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iio: ti_am335x_adc: optimize memory usage

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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>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Zubair Lutfullah 2013-09-19 07:24:00 +01:00 committed by Jonathan Cameron
parent baee539915
commit 0f6fc7d56f
1 changed files with 2 additions and 2 deletions
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4
drivers/iio/adc/ti_am335x_adc.c
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@ -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;
}
}