| /* |
| * 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; |
| struct iio_dev *indio_dev; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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 = dev_info->dev_data; |
| |
| 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 = dev_info->dev_data; |
| 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_dev_get_devdata(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 = kzalloc(sizeof(*chip), GFP_KERNEL); |
| if (chip == NULL) { |
| ret = -ENOMEM; |
| goto error_ret; |
| } |
| |
| /* this is only used for device removal purposes */ |
| i2c_set_clientdata(client, chip); |
| |
| chip->client = client; |
| |
| chip->indio_dev = iio_allocate_device(0); |
| if (chip->indio_dev == NULL) { |
| ret = -ENOMEM; |
| goto error_free_chip; |
| } |
| |
| /* Establish that the iio_dev is a child of the i2c device */ |
| chip->indio_dev->name = id->name; |
| chip->indio_dev->dev.parent = &client->dev; |
| |
| chip->indio_dev->info = &ad7150_info; |
| chip->indio_dev->dev_data = (void *)(chip); |
| |
| chip->indio_dev->modes = INDIO_DIRECT_MODE; |
| |
| ret = iio_device_register(chip->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", |
| chip->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(chip->indio_dev); |
| else |
| iio_free_device(chip->indio_dev); |
| error_free_chip: |
| kfree(chip); |
| error_ret: |
| return ret; |
| } |
| |
| static int __devexit ad7150_remove(struct i2c_client *client) |
| { |
| struct ad7150_chip_info *chip = i2c_get_clientdata(client); |
| struct iio_dev *indio_dev = chip->indio_dev; |
| |
| if (client->irq) |
| free_irq(client->irq, indio_dev); |
| iio_device_unregister(indio_dev); |
| kfree(chip); |
| |
| 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); |