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Staging: iio: fix endian conversion in ad7298_scan_direct() 

"tmp" is used to store the output from cpu_to_be16() so it should be
a __be16 bit type.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dan Carpenter 2011-11-22 10:39:15 +03:00 committed by Greg Kroah-Hartman
parent 5ae8f44090
commit c1a752883d
1 changed files with 7 additions and 6 deletions
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13
drivers/staging/iio/adc/ad7298_core.c
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@ -69,27 +69,28 @@ static int ad7298_scan_direct(struct ad7298_state *st, unsigned ch)
static int ad7298_scan_temp(struct ad7298_state *st, int *val)
{
int tmp, ret;
__be16 buf;
tmp = cpu_to_be16(AD7298_WRITE | AD7298_TSENSE |
buf = cpu_to_be16(AD7298_WRITE | AD7298_TSENSE |
AD7298_TAVG | st->ext_ref);
ret = spi_write(st->spi, (u8 *)&tmp, 2);
ret = spi_write(st->spi, (u8 *)&buf, 2);
if (ret)
return ret;
tmp = 0;
buf = cpu_to_be16(0);
ret = spi_write(st->spi, (u8 *)&tmp, 2);
ret = spi_write(st->spi, (u8 *)&buf, 2);
if (ret)
return ret;
usleep_range(101, 1000); /* sleep > 100us */
ret = spi_read(st->spi, (u8 *)&tmp, 2);
ret = spi_read(st->spi, (u8 *)&buf, 2);
if (ret)
return ret;
tmp = be16_to_cpu(tmp) & RES_MASK(AD7298_BITS);
tmp = be16_to_cpu(buf) & RES_MASK(AD7298_BITS);
/*
* One LSB of the ADC corresponds to 0.25 deg C.