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>
diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
index f4d2804..a543cff 100644
--- a/drivers/iio/accel/bma180.c
+++ b/drivers/iio/accel/bma180.c
@@ -85,12 +85,6 @@
#define BMA180_DEF_BW 20
#define BMA180_DEF_SCALE 2452
-/* Available values for sysfs */
-#define BMA180_FLP_FREQ_AVAILABLE \
- "10 20 40 75 150 300"
-#define BMA180_SCALE_AVAILABLE \
- "0.001275 0.001863 0.002452 0.003727 0.004903 0.009709 0.019417"
-
struct bma180_data {
struct i2c_client *client;
struct iio_trigger *trig;
@@ -349,13 +343,51 @@
dev_err(&data->client->dev, "failed to disable the chip\n");
}
-static IIO_CONST_ATTR(in_accel_filter_low_pass_3db_frequency_available,
- BMA180_FLP_FREQ_AVAILABLE);
-static IIO_CONST_ATTR(in_accel_scale_available, BMA180_SCALE_AVAILABLE);
+static ssize_t bma180_show_avail(char *buf, const int *vals, unsigned n,
+ bool micros)
+{
+ size_t len = 0;
+ int i;
+
+ for (i = 0; i < n; i++) {
+ if (!vals[i])
+ continue;
+ len += scnprintf(buf + len, PAGE_SIZE - len,
+ micros ? "0.%06d " : "%d ", vals[i]);
+ }
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t bma180_show_filter_freq_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
+
+ return bma180_show_avail(buf, data->part_info->bw_table,
+ data->part_info->num_bw, false);
+}
+
+static ssize_t bma180_show_scale_avail(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct bma180_data *data = iio_priv(dev_to_iio_dev(dev));
+
+ return bma180_show_avail(buf, data->part_info->scale_table,
+ data->part_info->num_scales, true);
+}
+
+static IIO_DEVICE_ATTR(in_accel_filter_low_pass_3db_frequency_available,
+ S_IRUGO, bma180_show_filter_freq_avail, NULL, 0);
+
+static IIO_DEVICE_ATTR(in_accel_scale_available,
+ S_IRUGO, bma180_show_scale_avail, NULL, 0);
static struct attribute *bma180_attributes[] = {
- &iio_const_attr_in_accel_filter_low_pass_3db_frequency_available.dev_attr.attr,
- &iio_const_attr_in_accel_scale_available.dev_attr.attr,
+ &iio_dev_attr_in_accel_filter_low_pass_3db_frequency_available.
+ dev_attr.attr,
+ &iio_dev_attr_in_accel_scale_available.dev_attr.attr,
NULL,
};
