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staging: iio: tsl2x7x: add range checking to tsl2x7x_write_raw

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The CALIBBIAS and INT_TIME masks in tsl2x7x_write_raw did not have any
range checking in place so this patch adds the appropriate range
checking. The defines TSL2X7X_ALS_GAIN_TRIM_{MIN,MAX} are also
introduced by this patch.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Brian Masney 2018-05-10 20:12:21 -04:00 committed by Jonathan Cameron
parent 9861d2daaf
commit da18e89062
1 changed files with 12 additions and 1 deletions
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13
drivers/staging/iio/light/tsl2x7x.c
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@ -103,6 +103,9 @@
#define TSL2X7X_CNTL_PROXPON_ENBL 0x0F
#define TSL2X7X_CNTL_INTPROXPON_ENBL 0x2F
#define TSL2X7X_ALS_GAIN_TRIM_MIN 250
#define TSL2X7X_ALS_GAIN_TRIM_MAX 4000
/* TAOS txx2x7x Device family members */
enum {
tsl2571,
@ -581,7 +584,7 @@ static int tsl2x7x_als_calibrate(struct iio_dev *indio_dev)
ret = (chip->settings.als_cal_target * chip->settings.als_gain_trim) /
lux_val;
if (ret < 250 || ret > 4000)
if (ret < TSL2X7X_ALS_GAIN_TRIM_MIN || ret > TSL2X7X_ALS_GAIN_TRIM_MAX)
return -ERANGE;
chip->settings.als_gain_trim = ret;
@ -1209,9 +1212,17 @@ static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
}
break;
case IIO_CHAN_INFO_CALIBBIAS:
if (val < TSL2X7X_ALS_GAIN_TRIM_MIN ||
val > TSL2X7X_ALS_GAIN_TRIM_MAX)
return -EINVAL;
chip->settings.als_gain_trim = val;
break;
case IIO_CHAN_INFO_INT_TIME:
if (val != 0 || val2 < tsl2x7x_int_time_avail[chip->id][1] ||
val2 > tsl2x7x_int_time_avail[chip->id][5])
return -EINVAL;
chip->settings.als_time = 256 -
(val2 / tsl2x7x_int_time_avail[chip->id][3]);
break;