[PATCH] ASoC: nau8825: Add ADCOUT IO drive strength control

[David Lin]

Add a property to control the driving of ADCOUT.

Signed-off-by: David Lin <CTLIN0 at nuvoton.com>
---
 Documentation/devicetree/bindings/sound/nau8825.txt | 2 ++
 sound/soc/codecs/nau8825.c                          | 6 ++++++
 sound/soc/codecs/nau8825.h                          | 3 +++
 3 files changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/nau8825.txt b/Documentation/devicetree/bindings/sound/nau8825.txt
index 388a7bc60b1f..54972cc2ca1a 100644
--- a/Documentation/devicetree/bindings/sound/nau8825.txt
+++ b/Documentation/devicetree/bindings/sound/nau8825.txt
@@ -71,6 +71,8 @@ Optional properties:
 
   - nuvoton,crosstalk-enable: make crosstalk function enable if set.
 
+  - nuvoton,adcout-drive-str: ADCOUT IO drive strength. 0 - normal, 1 - stronger.
+
   - clocks: list of phandle and clock specifier pairs according to common clock bindings for the
       clocks described in clock-names
   - clock-names: should include "mclk" for the MCLK master clock
diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c
index 8213273f501e..fc00e600cf2c 100644
--- a/sound/soc/codecs/nau8825.c
+++ b/sound/soc/codecs/nau8825.c
@@ -1983,6 +1983,10 @@ static void nau8825_init_regs(struct nau8825 *nau8825)
 	/* Disable short Frame Sync detection logic */
 	regmap_update_bits(regmap, NAU8825_REG_LEFT_TIME_SLOT,
 		NAU8825_DIS_FS_SHORT_DET, NAU8825_DIS_FS_SHORT_DET);
+	/* ADCDAT IO drive strength control */
+	regmap_update_bits(remap, NAU8825_REG_CHARGE_PUMP,
+			   NAU8825_ADCOUT_DS_MASK,
+			   nau8825->adcout_ds << NAU8825_ADCOUT_DS_SFT);
 }
 
 static const struct regmap_config nau8825_regmap_config = {
@@ -2521,6 +2525,7 @@ static void nau8825_print_device_properties(struct nau8825 *nau8825)
 			nau8825->jack_eject_debounce);
 	dev_dbg(dev, "crosstalk-enable:     %d\n",
 			nau8825->xtalk_enable);
+	dev_dbg(dev, "adcout-drive-str:     %d\n", nau8825->adcout_ds);
 }
 
 static int nau8825_read_device_properties(struct device *dev,
@@ -2587,6 +2592,7 @@ static int nau8825_read_device_properties(struct device *dev,
 		nau8825->jack_eject_debounce = 0;
 	nau8825->xtalk_enable = device_property_read_bool(dev,
 		"nuvoton,crosstalk-enable");
+	nau8825->adcout_ds = device_property_read_bool(dev, "nuvoton,adcout-drive-str");
 
 	nau8825->mclk = devm_clk_get(dev, "mclk");
 	if (PTR_ERR(nau8825->mclk) == -EPROBE_DEFER) {
diff --git a/sound/soc/codecs/nau8825.h b/sound/soc/codecs/nau8825.h
index 887bbff03ec6..6d112b6145df 100644
--- a/sound/soc/codecs/nau8825.h
+++ b/sound/soc/codecs/nau8825.h
@@ -418,6 +418,8 @@
 #define NAU8825_POWERUP_HP_DRV_L	(1 << 0)
 
 /* CHARGE_PUMP (0x80) */
+#define NAU8825_ADCOUT_DS_SFT	12
+#define NAU8825_ADCOUT_DS_MASK	(1 << NAU8825_ADCOUT_DS_SFT)
 #define NAU8825_JAMNODCLOW	(1 << 10)
 #define NAU8825_POWER_DOWN_DACR	(1 << 9)
 #define NAU8825_POWER_DOWN_DACL	(1 << 8)
@@ -477,6 +479,7 @@ struct nau8825 {
 	int imp_rms[NAU8825_XTALK_IMM];
 	int xtalk_enable;
 	bool xtalk_baktab_initialized; /* True if initialized. */
+	bool adcout_ds;
 };
 
 int nau8825_enable_jack_detect(struct snd_soc_component *component,
-- 
2.25.1