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staging:iio:hmc5843: Introduce helper functions to show/check list of int pairs

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Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Peter Meerwald 2013-09-19 20:35:00 +01:00 committed by Jonathan Cameron
parent 9728fe3f8f
commit dd28e48278
1 changed files with 34 additions and 22 deletions
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56
drivers/staging/iio/magnetometer/hmc5843.c
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@ -356,24 +356,42 @@ static IIO_DEVICE_ATTR(meas_conf,
hmc5843_set_measurement_configuration,
0);
static ssize_t hmc5843_show_int_plus_micros(char *buf,
const int (*vals)[2], int n)
{
size_t len = 0;
int i;
for (i = 0; i < n; i++)
len += scnprintf(buf + len, PAGE_SIZE - len,
"%d.%d ", vals[i][0], vals[i][1]);
/* replace trailing space by newline */
buf[len - 1] = '\n';
return len;
}
static int hmc5843_check_int_plus_micros(const int (*vals)[2], int n,
int val, int val2)
{
int i;
for (i = 0; i < n; i++) {
if (val == vals[i][0] && val2 == vals[i][1])
return i;
}
return -EINVAL;
}
static ssize_t hmc5843_show_samp_freq_avail(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct hmc5843_data *data = iio_priv(dev_to_iio_dev(dev));
ssize_t total_n = 0;
int i;
for (i = 0; i < HMC5843_RATE_NOT_USED; i++) {
ssize_t n = sprintf(buf, "%d.%d ",
data->variant->regval_to_samp_freq[i][0],
data->variant->regval_to_samp_freq[i][1]);
buf += n;
total_n += n;
}
/* replace trailing space by newline */
buf[-1] = '\n';
return total_n;
return hmc5843_show_int_plus_micros(buf,
data->variant->regval_to_samp_freq, HMC5843_RATE_NOT_USED);
}
static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(hmc5843_show_samp_freq_avail);
@ -389,15 +407,9 @@ static s32 hmc5843_set_rate(struct hmc5843_data *data, u8 rate)
static int hmc5843_check_samp_freq(struct hmc5843_data *data,
int val, int val2)
{
int i;
for (i = 0; i < HMC5843_RATE_NOT_USED; i++) {
if (val == data->variant->regval_to_samp_freq[i][0] &&
val2 == data->variant->regval_to_samp_freq[i][1])
return i;
}
return -EINVAL;
return hmc5843_check_int_plus_micros(
data->variant->regval_to_samp_freq, HMC5843_RATE_NOT_USED,
val, val2);
}
static ssize_t hmc5843_show_range_gain(struct device *dev,