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hwmon: iio: Use iio_read_channel_processed_scale for IIO_POWER

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Instead of rescaling power channels after the fact, use the dedicated
scaling API. This should reduce any inaccuracies resulting from the
scaling.

Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Link: https://lore.kernel.org/r/20240620212005.821805-1-sean.anderson@linux.dev
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Sean Anderson 2024-06-20 17:20:05 -04:00 committed by Guenter Roeck
parent 1226a1b2e5
commit 52c1e818d6
1 changed files with 6 additions and 5 deletions
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11
drivers/hwmon/iio_hwmon.c
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@ -49,16 +49,17 @@ static ssize_t iio_hwmon_read_val(struct device *dev,
struct iio_channel *chan = &state->channels[sattr->index];
enum iio_chan_type type;
ret = iio_read_channel_processed(chan, &result);
if (ret < 0)
return ret;
ret = iio_get_channel_type(chan, &type);
if (ret < 0)
return ret;
if (type == IIO_POWER)
result *= 1000; /* mili-Watts to micro-Watts conversion */
/* mili-Watts to micro-Watts conversion */
ret = iio_read_channel_processed_scale(chan, &result, 1000);
else
ret = iio_read_channel_processed(chan, &result);
if (ret < 0)
return ret;
return sprintf(buf, "%d\n", result);
}