+#define DEV_CAPS_AX_ANALOG (1 << DEV_CAPS_AX_ANALOG_POS)
+
+/* Protocol commands */
+#define CMD_GET_FW_VERSION 0xb0
+#define CMD_START 0xb1
+#define CMD_GET_REVID_VERSION 0xb2
+
+#define CMD_START_FLAGS_CLK_CTL2_POS 4
+#define CMD_START_FLAGS_WIDE_POS 5
+#define CMD_START_FLAGS_CLK_SRC_POS 6
+
+#define CMD_START_FLAGS_CLK_CTL2 (1 << CMD_START_FLAGS_CLK_CTL2_POS)
+#define CMD_START_FLAGS_SAMPLE_8BIT (0 << CMD_START_FLAGS_WIDE_POS)
+#define CMD_START_FLAGS_SAMPLE_16BIT (1 << CMD_START_FLAGS_WIDE_POS)
+
+#define CMD_START_FLAGS_CLK_30MHZ (0 << CMD_START_FLAGS_CLK_SRC_POS)
+#define CMD_START_FLAGS_CLK_48MHZ (1 << CMD_START_FLAGS_CLK_SRC_POS)