ASoC: nau8825: Add the management of headset detection for power saving

The patch is to manage HSD feature for power saving. The detail is to
disable HSD feature after the headset detection is done. When the jack
is inserted, the HSD feature will be enabled again.

Signed-off-by: David Lin <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/nau8825.c

···
 {
 	struct regmap *regmap = nau8825->regmap;
 
+	/* Enable HSD function */
+	regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL,
+			   NAU8825_HSD_AUTO_MODE, NAU8825_HSD_AUTO_MODE);
+
 	/* Enable headset jack type detection complete interruption and
 	 * jack ejection interruption.
 	 */
···
 	/* Update to the default divider of internal clock for power saving */
 	regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
 			   NAU8825_CLK_MCLK_SRC_MASK, 0xf);
+
+	/* Disable HSD function */
+	regmap_update_bits(regmap, NAU8825_REG_HSD_CTRL, NAU8825_HSD_AUTO_MODE, 0);
 
 	/* Leaving HPOL/R grounded after jack insert by default. They will be
 	 * ungrounded as part of the widget power up sequence at the beginning