+/* In case of 4 channel mode, the RX1 L/R for playback and the TX2 L/R for
+ * capture has to be enabled/disabled. */
+static void twl4030_tdm_enable(struct snd_soc_codec *codec, int direction,
+ int enable)
+{
+ u8 reg, mask;
+
+ reg = twl4030_read_reg_cache(codec, TWL4030_REG_OPTION);
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK)
+ mask = TWL4030_ARXL1_VRX_EN | TWL4030_ARXR1_EN;
+ else
+ mask = TWL4030_ATXL2_VTXL_EN | TWL4030_ATXR2_VTXR_EN;
+
+ if (enable)
+ reg |= mask;
+ else
+ reg &= ~mask;
+
+ twl4030_write(codec, TWL4030_REG_OPTION, reg);
+}
+