iio: core: introduce dB scle: IIO_VAL_INT_PLUS_MICRO_DB
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index b39a587..425cd4c 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -295,26 +295,33 @@
struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
int val, val2;
+ bool scale_db = false;
int ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
&val, &val2, this_attr->address);
if (ret < 0)
return ret;
- if (ret == IIO_VAL_INT)
+ switch (ret) {
+ case IIO_VAL_INT:
return sprintf(buf, "%d\n", val);
- else if (ret == IIO_VAL_INT_PLUS_MICRO) {
+ case IIO_VAL_INT_PLUS_MICRO_DB:
+ scale_db = true;
+ case IIO_VAL_INT_PLUS_MICRO:
if (val2 < 0)
- return sprintf(buf, "-%d.%06u\n", val, -val2);
+ return sprintf(buf, "-%d.%06u%s\n", val, -val2,
+ scale_db ? " dB" : "");
else
- return sprintf(buf, "%d.%06u\n", val, val2);
- } else if (ret == IIO_VAL_INT_PLUS_NANO) {
+ return sprintf(buf, "%d.%06u%s\n", val, val2,
+ scale_db ? " dB" : "");
+ case IIO_VAL_INT_PLUS_NANO:
if (val2 < 0)
return sprintf(buf, "-%d.%09u\n", val, -val2);
else
return sprintf(buf, "%d.%09u\n", val, val2);
- } else
+ default:
return 0;
+ }
}
static ssize_t iio_write_channel_info(struct device *dev,