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iio: adc: ad7791: Use sysfs_match_string() helper

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Use sysfs_match_string() helper instead of open coded variant.

Cc: Lars-Peter Clausen <[email protected]>
Cc: Michael Hennerich <[email protected]>
Cc: Jonathan Cameron <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
This commit is contained in:
Andy Shevchenko 2017-06-09 15:08:10 +03:00 • committed by Jonathan Cameron
commit 405570b4a5
1 changed files with 3 additions and 5 deletions
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8
drivers/iio/adc/ad7791.c
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@ -272,11 +272,9 @@ static ssize_t ad7791_write_frequency(struct device *dev,
struct ad7791_state *st = iio_priv(indio_dev);
int i, ret;
for (i = 0; i < ARRAY_SIZE(ad7791_sample_freq_avail); i++)
if (sysfs_streq(ad7791_sample_freq_avail[i], buf))
break;
if (i == ARRAY_SIZE(ad7791_sample_freq_avail))
return -EINVAL;
i = sysfs_match_string(ad7791_sample_freq_avail, buf);
if (i < 0)
return i;
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)