diff --git a/include/dt-bindings/sound/tlv320adc3xxx.h b/include/dt-bindings/sound/tlv320adc3xxx.h
new file mode 100644
index 0000000..ec98843
--- /dev/null
+++ b/include/dt-bindings/sound/tlv320adc3xxx.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Devicetree bindings definitions for tlv320adc3xxx driver.
+ *
+ * Copyright (C) 2021 Axis Communications AB
+ */
+#ifndef __DT_TLV320ADC3XXX_H
+#define __DT_TLV320ADC3XXX_H
+
+#define ADC3XXX_GPIO_DISABLED		0 /* I/O buffers powered down */
+#define ADC3XXX_GPIO_INPUT		1 /* Various non-GPIO inputs */
+#define ADC3XXX_GPIO_GPI		2 /* General purpose input */
+#define ADC3XXX_GPIO_GPO		3 /* General purpose output */
+#define ADC3XXX_GPIO_CLKOUT		4 /* Source set in reg. CLKOUT_MUX */
+#define ADC3XXX_GPIO_INT1		5 /* INT1 output */
+#define ADC3XXX_GPIO_INT2		6 /* INT2 output */
+/* value 7 is reserved */
+#define ADC3XXX_GPIO_SECONDARY_BCLK	8 /* Codec interface secondary BCLK */
+#define ADC3XXX_GPIO_SECONDARY_WCLK	9 /* Codec interface secondary WCLK */
+#define ADC3XXX_GPIO_ADC_MOD_CLK	10 /* Clock output for digital mics */
+/* values 11-15 reserved */
+
+#define ADC3XXX_MICBIAS_OFF		0 /* Micbias pin powered off */
+#define ADC3XXX_MICBIAS_2_0V		1 /* Micbias pin set to 2.0V */
+#define ADC3XXX_MICBIAS_2_5V		2 /* Micbias pin set to 2.5V */
+#define ADC3XXX_MICBIAS_AVDD		3 /* Use AVDD voltage for micbias pin */
+
+#endif /* __DT_TLV320ADC3XXX_H */