ASoC: codecs: wcd938x: add Multi Button Headset Control support
WCD938x has Multi Button Headset Control hardware to support Headset insertion, type detection, 8 headset buttons detection, Over Current detection and Impedence measurements. This patch adds support for this using wcd-mbhc apis. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20210716105918.7301-1-srinivas.kandagatla@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>
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