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[2/3] iio: ti_am335x_adc: optimize memory usage

Message ID 1379571876-12420-3-git-send-email-zubair.lutfullah@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Zubair Lutfullah Sept. 19, 2013, 6:24 a.m. UTC 
12 bit ADC data is stored in 32 bits of storage.
Change from u32 to u16 to reduce wasted memory.

Signed-off-by: Zubair Lutfullah <zubair.lutfullah@gmail.com>
---
 drivers/iio/adc/ti_am335x_adc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index a952538..ebe93eb 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -122,7 +122,7 @@  static int tiadc_channel_init(struct iio_dev *indio_dev, int channels)
 		chan->datasheet_name = chan_name_ain[chan->channel];
 		chan->scan_type.sign = 'u';
 		chan->scan_type.realbits = 12;
-		chan->scan_type.storagebits = 32;
+		chan->scan_type.storagebits = 16;
 	}
 
 	indio_dev->channels = chan_array;
@@ -186,7 +186,7 @@  static int tiadc_read_raw(struct iio_dev *indio_dev,
 		if (stepid == map_val) {
 			read = read & FIFOREAD_DATA_MASK;
 			found = true;
-			*val = read;
+			*val = (u16) read;
 		}
 	}