• Akinobu Mita's avatar
    iio: adc: ti-ads1015: fix incorrect data rate setting update · 1d7fadc5
    Akinobu Mita authored
    commit 0d106b74 upstream.
    
    The ti-ads1015 driver has eight iio voltage channels and each iio channel
    can hold own sampling frequency information.
    
    The ADS1015 device only have a single config register which contains an
    input multiplexer selection, PGA and data rate settings.  So the driver
    should load the correct settings when the input multiplexer selection is
    changed.
    
    However, regardless of which channlel is currently selected, changing any
    iio channel's sampling frequency information immediately overwrites the
    current data rate setting in the config register.
    
    It breaks the current data rate setting if the different channel's sampling
    frequency information is changed because the data rate setting is not
    reloaded when the input multiplexer is switched.
    
    This removes the unexpected config register update and correctly load the
    data rate setting before getting adc result.
    
    Cc: Daniel Baluta <daniel.baluta@gmail.com>
    Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
    Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    1d7fadc5
ti-ads1015.c 17.7 KB