forked from Minki/linux
iio: chemical: atlas-ph-sensor: reorg driver to allow multiple chips
Signed-off-by: Matt Ranostay <mranostay@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Matt Ranostay
Jonathan Cameron
parent
5d48d6b020
commit
7103b99b03
@ -24,6 +24,7 @@
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#include <linux/irq_work.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/buffer.h>
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@ -43,20 +44,25 @@
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#define ATLAS_REG_PWR_CONTROL 0x06
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#define ATLAS_REG_CALIB_STATUS 0x0d
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#define ATLAS_REG_CALIB_STATUS_MASK 0x07
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#define ATLAS_REG_CALIB_STATUS_LOW BIT(0)
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#define ATLAS_REG_CALIB_STATUS_MID BIT(1)
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#define ATLAS_REG_CALIB_STATUS_HIGH BIT(2)
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#define ATLAS_REG_PH_CALIB_STATUS 0x0d
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#define ATLAS_REG_PH_CALIB_STATUS_MASK 0x07
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#define ATLAS_REG_PH_CALIB_STATUS_LOW BIT(0)
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#define ATLAS_REG_PH_CALIB_STATUS_MID BIT(1)
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#define ATLAS_REG_PH_CALIB_STATUS_HIGH BIT(2)
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#define ATLAS_REG_TEMP_DATA 0x0e
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#define ATLAS_REG_PH_TEMP_DATA 0x0e
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#define ATLAS_REG_PH_DATA 0x16
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#define ATLAS_PH_INT_TIME_IN_US 450000
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enum {
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ATLAS_PH_SM,
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};
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struct atlas_data {
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struct i2c_client *client;
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struct iio_trigger *trig;
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struct atlas_device *chip;
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struct regmap *regmap;
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struct irq_work work;
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@ -84,9 +90,10 @@ static const struct regmap_config atlas_regmap_config = {
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.cache_type = REGCACHE_RBTREE,
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};
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static const struct iio_chan_spec atlas_channels[] = {
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static const struct iio_chan_spec atlas_ph_channels[] = {
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{
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.type = IIO_PH,
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.address = ATLAS_REG_PH_DATA,
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.info_mask_separate =
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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.scan_index = 0,
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@ -100,7 +107,7 @@ static const struct iio_chan_spec atlas_channels[] = {
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IIO_CHAN_SOFT_TIMESTAMP(1),
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{
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.type = IIO_TEMP,
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.address = ATLAS_REG_TEMP_DATA,
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.address = ATLAS_REG_PH_TEMP_DATA,
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.info_mask_separate =
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BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
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.output = 1,
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@ -108,6 +115,52 @@ static const struct iio_chan_spec atlas_channels[] = {
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},
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};
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static int atlas_check_ph_calibration(struct atlas_data *data)
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{
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struct device *dev = &data->client->dev;
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int ret;
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unsigned int val;
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ret = regmap_read(data->regmap, ATLAS_REG_PH_CALIB_STATUS, &val);
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if (ret)
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return ret;
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if (!(val & ATLAS_REG_PH_CALIB_STATUS_MASK)) {
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dev_warn(dev, "device has not been calibrated\n");
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return 0;
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}
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if (!(val & ATLAS_REG_PH_CALIB_STATUS_LOW))
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dev_warn(dev, "device missing low point calibration\n");
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if (!(val & ATLAS_REG_PH_CALIB_STATUS_MID))
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dev_warn(dev, "device missing mid point calibration\n");
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if (!(val & ATLAS_REG_PH_CALIB_STATUS_HIGH))
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dev_warn(dev, "device missing high point calibration\n");
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return 0;
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}
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struct atlas_device {
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const struct iio_chan_spec *channels;
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int num_channels;
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int data_reg;
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int (*calibration)(struct atlas_data *data);
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int delay;
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};
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static struct atlas_device atlas_devices[] = {
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[ATLAS_PH_SM] = {
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.channels = atlas_ph_channels,
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.num_channels = 3,
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.data_reg = ATLAS_REG_PH_DATA,
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.calibration = &atlas_check_ph_calibration,
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.delay = ATLAS_PH_INT_TIME_IN_US,
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},
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};
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static int atlas_set_powermode(struct atlas_data *data, int on)
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{
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return regmap_write(data->regmap, ATLAS_REG_PWR_CONTROL, on);
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@ -178,8 +231,9 @@ static irqreturn_t atlas_trigger_handler(int irq, void *private)
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struct atlas_data *data = iio_priv(indio_dev);
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int ret;
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ret = regmap_bulk_read(data->regmap, ATLAS_REG_PH_DATA,
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(u8 *) &data->buffer, sizeof(data->buffer[0]));
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ret = regmap_bulk_read(data->regmap, data->chip->data_reg,
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(u8 *) &data->buffer,
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sizeof(__be32) * (data->chip->num_channels - 2));
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if (!ret)
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iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
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@ -200,7 +254,7 @@ static irqreturn_t atlas_interrupt_handler(int irq, void *private)
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return IRQ_HANDLED;
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}
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static int atlas_read_ph_measurement(struct atlas_data *data, __be32 *val)
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static int atlas_read_measurement(struct atlas_data *data, int reg, __be32 *val)
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{
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struct device *dev = &data->client->dev;
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int suspended = pm_runtime_suspended(dev);
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@ -213,11 +267,9 @@ static int atlas_read_ph_measurement(struct atlas_data *data, __be32 *val)
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}
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if (suspended)
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usleep_range(ATLAS_PH_INT_TIME_IN_US,
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ATLAS_PH_INT_TIME_IN_US + 100000);
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usleep_range(data->chip->delay, data->chip->delay + 100000);
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ret = regmap_bulk_read(data->regmap, ATLAS_REG_PH_DATA,
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(u8 *) val, sizeof(*val));
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ret = regmap_bulk_read(data->regmap, reg, (u8 *) val, sizeof(*val));
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pm_runtime_mark_last_busy(dev);
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pm_runtime_put_autosuspend(dev);
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@ -247,7 +299,8 @@ static int atlas_read_raw(struct iio_dev *indio_dev,
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if (iio_buffer_enabled(indio_dev))
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ret = -EBUSY;
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else
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ret = atlas_read_ph_measurement(data, ®);
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ret = atlas_read_measurement(data,
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chan->address, ®);
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mutex_unlock(&indio_dev->mlock);
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break;
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@ -303,37 +356,24 @@ static const struct iio_info atlas_info = {
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.write_raw = atlas_write_raw,
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};
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static int atlas_check_calibration(struct atlas_data *data)
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{
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struct device *dev = &data->client->dev;
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int ret;
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unsigned int val;
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ret = regmap_read(data->regmap, ATLAS_REG_CALIB_STATUS, &val);
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if (ret)
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return ret;
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if (!(val & ATLAS_REG_CALIB_STATUS_MASK)) {
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dev_warn(dev, "device has not been calibrated\n");
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return 0;
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}
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if (!(val & ATLAS_REG_CALIB_STATUS_LOW))
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dev_warn(dev, "device missing low point calibration\n");
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if (!(val & ATLAS_REG_CALIB_STATUS_MID))
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dev_warn(dev, "device missing mid point calibration\n");
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if (!(val & ATLAS_REG_CALIB_STATUS_HIGH))
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dev_warn(dev, "device missing high point calibration\n");
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return 0;
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static const struct i2c_device_id atlas_id[] = {
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{ "atlas-ph-sm", ATLAS_PH_SM},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, atlas_id);
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static const struct of_device_id atlas_dt_ids[] = {
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{ .compatible = "atlas,ph-sm", .data = (void *)ATLAS_PH_SM, },
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{ }
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};
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MODULE_DEVICE_TABLE(of, atlas_dt_ids);
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static int atlas_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct atlas_data *data;
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struct atlas_device *chip;
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const struct of_device_id *of_id;
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struct iio_trigger *trig;
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struct iio_dev *indio_dev;
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int ret;
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@ -342,10 +382,16 @@ static int atlas_probe(struct i2c_client *client,
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if (!indio_dev)
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return -ENOMEM;
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of_id = of_match_device(atlas_dt_ids, &client->dev);
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if (!of_id)
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chip = &atlas_devices[id->driver_data];
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else
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chip = &atlas_devices[(unsigned long)of_id->data];
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indio_dev->info = &atlas_info;
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indio_dev->name = ATLAS_DRV_NAME;
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indio_dev->channels = atlas_channels;
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indio_dev->num_channels = ARRAY_SIZE(atlas_channels);
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indio_dev->channels = chip->channels;
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indio_dev->num_channels = chip->num_channels;
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indio_dev->modes = INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE;
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indio_dev->dev.parent = &client->dev;
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@ -358,6 +404,7 @@ static int atlas_probe(struct i2c_client *client,
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data = iio_priv(indio_dev);
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data->client = client;
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data->trig = trig;
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data->chip = chip;
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trig->dev.parent = indio_dev->dev.parent;
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trig->ops = &atlas_interrupt_trigger_ops;
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iio_trigger_set_drvdata(trig, indio_dev);
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@ -379,7 +426,7 @@ static int atlas_probe(struct i2c_client *client,
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return -EINVAL;
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}
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ret = atlas_check_calibration(data);
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ret = chip->calibration(data);
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if (ret)
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return ret;
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@ -480,18 +527,6 @@ static const struct dev_pm_ops atlas_pm_ops = {
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atlas_runtime_resume, NULL)
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};
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static const struct i2c_device_id atlas_id[] = {
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{ "atlas-ph-sm", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, atlas_id);
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static const struct of_device_id atlas_dt_ids[] = {
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{ .compatible = "atlas,ph-sm" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, atlas_dt_ids);
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static struct i2c_driver atlas_driver = {
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.driver = {
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.name = ATLAS_DRV_NAME,
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