ASoC: rockchip: add support for pdm controller
The Pulse Density Modulation Interface Controller (PDMC) is a PDM interface controller and decoder that support PDM format. It integrates a clock generator driving the PDM microphone and embeds filters which decimate the incoming bit stream to obtain most common audio rates. Signed-off-by:Sugar Zhang <sugar.zhang@rock-chips.com> Signed-off-by:
Mark Brown <broonie@kernel.org>
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