {
+       case IIO_LIGHT:
+               if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT1)
+                       *val = 80000;
+               else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT2)
+                       *val = 160000;
+               else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT3)
+                       *val = 320000;
+               else if (cm36651->cs_int_time[chan->address] == CM36651_CS_IT4)
+                       *val = 640000;
+               else
+                       return -EINVAL;
+               break;
+       case IIO_PROXIMITY:
+               if (cm36651->ps_int_time == CM36651_PS_IT1)
+                       *val = 320;
+               else if (cm36651->ps_int_time == CM36651_PS_IT2)
+                       *val = 420;
+               else if (cm36651->ps_int_time == CM36651_PS_IT3)
+                       *val = 520;
+               else if (cm36651->ps_int_time == CM36651_PS_IT4)
+                       *val = 640;
+               else
+                       return -EINVAL;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return IIO_VAL_INT_PLUS_MICRO;
+}
+
+static int cm36651_write_int_time(struct cm36651_data *cm36651,
+                               struct iio_chan_spec const *chan, int val)
+{
+       struct i2c_client *client = cm36651->client;
+       struct i2c_client *ps_client = cm36651->ps_client;
+       int int_time, ret;
+
+       switch (chan->type) {
+       case IIO_LIGHT:
+               if (val == 80000)
+                       int_time = CM36651_CS_IT1;
+               else if (val == 160000)
+                       int_time = CM36651_CS_IT2;
+               else if (val == 320000)
+                       int_time = CM36651_CS_IT3;
+               else if (val == 640000)
+                       int_time = CM36651_CS_IT4;
+               else
+                       return -EINVAL;
+
+               ret = i2c_smbus_write_byte_data(client, CM36651_CS_CONF3,
+                                          int_time >> 2 * (chan->address));
+               if (ret < 0) {
+                       dev_err(&client->dev, "CS integration time write failed\n");
+                       return ret;
+               }
+               cm36651->cs_int_time[chan->address] = int_time;
+               break;
+       case IIO_PROXIMITY:
+               if (val == 320)
+                       int_time = CM36651_PS_IT1;
+               else if (val == 420)
+                       int_time = CM36651_PS_IT2;
+               else if (val == 520)
+                       int_time = CM36651_PS_IT3;
+               else if (val == 640)
+                       int_time = CM36651_PS_IT4;
+               else
+                       return -EINVAL;
+
+               ret = i2c_smbus_write_byte_data(ps_client,
+                                               CM36651_PS_CONF1, int_time);
+               if (ret < 0) {
+                       dev_err(&client->dev, "PS integration time write failed\n");
+                       return ret;
+               }
+               cm36651->ps_int_time = int_time;
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return ret;
+}
+
+static int cm36651_read_raw(struct iio_dev *indio_dev,
+                           struct iio_chan_spec const *chan,
+                           int *val, int *val2, long mask)
+{
+       struct cm36651_data *cm36651 = iio_priv(indio_dev);
+       int ret;
+
+       mutex_lock(&cm36651->lock);
+
+       switch (mask) {
+       case IIO_CHAN_INFO_RAW:
+               ret = cm36651_read_channel(cm36651, chan, val);
+               break;
+       case IIO_CHAN_INFO_INT_TIME:
+               ret = cm36651_read_int_time(cm36651, chan, val);
+               break;
+       default:
+               ret = -EINVAL;
+       }
+
+       mutex_unlock(&cm36651->lock);
+
+       return ret;
+}
+
+static int cm36651_write_raw(struct iio_dev *indio_dev,
+                            struct iio_chan_spec const *chan,
+                            int val, int val2, long mask)
+{
+       struct cm36651_data *cm36651 = iio_priv(indio_dev);
+       struct i2c_client *client = cm36651->client;
+       int ret = -EINVAL;
+
+       if (mask == IIO_CHAN_INFO_INT_TIME) {
+               ret = cm36651_write_int_time(cm36651, chan, val);
+               if (ret < 0)
+                       dev_err(&client->dev, "Integration time write failed\n");
+       }
+
+       return ret;
+}
+
+static int cm36651_read_prox_thresh(struct iio_dev *indio_dev,
+                                       u64 event_code, int *val)
+{
+       struct cm36651_data *cm36651 = iio_priv(indio_dev);
+
+       *val = cm36651->ps_ctrl_regs[CM36651_PS_THD];
+
+       return 0;
+}
+
+static int cm36651_write_prox_thresh(struct iio_dev *indio_dev,
+                                       u64 event_code, int val)
+{
+       struct cm36651_data *cm36651 = iio_priv(indio_dev);
+       struct i2c_client *client = cm36651->client;
+       int ret;
+
+       if (val < 3 || val > 255)
+               return -EINVAL;
+
+       cm36651->ps_ctrl_regs[CM36651_PS_THD] = val;
+       ret = i2c_smbus_write_byte_data(cm36651->ps_client, CM36651_PS_THD,
+                                       cm36651->ps_ctrl_regs[CM36651_PS_THD]);
+
+       if (ret < 0) {
+               dev_err(&client->dev, "PS threshold write failed: %d\n", ret);
+               return ret;
+       }
+
+       return 0;
+}
+
+static int cm36651_write_prox_event_config(struct iio_dev *indio_dev,
+                                       u64 event_code, int state)
+{
+       struct cm36651_data *cm36651 = iio_priv(indio_dev);
+       int cmd, ret = -EINVAL;
+
+       mutex_lock(&cm36651->lock);
+
+       cmd = state ? CM36651_CMD_PROX_EV_EN : CM36651_CMD_PROX_EV_DIS;
+       ret = cm36651_set_operation_mode(cm36651, cmd);
+
+       mutex_unlock(&cm36651->lock);
+
+       return ret;
+}
+
+static int cm36651_read_prox_event_config(struct iio_dev *indio_dev,
+                                                       u64 event_code)
+{
+       struct cm36651_data *cm36651 = iio_priv(indio_dev);
+       int event_en;
+
+       mutex_lock(&cm36651->lock);
+
+       event_en = test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
+
+       mutex_unlock(&cm36651->lock);
+
+       return event_en;
+}
+
+#define CM36651_LIGHT_CHANNEL(_color, _idx) {          \
+       .type = IIO_LIGHT,                              \
+       .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |  \
+                       BIT(IIO_CHAN_INFO_INT_TIME),    \
+       .address = _idx,                                \
+       .modified = 1,                                  \
+       .channel2 = IIO_MOD_LIGHT_##_color,             \
+}                                                      \
+
+static const struct iio_chan_spec cm36651_channels[] = {
+       {
+               .type = IIO_PROXIMITY,
+               .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+                               BIT(IIO_CHAN_INFO_INT_TIME),
+               .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER)
+       },
+       CM36651_LIGHT_CHANNEL(RED, CM36651_LIGHT_CHANNEL_IDX_RED),
+       CM36651_LIGHT_CHANNEL(GREEN, CM36651_LIGHT_CHANNEL_IDX_GREEN),
+       CM36651_LIGHT_CHANNEL(BLUE, CM36651_LIGHT_CHANNEL_IDX_BLUE),
+       CM36651_LIGHT_CHANNEL(CLEAR, CM36651_LIGHT_CHANNEL_IDX_CLEAR),
+};
+
+static IIO_CONST_ATTR(in_illuminance_integration_time_available,
+                                       CM36651_CS_INT_TIME_AVAIL);
+static IIO_CONST_ATTR(in_proximity_integration_time_available,
+                                       CM36651_PS_INT_TIME_AVAIL);
+
+static struct attribute *cm36651_attributes[] = {
+       &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
+       &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr,
+       NULL,
+};
+
+static const struct attribute_group cm36651_attribute_group = {
+       .attrs = cm36651_attributes
+};
+
+static const struct iio_info cm36651_info = {
+       .driver_module          = THIS_MODULE,
+       .read_raw               = &cm36651_read_raw,
+       .write_raw              = &cm36651_write_raw,
+       .read_event_value       = &cm36651_read_prox_thresh,
+       .write_event_value      = &cm36651_write_prox_thresh,
+       .read_event_config      = &cm36651_read_prox_event_config,
+       .write_event_config     = &cm36651_write_prox_event_config,
+       .attrs                  = &cm36651_attribute_group,
+};
+
+static int cm36651_probe(struct i2c_client *client,
+                            const struct i2c_device_id *id)
+{
+       struct cm36651_data *cm36651;
+       struct iio_dev *indio_dev;
+       int ret;
+
+       indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*cm36651));
+       if (!indio_dev)
+               return -ENOMEM;
+
+       cm36651 = iio_priv(indio_dev);
+
+       cm36651->vled_reg = devm_regulator_get(&client->dev, "vled");
+       if (IS_ERR(cm36651->vled_reg)) {
+               dev_err(&client->dev, "get regulator vled failed\n");
+               return PTR_ERR(cm36651->vled_reg);
+       }
+
+       ret = regulator_enable(cm36651->vled_reg);
+       if (ret) {
+               dev_err(&client->dev, "enable regulator vled failed\n");
+               return ret;
+       }
+
+       i2c_set_clientdata(client, indio_dev);
+
+       cm36651->client = client;
+       cm36651->ps_client = i2c_new_dummy(client->adapter,
+                                                    CM36651_I2C_ADDR_PS);
+       cm36651->ara_client = i2c_new_dummy(client->adapter, CM36651_ARA);
+       mutex_init(&cm36651->lock);
+       indio_dev->dev.parent = &client->dev;
+       indio_dev->channels = cm36651_channels;
+       indio_dev->num_channels = ARRAY_SIZE(cm36651_channels);
+       indio_dev->info = &cm36651_info;
+       indio_dev->name = id->name;
+       indio_dev->modes = INDIO_DIRECT_MODE;
+
+       ret = cm36651_setup_reg(cm36651);
+       if (ret) {
+               dev_err(&client->dev, "%s: register setup failed\n", __func__);
+               goto error_disable_reg;
+       }
+
+       ret = request_threaded_irq(client->irq, NULL, cm36651_irq_handler,
+                                       IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+                                                       "cm36651", indio_dev);
+       if (ret) {
+               dev_err(&client->dev, "%s: request irq failed\n", __func__);
+               goto error_disable_reg;
+       }
+
+       ret = iio_device_register(indio_dev);
+       if (ret) {
+               dev_err(&client->dev, "%s: regist device failed\n", __func__);
+               goto error_free_irq;
+       }
+
+       return 0;
+
+error_free_irq:
+       free_irq(client->irq, indio_dev);
+error_disable_reg:
+       regulator_disable(cm36651->vled_reg);
+       return ret;
+}
+
+static int cm36651_remove(struct i2c_client *client)
+{
+       struct iio_dev *indio_dev = i2c_get_clientdata(client);
+       struct cm36651_data *cm36651 = iio_priv(indio_dev);
+
+       iio_device_unregister(indio_dev);
+       regulator_disable(cm36651->vled_reg);
+       free_irq(client->irq, indio_dev);
+
+       return 0;
+}
+
+static const struct i2c_device_id cm36651_id[] = {
+       { "cm36651", 0 },
+       { }
+};
+
+MODULE_DEVICE_TABLE(i2c, cm36651_id);
+
+static const struct of_device_id cm36651_of_match[] = {
+       { .compatible = "capella,cm36651" },
+       { }
+};
+
+static struct i2c_driver cm36651_driver = {
+       .driver = {
+               .name   = "cm36651",
+               .of_match_table = of_match_ptr(cm36651_of_match),
+               .owner  = THIS_MODULE,
+       },
+       .probe          = cm36651_probe,
+       .remove         = cm36651_remove,
+       .id_table       = cm36651_id,
+};
+
+module_i2c_driver(cm36651_driver);
+
+MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
+MODULE_DESCRIPTION("CM36651 proximity/ambient light sensor driver");
+MODULE_LICENSE("GPL v2");