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iio: light: al3010: fix incorrect scale for the highest gain range

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al3010_scales[] encodes the highest gain range as {0, 1187200}.
For IIO_VAL_INT_PLUS_MICRO, the fractional part must be less than
1000000, so the scale 1.1872 should instead be represented as
{ 1, 187200 }.

Since write_raw() compares the value from userspace against this
table, writing the advertised 1.1872 scale never matches the malformed
entry and returns -EINVAL. As a result, the highest gain range cannot
be selected. Reading the scale in that state also reports the malformed
value.

Fixes: c36b5195ab ("iio: light: add Dyna-Image AL3010 driver")
Signed-off-by: Vidhu Sarwal <vidhu.linux@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Vidhu Sarwal 2026-07-04 17:22:45 +05:30 committed by Jonathan Cameron
parent a9f41809bf
commit aa411adc6c
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/light/al3010.c
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@ -42,7 +42,7 @@ enum al3xxxx_range {
};
static const int al3010_scales[][2] = {
{0, 1187200}, {0, 296800}, {0, 74200}, {0, 18600}
{ 1, 187200 }, { 0, 296800 }, { 0, 74200 }, { 0, 18600 },
};
static const struct regmap_config al3010_regmap_config = {