iio:bma180: Implement _available sysfs attribute dynamically
makes it easier to add more chip variants and removes redundancy: scales and frequencies are now stated just once Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Cc: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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@ -85,12 +85,6 @@ struct bma180_part_info {
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#define BMA180_DEF_BW 20
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#define BMA180_DEF_SCALE 2452
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/* Available values for sysfs */
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#define BMA180_FLP_FREQ_AVAILABLE \
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"10 20 40 75 150 300"
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#define BMA180_SCALE_AVAILABLE \
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"0.001275 0.001863 0.002452 0.003727 0.004903 0.009709 0.019417"
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struct bma180_data {
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struct i2c_client *client;
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struct iio_trigger *trig;
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@ -349,13 +343,51 @@ static void bma180_chip_disable(struct bma180_data *data)
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dev_err(&data->client->dev, "failed to disable the chip\n");
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}
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static IIO_CONST_ATTR(in_accel_filter_low_pass_3db_frequency_available,
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BMA180_FLP_FREQ_AVAILABLE);
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static IIO_CONST_ATTR(in_accel_scale_available, BMA180_SCALE_AVAILABLE);
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static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned n,
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bool micros)
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{
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size_t len = 0;
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int i;
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for (i = 0; i < n; i++) {
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if (!vals[i])
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continue;
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len += scnprintf(buf + len, PAGE_SIZE - len,
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micros ? "0.%06d " : "%d ", vals[i]);
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}
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buf[len - 1] = '\n';
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return len;
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}
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static ssize_t bma180_show_filter_freq_avail(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
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return bma180_show_avail(buf, data->part_info->bw_table,
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data->part_info->num_bw, false);
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}
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static ssize_t bma180_show_scale_avail(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
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return bma180_show_avail(buf, data->part_info->scale_table,
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data->part_info->num_scales, true);
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}
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static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
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S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
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static IIO_DEVICE_ATTR(in_accel_scale_available,
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S_IRUGO, bma180_show_scale_avail, NULL, 0);
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static struct attribute *bma180_attributes[] = {
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&iio_const_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.attr,
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&iio_const_attr_in_accel_scale_available.dev_attr.attr,
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&iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
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dev_attr.attr,
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&iio_dev_attr_in_accel_scale_available.dev_attr.attr,
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NULL,
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};
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