ASoC: wm8960: Support headphone jack detection function

Add two platform variables for headphone jack detection.
"hp_cfg" is for configuration of heaphone jack detection.
"gpio_cfg" is for configuration of gpio, the gpio is used
for plug & unplug interrupt on SoC.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1591180013-12416-2-git-send-email-shengjiu.wang@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/wm8960.h

@@ -16,6 +16,23 @@ struct wm8960_data {
 	bool capless;  /* Headphone outputs configured in capless mode */
 
 	bool shared_lrclk;  /* DAC and ADC LRCLKs are wired together */
+
+	/*
+	 * Setup for headphone detection
+	 *
+	 * hp_cfg[0]: HPSEL[1:0] of R48 (Additional Control 4)
+	 * hp_cfg[1]: {HPSWEN:HPSWPOL} of R24 (Additional Control 2).
+	 * hp_cfg[2]: {TOCLKSEL:TOEN} of R23 (Additional Control 1).
+	 */
+	u32 hp_cfg[3];
+
+	/*
+	 * Setup for gpio configuration
+	 *
+	 * gpio_cfg[0]: ALRCGPIO of R9 (Audio interface)
+	 * gpio_cfg[1]: {GPIOPOL:GPIOSEL[2:0]} of R48 (Additional Control 4).
+	 */
+	u32 gpio_cfg[2];
 };
 
 #endif

sound/soc/codecs/wm8960.c

@@ -1389,6 +1389,12 @@ static void wm8960_set_pdata_from_of(struct i2c_client *i2c,
 
 	if (of_property_read_bool(np, "wlf,shared-lrclk"))
 		pdata->shared_lrclk = true;
+
+	of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_cfg,
+				   ARRAY_SIZE(pdata->gpio_cfg));
+
+	of_property_read_u32_array(np, "wlf,hp-cfg", pdata->hp_cfg,
+				   ARRAY_SIZE(pdata->hp_cfg));
 }
 
 static int wm8960_i2c_probe(struct i2c_client *i2c,
@@ -1446,6 +1452,20 @@ static int wm8960_i2c_probe(struct i2c_client *i2c,
 	regmap_update_bits(wm8960->regmap, WM8960_LOUT2, 0x100, 0x100);
 	regmap_update_bits(wm8960->regmap, WM8960_ROUT2, 0x100, 0x100);
 
+	/* ADCLRC pin configured as GPIO. */
+	regmap_update_bits(wm8960->regmap, WM8960_IFACE2, 1 << 6,
+			   wm8960->pdata.gpio_cfg[0] << 6);
+	regmap_update_bits(wm8960->regmap, WM8960_ADDCTL4, 0xF << 4,
+			   wm8960->pdata.gpio_cfg[1] << 4);
+
+	/* Enable headphone jack detect */
+	regmap_update_bits(wm8960->regmap, WM8960_ADDCTL4, 3 << 2,
+			   wm8960->pdata.hp_cfg[0] << 2);
+	regmap_update_bits(wm8960->regmap, WM8960_ADDCTL2, 3 << 5,
+			   wm8960->pdata.hp_cfg[1] << 5);
+	regmap_update_bits(wm8960->regmap, WM8960_ADDCTL1, 3,
+			   wm8960->pdata.hp_cfg[2]);
+
 	i2c_set_clientdata(i2c, wm8960);
 
 	ret = devm_snd_soc_register_component(&i2c->dev,