[PATCH 1/2] ASoC: nau8825: Adjust internal clock during jack detection

[David Lin <CTLIN0@nuvoton.com>]

This patch is to rasie up internal clock during jack detection.
The fast clock will accelerate charge and discharge effect.
So this mechanism will make jack detection more robust.

Signed-off-by: David Lin <CTLIN0@nuvoton.com>
---
 sound/soc/codecs/nau8825.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c
index 3eac7c92df88..ba7f5ec28609 100644
--- a/sound/soc/codecs/nau8825.c
+++ b/sound/soc/codecs/nau8825.c
@@ -1686,6 +1686,9 @@ static void nau8825_setup_auto_irq(struct nau8825 *nau8825)
 
 	/* Enable internal VCO needed for interruptions */
 	nau8825_configure_sysclk(nau8825, NAU8825_CLK_INTERNAL, 0);
+	/* Raise up the internal clock for jack detection */
+	regmap_update_bits(regmap, NAU8825_REG_CLK_DIVIDER,
+			   NAU8825_CLK_MCLK_SRC_MASK, 0);
 
 	/* Enable ADC needed for interruptions */
 	regmap_update_bits(regmap, NAU8825_REG_ENA_CTRL,
@@ -1800,6 +1803,10 @@ static int nau8825_jack_insert(struct nau8825 *nau8825)
 		break;
 	}
 
+	/* 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);
+
 	/* Leaving HPOL/R grounded after jack insert by default. They will be
 	 * ungrounded as part of the widget power up sequence at the beginning
 	 * of playback to reduce pop.
-- 
2.25.1