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[ Upstream commitb73f08bb7f] When reading in_voltage_scale we can get something like: root@analog:/sys/bus/iio/devices/iio:device2# cat in_voltage_scale 0.038146 However, when reading the available options: root@analog:/sys/bus/iio/devices/iio:device2# cat in_voltage_scale_available 2000.000000 2100.000006 2200.000007 2300.000008 2400.000009 2500.000010 which does not make sense. Moreover, when trying to set a new scale we get an error because there's no call to __ad9467_get_scale() to give us values as given when reading in_voltage_scale. Fix it by computing the available scales during probe and properly pass the list when .read_available() is called. While at it, change to use .read_available() from iio_info. Also note that to properly fix this, adi-axi-adc.c has to be changed accordingly. Fixes:ad67971202("iio: adc: ad9467: add support AD9467 ADC") Signed-off-by: Nuno Sa <nuno.sa@analog.com> Reviewed-by: David Lechner <dlechner@baylibre.com> Link: https://lore.kernel.org/r/20231207-iio-backend-prep-v2-4-a4a33bc4d70e@analog.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Sasha Levin <sashal@kernel.org>