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129c549981
Add a new function to get an IIO backend by its index in the io-backends device tree property. This is useful for multi-channel devices that have multiple backends, where looking up by index is more straightforward than using named backends. Extract __devm_iio_backend_fwnode_get_by_index() from the existing __devm_iio_backend_fwnode_get(), taking the index directly as a parameter. The new public API devm_iio_backend_get_by_index() uses the index to find the backend reference in the io-backends property, avoiding the need for io-backend-names. Reviewed-by: David Lechner <dlechner@baylibre.com> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>