IIO: How to differentiate between input and output channels with the same name

Question

Hello 
 I am using the IIO device driver for the AD9375. I am using version 2022_R2 of the meta-adi layer for Petalinux. 
 
 I have hopefully a simple question. 
 I am trying to select a specific IIO channel on the AD9375. It has two output channels named voltage0 and voltage1 and three input channels named voltage0, voltage1 and voltage2. 
 To select a channel I have been using iio_device_find_channel() which uses the name ("voltage0", "voltage1", etc). 
 How do I choose whether I want to find / select the input channel or the output channel? I assume there must be a function but I am unable to find it. 
 
 Thank you. 
 Gavin

gavint · Accepted Answer

Sorry, my bad. There is a parameter in iio_device_find_channel which specifies whether it is an output or an input: 
 /** @brief Try to find a channel structure by its name of ID * @param dev A pointer to an iio_device structure * @param name A NULL-terminated string corresponding to the name or the ID of * the channel to search for * @param output True if the searched channel is output, False otherwise * @return On success, a pointer to an iio_channel structure * @return If the name or ID does not correspond to any known channel of the * given device, NULL is returned */ __api __check_ret __pure struct iio_channel * iio_device_find_channel( const struct iio_device *dev, const char *name, bool output);)

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IIO: How to differentiate between input and output channels with the same name