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diff --git a/src/drivers/ao_ads124s0x.h b/src/drivers/ao_ads124s0x.h
new file mode 100644
index 00000000..42bdc45e
--- /dev/null
+++ b/src/drivers/ao_ads124s0x.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright © 2019 Bdale Garbee <bdale@gag.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _AO_ADS124S0X_H_
+#define _AO_ADS124S0X_H_
+
+/* control commands */
+#define AO_ADS124S0X_NOP		0x00
+#define AO_ADS124S0X_WAKEUP		0x02
+#define AO_ADS124S0X_POWERDOWN		0x04
+#define AO_ADS124S0X_RESET		0x06
+#define AO_ADS124S0X_START		0x08
+#define AO_ADS124S0X_STOP		0x0a
+
+/* calibration commands */
+#define AO_ADS124S0X_SYOCAL		0x16
+#define AO_ADS124S0X_SYGCAL		0x17
+#define AO_ADS124S0X_SFOCAL		0x19
+
+/* data read command */
+#define AO_ADS124S0X_RDATA		0x12
+
+/* register read and write commands */
+#define AO_ADS124S0X_RREG		0x20
+#define AO_ADS124S0X_WREG		0x40
+
+/* configuration register map */
+#define AO_ADS124S0X_ID			0x00
+#define AO_ADS124S0X_ID_ADS124S08		0x00
+#define AO_ADS124S0X_ID_ADS124S06		0x01
+#define AO_ADS124S0X_STATUS		0x01
+#define AO_ADS124S0X_INPMUX		0x02
+#define AO_ADS124S0X_PGA		0x03
+#define AO_ADS124S0X_DATARATE		0x04
+#define AO_ADS124S0X_REF		0x05
+#define AO_ADS124S0X_IDACMAG		0x06
+#define AO_ADS124S0X_IDACMUX		0x07
+#define AO_ADS124S0X_VBIAS		0x08
+#define AO_ADS124S0X_SYS		0x09
+#define AO_ADS124S0X_OFCAL0		0x0a
+#define AO_ADS124S0X_OFCAL1		0x0b
+#define AO_ADS124S0X_OFCAL2		0x0c
+#define AO_ADS124S0X_FSCAL0		0x0d
+#define AO_ADS124S0X_FSCAL1		0x0e
+#define AO_ADS124S0X_FSCAL2		0x0f
+#define AO_ADS124S0X_GPIODAT		0x10
+#define AO_ADS124S0X_GPIOCON		0x11
+
+struct ao_ads124s0x_sample {
+	int32_t	ain0;
+	int32_t	ain1;
+	int32_t	ain2;
+	int32_t	ain3;
+};
+
+extern struct ao_ads124s0x_sample	ao_ads124s0x_current;
+
+void
+ao_ads124s0x_init(void);
+
+#endif /* _AO_ADS124S0X_H_ */