diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad7150.c')
| -rw-r--r-- | drivers/staging/iio/adc/ad7150.c | 812 |
1 files changed, 0 insertions, 812 deletions
diff --git a/drivers/staging/iio/adc/ad7150.c b/drivers/staging/iio/adc/ad7150.c deleted file mode 100644 index 04017ef6688a..000000000000 --- a/drivers/staging/iio/adc/ad7150.c +++ /dev/null @@ -1,812 +0,0 @@ -/* - * AD7150 capacitive sensor driver supporting AD7150/1/6 - * - * Copyright 2010 Analog Devices Inc. - * - * Licensed under the GPL-2 or later. - */ - -#include <linux/interrupt.h> -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/i2c.h> - -#include "../iio.h" -#include "../sysfs.h" - -/* - * AD7150 registers definition - */ - -#define AD7150_STATUS 0 -#define AD7150_STATUS_OUT1 (1 << 3) -#define AD7150_STATUS_OUT2 (1 << 5) -#define AD7150_CH1_DATA_HIGH 1 -#define AD7150_CH1_DATA_LOW 2 -#define AD7150_CH2_DATA_HIGH 3 -#define AD7150_CH2_DATA_LOW 4 -#define AD7150_CH1_AVG_HIGH 5 -#define AD7150_CH1_AVG_LOW 6 -#define AD7150_CH2_AVG_HIGH 7 -#define AD7150_CH2_AVG_LOW 8 -#define AD7150_CH1_SENSITIVITY 9 -#define AD7150_CH1_THR_HOLD_H 9 -#define AD7150_CH1_TIMEOUT 10 -#define AD7150_CH1_THR_HOLD_L 10 -#define AD7150_CH1_SETUP 11 -#define AD7150_CH2_SENSITIVITY 12 -#define AD7150_CH2_THR_HOLD_H 12 -#define AD7150_CH2_TIMEOUT 13 -#define AD7150_CH2_THR_HOLD_L 13 -#define AD7150_CH2_SETUP 14 -#define AD7150_CFG 15 -#define AD7150_CFG_FIX (1 << 7) -#define AD7150_PD_TIMER 16 -#define AD7150_CH1_CAPDAC 17 -#define AD7150_CH2_CAPDAC 18 -#define AD7150_SN3 19 -#define AD7150_SN2 20 -#define AD7150_SN1 21 -#define AD7150_SN0 22 -#define AD7150_ID 23 - -#define AD7150_MAX_CONV_MODE 4 - -/* - * struct ad7150_chip_info - chip specifc information - */ - -struct ad7150_chip_info { - struct i2c_client *client; - bool inter; - u16 ch1_threshold; /* Ch1 Threshold (in fixed threshold mode) */ - u8 ch1_sensitivity; /* Ch1 Sensitivity (in adaptive threshold mode) */ - u8 ch1_timeout; /* Ch1 Timeout (in adaptive threshold mode) */ - u8 ch1_setup; - u16 ch2_threshold; /* Ch2 Threshold (in fixed threshold mode) */ - u8 ch2_sensitivity; /* Ch1 Sensitivity (in adaptive threshold mode) */ - u8 ch2_timeout; /* Ch1 Timeout (in adaptive threshold mode) */ - u8 ch2_setup; - u8 powerdown_timer; - char threshold_mode[10]; /* adaptive/fixed threshold mode */ - int old_state; - char *conversion_mode; -}; - -struct ad7150_conversion_mode { - char *name; - u8 reg_cfg; -}; - -static struct ad7150_conversion_mode -ad7150_conv_mode_table[AD7150_MAX_CONV_MODE] = { - { "idle", 0 }, - { "continuous-conversion", 1 }, - { "single-conversion", 2 }, - { "power-down", 3 }, -}; - -/* - * ad7150 register access by I2C - */ - -static int ad7150_i2c_read(struct ad7150_chip_info *chip, u8 reg, u8 *data, int len) -{ - struct i2c_client *client = chip->client; - int ret = 0; - - ret = i2c_master_send(client, ®, 1); - if (ret < 0) { - dev_err(&client->dev, "I2C write error\n"); - return ret; - } - - ret = i2c_master_recv(client, data, len); - if (ret < 0) { - dev_err(&client->dev, "I2C read error\n"); - return ret; - } - - return ret; -} - -static int ad7150_i2c_write(struct ad7150_chip_info *chip, u8 reg, u8 data) -{ - struct i2c_client *client = chip->client; - int ret = 0; - - u8 tx[2] = { - reg, - data, - }; - - ret = i2c_master_send(client, tx, 2); - if (ret < 0) - dev_err(&client->dev, "I2C write error\n"); - - return ret; -} - -/* - * sysfs nodes - */ - -#define IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(_show) \ - IIO_DEVICE_ATTR(available_conversion_modes, S_IRUGO, _show, NULL, 0) -#define IIO_DEV_ATTR_CONVERSION_MODE(_mode, _show, _store) \ - IIO_DEVICE_ATTR(conversion_mode, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_AVAIL_THRESHOLD_MODES(_show) \ - IIO_DEVICE_ATTR(available_threshold_modes, S_IRUGO, _show, NULL, 0) -#define IIO_DEV_ATTR_THRESHOLD_MODE(_mode, _show, _store) \ - IIO_DEVICE_ATTR(threshold_mode, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH1_THRESHOLD(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch1_threshold, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH2_THRESHOLD(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch2_threshold, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH1_SENSITIVITY(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch1_sensitivity, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH2_SENSITIVITY(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch2_sensitivity, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH1_TIMEOUT(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch1_timeout, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH2_TIMEOUT(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch2_timeout, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH1_VALUE(_show) \ - IIO_DEVICE_ATTR(ch1_value, S_IRUGO, _show, NULL, 0) -#define IIO_DEV_ATTR_CH2_VALUE(_show) \ - IIO_DEVICE_ATTR(ch2_value, S_IRUGO, _show, NULL, 0) -#define IIO_DEV_ATTR_CH1_SETUP(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch1_setup, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_CH2_SETUP(_mode, _show, _store) \ - IIO_DEVICE_ATTR(ch2_setup, _mode, _show, _store, 0) -#define IIO_DEV_ATTR_POWERDOWN_TIMER(_mode, _show, _store) \ - IIO_DEVICE_ATTR(powerdown_timer, _mode, _show, _store, 0) - -static ssize_t ad7150_show_conversion_modes(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - int i; - int len = 0; - - for (i = 0; i < AD7150_MAX_CONV_MODE; i++) - len += sprintf(buf + len, "%s\n", ad7150_conv_mode_table[i].name); - - return len; -} - -static IIO_DEV_ATTR_AVAIL_CONVERSION_MODES(ad7150_show_conversion_modes); - -static ssize_t ad7150_show_conversion_mode(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%s\n", chip->conversion_mode); -} - -static ssize_t ad7150_store_conversion_mode(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - u8 cfg; - int i; - - ad7150_i2c_read(chip, AD7150_CFG, &cfg, 1); - - for (i = 0; i < AD7150_MAX_CONV_MODE; i++) { - if (strncmp(buf, ad7150_conv_mode_table[i].name, - strlen(ad7150_conv_mode_table[i].name) - 1) == 0) { - chip->conversion_mode = ad7150_conv_mode_table[i].name; - cfg |= 0x18 | ad7150_conv_mode_table[i].reg_cfg; - ad7150_i2c_write(chip, AD7150_CFG, cfg); - return len; - } - } - - dev_err(dev, "not supported conversion mode\n"); - - return -EINVAL; -} - -static IIO_DEV_ATTR_CONVERSION_MODE(S_IRUGO | S_IWUSR, - ad7150_show_conversion_mode, - ad7150_store_conversion_mode); - -static ssize_t ad7150_show_threshold_modes(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - return sprintf(buf, "adaptive\nfixed\n"); -} - -static IIO_DEV_ATTR_AVAIL_THRESHOLD_MODES(ad7150_show_threshold_modes); - -static ssize_t ad7150_show_ch1_value(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - u8 data[2]; - - ad7150_i2c_read(chip, AD7150_CH1_DATA_HIGH, data, 2); - return sprintf(buf, "%d\n", ((int) data[0] << 8) | data[1]); -} - -static IIO_DEV_ATTR_CH1_VALUE(ad7150_show_ch1_value); - -static ssize_t ad7150_show_ch2_value(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - u8 data[2]; - - ad7150_i2c_read(chip, AD7150_CH2_DATA_HIGH, data, 2); - return sprintf(buf, "%d\n", ((int) data[0] << 8) | data[1]); -} - -static IIO_DEV_ATTR_CH2_VALUE(ad7150_show_ch2_value); - -static ssize_t ad7150_show_threshold_mode(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%s\n", chip->threshold_mode); -} - -static ssize_t ad7150_store_threshold_mode(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - u8 cfg; - - ad7150_i2c_read(chip, AD7150_CFG, &cfg, 1); - - if (strncmp(buf, "fixed", 5) == 0) { - strcpy(chip->threshold_mode, "fixed"); - cfg |= AD7150_CFG_FIX; - ad7150_i2c_write(chip, AD7150_CFG, cfg); - - return len; - } else if (strncmp(buf, "adaptive", 8) == 0) { - strcpy(chip->threshold_mode, "adaptive"); - cfg &= ~AD7150_CFG_FIX; - ad7150_i2c_write(chip, AD7150_CFG, cfg); - - return len; - } - - dev_err(dev, "not supported threshold mode\n"); - return -EINVAL; -} - -static IIO_DEV_ATTR_THRESHOLD_MODE(S_IRUGO | S_IWUSR, - ad7150_show_threshold_mode, - ad7150_store_threshold_mode); - -static ssize_t ad7150_show_ch1_threshold(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch1_threshold); -} - -static ssize_t ad7150_store_ch1_threshold(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x10000)) { - ad7150_i2c_write(chip, AD7150_CH1_THR_HOLD_H, data >> 8); - ad7150_i2c_write(chip, AD7150_CH1_THR_HOLD_L, data); - chip->ch1_threshold = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH1_THRESHOLD(S_IRUGO | S_IWUSR, - ad7150_show_ch1_threshold, - ad7150_store_ch1_threshold); - -static ssize_t ad7150_show_ch2_threshold(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch2_threshold); -} - -static ssize_t ad7150_store_ch2_threshold(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x10000)) { - ad7150_i2c_write(chip, AD7150_CH2_THR_HOLD_H, data >> 8); - ad7150_i2c_write(chip, AD7150_CH2_THR_HOLD_L, data); - chip->ch2_threshold = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH2_THRESHOLD(S_IRUGO | S_IWUSR, - ad7150_show_ch2_threshold, - ad7150_store_ch2_threshold); - -static ssize_t ad7150_show_ch1_sensitivity(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch1_sensitivity); -} - -static ssize_t ad7150_store_ch1_sensitivity(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7150_i2c_write(chip, AD7150_CH1_SENSITIVITY, data); - chip->ch1_sensitivity = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH1_SENSITIVITY(S_IRUGO | S_IWUSR, - ad7150_show_ch1_sensitivity, - ad7150_store_ch1_sensitivity); - -static ssize_t ad7150_show_ch2_sensitivity(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch2_sensitivity); -} - -static ssize_t ad7150_store_ch2_sensitivity(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7150_i2c_write(chip, AD7150_CH2_SENSITIVITY, data); - chip->ch2_sensitivity = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH2_SENSITIVITY(S_IRUGO | S_IWUSR, - ad7150_show_ch2_sensitivity, - ad7150_store_ch2_sensitivity); - -static ssize_t ad7150_show_ch1_timeout(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch1_timeout); -} - -static ssize_t ad7150_store_ch1_timeout(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7150_i2c_write(chip, AD7150_CH1_TIMEOUT, data); - chip->ch1_timeout = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH1_TIMEOUT(S_IRUGO | S_IWUSR, - ad7150_show_ch1_timeout, - ad7150_store_ch1_timeout); - -static ssize_t ad7150_show_ch2_timeout(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "%d\n", chip->ch2_timeout); -} - -static ssize_t ad7150_store_ch2_timeout(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7150_i2c_write(chip, AD7150_CH2_TIMEOUT, data); - chip->ch2_timeout = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH2_TIMEOUT(S_IRUGO | S_IWUSR, - ad7150_show_ch2_timeout, - ad7150_store_ch2_timeout); - -static ssize_t ad7150_show_ch1_setup(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "0x%02x\n", chip->ch1_setup); -} - -static ssize_t ad7150_store_ch1_setup(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7150_i2c_write(chip, AD7150_CH1_SETUP, data); - chip->ch1_setup = data; - return len; - } - - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH1_SETUP(S_IRUGO | S_IWUSR, - ad7150_show_ch1_setup, - ad7150_store_ch1_setup); - -static ssize_t ad7150_show_ch2_setup(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "0x%02x\n", chip->ch2_setup); -} - -static ssize_t ad7150_store_ch2_setup(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x100)) { - ad7150_i2c_write(chip, AD7150_CH2_SETUP, data); - chip->ch2_setup = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_CH2_SETUP(S_IRUGO | S_IWUSR, - ad7150_show_ch2_setup, - ad7150_store_ch2_setup); - -static ssize_t ad7150_show_powerdown_timer(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - - return sprintf(buf, "0x%02x\n", chip->powerdown_timer); -} - -static ssize_t ad7150_store_powerdown_timer(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *dev_info = dev_get_drvdata(dev); - struct ad7150_chip_info *chip = iio_priv(dev_info); - unsigned long data; - int ret; - - ret = strict_strtoul(buf, 10, &data); - - if ((!ret) && (data < 0x40)) { - chip->powerdown_timer = data; - return len; - } - - return -EINVAL; -} - -static IIO_DEV_ATTR_POWERDOWN_TIMER(S_IRUGO | S_IWUSR, - ad7150_show_powerdown_timer, - ad7150_store_powerdown_timer); - -static struct attribute *ad7150_attributes[] = { - &iio_dev_attr_available_threshold_modes.dev_attr.attr, - &iio_dev_attr_threshold_mode.dev_attr.attr, - &iio_dev_attr_ch1_threshold.dev_attr.attr, - &iio_dev_attr_ch2_threshold.dev_attr.attr, - &iio_dev_attr_ch1_timeout.dev_attr.attr, - &iio_dev_attr_ch2_timeout.dev_attr.attr, - &iio_dev_attr_ch1_setup.dev_attr.attr, - &iio_dev_attr_ch2_setup.dev_attr.attr, - &iio_dev_attr_ch1_sensitivity.dev_attr.attr, - &iio_dev_attr_ch2_sensitivity.dev_attr.attr, - &iio_dev_attr_powerdown_timer.dev_attr.attr, - &iio_dev_attr_ch1_value.dev_attr.attr, - &iio_dev_attr_ch2_value.dev_attr.attr, - NULL, -}; - -static const struct attribute_group ad7150_attribute_group = { - .attrs = ad7150_attributes, -}; - -/* - * threshold events - */ - -static irqreturn_t ad7150_event_handler(int irq, void *private) -{ - struct iio_dev *indio_dev = private; - struct ad7150_chip_info *chip = iio_priv(indio_dev); - u8 int_status; - s64 timestamp = iio_get_time_ns(); - - ad7150_i2c_read(chip, AD7150_STATUS, &int_status, 1); - - if ((int_status & AD7150_STATUS_OUT1) && !(chip->old_state & AD7150_STATUS_OUT1)) - iio_push_event(indio_dev, 0, - IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN, - 0, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_RISING), - timestamp); - else if ((!(int_status & AD7150_STATUS_OUT1)) && (chip->old_state & AD7150_STATUS_OUT1)) - iio_push_event(indio_dev, 0, - IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN, - 0, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_FALLING), - timestamp); - - if ((int_status & AD7150_STATUS_OUT2) && !(chip->old_state & AD7150_STATUS_OUT2)) - iio_push_event(indio_dev, 0, - IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN, - 1, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_RISING), - timestamp); - else if ((!(int_status & AD7150_STATUS_OUT2)) && (chip->old_state & AD7150_STATUS_OUT2)) - iio_push_event(indio_dev, 0, - IIO_UNMOD_EVENT_CODE(IIO_EV_CLASS_IN, - 1, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_FALLING), - timestamp); - return IRQ_HANDLED; -} - -static IIO_CONST_ATTR(ch1_high_en, "1"); -static IIO_CONST_ATTR(ch2_high_en, "1"); -static IIO_CONST_ATTR(ch1_low_en, "1"); -static IIO_CONST_ATTR(ch2_low_en, "1"); - -static struct attribute *ad7150_event_attributes[] = { - &iio_const_attr_ch1_high_en.dev_attr.attr, - &iio_const_attr_ch2_high_en.dev_attr.attr, - &iio_const_attr_ch1_low_en.dev_attr.attr, - &iio_const_attr_ch2_low_en.dev_attr.attr, - NULL, -}; - -static struct attribute_group ad7150_event_attribute_group = { - .attrs = ad7150_event_attributes, -}; - -static const struct iio_info ad7150_info = { - .attrs = &ad7150_attribute_group, - .num_interrupt_lines = 1, - .event_attrs = &ad7150_event_attribute_group, - .driver_module = THIS_MODULE, -}; -/* - * device probe and remove - */ - -static int __devinit ad7150_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int ret = 0, regdone = 0; - struct ad7150_chip_info *chip; - struct iio_dev *indio_dev; - - indio_dev = iio_allocate_device(sizeof(*chip)); - if (indio_dev == NULL) { - ret = -ENOMEM; - goto error_ret; - } - chip = iio_priv(indio_dev); - /* this is only used for device removal purposes */ - i2c_set_clientdata(client, indio_dev); - - chip->client = client; - - /* Establish that the iio_dev is a child of the i2c device */ - indio_dev->name = id->name; - indio_dev->dev.parent = &client->dev; - - indio_dev->info = &ad7150_info; - - indio_dev->modes = INDIO_DIRECT_MODE; - - ret = iio_device_register(indio_dev); - if (ret) - goto error_free_dev; - regdone = 1; - - if (client->irq) { - ret = request_threaded_irq(client->irq, - NULL, - &ad7150_event_handler, - IRQF_TRIGGER_RISING | - IRQF_TRIGGER_FALLING, - "ad7150", - indio_dev); - if (ret) - goto error_free_dev; - } - - dev_err(&client->dev, "%s capacitive sensor registered, irq: %d\n", id->name, client->irq); - - return 0; - -error_free_dev: - if (regdone) - iio_device_unregister(indio_dev); - else - iio_free_device(indio_dev); -error_ret: - return ret; -} - -static int __devexit ad7150_remove(struct i2c_client *client) -{ - struct iio_dev *indio_dev = i2c_get_clientdata(client); - - if (client->irq) - free_irq(client->irq, indio_dev); - iio_device_unregister(indio_dev); - - return 0; -} - -static const struct i2c_device_id ad7150_id[] = { - { "ad7150", 0 }, - { "ad7151", 0 }, - { "ad7156", 0 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, ad7150_id); - -static struct i2c_driver ad7150_driver = { - .driver = { - .name = "ad7150", - }, - .probe = ad7150_probe, - .remove = __devexit_p(ad7150_remove), - .id_table = ad7150_id, -}; - -static __init int ad7150_init(void) -{ - return i2c_add_driver(&ad7150_driver); -} - -static __exit void ad7150_exit(void) -{ - i2c_del_driver(&ad7150_driver); -} - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices ad7150/1/6 capacitive sensor driver"); -MODULE_LICENSE("GPL v2"); - -module_init(ad7150_init); -module_exit(ad7150_exit); 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