staging:iio:ad799x: Use event spec for threshold hysteresis
Register the event threshold hysteresis attributes by using the new IIO_EV_INFO_HYSTERESIS event spec type. This allows us to throw away a good portion of boiler-plate code. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen
Jonathan Cameron
parent
69582b8884
commit
ba1d79613d
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@ -259,13 +259,23 @@ static int ad799x_read_event_config(struct iio_dev *indio_dev,
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return 1;
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}
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static int ad799x_threshold_reg(const struct iio_chan_spec *chan,
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enum iio_event_direction dir)
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static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan,
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enum iio_event_direction dir,
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enum iio_event_info info)
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{
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switch (info) {
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case IIO_EV_INFO_VALUE:
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if (dir == IIO_EV_DIR_FALLING)
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return AD7998_DATALOW_REG(chan->channel);
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else
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return AD7998_DATAHIGH_REG(chan->channel);
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case IIO_EV_INFO_HYSTERESIS:
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return AD7998_HYST_REG(chan->channel);
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int ad799x_write_event_value(struct iio_dev *indio_dev,
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@ -279,7 +289,8 @@ static int ad799x_write_event_value(struct iio_dev *indio_dev,
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struct ad799x_state *st = iio_priv(indio_dev);
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mutex_lock(&indio_dev->mlock);
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ret = ad799x_i2c_write16(st, ad799x_threshold_reg(chan, dir), val);
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ret = ad799x_i2c_write16(st, ad799x_threshold_reg(chan, dir, info),
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val);
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mutex_unlock(&indio_dev->mlock);
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return ret;
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@ -297,7 +308,8 @@ static int ad799x_read_event_value(struct iio_dev *indio_dev,
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u16 valin;
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mutex_lock(&indio_dev->mlock);
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ret = ad799x_i2c_read16(st, ad799x_threshold_reg(chan, dir), &valin);
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ret = ad799x_i2c_read16(st, ad799x_threshold_reg(chan, dir, info),
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&valin);
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mutex_unlock(&indio_dev->mlock);
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if (ret < 0)
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return ret;
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@ -306,46 +318,6 @@ static int ad799x_read_event_value(struct iio_dev *indio_dev,
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return IIO_VAL_INT;
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}
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static ssize_t ad799x_read_channel_config(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct ad799x_state *st = iio_priv(indio_dev);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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int ret;
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u16 val;
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ret = ad799x_i2c_read16(st, this_attr->address, &val);
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if (ret)
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return ret;
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return sprintf(buf, "%d\n", val);
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}
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static ssize_t ad799x_write_channel_config(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct iio_dev *indio_dev = dev_to_iio_dev(dev);
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struct ad799x_state *st = iio_priv(indio_dev);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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long val;
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int ret;
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ret = kstrtol(buf, 10, &val);
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if (ret)
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return ret;
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mutex_lock(&indio_dev->mlock);
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ret = ad799x_i2c_write16(st, this_attr->address, val);
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mutex_unlock(&indio_dev->mlock);
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return ret ? ret : len;
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}
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static irqreturn_t ad799x_event_handler(int irq, void *private)
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{
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struct iio_dev *indio_dev = private;
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@ -381,60 +353,19 @@ done:
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return IRQ_HANDLED;
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}
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static IIO_DEVICE_ATTR(in_voltage0_thresh_both_hyst_raw,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_HYST_REG(0));
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static IIO_DEVICE_ATTR(in_voltage1_thresh_both_hyst_raw,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_HYST_REG(1));
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static IIO_DEVICE_ATTR(in_voltage2_thresh_both_hyst_raw,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_HYST_REG(2));
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static IIO_DEVICE_ATTR(in_voltage3_thresh_both_hyst_raw,
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S_IRUGO | S_IWUSR,
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ad799x_read_channel_config,
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ad799x_write_channel_config,
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AD7998_HYST_REG(3));
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static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
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ad799x_read_frequency,
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ad799x_write_frequency);
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static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0");
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static struct attribute *ad7993_4_7_8_event_attributes[] = {
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&iio_dev_attr_in_voltage0_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_in_voltage1_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_in_voltage2_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_in_voltage3_thresh_both_hyst_raw.dev_attr.attr,
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static struct attribute *ad799x_event_attributes[] = {
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&iio_dev_attr_sampling_frequency.dev_attr.attr,
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&iio_const_attr_sampling_frequency_available.dev_attr.attr,
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NULL,
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};
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static struct attribute_group ad7993_4_7_8_event_attrs_group = {
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.attrs = ad7993_4_7_8_event_attributes,
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.name = "events",
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};
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static struct attribute *ad7992_event_attributes[] = {
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&iio_dev_attr_in_voltage0_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_in_voltage1_thresh_both_hyst_raw.dev_attr.attr,
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&iio_dev_attr_sampling_frequency.dev_attr.attr,
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&iio_const_attr_sampling_frequency_available.dev_attr.attr,
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NULL,
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};
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static struct attribute_group ad7992_event_attrs_group = {
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.attrs = ad7992_event_attributes,
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static struct attribute_group ad799x_event_attrs_group = {
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.attrs = ad799x_event_attributes,
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.name = "events",
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};
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@ -443,18 +374,9 @@ static const struct iio_info ad7991_info = {
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.driver_module = THIS_MODULE,
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};
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static const struct iio_info ad7992_info = {
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.read_raw = &ad799x_read_raw,
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.event_attrs = &ad7992_event_attrs_group,
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.read_event_config_new = &ad799x_read_event_config,
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.read_event_value_new = &ad799x_read_event_value,
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.write_event_value_new = &ad799x_write_event_value,
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.driver_module = THIS_MODULE,
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};
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static const struct iio_info ad7993_4_7_8_info = {
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.read_raw = &ad799x_read_raw,
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.event_attrs = &ad7993_4_7_8_event_attrs_group,
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.event_attrs = &ad799x_event_attrs_group,
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.read_event_config_new = &ad799x_read_event_config,
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.read_event_value_new = &ad799x_read_event_value,
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.write_event_value_new = &ad799x_write_event_value,
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@ -473,6 +395,10 @@ static const struct iio_event_spec ad799x_events[] = {
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.dir = IIO_EV_DIR_FALLING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE),
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BIT(IIO_EV_INFO_ENABLE),
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}, {
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_EITHER,
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.mask_separate = BIT(IIO_EV_INFO_HYSTERESIS),
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},
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};
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@ -537,7 +463,7 @@ static const struct ad799x_chip_info ad799x_chip_info_tbl[] = {
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},
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.num_channels = 3,
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.default_config = AD7998_ALERT_EN,
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.info = &ad7992_info,
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.info = &ad7993_4_7_8_info,
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},
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[ad7993] = {
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.channel = {
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