--- /dev/null
+/*
+ * AD7150 capacitive sensor driver supporting AD7150/1/6
+ *
+ * Copyright 2010-2011 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 <linux/module.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.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_CH2_DATA_HIGH 3
+#define AD7150_CH1_AVG_HIGH 5
+#define AD7150_CH2_AVG_HIGH 7
+#define AD7150_CH1_SENSITIVITY 9
+#define AD7150_CH1_THR_HOLD_H 9
+#define AD7150_CH1_TIMEOUT 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_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
+
+/**
+ * struct ad7150_chip_info - instance specific chip data
+ * @client: i2c client for this device
+ * @current_event: device always has one type of event enabled.
+ * This element stores the event code of the current one.
+ * @threshold: thresholds for simple capacitance value events
+ * @thresh_sensitivity: threshold for simple capacitance offset
+ * from 'average' value.
+ * @mag_sensitity: threshold for magnitude of capacitance offset from
+ * from 'average' value.
+ * @thresh_timeout: a timeout, in samples from the moment an
+ * adaptive threshold event occurs to when the average
+ * value jumps to current value.
+ * @mag_timeout: a timeout, in sample from the moment an
+ * adaptive magnitude event occurs to when the average
+ * value jumps to the current value.
+ * @old_state: store state from previous event, allowing confirmation
+ * of new condition.
+ * @conversion_mode: the current conversion mode.
+ * @state_lock: ensure consistent state of this structure wrt the
+ * hardware.
+ */
+struct ad7150_chip_info {
+ struct i2c_client *client;
+ u64 current_event;
+ u16 threshold[2][2];
+ u8 thresh_sensitivity[2][2];
+ u8 mag_sensitivity[2][2];
+ u8 thresh_timeout[2][2];
+ u8 mag_timeout[2][2];
+ int old_state;
+ char *conversion_mode;
+ struct mutex state_lock;
+};
+
+/*
+ * sysfs nodes
+ */
+
+static const u8 ad7150_addresses[][6] = {
+ { AD7150_CH1_DATA_HIGH, AD7150_CH1_AVG_HIGH,
+ AD7150_CH1_SETUP, AD7150_CH1_THR_HOLD_H,
+ AD7150_CH1_SENSITIVITY, AD7150_CH1_TIMEOUT },
+ { AD7150_CH2_DATA_HIGH, AD7150_CH2_AVG_HIGH,
+ AD7150_CH2_SETUP, AD7150_CH2_THR_HOLD_H,
+ AD7150_CH2_SENSITIVITY, AD7150_CH2_TIMEOUT },
+};
+
+static int ad7150_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long mask)
+{
+ int ret;
+ struct ad7150_chip_info *chip = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = i2c_smbus_read_word_data(chip->client,
+ ad7150_addresses[chan->channel][0]);
+ if (ret < 0)
+ return ret;
+ *val = swab16(ret);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_AVERAGE_RAW:
+ ret = i2c_smbus_read_word_data(chip->client,
+ ad7150_addresses[chan->channel][1]);
+ if (ret < 0)
+ return ret;
+ *val = swab16(ret);
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ad7150_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ int ret;
+ u8 threshtype;
+ bool adaptive;
+ struct ad7150_chip_info *chip = iio_priv(indio_dev);
+
+ ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG);
+ if (ret < 0)
+ return ret;
+
+ threshtype = (ret >> 5) & 0x03;
+ adaptive = !!(ret & 0x80);
+
+ switch (type) {
+ case IIO_EV_TYPE_MAG_ADAPTIVE:
+ if (dir == IIO_EV_DIR_RISING)
+ return adaptive && (threshtype == 0x1);
+ return adaptive && (threshtype == 0x0);
+ case IIO_EV_TYPE_THRESH_ADAPTIVE:
+ if (dir == IIO_EV_DIR_RISING)
+ return adaptive && (threshtype == 0x3);
+ return adaptive && (threshtype == 0x2);
+ case IIO_EV_TYPE_THRESH:
+ if (dir == IIO_EV_DIR_RISING)
+ return !adaptive && (threshtype == 0x1);
+ return !adaptive && (threshtype == 0x0);
+ default:
+ break;
+ }
+ return -EINVAL;
+}
+
+/* lock should be held */
+static int ad7150_write_event_params(struct iio_dev *indio_dev,
+ unsigned int chan, enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ int ret;
+ u16 value;
+ u8 sens, timeout;
+ struct ad7150_chip_info *chip = iio_priv(indio_dev);
+ int rising = (dir == IIO_EV_DIR_RISING);
+ u64 event_code;
+
+ event_code = IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE, chan, type, dir);
+
+ if (event_code != chip->current_event)
+ return 0;
+
+ switch (type) {
+ /* Note completely different from the adaptive versions */
+ case IIO_EV_TYPE_THRESH:
+ value = chip->threshold[rising][chan];
+ ret = i2c_smbus_write_word_data(chip->client,
+ ad7150_addresses[chan][3],
+ swab16(value));
+ if (ret < 0)
+ return ret;
+ return 0;
+ case IIO_EV_TYPE_MAG_ADAPTIVE:
+ sens = chip->mag_sensitivity[rising][chan];
+ timeout = chip->mag_timeout[rising][chan];
+ break;
+ case IIO_EV_TYPE_THRESH_ADAPTIVE:
+ sens = chip->thresh_sensitivity[rising][chan];
+ timeout = chip->thresh_timeout[rising][chan];
+ break;
+ default:
+ return -EINVAL;
+ }
+ ret = i2c_smbus_write_byte_data(chip->client,
+ ad7150_addresses[chan][4],
+ sens);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ ad7150_addresses[chan][5],
+ timeout);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ad7150_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan, enum iio_event_type type,
+ enum iio_event_direction dir, int state)
+{
+ u8 thresh_type, cfg, adaptive;
+ int ret;
+ struct ad7150_chip_info *chip = iio_priv(indio_dev);
+ int rising = (dir == IIO_EV_DIR_RISING);
+ u64 event_code;
+
+ /* Something must always be turned on */
+ if (state == 0)
+ return -EINVAL;
+
+ event_code = IIO_UNMOD_EVENT_CODE(chan->type, chan->channel, type, dir);
+ if (event_code == chip->current_event)
+ return 0;
+ mutex_lock(&chip->state_lock);
+ ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG);
+ if (ret < 0)
+ goto error_ret;
+
+ cfg = ret & ~((0x03 << 5) | (0x1 << 7));
+
+ switch (type) {
+ case IIO_EV_TYPE_MAG_ADAPTIVE:
+ adaptive = 1;
+ if (rising)
+ thresh_type = 0x1;
+ else
+ thresh_type = 0x0;
+ break;
+ case IIO_EV_TYPE_THRESH_ADAPTIVE:
+ adaptive = 1;
+ if (rising)
+ thresh_type = 0x3;
+ else
+ thresh_type = 0x2;
+ break;
+ case IIO_EV_TYPE_THRESH:
+ adaptive = 0;
+ if (rising)
+ thresh_type = 0x1;
+ else
+ thresh_type = 0x0;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error_ret;
+ }
+
+ cfg |= (!adaptive << 7) | (thresh_type << 5);
+
+ ret = i2c_smbus_write_byte_data(chip->client, AD7150_CFG, cfg);
+ if (ret < 0)
+ goto error_ret;
+
+ chip->current_event = event_code;
+
+ /* update control attributes */
+ ret = ad7150_write_event_params(indio_dev, chan->channel, type, dir);
+error_ret:
+ mutex_unlock(&chip->state_lock);
+
+ return 0;
+}
+
+static int ad7150_read_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ struct ad7150_chip_info *chip = iio_priv(indio_dev);
+ int rising = (dir == IIO_EV_DIR_RISING);
+
+ /* Complex register sharing going on here */
+ switch (type) {
+ case IIO_EV_TYPE_MAG_ADAPTIVE:
+ *val = chip->mag_sensitivity[rising][chan->channel];
+ return IIO_VAL_INT;
+ case IIO_EV_TYPE_THRESH_ADAPTIVE:
+ *val = chip->thresh_sensitivity[rising][chan->channel];
+ return IIO_VAL_INT;
+ case IIO_EV_TYPE_THRESH:
+ *val = chip->threshold[rising][chan->channel];
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ad7150_write_event_value(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ int ret;
+ struct ad7150_chip_info *chip = iio_priv(indio_dev);
+ int rising = (dir == IIO_EV_DIR_RISING);
+
+ mutex_lock(&chip->state_lock);
+ switch (type) {
+ case IIO_EV_TYPE_MAG_ADAPTIVE:
+ chip->mag_sensitivity[rising][chan->channel] = val;
+ break;
+ case IIO_EV_TYPE_THRESH_ADAPTIVE:
+ chip->thresh_sensitivity[rising][chan->channel] = val;
+ break;
+ case IIO_EV_TYPE_THRESH:
+ chip->threshold[rising][chan->channel] = val;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error_ret;
+ }
+
+ /* write back if active */
+ ret = ad7150_write_event_params(indio_dev, chan->channel, type, dir);
+
+error_ret:
+ mutex_unlock(&chip->state_lock);
+ return ret;
+}
+
+static ssize_t ad7150_show_timeout(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct ad7150_chip_info *chip = iio_priv(indio_dev);
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ u8 value;
+
+ /* use the event code for consistency reasons */
+ int chan = IIO_EVENT_CODE_EXTRACT_CHAN(this_attr->address);
+ int rising = !!(IIO_EVENT_CODE_EXTRACT_DIR(this_attr->address)
+ == IIO_EV_DIR_RISING);
+
+ switch (IIO_EVENT_CODE_EXTRACT_TYPE(this_attr->address)) {
+ case IIO_EV_TYPE_MAG_ADAPTIVE:
+ value = chip->mag_timeout[rising][chan];
+ break;
+ case IIO_EV_TYPE_THRESH_ADAPTIVE:
+ value = chip->thresh_timeout[rising][chan];
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return sprintf(buf, "%d\n", value);
+}
+
+static ssize_t ad7150_store_timeout(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct ad7150_chip_info *chip = iio_priv(indio_dev);
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ int chan = IIO_EVENT_CODE_EXTRACT_CHAN(this_attr->address);
+ enum iio_event_direction dir;
+ enum iio_event_type type;
+ int rising;
+ u8 data;
+ int ret;
+
+ type = IIO_EVENT_CODE_EXTRACT_TYPE(this_attr->address);
+ dir = IIO_EVENT_CODE_EXTRACT_DIR(this_attr->address);
+ rising = (dir == IIO_EV_DIR_RISING);
+
+ ret = kstrtou8(buf, 10, &data);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&chip->state_lock);
+ switch (type) {
+ case IIO_EV_TYPE_MAG_ADAPTIVE:
+ chip->mag_timeout[rising][chan] = data;
+ break;
+ case IIO_EV_TYPE_THRESH_ADAPTIVE:
+ chip->thresh_timeout[rising][chan] = data;
+ break;
+ default:
+ ret = -EINVAL;
+ goto error_ret;
+ }
+
+ ret = ad7150_write_event_params(indio_dev, chan, type, dir);
+error_ret:
+ mutex_unlock(&chip->state_lock);
+
+ if (ret < 0)
+ return ret;
+
+ return len;
+}
+
+#define AD7150_TIMEOUT(chan, type, dir, ev_type, ev_dir) \
+ IIO_DEVICE_ATTR(in_capacitance##chan##_##type##_##dir##_timeout, \
+ S_IRUGO | S_IWUSR, \
+ &ad7150_show_timeout, \
+ &ad7150_store_timeout, \
+ IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE, \
+ chan, \
+ IIO_EV_TYPE_##ev_type, \
+ IIO_EV_DIR_##ev_dir))
+static AD7150_TIMEOUT(0, mag_adaptive, rising, MAG_ADAPTIVE, RISING);
+static AD7150_TIMEOUT(0, mag_adaptive, falling, MAG_ADAPTIVE, FALLING);
+static AD7150_TIMEOUT(1, mag_adaptive, rising, MAG_ADAPTIVE, RISING);
+static AD7150_TIMEOUT(1, mag_adaptive, falling, MAG_ADAPTIVE, FALLING);
+static AD7150_TIMEOUT(0, thresh_adaptive, rising, THRESH_ADAPTIVE, RISING);
+static AD7150_TIMEOUT(0, thresh_adaptive, falling, THRESH_ADAPTIVE, FALLING);
+static AD7150_TIMEOUT(1, thresh_adaptive, rising, THRESH_ADAPTIVE, RISING);
+static AD7150_TIMEOUT(1, thresh_adaptive, falling, THRESH_ADAPTIVE, FALLING);
+
+static const struct iio_event_spec ad7150_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH_ADAPTIVE,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_THRESH_ADAPTIVE,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_MAG_ADAPTIVE,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_MAG_ADAPTIVE,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec ad7150_channels[] = {
+ {
+ .type = IIO_CAPACITANCE,
+ .indexed = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_AVERAGE_RAW),
+ .event_spec = ad7150_events,
+ .num_event_specs = ARRAY_SIZE(ad7150_events),
+ }, {
+ .type = IIO_CAPACITANCE,
+ .indexed = 1,
+ .channel = 1,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_AVERAGE_RAW),
+ .event_spec = ad7150_events,
+ .num_event_specs = ARRAY_SIZE(ad7150_events),
+ },
+};
+
+/*
+ * 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();
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(chip->client, AD7150_STATUS);
+ if (ret < 0)
+ return IRQ_HANDLED;
+
+ int_status = ret;
+
+ if ((int_status & AD7150_STATUS_OUT1) &&
+ !(chip->old_state & AD7150_STATUS_OUT1))
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE,
+ 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,
+ IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE,
+ 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,
+ IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE,
+ 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,
+ IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE,
+ 1,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ timestamp);
+ /* store the status to avoid repushing same events */
+ chip->old_state = int_status;
+
+ return IRQ_HANDLED;
+}
+
+/* Timeouts not currently handled by core */
+static struct attribute *ad7150_event_attributes[] = {
+ &iio_dev_attr_in_capacitance0_mag_adaptive_rising_timeout
+ .dev_attr.attr,
+ &iio_dev_attr_in_capacitance0_mag_adaptive_falling_timeout
+ .dev_attr.attr,
+ &iio_dev_attr_in_capacitance1_mag_adaptive_rising_timeout
+ .dev_attr.attr,
+ &iio_dev_attr_in_capacitance1_mag_adaptive_falling_timeout
+ .dev_attr.attr,
+ &iio_dev_attr_in_capacitance0_thresh_adaptive_rising_timeout
+ .dev_attr.attr,
+ &iio_dev_attr_in_capacitance0_thresh_adaptive_falling_timeout
+ .dev_attr.attr,
+ &iio_dev_attr_in_capacitance1_thresh_adaptive_rising_timeout
+ .dev_attr.attr,
+ &iio_dev_attr_in_capacitance1_thresh_adaptive_falling_timeout
+ .dev_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ad7150_event_attribute_group = {
+ .attrs = ad7150_event_attributes,
+ .name = "events",
+};
+
+static const struct iio_info ad7150_info = {
+ .event_attrs = &ad7150_event_attribute_group,
+ .driver_module = THIS_MODULE,
+ .read_raw = &ad7150_read_raw,
+ .read_event_config = &ad7150_read_event_config,
+ .write_event_config = &ad7150_write_event_config,
+ .read_event_value = &ad7150_read_event_value,
+ .write_event_value = &ad7150_write_event_value,
+};
+
+/*
+ * device probe and remove
+ */
+
+static int ad7150_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct ad7150_chip_info *chip;
+ struct iio_dev *indio_dev;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+ chip = iio_priv(indio_dev);
+ mutex_init(&chip->state_lock);
+ /* this is only used for device removal purposes */
+ i2c_set_clientdata(client, indio_dev);
+
+ chip->client = client;
+
+ indio_dev->name = id->name;
+ indio_dev->channels = ad7150_channels;
+ indio_dev->num_channels = ARRAY_SIZE(ad7150_channels);
+ /* Establish that the iio_dev is a child of the i2c device */
+ indio_dev->dev.parent = &client->dev;
+
+ indio_dev->info = &ad7150_info;
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ if (client->irq) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL,
+ &ad7150_event_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "ad7150_irq1",
+ indio_dev);
+ if (ret)
+ return ret;
+ }
+
+ if (client->dev.platform_data) {
+ ret = devm_request_threaded_irq(&client->dev, *(unsigned int *)
+ client->dev.platform_data,
+ NULL,
+ &ad7150_event_handler,
+ IRQF_TRIGGER_RISING |
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ "ad7150_irq2",
+ indio_dev);
+ if (ret)
+ return ret;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ return ret;
+
+ dev_info(&client->dev, "%s capacitive sensor registered,irq: %d\n",
+ id->name, client->irq);
+
+ return 0;
+}
+
+static int ad7150_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ 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 = ad7150_remove,
+ .id_table = ad7150_id,
+};
+module_i2c_driver(ad7150_driver);
+
+MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
+MODULE_DESCRIPTION("Analog Devices AD7150/1/6 capacitive sensor driver");
+MODULE_LICENSE("GPL v2");
Code Review / kvmfornfv.git / blobdiff