Dear Peter,
On 09/09/2013 09:14 PM, Beomho Seo wrote:
> Hello, Mr. Meerwald
>
> Thank you for your advice.
>
> 2013년 09월 09일 16:57, Peter Meerwald 쓴 글:
>>
>>> This patch add a new driver for Capella CM36651 proximity and RGB light
>>> sensor.
>>> The driver exposes two channels: light and proximity. It also support
>>> detection proximity event.
>>
>> comments inline;
>> I do not have the chip, but I don't think that the code will work and
>> intended
>>
Why do you think so? I'm not sure whether this driver is working well or not.
But i known that Beomho has tested this driver on exynos4 board with this device.
If you will mention the more detailed, he will fix them.
Best Regards,
Jaehoon Chung
>
> After I have made this driver, I have checked device working on test board.
>
>>> This driver supports:
>>> - events - rising and falling proximity events.
>>> - reading channels through read_raw callback.
>>>
>>> Signed-off-by: Beomho Seo <beomho.seo@xxxxxxxxxxx>
>>> ---
>>> drivers/iio/light/Kconfig | 11 +
>>> drivers/iio/light/cm36651.c | 607
>>> +++++++++++++++++++++++++++++++++++++++++++
>>> 2 files changed, 618 insertions(+)
>>> create mode 100644 drivers/iio/light/cm36651.c
>>>
>>> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
>>> index bf9fa0d..66fb76f 100644
>>> --- a/drivers/iio/light/Kconfig
>>> +++ b/drivers/iio/light/Kconfig
>>> @@ -75,4 +75,15 @@ config VCNL4000
>>> To compile this driver as a module, choose M here: the
>>> module will be called vcnl4000.
>>>
>>> +config CM36651
>>
>> sensors to be listed in alphabetical order
>>
>
> I have fixed it.
>
>>> + 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.
>>> +
>>> endmenu
>>> diff --git a/drivers/iio/light/cm36651.c b/drivers/iio/light/cm36651.c
>>> new file mode 100644
>>> index 0000000..b3e1f0d
>>> --- /dev/null
>>> +++ b/drivers/iio/light/cm36651.c
>>> @@ -0,0 +1,607 @@
>>> +/*
>>> + * Copyright (C) 2013 Samsung Electronics Co., Ltd.
>>> + * Author: Beomho Seo <beomho.seo@xxxxxxxxxxx>
>>> + *
>>> + * 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/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 */
>> consistently start comments with uppercase letter
>>
>
> I use uppercase letter starting comments.
>
>>> +#define CM36651_I2C_ADDR_PS 0x19
>>
>> interesting, the chip seems to have two i2c addresses, the other one is
>> 0x18
>>
>> is this really one chip? an option would be to do two drivers: one for
>> ALS, one for proximity
>>
>
> CM36651 is one chip. I have checked it. CM36651 apply slave address 0x18 for CS and 0x19 for PS of 7 bit addressing protocol for I2C. CM36651 contains are 8-bit command register following each of slave address. All operations can ve contrroled by the command register.
>
>>> +
>>> +/* Ambient light sensor */
>>> +#define CS_CONF1 0x00
>>> +#define CS_CONF2 0x01
>>> +#define CS_CONF3 0x06
>>> +
>>> +#define RED 0x00
>>> +#define GREEN 0x01
>>> +#define BLUE 0x02
>>> +#define WHITE 0x03
>>> +
>>> +/* Proximity sensor */
>>> +#define PS_CONF1 0x00
>>> +#define PS_THD 0x01
>>> +#define PS_CANC 0x02
>>> +#define PS_CONF2 0x03
>>> +
>>> +#define ALS_REG_NUM 3
>>> +#define PS_REG_NUM 4
>>> +#define ALS_CHANNEL_NUM 4
>>> +#define INITIAL_THD 0x09
>>> +#define SCAN_MODE_LIGHT 0
>>> +#define SCAN_MODE_PROX 1
>>> +
>>> +enum {
>>> + CM36651_LIGHT_EN,
>>> + CM36651_PROXIMITY_EN,
>>> + CM36651_PROXIMITY_EV_EN,
>>> +};
>>> +
>>> +enum cm36651_cmd {
>>> + CM36651_CMD_READ_RAW_LIGHT,
>>> + CM36651_CMD_READ_RAW_PROXIMITY,
>>> + CM36651_CMD_PROX_EV_EN,
>>> + CM36651_CMD_PROX_EV_DIS,
>>> +};
>>> +
>>> +enum {
>>> + CM36651_CLOSE_PROXIMITY,
>>> + CM36651_FAR_PROXIMITY,
>>> +};
>>> +
>>> +/* register settings */
>>> +static const u8 als_reg_setting[ALS_REG_NUM][2] = {
>>> + { 0x00, 0x04 }, /* CS_CONF1 */
>>
>> use your #defines instead of a comment, e.g. { CS_CONF1, 0x04 }
>>
>> what are the magic constants 0x04, 0x08?
>>
>
> I'll use #defines instedad of a comment next version.
> And magic constants(e.g. 0x04, 0x08) will be made to #defines also.
>
>>> + { 0x01, 0x08 }, /* CS_CONF2 */
>>> + { 0x06, 0x00 } /* CS_CONF3 */
>>> +};
>>> +
>>> +static const u8 ps_reg_setting[PS_REG_NUM][2] = {
>>> + { 0x00, 0x3C }, /* PS_CONF1 */
>>> + { 0x01, 0x09 }, /* PS_THD */
>>> + { 0x02, 0x00 }, /* PS_CANC */
>>> + { 0x03, 0x13 }, /* PS_CONF2 */
>>> +};
>>> +
>>> +struct cm36651_data {
>>> + const struct cm36651_platform_data *pdata;
>>> + struct i2c_client *client;
>>> + struct i2c_client *ps_client;
>>> + struct mutex lock;
>>> + struct regulator *vled_reg;
>>> + unsigned long flags;
>>> + u8 thres;
>>> + u16 color[4];
>>> +};
>>> +
>>> +int cm36651_i2c_read_byte(struct i2c_client *client, u8 *val)
>>> +{
>>> + int ret = 0;
>>> + struct i2c_msg msg[1];
>>> +
>>> + if (!client->adapter)
>>> + return -ENODEV;
>>> +
>>> + /* send slave address & command */
>>> + msg->addr = client->addr;
>>> + msg->flags = I2C_M_RD;
>>> + msg->len = 1;
>>> + msg->buf = val;
>>> +
>>> + ret = i2c_transfer(client->adapter, msg, 1);
>>> + if (ret != 1) {
>>> + dev_err(&client->dev, "i2c transfer error ret: %d\n", ret);
>>> + ret = -EIO;
>>> + }
>>> +
>>> + return ret;
>>> +}
>>
>> use i2c_smbus_read_byte_data() instead?
>>
>
> I'll try use i2c_smbus_* API at next patch.
>
>>> +
>>> +int cm36651_i2c_read_word(struct i2c_client *client, u8 command, u16 *val)
>>> +{
>>> + int ret = 0;
>>> + struct i2c_msg msg[2];
>>> + unsigned char data[2] = { 0, };
>>> +
>>> + if (!client->adapter)
>>> + return -ENODEV;
>>> +
>>> + /* send slave address & command */
>>> + msg[0].addr = client->addr;
>>> + msg[0].flags = 0;
>>> + msg[0].len = 1;
>>> + msg[0].buf = &command;
>>> +
>>> + /* read word data */
>>> + msg[1].addr = client->addr;
>>> + msg[1].flags = I2C_M_RD;
>>> + msg[1].len = 2;
>>> + msg[1].buf = data;
>>> +
>>> + ret = i2c_transfer(client->adapter, msg, 2);
>>> + if (ret != 2) {
>>> + dev_err(&client->dev, "i2c transfer error ret: %d\n", ret);
>>> + ret = -EIO;
>>> + }
>>> + *val = le16_to_cpup((__le16 *)data);
>>> +
>>> + return ret;
>>> +}
>>
>> use i2c_smbus_read_word_data() instead?
>>
>>> +
>>> +int cm36651_i2c_write_byte(struct i2c_client *client, u8 command, u8 val)
>>> +{
>>> + int ret;
>>> + struct i2c_msg msg[1];
>>> + unsigned char data[2] = { command, val };
>>> +
>>> + if (!client->adapter)
>>> + return -ENODEV;
>>> +
>>> + /* send slave address & command */
>>> + msg->addr = client->addr;
>>> + msg->flags = 0;
>>> + msg->len = 2;
>>> + msg->buf = data;
>>> +
>>> + ret = i2c_transfer(client->adapter, msg, 1);
>>> + if (ret != 1) {
>>> + dev_err(&client->dev, "i2c transfer error ret: %d\n", ret);
>>> + ret = -EIO;
>>> + }
>>> +
>>> + return ret;
>>> +}
>>
>> use i2c_smbus_write_byte_data() instead?
>>
>>> +
>>> +static int cm36651_setup_reg(struct cm36651_data *cm36651)
>>> +{
>>> + struct i2c_client *client = cm36651->client;
>>> + int ret = 0, i = 0;
>>
>> no need to initialize ret, tmp and i
>>
>
> I'll fix on your comment.
>
>>> + u8 tmp = 0;
>>> +
>>> + /* ALS initialization */
>>> + for (i = 0; i < ALS_REG_NUM; i++) {
>>> + ret = cm36651_i2c_write_byte(client,
>>> + als_reg_setting[i][0], als_reg_setting[i][1]);
>>> + if (ret < 0)
>>> + goto err_setup_reg;
>>> + }
>>> +
>>> + /* PS initialization */
>>> + for (i = 0; i < PS_REG_NUM; i++) {
>>> + ret = cm36651_i2c_write_byte(cm36651->ps_client,
>>> + ps_reg_setting[i][0], ps_reg_setting[i][1]);
>>> + if (ret < 0)
>>> + goto err_setup_reg;
>>> + }
>>> +
>>> + ret = cm36651_i2c_read_byte(cm36651->ps_client, &tmp);
>>> + if (ret < 0)
>>> + goto err_setup_reg;
>>> +
>>> + /* printing the initial proximity value with no contact */
>>> + dev_dbg(&client->dev, "initial proximity value: %d\n", tmp);
>>> +
>>> + /* device turn off */
>>> + ret = cm36651_i2c_write_byte(client, CS_CONF1, 0x01);
>>
>> use a #define for 0x01 to describe function
>>
>
> OK. I'll use a #define for 0x01 to describe function.
>
>>> + if (ret < 0)
>>> + goto err_setup_reg;
>>> +
>>> + ret = cm36651_i2c_write_byte(cm36651->ps_client, PS_CONF1, 0x01);
>>> + if (ret < 0)
>>> + goto err_setup_reg;
>>> +
>>> + return 0;
>>> +
>>> +err_setup_reg:
>>> + dev_err(&client->dev, "cm36651_setup_reg() failed: %d\n", ret);
>>> + return ret;
>>> +}
>>> +
>>> +static int cm36651_read_output(struct cm36651_data *cm36651,
>>> + int scan_index, int *val)
>>> +{
>>
>> val is not used?
>>
>
> I'll check it, and then fix.
>
>>> + struct i2c_client *client = cm36651->client;
>>> + int i;
>>> + int ret = -EINVAL;
>>> + u8 prox_val;
>>> +
>>> + switch (scan_index) {
>>> + case SCAN_MODE_LIGHT:
>>> + for (i = 0; i < ALS_CHANNEL_NUM; i++) {
>>> + ret = cm36651_i2c_read_word(client, i,
>>> + &cm36651->color[i]);
>>
>> I think this is wrong: i is 0,1,2,3,4 but CS_CONF1, CS_CONF2 is 0, 1 as
>> well -- so the config registers are read here?
>>
>> the channel data (red,green,blue,clear) is at addresses 0x02 .. 0x05
>> (according to
>> https://github.com/mozilla-b2g/kernel-android-galaxy-s2-ics/blob/master/drivers/sensor/cm36651.c)
>>
>
> i is 0, 1, 2, 3. Also in above link, you can refer to loghtsensor_lux_show and cm36641_work_func_light function, cm36651_i2c_read_word function need to cm36651_data struct,
> address, command, and val data. Where, color Macros(RED, GREEN, BLUE, WHITE) are command data. Not address. Address is fixed on CM36651_ALS Macro.
> And then, ALS_WH_M, ... ALS_WL_L(0x02...0x05) registers like below:
>
> ALS_WH_M 0x02 ALS High Threshold Window setting [15:8]
> ALS_WH_L 0x03 ALS High Threshold Whndow setting [7:0]
> ...
> ALS_WL_M 0x05 ALS Low Threshold Window setting [7:0]
>
>>> + if (ret < 0)
>>> + goto read_err;
>>> + }
>>> +
>>> + dev_dbg(&client->dev, "red: %d, green: %d, blue: %d, white: %d\n",
>>> + cm36651->color[0] + 1, cm36651->color[1] + 1,
>>> + cm36651->color[2] + 1, cm36651->color[3] + 1);
>>> +
>>> + ret = cm36651_i2c_write_byte(client, CS_CONF1, 0x01);
>>
>> what does this do?
>>
>
> Above code is light sensor disable setting.
>
>>> + if (ret < 0)
>>> + goto write_err;
>>> +
>>> + break;
>>> + case SCAN_MODE_PROX:
>>> + ret = cm36651_i2c_read_byte(cm36651->ps_client, &prox_val);
>>> + if (ret < 0)
>>> + goto read_err;
>>> +
>>> + dev_dbg(&client->dev, "proximity value: %d\n", prox_val);
>>
>> prox_val is not returned?
>>
>
> I'll check and fix at next version patch.
>
>>> +
>>> + ret = cm36651_i2c_write_byte(cm36651->ps_client,
>>> + PS_CONF1, 0x01);
>>> + if (ret < 0)
>>> + goto write_err;
>>> +
>>> + break;
>>> + }
>>> +
>>> + return ret;
>>> +
>>> +read_err:
>>> + dev_err(&client->dev, "register read failed\n");
>>> + return ret;
>>> +
>>> +write_err:
>>> + dev_err(&client->dev, "register write failed\n");
>>> + 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, val, ret;
>>> + u64 ev_code;
>>> + u8 tmp;
>>> +
>>
>> tmp must be initialized with the command?
>>
>
> I'll fix it on your advice.
>
>>> + ret = cm36651_i2c_read_byte(cm36651->ps_client, &tmp);
>>> + if (ret < 0) {
>>> + dev_err(&client->dev,
>>> + "%s: data read failed: %d\n", __func__, ret);
>>> + return IRQ_NONE;
>>
>> should always return IRQ_HANDLED
>>
>
> I'll fix it on your advice.
>
>>> + }
>>> +
>>> + if (tmp < ps_reg_setting[1][1]) {
>>> + ev_dir = IIO_EV_DIR_RISING;
>>> + val = CM36651_FAR_PROXIMITY;
>>> + } else {
>>> + ev_dir = IIO_EV_DIR_FALLING;
>>> + val = CM36651_CLOSE_PROXIMITY;
>>> + }
>>> +
>>> + 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,
>>> + enum cm36651_cmd cmd)
>>> +{
>>> + struct i2c_client *client = cm36651->client;
>>> + int ret = 0;
>>> + int i;
>>> +
>>> + switch (cmd) {
>>> + case CM36651_CMD_READ_RAW_LIGHT:
>>> + ret = cm36651_i2c_write_byte(client, CS_CONF1, 0x04);
>>> + break;
>>> + case CM36651_CMD_READ_RAW_PROXIMITY:
>>> + ret = cm36651_i2c_write_byte(cm36651->ps_client,
>>> + PS_CONF1, 0x3C);
>>> + 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);
>>> + for (i = 0; i < 4; i++) {
>>> + ret = cm36651_i2c_write_byte(cm36651->ps_client,
>>> + ps_reg_setting[i][0], ps_reg_setting[i][1]);
>>> + if (ret < 0)
>>> + goto write_err;
>>> + }
>>> + enable_irq(client->irq);
>>> + 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);
>>> + disable_irq(client->irq);
>>> + ret = cm36651_i2c_write_byte(cm36651->ps_client,
>>> + PS_CONF1, 0x01);
>>> + break;
>>> + }
>>> +
>>> + if (ret < 0)
>>> + dev_err(&client->dev, "write register failed\n");
>>> +
>>> + return ret;
>>> +
>>> +write_err:
>>> + dev_err(&client->dev, "proximity event toe enable is failed\n");
>>
>> typo: toe; rephase
>>
>
> I have fixed on correct typo.
>
>>> + 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;
>>> + enum cm36651_cmd cmd = 0;
>>> + int ret;
>>> +
>>> + if (chan->scan_index == SCAN_MODE_LIGHT)
>>> + cmd = CM36651_CMD_READ_RAW_LIGHT;
>>> + else /* SCAN_MODE_PROX */
>>> + cmd = CM36651_CMD_READ_RAW_PROXIMITY;
>>> +
>>> + ret = cm36651_set_operation_mode(cm36651, cmd);
>>> + if (ret < 0) {
>>> + dev_err(&client->dev, "cm36651 set operation mode failed\n");
>>> + return ret;
>>> + }
>>> + /* raw data integration time */
>>> + msleep(50);
>>> + ret = cm36651_read_output(cm36651, chan->scan_index, val);
>>
>> _read_output() does not return data in val!
>>
>
> OK. I'll fix it.
>
>>> + if (ret < 0) {
>>> + dev_err(&client->dev, "cm36651 read output failed\n");
>>> + return ret;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +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 = -EINVAL;
>>> +
>>> + mutex_lock(&cm36651->lock);
>>> +
>>> + switch (mask) {
>>> + case IIO_CHAN_INFO_RAW:
>>> + ret = cm36651_read_channel(cm36651, chan, val);
>>> + break;
>>> + }
>>> + mutex_unlock(&cm36651->lock);
>>> +
>>> + return ret;
>>> +}
>>> +
>>> +static int cm36651_read_thresh(struct iio_dev *indio_dev,
>>> + u64 event_code, int *val)
>>> +{
>>> + struct cm36651_data *cm36651 = iio_priv(indio_dev);
>>> + int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
>>> + int event_type = IIO_EVENT_CODE_EXTRACT_TYPE(event_code);
>>> +
>>> + if (event_type != IIO_EV_TYPE_THRESH || chan_type != IIO_PROXIMITY)
>>> + return -EINVAL;
>>> +
>>> + if (!cm36651->thres)
>>> + *val = ps_reg_setting[1][1]; /* initial threshold value */
>>> + else
>>> + *val = cm36651->thres;
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int cm36651_write_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;
>>> +
>>> + cm36651->thres = val;
>>> + ret = cm36651_i2c_write_byte(cm36651->ps_client,
>>> + PS_THD, cm36651->thres);
>>> +
>>> + if (ret < 0) {
>>> + dev_err(&client->dev, "PS register read faied: %d\n", ret);
>>> + return ret;
>>> + }
>>> + dev_dbg(&client->dev, "new threshold is 0x%x\n", cm36651->thres);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static int cm36651_write_event_config(struct iio_dev *indio_dev,
>>> + u64 event_code, int state)
>>> +{
>>> + struct cm36651_data *cm36651 = iio_priv(indio_dev);
>>> + enum cm36651_cmd cmd;
>>> + int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
>>> + int ret = -EINVAL;
>>> +
>>> + mutex_lock(&cm36651->lock);
>>> +
>>> + if (chan_type == IIO_PROXIMITY) {
>>> + 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_event_config(struct iio_dev *indio_dev, u64
>>> event_code)
>>> +{
>>> + struct cm36651_data *cm36651 = iio_priv(indio_dev);
>>> + int chan_type = IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code);
>>> + int event_en = -EINVAL;
>>> +
>>> + mutex_lock(&cm36651->lock);
>>> +
>>> + if (chan_type == IIO_PROXIMITY)
>>> + event_en = test_bit(CM36651_PROXIMITY_EV_EN, &cm36651->flags);
>>> +
>>> + mutex_unlock(&cm36651->lock);
>>> +
>>> + return event_en;
>>> +}
>>> +
>>> +static const struct iio_chan_spec cm36651_channels[] = {
>>> + {
>>> + .type = IIO_LIGHT,
>>> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
>>> + .scan_type = {
>>> + .sign = 'u',
>>> + .realbits = 16,
>>> + .shift = 0,
>>> + .storagebits = 16,
>>> + },
>>> + .scan_index = SCAN_MODE_LIGHT
>>> + },
>>> + {
>>> + .type = IIO_PROXIMITY,
>>> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
>>> + .scan_type = {
>>> + .sign = 'u',
>>> + .realbits = 8,
>>> + .shift = 0,
>>> + .storagebits = 8,
>>> + },
>>> + .scan_index = SCAN_MODE_PROX,
>>> + .event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER)
>>> + },
>>> +};
>>> +
>>> +static const struct iio_info cm36651_info = {
>>> + .driver_module = THIS_MODULE,
>>> + .read_raw = &cm36651_read_raw,
>>> + .read_event_value = &cm36651_read_thresh,
>>> + .write_event_value = &cm36651_write_thresh,
>>> + .read_event_config = &cm36651_read_event_config,
>>> + .write_event_config = &cm36651_write_event_config,
>>> +};
>>> +
>>> +static int cm36651_probe(struct i2c_client *client,
>>> + const struct i2c_device_id *id)
>>> +{
>>> + struct cm36651_data *cm36651;
>>> + struct iio_dev *indio_dev;
>>> + unsigned long irqflag;
>>> + int ret;
>>> +
>>> + dev_dbg(&client->dev, "cm36651 light/proxymity sensor probe\n");
>>> +
>>> + 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 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);
>>> + 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);
>>> +
>>> + irqflag = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
>>
>> rising and falling?
>>
>
> There are distance from sensor device. Rising is far from device. on the contrary to this Falling is close from device.
>
>>> + ret = request_threaded_irq(client->irq, NULL, cm36651_irq_handler,
>>> + irqflag, "cm36651_proximity", indio_dev);
>>> + if (ret) {
>>> + dev_err(&client->dev, "%s: request irq failed\n", __func__);
>>> + return ret;
>>> + }
>>> + disable_irq(client->irq);
>>> +
>>> + ret = iio_device_register(indio_dev);
>>> + if (ret) {
>>> + regulator_disable(cm36651->vled_reg);
>>
>> irq not freed
>>
>
> It will be fixed.
>
>>> + return ret;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +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);
>>> + iio_device_free(indio_dev);
>>
>> iio_device_free() not needed since using devm_iio_device_alloc()
>>
>
> It will be fixed.
>
>>> +
>>> + 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@xxxxxxxxxxx>");
>>> +MODULE_DESCRIPTION("CM36651 proximity/ambient light sensor driver");
>>> +MODULE_LICENSE("GPL v2");
>>>
>>
>
> I will fix and send v2 patch soon.
>
> Best regards,
> Beomho Seo
>
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