staging:iio:adc:ad7606 Convert to new channel registration method Update Add missing call to iio_trigger_notify_done() Set pollfunc top and bottom half handler
V3: rebase fixup. Backported to relevant merge point by Jonathan Cameron. V2: IIO_CHAN macro usage update Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>hifive-unleashed-5.1
Michael Hennerich
Greg Kroah-Hartman
parent
29b7f43ef4
commit
1caf7cb461
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@ -43,10 +43,9 @@ struct ad7606_platform_data {
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/**
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* struct ad7606_chip_info - chip specifc information
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* @name: indentification string for chip
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* @bits: accuracy of the adc in bits
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* @bits: output coding [s]igned or [u]nsigned
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* @int_vref_mv: the internal reference voltage
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* @num_channels: number of physical inputs on chip
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* @channels: channel specification
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* @num_channels: number of channels
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*/
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struct ad7606_chip_info {
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@ -54,6 +53,7 @@ struct ad7606_chip_info {
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u8 bits;
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char sign;
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u16 int_vref_mv;
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struct iio_chan_spec *channels;
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unsigned num_channels;
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};
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@ -69,7 +69,6 @@ struct ad7606_state {
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struct regulator *reg;
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struct work_struct poll_work;
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wait_queue_head_t wq_data_avail;
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atomic_t protect_ring;
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size_t d_size;
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const struct ad7606_bus_ops *bops;
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int irq;
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@ -78,62 +78,39 @@ error_ret:
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return ret;
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}
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static ssize_t ad7606_scan(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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static int ad7606_read_raw(struct iio_dev *dev_info,
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struct iio_chan_spec const *chan,
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int *val,
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int *val2,
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long m)
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{
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct ad7606_state *st = dev_info->dev_data;
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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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struct ad7606_state *st = dev_info->dev_data;
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unsigned int scale_uv;
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mutex_lock(&dev_info->mlock);
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if (iio_ring_enabled(dev_info))
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ret = ad7606_scan_from_ring(st, this_attr->address);
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else
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ret = ad7606_scan_direct(st, this_attr->address);
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mutex_unlock(&dev_info->mlock);
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switch (m) {
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case 0:
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mutex_lock(&dev_info->mlock);
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if (iio_ring_enabled(dev_info))
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ret = ad7606_scan_from_ring(st, chan->address);
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else
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ret = ad7606_scan_direct(st, chan->address);
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mutex_unlock(&dev_info->mlock);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%d\n", (short) ret);
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if (ret < 0)
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return ret;
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*val = (short) ret;
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return IIO_VAL_INT;
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case (1 << IIO_CHAN_INFO_SCALE_SHARED):
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scale_uv = (st->range * 1000 * 2)
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>> st->chip_info->channels[0].scan_type.realbits;
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*val = scale_uv / 1000;
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*val2 = (scale_uv % 1000) * 1000;
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return IIO_VAL_INT_PLUS_MICRO;
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}
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return -EINVAL;
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}
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static IIO_DEV_ATTR_IN_RAW(0, ad7606_scan, 0);
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static IIO_DEV_ATTR_IN_RAW(1, ad7606_scan, 1);
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static IIO_DEV_ATTR_IN_RAW(2, ad7606_scan, 2);
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static IIO_DEV_ATTR_IN_RAW(3, ad7606_scan, 3);
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static IIO_DEV_ATTR_IN_RAW(4, ad7606_scan, 4);
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static IIO_DEV_ATTR_IN_RAW(5, ad7606_scan, 5);
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static IIO_DEV_ATTR_IN_RAW(6, ad7606_scan, 6);
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static IIO_DEV_ATTR_IN_RAW(7, ad7606_scan, 7);
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static ssize_t ad7606_show_scale(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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/* Driver currently only support internal vref */
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struct iio_dev *dev_info = dev_get_drvdata(dev);
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struct ad7606_state *st = iio_dev_get_devdata(dev_info);
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unsigned int scale_uv = (st->range * 1000 * 2) >> st->chip_info->bits;
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return sprintf(buf, "%d.%03d\n", scale_uv / 1000, scale_uv % 1000);
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}
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static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad7606_show_scale, NULL, 0);
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static ssize_t ad7606_show_name(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 *dev_info = dev_get_drvdata(dev);
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struct ad7606_state *st = iio_dev_get_devdata(dev_info);
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return sprintf(buf, "%s\n", st->chip_info->name);
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}
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static IIO_DEVICE_ATTR(name, S_IRUGO, ad7606_show_name, NULL, 0);
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static ssize_t ad7606_show_range(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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@ -222,16 +199,6 @@ static IIO_DEVICE_ATTR(oversampling_ratio, S_IRUGO | S_IWUSR,
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static IIO_CONST_ATTR(oversampling_ratio_available, "0 2 4 8 16 32 64");
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static struct attribute *ad7606_attributes[] = {
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&iio_dev_attr_in0_raw.dev_attr.attr,
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&iio_dev_attr_in1_raw.dev_attr.attr,
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&iio_dev_attr_in2_raw.dev_attr.attr,
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&iio_dev_attr_in3_raw.dev_attr.attr,
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&iio_dev_attr_in4_raw.dev_attr.attr,
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&iio_dev_attr_in5_raw.dev_attr.attr,
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&iio_dev_attr_in6_raw.dev_attr.attr,
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&iio_dev_attr_in7_raw.dev_attr.attr,
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&iio_dev_attr_in_scale.dev_attr.attr,
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&iio_dev_attr_name.dev_attr.attr,
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&iio_dev_attr_range.dev_attr.attr,
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&iio_const_attr_range_available.dev_attr.attr,
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&iio_dev_attr_oversampling_ratio.dev_attr.attr,
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@ -248,15 +215,7 @@ static mode_t ad7606_attr_is_visible(struct kobject *kobj,
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mode_t mode = attr->mode;
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if (st->chip_info->num_channels <= 6 &&
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(attr == &iio_dev_attr_in7_raw.dev_attr.attr ||
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attr == &iio_dev_attr_in6_raw.dev_attr.attr))
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mode = 0;
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else if (st->chip_info->num_channels <= 4 &&
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(attr == &iio_dev_attr_in5_raw.dev_attr.attr ||
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attr == &iio_dev_attr_in4_raw.dev_attr.attr))
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mode = 0;
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else if (!st->have_os &&
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if (!st->have_os &&
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(attr == &iio_dev_attr_oversampling_ratio.dev_attr.attr ||
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attr ==
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&iio_const_attr_oversampling_ratio_available.dev_attr.attr))
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@ -274,29 +233,92 @@ static const struct attribute_group ad7606_attribute_group = {
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.is_visible = ad7606_attr_is_visible,
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};
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static struct iio_chan_spec ad7606_8_channels[] = {
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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0, 0, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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1, 1, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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2, 2, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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3, 3, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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4, 4, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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5, 5, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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6, 6, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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7, 7, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN_SOFT_TIMESTAMP(8),
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};
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static struct iio_chan_spec ad7606_6_channels[] = {
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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0, 0, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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1, 1, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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2, 2, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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3, 3, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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4, 4, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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5, 5, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN_SOFT_TIMESTAMP(6),
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};
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static struct iio_chan_spec ad7606_4_channels[] = {
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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0, 0, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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1, 1, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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2, 2, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
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(1 << IIO_CHAN_INFO_SCALE_SHARED),
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3, 3, IIO_ST('s', 16, 16, 0), 0),
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IIO_CHAN_SOFT_TIMESTAMP(4),
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};
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static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
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/*
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* More devices added in future
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*/
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[ID_AD7606_8] = {
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.name = "ad7606",
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.bits = 16,
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.sign = IIO_SCAN_EL_TYPE_SIGNED,
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.int_vref_mv = 2500,
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.channels = ad7606_8_channels,
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.num_channels = 8,
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},
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[ID_AD7606_6] = {
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.name = "ad7606-6",
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.bits = 16,
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.sign = IIO_SCAN_EL_TYPE_SIGNED,
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.int_vref_mv = 2500,
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.channels = ad7606_6_channels,
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.num_channels = 6,
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},
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[ID_AD7606_4] = {
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.name = "ad7606-4",
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.bits = 16,
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.sign = IIO_SCAN_EL_TYPE_SIGNED,
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.int_vref_mv = 2500,
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.channels = ad7606_4_channels,
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.num_channels = 4,
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},
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};
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@ -445,8 +467,6 @@ struct ad7606_state *ad7606_probe(struct device *dev, int irq,
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st->pdata = pdata;
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st->chip_info = &ad7606_chip_info_tbl[id];
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atomic_set(&st->protect_ring, 0);
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st->indio_dev = iio_allocate_device(0);
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if (st->indio_dev == NULL) {
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ret = -ENOMEM;
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@ -459,6 +479,9 @@ struct ad7606_state *ad7606_probe(struct device *dev, int irq,
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st->indio_dev->driver_module = THIS_MODULE;
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st->indio_dev->modes = INDIO_DIRECT_MODE;
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st->indio_dev->name = st->chip_info->name;
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st->indio_dev->channels = st->chip_info->channels;
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st->indio_dev->num_channels = st->chip_info->num_channels;
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st->indio_dev->read_raw = &ad7606_read_raw;
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init_waitqueue_head(&st->wq_data_avail);
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@ -483,7 +506,9 @@ struct ad7606_state *ad7606_probe(struct device *dev, int irq,
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if (ret)
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goto error_free_irq;
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ret = iio_ring_buffer_register(st->indio_dev->ring, 0);
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ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
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st->indio_dev->channels,
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st->indio_dev->num_channels);
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if (ret)
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goto error_cleanup_ring;
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@ -21,87 +21,6 @@
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#include "ad7606.h"
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static IIO_SCAN_EL_C(in0, 0, 0, NULL);
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static IIO_SCAN_EL_C(in1, 1, 0, NULL);
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static IIO_SCAN_EL_C(in2, 2, 0, NULL);
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static IIO_SCAN_EL_C(in3, 3, 0, NULL);
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static IIO_SCAN_EL_C(in4, 4, 0, NULL);
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static IIO_SCAN_EL_C(in5, 5, 0, NULL);
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static IIO_SCAN_EL_C(in6, 6, 0, NULL);
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static IIO_SCAN_EL_C(in7, 7, 0, NULL);
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static IIO_SCAN_EL_TIMESTAMP(8);
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static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64);
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static ssize_t ad7606_show_type(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_ring_buffer *ring = dev_get_drvdata(dev);
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struct iio_dev *indio_dev = ring->indio_dev;
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struct ad7606_state *st = indio_dev->dev_data;
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return sprintf(buf, "%c%d/%d\n", st->chip_info->sign,
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st->chip_info->bits, st->chip_info->bits);
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}
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static IIO_DEVICE_ATTR(in_type, S_IRUGO, ad7606_show_type, NULL, 0);
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static struct attribute *ad7606_scan_el_attrs[] = {
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&iio_scan_el_in0.dev_attr.attr,
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&iio_const_attr_in0_index.dev_attr.attr,
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&iio_scan_el_in1.dev_attr.attr,
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&iio_const_attr_in1_index.dev_attr.attr,
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&iio_scan_el_in2.dev_attr.attr,
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&iio_const_attr_in2_index.dev_attr.attr,
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&iio_scan_el_in3.dev_attr.attr,
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&iio_const_attr_in3_index.dev_attr.attr,
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&iio_scan_el_in4.dev_attr.attr,
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&iio_const_attr_in4_index.dev_attr.attr,
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&iio_scan_el_in5.dev_attr.attr,
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&iio_const_attr_in5_index.dev_attr.attr,
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&iio_scan_el_in6.dev_attr.attr,
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&iio_const_attr_in6_index.dev_attr.attr,
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&iio_scan_el_in7.dev_attr.attr,
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&iio_const_attr_in7_index.dev_attr.attr,
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&iio_const_attr_timestamp_index.dev_attr.attr,
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&iio_scan_el_timestamp.dev_attr.attr,
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&iio_const_attr_timestamp_type.dev_attr.attr,
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&iio_dev_attr_in_type.dev_attr.attr,
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NULL,
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};
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static mode_t ad7606_scan_el_attr_is_visible(struct kobject *kobj,
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struct attribute *attr, int n)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct iio_ring_buffer *ring = dev_get_drvdata(dev);
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struct iio_dev *indio_dev = ring->indio_dev;
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struct ad7606_state *st = indio_dev->dev_data;
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mode_t mode = attr->mode;
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if (st->chip_info->num_channels <= 6 &&
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(attr == &iio_scan_el_in7.dev_attr.attr ||
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attr == &iio_const_attr_in7_index.dev_attr.attr ||
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attr == &iio_scan_el_in6.dev_attr.attr ||
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attr == &iio_const_attr_in6_index.dev_attr.attr))
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mode = 0;
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else if (st->chip_info->num_channels <= 4 &&
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(attr == &iio_scan_el_in5.dev_attr.attr ||
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attr == &iio_const_attr_in5_index.dev_attr.attr ||
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attr == &iio_scan_el_in4.dev_attr.attr ||
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attr == &iio_const_attr_in4_index.dev_attr.attr))
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mode = 0;
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return mode;
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}
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static struct attribute_group ad7606_scan_el_group = {
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.name = "scan_elements",
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.attrs = ad7606_scan_el_attrs,
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.is_visible = ad7606_scan_el_attr_is_visible,
|
||||
};
|
||||
|
||||
int ad7606_scan_from_ring(struct ad7606_state *st, unsigned ch)
|
||||
{
|
||||
struct iio_ring_buffer *ring = st->indio_dev->ring;
|
||||
|
|
@ -139,7 +58,7 @@ static int ad7606_ring_preenable(struct iio_dev *indio_dev)
|
|||
size_t d_size;
|
||||
|
||||
d_size = st->chip_info->num_channels *
|
||||
st->chip_info->bits / 8;
|
||||
st->chip_info->channels[0].scan_type.storagebits / 8;
|
||||
|
||||
if (ring->scan_timestamp) {
|
||||
d_size += sizeof(s64);
|
||||
|
|
@ -157,14 +76,15 @@ static int ad7606_ring_preenable(struct iio_dev *indio_dev)
|
|||
}
|
||||
|
||||
/**
|
||||
* ad7606_trigger_handler_th() th of trigger launched polling to ring buffer
|
||||
* ad7606_trigger_handler_th() th/bh of trigger launched polling to ring buffer
|
||||
*
|
||||
**/
|
||||
static irqreturn_t ad7606_trigger_handler_th(int irq, void *p)
|
||||
static irqreturn_t ad7606_trigger_handler_th_bh(int irq, void *p)
|
||||
{
|
||||
struct iio_poll_func *pf = p;
|
||||
struct iio_dev *indio_dev = pf->private_data;
|
||||
struct ad7606_state *st = indio_dev->dev_data;
|
||||
|
||||
gpio_set_value(st->pdata->gpio_convst, 1);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
|
|
@ -190,10 +110,6 @@ static void ad7606_poll_bh_to_ring(struct work_struct *work_s)
|
|||
__u8 *buf;
|
||||
int ret;
|
||||
|
||||
/* Ensure only one copy of this function running at a time */
|
||||
if (atomic_inc_return(&st->protect_ring) > 1)
|
||||
return;
|
||||
|
||||
buf = kzalloc(st->d_size, GFP_KERNEL);
|
||||
if (buf == NULL)
|
||||
return;
|
||||
|
|
@ -231,8 +147,8 @@ static void ad7606_poll_bh_to_ring(struct work_struct *work_s)
|
|||
ring->access.store_to(&sw_ring->buf, buf, time_ns);
|
||||
done:
|
||||
gpio_set_value(st->pdata->gpio_convst, 0);
|
||||
iio_trigger_notify_done(indio_dev->trig);
|
||||
kfree(buf);
|
||||
atomic_dec(&st->protect_ring);
|
||||
}
|
||||
|
||||
int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
|
||||
|
|
@ -253,8 +169,10 @@ int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
|
|||
ret = -ENOMEM;
|
||||
goto error_deallocate_sw_rb;
|
||||
}
|
||||
|
||||
indio_dev->pollfunc->private_data = indio_dev;
|
||||
indio_dev->pollfunc->h = &ad7606_trigger_handler_th;
|
||||
indio_dev->pollfunc->h = &ad7606_trigger_handler_th_bh;
|
||||
indio_dev->pollfunc->thread = &ad7606_trigger_handler_th_bh;
|
||||
indio_dev->pollfunc->name =
|
||||
kasprintf(GFP_KERNEL, "%s_consumer%d", indio_dev->name,
|
||||
indio_dev->id);
|
||||
|
|
@ -267,7 +185,6 @@ int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
|
|||
indio_dev->ring->preenable = &ad7606_ring_preenable;
|
||||
indio_dev->ring->postenable = &iio_triggered_ring_postenable;
|
||||
indio_dev->ring->predisable = &iio_triggered_ring_predisable;
|
||||
indio_dev->ring->scan_el_attrs = &ad7606_scan_el_group;
|
||||
indio_dev->ring->scan_timestamp = true ;
|
||||
|
||||
INIT_WORK(&st->poll_work, &ad7606_poll_bh_to_ring);
|
||||
|
|
|
|||
Loading…
Reference in New Issue