iio: Convert IIO_CHAN_SOFT_TIMESTAMP() to be compound literal

Currently IIO_CHAN_SOFT_TIMESTAMP() can only be used to fill the static
data.  In some cases it would be convenient to use it as right value in
the assignment operation. But it can't be done as is, because compiler
has no clue about the data layout. Converting it to be a compound literal
allows the above mentioned usage.

While at it, tidy up the indentation.

We also have to change existing uses of compound literal at the same
time to avoid compiler errors.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

Author: andy-shev

drivers/iio/adc/ad7606.c

@@ -1475,7 +1475,7 @@ static int ad7606_probe_channels(struct iio_dev *indio_dev)
 	}
 
 	if (slow_bus)
-		channels[i] = (struct iio_chan_spec)IIO_CHAN_SOFT_TIMESTAMP(i);
+		channels[i] = IIO_CHAN_SOFT_TIMESTAMP(i);
 
 	indio_dev->channels = channels;
 

drivers/iio/adc/max11410.c

@@ -804,7 +804,7 @@ static int max11410_parse_channels(struct max11410_state *st,
 		chan_idx++;
 	}
 
-	channels[chan_idx] = (struct iio_chan_spec)IIO_CHAN_SOFT_TIMESTAMP(chan_idx);
+	channels[chan_idx] = IIO_CHAN_SOFT_TIMESTAMP(chan_idx);
 
 	indio_dev->num_channels = chan_idx + 1;
 	indio_dev->channels = channels;

include/linux/iio/iio.h

@@ -353,15 +353,15 @@ static inline bool iio_channel_has_available(const struct iio_chan_spec *chan,
 		(chan->info_mask_shared_by_all_available & BIT(type));
 }
 
-#define IIO_CHAN_SOFT_TIMESTAMP(_si) {					\
+#define IIO_CHAN_SOFT_TIMESTAMP(_si) (struct iio_chan_spec) {		\
 	.type = IIO_TIMESTAMP,						\
 	.channel = -1,							\
 	.scan_index = _si,						\
 	.scan_type = {							\
 		.sign = 's',						\
-		.realbits = 64,					\
+		.realbits = 64,						\
 		.storagebits = 64,					\
-		},							\
+	},								\
 }
 
 s64 iio_get_time_ns(const struct iio_dev *indio_dev);