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Commit 67eedba3 authored by Michael Hennerich's avatar Michael Hennerich Committed by Greg Kroah-Hartman
Browse files

iio: core: introduce dB scle: IIO_VAL_INT_PLUS_MICRO_DB 



Signed-off-by: default avatarMichael Hennerich <michael.hennerich@analog.com>
Acked-by: default avatarJonathan Cameron <jic23@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 49b81a3c

drivers/iio/industrialio-core.c

+13 −6
Original line number Diff line number Diff line
@@ -295,27 +295,34 @@ static ssize_t iio_read_channel_info(struct device *dev, 
	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,

				      struct device_attribute *attr,

include/linux/iio/types.h

+1 −0
Original line number Diff line number Diff line
@@ -50,5 +50,6 @@ enum iio_modifier { 
#define IIO_VAL_INT 1

#define IIO_VAL_INT_PLUS_MICRO 2

#define IIO_VAL_INT_PLUS_NANO 3

#define IIO_VAL_INT_PLUS_MICRO_DB 4



#endif /* _IIO_TYPES_H_ */