iio: pressure: mprls0025pa: fix scan_type struct

[ Upstream commit 8a228e0 ]

Fix the scan_type sign and realbits assignment.

The pressure is a 24bit unsigned int between output_min and output_max.

 transfer function A: 10%   to 90%   of 2^24
 transfer function B:  2.5% to 22.5% of 2^24
 transfer function C: 20%   to 80%   of 2^24
[MPR_FUNCTION_A] = { .output_min = 1677722, .output_max = 15099494 }
[MPR_FUNCTION_B] = { .output_min =  419430, .output_max =  3774874 }
[MPR_FUNCTION_C] = { .output_min = 3355443, .output_max = 13421773 }

Fixes: 713337d ("iio: pressure: Honeywell mprls0025pa pressure sensor")
Signed-off-by: Petre Rodan <petre.rodan@subdimension.ro>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: rodan

drivers/iio/pressure/mprls0025pa.c

@@ -132,8 +132,8 @@ static const struct iio_chan_spec mpr_channels[] = {
 					BIT(IIO_CHAN_INFO_OFFSET),
 		.scan_index = 0,
 		.scan_type = {
-			.sign = 's',
-			.realbits = 32,
+			.sign = 'u',
+			.realbits = 24,
 			.storagebits = 32,
 			.endianness = IIO_CPU,
 		},