From: Sean Anderson Date: Thu, 20 Jun 2024 21:20:05 +0000 (-0400) Subject: hwmon: iio: Use iio_read_channel_processed_scale for IIO_POWER X-Git-Tag: io_uring-6.11-20240722~120^2~33 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=52c1e818d66bfed276bd371f9e7947be4055af87;p=linux-block.git hwmon: iio: Use iio_read_channel_processed_scale for IIO_POWER 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 Link: https://lore.kernel.org/r/20240620212005.821805-1-sean.anderson@linux.dev Signed-off-by: Guenter Roeck --- diff --git a/drivers/hwmon/iio_hwmon.c b/drivers/hwmon/iio_hwmon.c index 4c8a80847891..fab32e1e15f2 100644 --- a/drivers/hwmon/iio_hwmon.c +++ b/drivers/hwmon/iio_hwmon.c @@ -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); }