staging:iio:adc:ad799x move to new event handling

Untested.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/adc/ad799x.h b/drivers/staging/iio/adc/ad799x.h
index a421362..503fa61 100644 (file)
--- a/drivers/staging/iio/adc/ad799x.h
+++ b/drivers/staging/iio/adc/ad799x.h
@@ -114,7 +114,6 @@ struct ad799x_state {
        struct i2c_client               *client;
        const struct ad799x_chip_info   *chip_info;
        struct work_struct              poll_work;
-       struct work_struct              work_thresh;
        atomic_t                        protect_ring;
        size_t                          d_size;
        struct iio_trigger              *trig;

diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c
index 09d109f..34fc85c 100644 (file)
--- a/drivers/staging/iio/adc/ad799x_core.c
+++ b/drivers/staging/iio/adc/ad799x_core.c
@@ -338,11 +338,11 @@ static ssize_t ad799x_read_channel_config(struct device *dev,
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
        struct ad799x_state *st = iio_dev_get_devdata(dev_info);
-       struct iio_event_attr *this_attr = to_iio_event_attr(attr);
+       struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
        int ret;
        u16 val;
-       ret = ad799x_i2c_read16(st, this_attr->mask, &val);
+       ret = ad799x_i2c_read16(st, this_attr->address, &val);
        if (ret)
                return ret;
 
@@ -356,7 +356,7 @@ static ssize_t ad799x_write_channel_config(struct device *dev,
 {
        struct iio_dev *dev_info = dev_get_drvdata(dev);
        struct ad799x_state *st = iio_dev_get_devdata(dev_info);
-       struct iio_event_attr *this_attr = to_iio_event_attr(attr);
+       struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 
        long val;
        int ret;
@@ -366,54 +366,40 @@ static ssize_t ad799x_write_channel_config(struct device *dev,
                return ret;
 
        mutex_lock(&dev_info->mlock);
-       ret = ad799x_i2c_write16(st, this_attr->mask, val);
+       ret = ad799x_i2c_write16(st, this_attr->address, val);
        mutex_unlock(&dev_info->mlock);
 
        return ret ? ret : len;
 }
 
-static void ad799x_interrupt_bh(struct work_struct *work_s)
+static irqreturn_t ad799x_event_handler(int irq, void *private)
 {
-       struct ad799x_state *st = container_of(work_s,
-               struct ad799x_state, work_thresh);
+       struct iio_dev *indio_dev = private;
+       struct ad799x_state *st = iio_dev_get_devdata(private);
        u8 status;
-       int i;
+       int i, ret;
 
-       if (ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status))
-               goto err_out;
+       ret = ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status);
+       if (ret)
+               return ret;
 
        if (!status)
-               goto err_out;
+               return -EIO;
 
        ad799x_i2c_write8(st, AD7998_ALERT_STAT_REG, AD7998_ALERT_STAT_CLEAR);
 
        for (i = 0; i < 8; i++) {
                if (status & (1 << i))
-                       iio_push_event(st->indio_dev, 0,
-                               i & 0x1 ?
-                               IIO_EVENT_CODE_IN_HIGH_THRESH(i >> 1) :
-                               IIO_EVENT_CODE_IN_LOW_THRESH(i >> 1),
-                               st->last_timestamp);
+                       iio_push_event(indio_dev, 0,
+                                      i & 0x1 ?
+                                      IIO_EVENT_CODE_IN_HIGH_THRESH(i >> 1) :
+                                      IIO_EVENT_CODE_IN_LOW_THRESH(i >> 1),
+                                      iio_get_time_ns());
        }
 
-err_out:
-       enable_irq(st->client->irq);
-}
-
-static int ad799x_interrupt(struct iio_dev *dev_info,
-               int index,
-               s64 timestamp,
-               int no_test)
-{
-       struct ad799x_state *st = dev_info->dev_data;
-
-       st->last_timestamp = timestamp;
-       schedule_work(&st->work_thresh);
-       return 0;
+       return IRQ_HANDLED;
 }
 
-IIO_EVENT_SH(ad799x, &ad799x_interrupt);
-
 /* Direct read attribtues */
 static IIO_DEV_ATTR_IN_RAW(0, ad799x_read_single_channel, 0);
 static IIO_DEV_ATTR_IN_RAW(1, ad799x_read_single_channel, 1);
@@ -562,77 +548,77 @@ static struct attribute_group ad7997_8_scan_el_group = {
        .attrs = ad7997_8_scan_el_attrs,
 };
 
-IIO_EVENT_ATTR_SH(in0_thresh_low_value,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_DATALOW_CH1_REG);
-
-IIO_EVENT_ATTR_SH(in0_thresh_high_value,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_DATAHIGH_CH1_REG);
-
-IIO_EVENT_ATTR_SH(in0_thresh_both_hyst_raw,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_HYST_CH1_REG);
-
-IIO_EVENT_ATTR_SH(in1_thresh_low_value,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_DATALOW_CH2_REG);
-
-IIO_EVENT_ATTR_SH(in1_thresh_high_value,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_DATAHIGH_CH2_REG);
-
-IIO_EVENT_ATTR_SH(in1_thresh_both_hyst_raw,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_HYST_CH2_REG);
-
-IIO_EVENT_ATTR_SH(in2_thresh_low_value,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_DATALOW_CH3_REG);
-
-IIO_EVENT_ATTR_SH(in2_thresh_high_value,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_DATAHIGH_CH3_REG);
-
-IIO_EVENT_ATTR_SH(in2_thresh_both_hyst_raw,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_HYST_CH3_REG);
-
-IIO_EVENT_ATTR_SH(in3_thresh_low_value,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_DATALOW_CH4_REG);
-
-IIO_EVENT_ATTR_SH(in3_thresh_high_value,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_DATAHIGH_CH4_REG);
-
-IIO_EVENT_ATTR_SH(in3_thresh_both_hyst_raw,
-                 iio_event_ad799x,
-                 ad799x_read_channel_config,
-                 ad799x_write_channel_config,
-                 AD7998_HYST_CH4_REG);
+static IIO_DEVICE_ATTR(in0_thresh_low_value,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_DATALOW_CH1_REG);
+
+static IIO_DEVICE_ATTR(in0_thresh_high_value,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_DATAHIGH_CH1_REG);
+
+static IIO_DEVICE_ATTR(in0_thresh_both_hyst_raw,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_HYST_CH1_REG);
+
+static IIO_DEVICE_ATTR(in1_thresh_low_value,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_DATALOW_CH2_REG);
+
+static IIO_DEVICE_ATTR(in1_thresh_high_value,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_DATAHIGH_CH2_REG);
+
+static IIO_DEVICE_ATTR(in1_thresh_both_hyst_raw,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_HYST_CH2_REG);
+
+static IIO_DEVICE_ATTR(in2_thresh_low_value,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_DATALOW_CH3_REG);
+
+static IIO_DEVICE_ATTR(in2_thresh_high_value,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_DATAHIGH_CH3_REG);
+
+static IIO_DEVICE_ATTR(in2_thresh_both_hyst_raw,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_HYST_CH3_REG);
+
+static IIO_DEVICE_ATTR(in3_thresh_low_value,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_DATALOW_CH4_REG);
+
+static IIO_DEVICE_ATTR(in3_thresh_high_value,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_DATAHIGH_CH4_REG);
+
+static IIO_DEVICE_ATTR(in3_thresh_both_hyst_raw,
+                      S_IRUGO | S_IWUSR,
+                      ad799x_read_channel_config,
+                      ad799x_write_channel_config,
+                      AD7998_HYST_CH4_REG);
 
 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
                              ad799x_read_frequency,
@@ -640,18 +626,18 @@ static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0");
 
 static struct attribute *ad7993_4_7_8_event_attributes[] = {
-       &iio_event_attr_in0_thresh_low_value.dev_attr.attr,
-       &iio_event_attr_in0_thresh_high_value.dev_attr.attr,
-       &iio_event_attr_in0_thresh_both_hyst_raw.dev_attr.attr,
-       &iio_event_attr_in1_thresh_low_value.dev_attr.attr,
-       &iio_event_attr_in1_thresh_high_value.dev_attr.attr,
-       &iio_event_attr_in1_thresh_both_hyst_raw.dev_attr.attr,
-       &iio_event_attr_in2_thresh_low_value.dev_attr.attr,
-       &iio_event_attr_in2_thresh_high_value.dev_attr.attr,
-       &iio_event_attr_in2_thresh_both_hyst_raw.dev_attr.attr,
-       &iio_event_attr_in3_thresh_low_value.dev_attr.attr,
-       &iio_event_attr_in3_thresh_high_value.dev_attr.attr,
-       &iio_event_attr_in3_thresh_both_hyst_raw.dev_attr.attr,
+       &iio_dev_attr_in0_thresh_low_value.dev_attr.attr,
+       &iio_dev_attr_in0_thresh_high_value.dev_attr.attr,
+       &iio_dev_attr_in0_thresh_both_hyst_raw.dev_attr.attr,
+       &iio_dev_attr_in1_thresh_low_value.dev_attr.attr,
+       &iio_dev_attr_in1_thresh_high_value.dev_attr.attr,
+       &iio_dev_attr_in1_thresh_both_hyst_raw.dev_attr.attr,
+       &iio_dev_attr_in2_thresh_low_value.dev_attr.attr,
+       &iio_dev_attr_in2_thresh_high_value.dev_attr.attr,
+       &iio_dev_attr_in2_thresh_both_hyst_raw.dev_attr.attr,
+       &iio_dev_attr_in3_thresh_low_value.dev_attr.attr,
+       &iio_dev_attr_in3_thresh_high_value.dev_attr.attr,
+       &iio_dev_attr_in3_thresh_both_hyst_raw.dev_attr.attr,
        &iio_dev_attr_sampling_frequency.dev_attr.attr,
        &iio_const_attr_sampling_frequency_available.dev_attr.attr,
        NULL,
@@ -662,12 +648,12 @@ static struct attribute_group ad7993_4_7_8_event_attrs_group = {
 };
 
 static struct attribute *ad7992_event_attributes[] = {
-       &iio_event_attr_in0_thresh_low_value.dev_attr.attr,
-       &iio_event_attr_in0_thresh_high_value.dev_attr.attr,
-       &iio_event_attr_in0_thresh_both_hyst_raw.dev_attr.attr,
-       &iio_event_attr_in1_thresh_low_value.dev_attr.attr,
-       &iio_event_attr_in1_thresh_high_value.dev_attr.attr,
-       &iio_event_attr_in1_thresh_both_hyst_raw.dev_attr.attr,
+       &iio_dev_attr_in0_thresh_low_value.dev_attr.attr,
+       &iio_dev_attr_in0_thresh_high_value.dev_attr.attr,
+       &iio_dev_attr_in0_thresh_both_hyst_raw.dev_attr.attr,
+       &iio_dev_attr_in1_thresh_low_value.dev_attr.attr,
+       &iio_dev_attr_in1_thresh_high_value.dev_attr.attr,
+       &iio_dev_attr_in1_thresh_both_hyst_raw.dev_attr.attr,
        &iio_dev_attr_sampling_frequency.dev_attr.attr,
        &iio_const_attr_sampling_frequency_available.dev_attr.attr,
        NULL,
@@ -835,23 +821,15 @@ static int __devinit ad799x_probe(struct i2c_client *client,
                goto error_cleanup_ring;
 
        if (client->irq > 0 && st->chip_info->monitor_mode) {
-               INIT_WORK(&st->work_thresh, ad799x_interrupt_bh);
-
-               ret = iio_register_interrupt_line(client->irq,
-                               st->indio_dev,
-                               0,
-                               IRQF_TRIGGER_FALLING,
-                               client->name);
+               ret = request_threaded_irq(client->irq,
+                                          NULL,
+                                          ad799x_event_handler,
+                                          IRQF_TRIGGER_FALLING |
+                                          IRQF_ONESHOT,
+                                          client->name,
+                                          st->indio_dev);
                if (ret)
                        goto error_cleanup_ring;
-
-               /*
-                * The event handler list element refer to iio_event_ad799x.
-                * All event attributes bind to the same event handler.
-                * So, only register event handler once.
-                */
-               iio_add_event_to_list(&iio_event_ad799x,
-                               &st->indio_dev->interrupts[0]->ev_list);
        }
 
        return 0;
@@ -879,7 +857,7 @@ static __devexit int ad799x_remove(struct i2c_client *client)
        struct iio_dev *indio_dev = st->indio_dev;
 
        if (client->irq > 0 && st->chip_info->monitor_mode)
-               iio_unregister_interrupt_line(indio_dev, 0);
+               free_irq(client->irq, indio_dev);
 
        iio_ring_buffer_unregister(indio_dev->ring);
        ad799x_ring_cleanup(indio_dev);