ASoC: nau8821: Add slew rate controls.

The patch supports DMIC clock slew rate controls.

Signed-off-by: Seven Lee <wtli@nuvoton.com>
Link: https://lore.kernel.org/r/20231107035230.1241683-3-wtli@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: nau8821: Improve AMIC recording performance.

Since the hardware may be designed as a single-ended input, the headset mic
record only supports single-ended input on the left side. This patch
will enhance microphone recording performance for single-end.

Signed-off-by: Seven Lee <wtli@nuvoton.com>
Link: https://lore.kernel.org/r/20230823071244.1861487-2-wtli@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: nau8821: Implement DRC controls

This patch is support dynamic range compression controls.

Signed-off-by: Seven Lee <wtli@nuvoton.com>
Signed-off-by: Seven Lee <scott6986@gmail.com>
Link: https://lore.kernel.org/r/20230217092523.357142-1-wtli@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: nau8821: Add headset button detection

This patch adds the function of headphone button detection,
Button detection will be enabled if the device tree
has a key_enable property.

Signed-off-by: Seven Lee <wtli@nuvoton.com>
Link: https://lore.kernel.org/r/20220627032959.3442064-1-wtli@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>

ASoC: nau8821: new driver

The driver is for codec NAU88L21 of Nuvoton Technology Corporation.
The NAU88L21 is an ultra-low power high performance audio codec that
supports both analog and digital audio functions.

Signed-off-by: Seven Lee <wtli@nuvoton.com>
Link: https://lore.kernel.org/r/20211001103108.3297848-1-wtli@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>