patch "iio: adc: xilinx: Fix VREFN sign" added to staging-linus

This is a note to let you know that I've just added the patch titled

iio: adc: xilinx: Fix VREFN sign

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Thomas Betker <[email protected]>
Date: Wed, 15 Apr 2015 21:11:50 +0200
Subject: iio: adc: xilinx: Fix VREFN sign

The VREFN channel is bipolar, not unipolar. Small negative values do occur (e.g., -1mV), and unsigned conversion maps them incorrectly to large positive values (about +1V), so fix this.

---
 drivers/iio/adc/xilinx-xadc-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 6fa629b3c168..ce93bd8e3f68 100644
@@ -997,7 +997,7 @@ static const struct iio_event_spec xadc_voltage_events[] = {
 	.num_event_specs = (_alarm) ? ARRAY_SIZE(xadc_voltage_events) : 0, \
 	.scan_index = (_scan_index), \
 	.scan_type = { \
-		.sign = 'u', \
+		.sign = ((_addr) == XADC_REG_VREFN) ? 's' : 'u', \
 		.realbits = 12, \
 		.storagebits = 16, \
 		.shift = 4, \

2.4.0