ASoC: nau8825: Adjust internal clock during jack detection

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>
Link: https://lore.kernel.org/r/20221122073855.43024-1-CTLIN0@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c
index 3eac7c9..ba7f5ec 100644 (file)
--- 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.