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Subject[PATCH 2/3] iio: ti_am335x_adc: optimize memory usage
Date
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(-)

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;
}
}

--
1.7.9.5


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