+#define VT1724_REVO_CS2 0x40 /* surround AKM4355 CS (revo71) */
+#define VT1724_REVO_I2C_DATA 0x40 /* I2C: PT 2258 SDA (on revo51) */
+#define VT1724_REVO_I2C_CLOCK 0x80 /* I2C: PT 2258 SCL (on revo51) */
+#define VT1724_REVO_CS3 0x80 /* AK4114 for AP192 */