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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>
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49b81a3c74
commit
67eedba39e
2 changed files with 14 additions and 6 deletions
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@ -295,26 +295,33 @@ static ssize_t iio_read_channel_info(struct device *dev,
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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int val, val2;
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bool scale_db = false;
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int ret = indio_dev->info->read_raw(indio_dev, this_attr->c,
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&val, &val2, this_attr->address);
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if (ret < 0)
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return ret;
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if (ret == IIO_VAL_INT)
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switch (ret) {
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case IIO_VAL_INT:
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return sprintf(buf, "%d\n", val);
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else if (ret == IIO_VAL_INT_PLUS_MICRO) {
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case IIO_VAL_INT_PLUS_MICRO_DB:
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scale_db = true;
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case IIO_VAL_INT_PLUS_MICRO:
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if (val2 < 0)
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return sprintf(buf, "-%d.%06u\n", val, -val2);
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return sprintf(buf, "-%d.%06u%s\n", val, -val2,
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scale_db ? " dB" : "");
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else
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return sprintf(buf, "%d.%06u\n", val, val2);
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} else if (ret == IIO_VAL_INT_PLUS_NANO) {
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return sprintf(buf, "%d.%06u%s\n", val, val2,
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scale_db ? " dB" : "");
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case IIO_VAL_INT_PLUS_NANO:
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if (val2 < 0)
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return sprintf(buf, "-%d.%09u\n", val, -val2);
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else
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return sprintf(buf, "%d.%09u\n", val, val2);
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} else
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default:
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return 0;
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}
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}
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static ssize_t iio_write_channel_info(struct device *dev,
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@ -50,5 +50,6 @@ enum iio_modifier {
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#define IIO_VAL_INT 1
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#define IIO_VAL_INT_PLUS_MICRO 2
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#define IIO_VAL_INT_PLUS_NANO 3
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#define IIO_VAL_INT_PLUS_MICRO_DB 4
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#endif /* _IIO_TYPES_H_ */
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