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Some amplifiers based on analog switches and op-amps can be present in the audio path and can be driven by GPIOs in order to control their gain value, their mute and/or bypass functions. Those components needs to be viewed as audio components in order to be fully integrated in the audio path. gpio-audio-amp allows to consider these GPIO driven amplifiers as auxiliary audio devices. Signed-off-by: Herve Codina <herve.codina@bootlin.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20260513081702.317117-3-herve.codina@bootlin.com Signed-off-by: Mark Brown <broonie@kernel.org>